title: Spatial structure of neutron Cooper pair in low density uniform matter

abstract:
  We analyze spatial structure of the neutron Cooper pair in superfluid
low-density uniform matter by means of BCS calculations employing a bare force
and the effective Gogny interaction. It is shown that the Cooper pair exhibits
a strong spatial di-neutron correlation in a wide range of neutron density
$\rho/\rho_0\approx 10^{-4}-0.5$. This feature is related to the crossover
behavior between the pairing of the weak coupling BCS type and the
Bose-Einstein condensation of bound neutron pairs. We also show that the
zero-range delta interaction can describe the spatial structure of the neutron
Cooper pair if the density dependent interaction strength and the cut-off
energy are appropriately chosen. Parameterizations of the density-dependent
delta interaction satisfying this condition are discussed.


title: Spin-Isospin Excitations and Muon Capture by Nuclei

abstract:
  By analyzing the energy-weighted moments of the strength function calculated
in RPA and beyond it is shown that the explanation of the effect of missing
strength of Gamow-Teller transitions requires that residual interaction produce
high-excited $1^{+}$ particle-hole collective states. The example of this
interaction is presented. The manifestations of spin-isospin nuclear response
in nuclear muon capture are discussed.


title: Charge Radii of beta-Stable Nuclei

abstract:
  In previous work it was shown that the radius of nucleus R is determined by
the alpha-cluster structure and can be estimated on the number of
alpha-clusters disregarding to the number of excess neutrons. A hypothesis also
was made that the radius R_m of a beta-stable isotope, which is actually
measured at electron scattering experiments, is determined by the volume
occupied by the matter of the core plus the volume occupied by the peripheral
alpha-clusters. In this paper it is shown that the condition R_m = R restricts
the number of excess neutrons filling the core to provide the beta-stability.
The number of peripheral clusters can vary from 1 to 5 and the value of R for
heavy nuclei almost do not change, whereas the number of excess neutrons should
change with the number of peripheral clusters to get the value of R_m close to
R. It can explain the path of the beta-stability and its width. The radii R_m
of the stable isotopes with 12 =< Z =< 83 and the alpha-decay isotopes with 84
=< Z =< 116 that are stable to beta-decay have been calculated.


title: A-dependence of hadronization in nuclei

abstract:
  The A-dependence of models for the attenuation of hadron production in
semi-inclusive deep-inelastic scattering on a nucleus is investigated for
realistic matter distributions. It is shown that the dependence for a pure
partonic (absorption) mechanism is more complicated than a simple $A^{2/3}$
($A^{1/3}$) behavior, commonly found when using rectangular or Gaussian
distributions, but that the A-dependence may still be indicative for the
dominant mechanism of hadronization.


title: Do halos exist on the dripline of deformed nuclei?

abstract:
  A study of the effect of deformation and pairing on the development of halo
nuclei is presented. Exploratory three-body $core+n+n$ calculations show that
both the NN interaction and the deformation/excitation of the core hinder the
formation of the halo. Preliminary self-consistent mean-field calculations are
used to search for regions in the nuclear chart where halos could potentially
develop. These are also briefly discussed.


title:
Nuclear collective tunneling transitions between Hartree states deformed
  in quadrupole symmetry

abstract:
  In a nucleus which has two Hartree states deformed in quadrupole symmetry,
i.e., prolate state and oblate state, the nuclear residual interaction derived
in the present theory beyond the Hartree approximation acts as the restoring
force for the spherical symmetry of the nuclear system to be recovered so that
the deformed nucleus makes collective tunneling transitions between prolate
states and oblate states. We derive the Hamiltonian that is effective not only
for the Hartree states but also for the collective tunneling transitions
between the Hartree states. Solving the secular equation for the effective
Hamiltonian on the basis states expressed in terms of SU(5) algebra, we analyze
the nuclear collective tunneling transitions between a prolate state and an
oblate state in the real-time description. The collective tunneling transitions
are discussed to proceed through tri-axially asymmetric deformed states.


title: Deconfinement, naturalness and the nuclear-quark equation of state

abstract:
  Baryon-loops vacuum contribution in renormalized models like the Linear sigma
model and the Walecka model give rise to large unnatural interaction
coefficients, indicating that the quantum vacuum is not adequately described by
long-range degrees of freedom. We extend such models into nonrenormalizable
class by introducing an ultraviolet cutoff into the model definition and treat
the Dirac-sea explicitly. In this way, one can avoid unnaturalness. We
calculate the equation of state for symmetric nuclear matter at zero
temperature in a modified $\sigma-\omega$ model. We show that the strong
attraction originating from the Dirac-sea softens the nuclear matter equation
of state and generates a vacuum with dynamically broken symmetry. In this model
the vector-meson is important for the description of normal nuclear matter, but
it obstructs the chiral phase transition. We investigate the chiral phase
transition in this model by incorporating deconfinement at high density. A
first-order quark deconfinement is simulated by changing the active degrees of
freedom from nucleons to quarks at high density. We show that the chiral phase
transition is first-order when quark decouples from the vector-meson and
coincides with the deconfinement critical density.


title: Insights on scalar mesons from their radiative decays

abstract:
  We estimate the rates for radiative transitions of the lightest scalar mesons
f_0(980) and a_0(980) to the vector mesons rho and omega. We argue that
measurements of the radiative decays of those scalar mesons can provide
important new information on their structure.


title: Role of isospin in the nuclear liquid-gas phase transition

abstract:
  We study the thermodynamics of asymmetric nuclear matter using a mean field
approximation with a Skyrme effective interaction, in order to establish its
phase diagram and more particularly the influence of isospin on the order of
the transition. A new statistical method is introduced to study the
thermodynamics of a multifluid system, keeping only one density fixed the
others being replaced by their intensive conjugated variables. In this ensemble
phase coexistence reduces to a simple one dimensional Maxwell construction. For
a fixed temperature under a critical value, a coexistence line is obtained in
the plane of neutron and proton chemical potentials. Along this line the grand
potential presents a discontinuous slope showing that the transition is first
order except at the two ending points where it becomes second order. This
result is not in contradiction with the already reported occurrence of a
continuous transformation when a constant proton fraction is imposed. Indeed,
the proton fraction being an order parameter in asymmetric matter, the
constraint can only be fulfilled by gradual phase mixing along the first-order
phase transition line leading to a continuous pressure.


title:
Description of electric dipole excitations in the tin isotopes within
  the quasiparticle time blocking approximation

abstract:
  The quasiparticle time blocking approximation (QTBA) is applied to describe
E1 excitations in the even-even tin isotopes. Within the model pairing
correlations, two-quasiparticle (2q), and 2q*phonon configurations are
included. Thus the QTBA is an extension of the quasiparticle random phase
approximation to include quasiparticle-phonon coupling. Calculational formulas
are presented in case of neutral excitations in the spherically symmetric
system. The main equations are written in the coordinate representation that
allows to take into account single-particle continuum completely. The E1
photoabsorption cross sections have been calculated in nuclei 116,120,124Sn. It
has been obtained that the 2q*phonon configurations provide noticeable
fragmentation of the giant dipole resonance resulting in appearance of
significant spreading width. The results are compared with available
experimental data.


title: Shell-model Hamiltonians from Density Functional Theory

abstract:
  The density functional theory of nuclear structure provides a many-particle
wave function that is useful for static properties, but an extension of the
theory is necessary to describe correlation effects or other dynamic
properties. Here we propose a procedure to extend the theory by mapping the
properties of the self-consistent mean-field Hamiltonian onto an effective
shell-model Hamiltonian with two-body interactions. In this initial study, we
consider the sd-shell nuclei Ne-20, Mg-24, Si-28, and Ar-36. Our first
application is in the framework of the USD shell-model Hamiltonian, using its
mean-field approximation to construct an effective Hamiltonian and partially
recover correlation effects. We find that more than half of the correlation
energy is due to the quadrupole interaction. We then follow a similar procedure
but using the SLy4 Skyrme energy functional as our starting point and
truncating the space to the spherical $sd$ shell. The constructed shell-model
Hamiltonian is found to satisfy minimal consistency requirements to reproduce
the properties of the mean-field solution. The quadrupolar correlation energies
computed with the mapped Hamiltonian are reasonable compared with those
computed by other methods.


title: Direct photons from Au+Au collisions at RHIC: QGP vs. hot hadronic gas

abstract:
  We have analysed the preliminary PHENIX data on the transverse momentum
distribution of direct photons in 0-20% centrality Au+Au collisions at
$\sqrt{s_{NN}}$=200 GeV. In ideal hydrodynamics, data are explained if Au+Au
collision produces Quark-Gluon-Plasma at the temperature $T_i$=400 MeV, at an
initial time $\tau_i$=0.6 fm. PHENIX data are not explained in the alternate
scenario when Au+Au collisions produces hot hadronic gas with initial
temperature within physically acceptable limit.


title:
Pairing Correlations in Odd-Mass Carbon Isotopes and Effect of Pauli
  Principle in Particle-Core Coupling in 13C and 11Be

abstract:
  We present an exploratory study of structure of 13C, 15C, 17C and
  19C, showing that the simple one-quasiparticle projected BCS
  (PBCS) model is capable to account for several important properties of these
nuclei. Next we discuss the importance of the Pauli Principle in the
particle-core models of normal-parity states in 13C and 11Be. This is done by
considering the pairing interaction between nucleons moving in an over-all
deformed potential. To assess the importance of pairing correlations in these
light nuclei we use both the simple BCS and the PBCS approximations. We show
that the Pauli Principle plays a crucial role in the parity inversion in 11Be.
It is also found that the effect of the particle number conservation in
relatively light and/or exotic nuclei is quite significant.
  Comparison of our results with several recent papers on the same subject, as
well as with some experimental data, is presented.


title: Effective mass of free neutrons in neutron star crust

abstract:
  The inner layers of a neutron star crust, composed of a Coulomb lattice of
neutron rich nuclear clusters immersed in a sea of ``free'' superfluid
neutrons, are closely analogous to periodic condensed matter systems such as
electronic, photonic or phononic crystals. Applying methods from solid state
physics to the neutron star context, we study the transport properties of those
``free'' neutrons for the outermost layers of the inner crust, near the drip
point $\rho_{\rm drip} \sim 4\times 10^{11}$ g.cm$^{-3}$. In particular, we
evaluate the effective neutron mass resulting from Bragg scattering by a band
structure calculation. Comparison is made with the case of electrons in solids.
The observational consequences are briefly discussed.


title: Isospin-breaking corrections in the pion-deuteron scattering length

abstract:
  It is shown that isospin-breaking corrections to the pion-deuteron scattering
length can be very large, because of the vanishing of the isospin-symmetric
contribution to this scattering length at leading order in chiral perturbation
theory. We further demonstrate that these corrections can explain the bulk of
the discrepancy between the recent experimental data on pionic hydrogen and
pionic deuterium. We also give the first determination of the electromagnetic
low-energy constant f1.


title:
Microscopic analysis of shape-phase transitions in even-even N~90
  rotating nuclei

abstract:
  We study in cranked Nilsson plus random phase approximation shape transitions
in fast rotating nuclei undergoing backbending, more specifically 156Dy and
162Yb. We found that a backbending in 156Dy is correlated with the
disappearance of the collective, positive signature gamma-vibrational mode in
the rotating frame, and, a shape transition (from axial to nonaxial) is
accompanied with a large acquiring of the gamma-deformation. We show that such
a shape transition can be considered as a phase transition of the first order.
In 162Yb the quasiparticle alignment dominates in the backbending and the shape
transition (from axial to nonaxial) is accompanied with a smooth transition
from zero to nonzero values of the gamma-deformation. We extend the classical
Landau theory for rotating nuclei and show that the backbending in 162Yb is
identified with the second order phase transition. A description of spectral
and decay properties of the yrast states and low-lying excitations demonstrates
a good agreement between our results and experimental data.


title:
Phenomenological model of the Kaonic Nuclear Cluster K^-pp in the ground
  state

abstract:
  A phenomenological model is proposed for the analysis of the properties of
the Kaonic Nuclear Cluster (KNC) Kpp in its ground state. Inside the KNC K^-pp
we describe the relative motion of the protons in the pp pair and the motion of
the K^- meson relative to the pp pair in terms of wave functions of
3-dimensional harmonic oscillators. The interaction strength is parameterised
in our model by the frequency of the longitudinal oscillation of the K^- meson
relative to the pp pair. This parameter was determined with the binding energy
and width of the strange baryon Lambda(1405) by assuming that it is a bound
state of the K^-p pair. In terms of this interaction strength we calculate the
binding energy epsilon_(Kpp) = - 118 MeV, the partial widths of non-pionic
decay channels and the total width, Gamma_(Kpp) = 58 MeV. This agrees well with
the experimental data by the FINUDA Collaboration (PRL 94, 212303 (2005)):
epsilon_exp = - 115(+6/-5) MeV and Gamma_exp = 67(+14/-11) MeV. The discrepancy
with the results, obtained by Akaishi and Yamazaki within the potential model
approach, is discussed.


title: alpha-particle photoabsorption with a realistic nuclear force

abstract:
  The 4He total photoabsorption cross section is calculated with the realistic
nucleon-nucleon potential Argonne V18 and the three-nucleon force (3NF) Urbana
IX. Final state interaction is included rigorously via the Lorentz Integral
Transform method. A rather pronounced giant resonance with peak cross sections
of 3 (3.2) mb is obtained with (without) 3NF. Above 50 MeV strong 3NF effects,
up to 35%, are present. Good agreement with experiment is found close to
threshold. A comparison in the giant resonance region is inconclusive, since
present data do not show a unique picture.


title: Two-component model for the deuteron electromagnetic structure

abstract:
  We suggest a simple phenomenological parametrization for all three deuteron
electromagnetic form factors, and show that a good fit on the available data,
with a minimal number of parameters, can be obtained. The present description
of the deuteron electromagnetic structure is based on two components with
different radii, one corresponding to two nucleons separated by $\simeq $2 fm,
and a standard isoscalar contribution, saturated by $\omega$ and $\phi$ mesons,
only.


title: Dynamics of Resonances in Strongly Interacting Systems

abstract:
  The effects of the propagation of particles which have a finite life-time and
an according broad distribution in their mass spectrum are discussed in the
context of a transport descriptions. In the first part some example cases of
mesonic modes in nuclear matter at finite densities and temperatures are
presented. These equilibrium calculations illustrate the dynamical range of
spectral distributions to be adequately covered by non-equilibrium description
of the dynamics of two nuclei colliding at high energies. The second part
addresses the problem of transport descriptions which properly account for the
damping width of the particles. A systematic and general gradient approximation
is presented in the form of diagrammatic rules which permit to derive a
self-consistent transport scheme from the Kadanoff--Baym equation. The scheme
is conserving and thermodynamically consistent provided the self-energies are
obtained within the Phi-derivable two-particle irreducible (2PI) method of
Baym. The merits, the limitations and partial cures of the limitations of this
transport scheme are discussed in detail.


title:
Predictions of alpha-decay half-lives based on potentials from
  self-consistent mean-field models

abstract:
  We present a microscopic model for the calculation of alpha-decay half lives
employing potentials obtained from relativistic and non-relativistic
self-consistent mean-field models. The nuclear and Coulomb potentials are used
to obtain the tunneling probability and, in one model variant, also the
knocking frequency. The model contains only one parameter. We compare this
approach employing several modern mean-field parametrizations to experimental
data and to the semi-empirical Viola-Seaborg systematics. We extrapolate our
model to superheavy nuclei where assumptions entering semi-empirical approaches
might lose validity.


title:
Suppression of Non-photonic Electrons from Enhancement of Charm Baryons
  in Heavy Ion Collisions

abstract:
  At intermediate transverse momentum (2 < p_T < 6 GeV/c), baryon production in
Au+Au collisions is enhanced compared to p+p collisions. Since charm baryon
decays produce electrons less frequently than charm meson decays, the
non-photonic electron spectrum is sensitive to the Lambda_c/D ratio. In this
report we study the dependence of the non-photonic electron spectrum on the
baryon-to-meson ratio for charm hadrons. As an example, we take the Lambda_c/D
ratio to have the same form as the Lambda/K^0_S ratio. In this case, even if
the total charm quark yield in Au+Au collisions scales with the number of
binary nucleon-nucleon collisions (N_bin), the electron spectrum at 2 < p_T < 5
GeV/c is suppressed relative to N_bin scaled p+p collisions by as much as 20%.


title: Parity Nonconservation in Elastic $\vec{p} p$ Scattering

abstract:
  By looking at the parity-nonconserving (PNC) asymmetries at different
energies in $\vec{p} p$ scattering, it is in principle possible to determine
the PNC $\rho NN$ and $\omega NN$ couplings of a single-meson-exchange model of
the PNC $NN$ force. The analysis of the experimental data at 13.6, 45 and 221
MeV simultaneously has been performed by Carlson \textit{et al.}, who concluded
to an agreement with the original DDH estimates for the PNC meson-nucleon
couplings. In this work, it is shown first that the comparison with updated
hadronic predictions of these couplings rather suggests the existence of some
discrepancy for the PNC $\omega NN$ coupling. The effect of variations on the
strong coupling constants and introduction of cutoffs in the one-boson-exchange
weak potential is then investigated. As expected, it turns out that the
resulting asymmetry is quite sensitive to these parameters regardless of the
energy. However the above discrepancy persists. The dependence of this
conclusion on various ingredients entering an improved description of the PNC
$NN$ force is also examined. These include the two-pion resonance nature of the
rho meson and some momentum dependence of the isoscalar PNC $\rho NN$ vertex.
It is found that none of these corrections is able to remove or even alleviate
the above discrepancy. Their impacts on the theoretical determination of the
vector meson-nucleon couplings, the description of the PNC force in terms of
single-meson exchanges, or the interpretation of measurements, are finally
examined.


title: Meson Production on the Nucleon in the Giessen K-Matrix Approach

abstract:
  Meson production on the proton is described in a coupled channels K-matrix
approach. Both hadronic and photonic scenarios are taken into account on the
same theoretical footing. At tree-level the Born amplitudes are obtained from
an effective Lagrangian with phenomenologically adjustable coupling constants.
The spectral distributions, resonances and their width and the background
contributions are obtained within the same approach, thus accounting properly
for interference effects. Applications to omega- and associated strangeness
production on the proton are discussed.


title: Self-Consistent Separable Rpa Approach for Skyrme Forces: Axial Nuclei

abstract:
  The self-consistent separable RPA (random phase approximation) method is
formulated for Skyrme forces with pairing. The method is based on a general
self-consistent procedure for factorization of the two-body interaction. It is
relevant for various density- and current-dependent functionals. The
contributions of the time-even and time-odd Skyrme terms as well as of the
Coulomb and pairing terms to the residual interaction are taken
self-consistently into account. Most of the expression have a transparent
analytical form, which makes the method convenient for the treatment and
analysis. The separable character of the residual interaction allows to avoid
diagonalization of high-rank RPA matrices and thus to minimize the calculation
effort. The previous studies have demonstrated high numerical accuracy and
efficiency of the method for spherical nuclei. In this contribution, the method
is specified for axial nuclei. We provide systematic and detailed presentation
of formalism and discuss different aspects of the model.


title: Analytical Special Solutions of the Bohr Hamiltonian

abstract:
  The following special solutions of the Bohr Hamiltonian are briefly
described: 1) Z(5) (approximately separable solution in five dimensions with
gamma close to 30 degrees), 2) Z(4) (exactly separable gamma-rigid solution in
four dimensions with gamma = 30 degrees), 3) X(3) (exactly separable
gamma-rigid solution in three dimensions with gamma =0). The analytical
solutions obtained using Davidson potentials in the E(5), X(5), Z(5), and Z(4)
frameworks are also mentioned.


title:
Determination of $\pi^+-$ meson polarizabilities from the
  $\gamma\gamma->\pi^+\pi^-$ process

abstract:
  A fit of the experimental data to the total cross section of the process
$\gamma\gamma->\pi^+\pi^-$ in the energy region from threshold to 2500 MeV has
been carried out using dispersion relations with subtractions for the invariant
amplitudes, where the dipole and the quadrupole polarizabilities of the charged
pion are free parameters. As a result, the sum and the difference of the
electric and magnetic dipole and quadrupole polarizabilities of the charged
pion have been found: $(alpha_1+\beta_1)=(0.18+0.11-0.02)10^(-4)fm^3$,
$(alpha_1-\beta_1)=(13.0+3.6-1.9)10^(-4)fm^3$, $(alpha_2+\beta_2)=(0.133+-
0.015)10^(-4)fm^5$, $(alpha_2-\beta_2)=(25.0+0.8-0.3)10^(-4)fm^5$. These values
agree with the dispersion sum rule predictions. The value found for the
difference of the dipole polarizabilities is consistent with the results
obtained from scattering of high energy $\pi^-$ mesons off the Coulomb field of
heavy nuclei (Serpukhov (1983)) and from radiative $\pi^+$ photoproduction from
the proton at MAMI (2005), while it is at variance with the calculations in the
framework of chiral perturbation theory.


title: Schwinger functions and light-quark bound states, and sigma terms

abstract:
  We explore the viability of using solely spacelike information about a
Schwinger function to extract properties of bound states. In a concrete example
it is not possible to determine properties of states with masses \gsim 1.2 GeV.
Modern Dyson-Schwinger equation methods supply a well-constrained tool that
provide access to hadron masses and \sigma-terms. We report values of the
latter for a range of hadrons. Of interest is analysis relating to a u,d scalar
meson, which is compatible with a picture of the lightest 0^{++} as a bound
state of a dressed-quark and -antiquark supplemented by a material pion cloud.
A constituent-quark \sigma-term is defined, which affords a means for assessing
the flavour-dependence of dynamical chiral symmetry breaking.


title: Viscous relativistic hydrodynamics

abstract:
  I review recent and not so recent progress on formulating and numerically
implementing a consistent set of relativistic equations which describe the
space-time evolution of viscous relativistic fluids without violating
causality.


title: U(3) and Pseudo-U(3) Symmetry of the Relativistic Harmonic Oscillator

abstract:
  We show that a Dirac Hamiltonian with equal scalar and vector harmonic
oscillator potentials has not only a spin symmetry but an U(3) symmetry and
that a Dirac Hamiltonian with scalar and vector harmonic oscillator potentials
equal in magnitude but opposite in sign has not only a pseudospin symmetry but
a pseudo-U(3) symmetry. We derive the generators of the symmetry for each case.


title: "RHIC serves the perfect fluid" -- Hydrodynamic flow of the QGP

abstract:
  The bulk of the hot and dense matter created at RHIC behaves like an almost
ideal fluid. I present the evidence for this and also discuss what we can learn
about the transport properties of the quark-gluon plasma (QGP) from the gradual
breakdown of ideal fluid dynamic behavior at large transverse momenta, lower
beam energies, larger impact parameters, and forward rapidities.


title: Semi-classical and anharmonic quantum models of nuclear wobbling motion

abstract:
  A semi-classical model for wobbling motion is presented as an extension to
the Bohr-Mottelson model of wobbling motion. Using the resultant wobbling
potential, a quantum mechanical equation is derived for anharmonic wobbling
motion. We then attempt to explain the anharmonicity observed in the excited
bands of two wobbling phonons in the A=160 region.


title:
Fragment isospin distributions and the phase diagram of excited nuclear
  systems

abstract:
  Fragment average isospin distributions are investigated within a
microcanonical multifragmentation model in different regions of the phase
diagram. The results indicate that in the liquid phase $<N/Z>$ versus $Z$ is
monotonically increasing, in the phase coexistence region it has a rise and
fall shape and in the gas phase it is constant. Deviations from this behavior
may manifest at low fragment multiplicity as a consequence of mass/charge
conservation. Characterization of the "free" and "bound" phases function of
fragment charge reconfirms the neutron enrichment of the "free" phase with
respect to the "bound" one irrespectively the localization of the
multifragmentation event in the phase diagram.


title:
The One-Body and Two-Body Density Matrices of Finite Nuclei and
  Center-of-Mass Correlations

abstract:
  A method is presented for the calculation of the one-body and two-body
density matrices and their Fourier transforms in momentum space, that is
consistent with the requirement for translational invariance, in the case of a
nucleus (a finite self-bound system). We restore translational invariance by
using the so-called fixed center-of-mass approximation for constructing an
intrinsic nuclear ground state wavefunction by starting from a
non-translationally invariant wavefunction and applying a projection
prescription. We discuss results for the one-body and two-body momentum
distributions of the 4He nucleus calculated with the Slater determinant of the
harmonic oscillator orbitals, as the initial non-translationally invariant
wavefunction. Effects of such an inclusion of CM correlations are found to be
quite important in the momentum distributions.


title: Aspects of phi-meson production in proton-proton collisions

abstract:
  We analyze near-threshold cross section data for the reaction pp->pp phi
published by the DISTO collaboration and recent, still preliminary results
presented by the ANKE Collaboration. We formulate a procedure to evaluate the
OZI ratio at low energies by taking into account corrections from the
kinematics and the final-state interaction. Combining the new data with the few
measurements available at higher energies we give a limit for the OZI rule
violation and estimate the possible contribution from a five-quark baryonic
resonance coupled to the phi-p system.


title:
Nuclear Structure and Response based on Correlated Realistic NN
  Interactions

abstract:
  Starting from the Argonne V18 nucleon-nucleon (NN) interaction and using the
Unitary Correlation Operator Method, a correlated interaction v_UCOM has been
constructed, which is suitable for calculations within restricted Hilbert
spaces. In this work we employ the v_UCOM in Hartree-Fock, perturbation-theory
and RPA calculations and we study the ground-state properties of various
closed-shell nuclei, as well as some excited states. The present calculations
provide also important feedback for the optimization of the v_UCOM and valuable
information on its properties. The above scheme offers the prospect of ab
initio calculations in nuclei, regardless of their mass number. It can be used
in conjunction with other realistic NN interactions as well, and with various
many-body methods (Second RPA, QRPA, Shell Model, etc.).


title: Momentum distribution of Delta- isobar in closed shell nuclei

abstract:
  One Delta- isobar components of the wave function in closed shell nuclei are
considered within the framework of the harmonic oscillator model. Conventional
transition potential is the pi- and rho- exchange potential. On the basis of
the Delta- isobar configuration wave function, the momentum distribution of the
Delta- isobar is calculated for the light nuclei $^4 He$,$^{16}O$,$^{12}C$


title:
Mixed Representation RPA Calculation for Octupole Excitations on
  Superdeformed Sates in the 40Ca and Neutron-Rich Sulfur Regions

abstract:
  By means of the mixed representation RPA based on the Skyrme-Hartree-Fock
mean field, we investigate low-frequency octupole excitations built on the
superdeformed (SD) states in the N=Z nuclei around 40Ca and the neutron-rich
Sulfur isotopes. The RPA calculation is carried out fully self-consistently on
the three-dimensional Cartesian mesh in a box, and yields a number of
low-frequency octupole vibrations built on the SD states in 32S, 36Ar, 40Ca and
44Ti. In particular, a strongly collective K^\pi=1^- octupole vibration is
suggested to appear on top of the SD state in 40Ca. For 48,50S close to the
neutron drip line, we find that the low-lying state created by the excitation
of a single neutron from a loosely bound low Omega level to a high Omega
resonance level acquires an extremely strong octupole transition strength due
to the spatially very extended structure of the particle-hole wave functions.


title: Resonances and final state interactions in the reaction pp->pK^+Lambda

abstract:
  A study of the strangeness production reaction pp->pK^+Lambda for excess
energies of epsilon \le 150 MeV, accessible at high-luminosity accelerator
facilities like COSY, is presented. Methods to analyze the Dalitz plot
distribution and angular spectra in the Jackson and helicity frames are worked
out and suitable observables for extracting information on low lying resonances
that couple to the K-Lambda system and for determining the Lambda-p
effective-range parameters from the final state interaction are identified and
discussed. Furthermore, the chances for identifying the reaction mechanism of
strangeness production are investigated.


title:
Bose-Einstein or HBT correlation signature of a second order QCD phase
  transition

abstract:
  For particles emerging from a second order QCD phase transition, we show that
a recently introduced shape parameter of the Bose-Einstein correlation
function, the Levy index of stability equals to the correlation exponent - one
of the critical exponents that characterize the behavior of the matter in the
vicinity of the second order phase transition point. Hence the shape of the
Bose-Einstein / HBT correlation functions, when measured as a function of
bombarding energy and centrality in various heavy ion reactions, can be
utilized to locate experimentally the second order phase transition and the
critical end point of the first order phase transition line in QCD.


title:
Nuclear multifragmentation within the framework of different statistical
  ensembles

abstract:
  The sensitivity of the Statistical Multifragmentation Model to the underlying
statistical assumptions is investigated. We concentrate on its micro-canonical,
canonical, and isobaric formulations. As far as average values are concerned,
our results reveal that all the ensembles make very similar predictions, as
long as the relevant macroscopic variables (such as temperature, excitation
energy and breakup volume) are the same in all statistical ensembles. It also
turns out that the multiplicity dependence of the breakup volume in the
micro-canonical version of the model mimics a system at (approximately)
constant pressure, at least in the plateau region of the caloric curve.
However, in contrast to average values, our results suggest that the
distributions of physical observables are quite sensitive to the statistical
assumptions. This finding may help deciding which hypothesis corresponds to the
best picture for the freeze-out stage


title: Theory of the two-proton radioactivity in the continuum shell model

abstract:
  We develop the microscopic description of the two-nucleon radioactivity in
the framework of the Shell Model Embedded in the Continuum. This approach is
applied for the description of spontaneous two-proton radioactivity in
$^{45}$Fe, $^{48}$Ni and $^{54}$Zn.


title:
Nucleon Polarizabilities from Deuteron Compton Scattering within a
  Green's-Function Hybrid Approach

abstract:
  We examine elastic Compton scattering from the deuteron for photon energies
ranging from zero to 100 MeV, using state-of-the-art deuteron wave functions
and NN-potentials. Nucleon-nucleon rescattering between emission and absorption
of the two photons is treated by Green's functions in order to ensure gauge
invariance and the correct Thomson limit. With this Green's-function hybrid
approach, we fulfill the low-energy theorem of deuteron Compton scattering and
there is no significant dependence on the deuteron wave function used.
Concerning the nucleon structure, we use Chiral Effective Field Theory with
explicit \Delta(1232) degrees of freedom within the Small Scale Expansion up to
leading-one-loop order. Agreement with available data is good at all energies.
Our 2-parameter fit to all elastic $\gamma d$ data leads to values for the
static isoscalar dipole polarizabilities which are in excellent agreement with
the isoscalar Baldin sum rule. Taking this value as additional input, we find
\alpha_E^s= (11.3+-0.7(stat)+-0.6(Baldin)) x 10^{-4} fm^3 and \beta_M^s =
(3.2-+0.7(stat)+-0.6(Baldin)) x 10^{-4} fm^3 and conclude by comparison to the
proton numbers that neutron and proton polarizabilities are essentially the
same.


title: Elastic Compton Scattering from the Nucleon and Deuteron

abstract:
  Goal of this work is the consistent description of elastic Compton scattering
from the single nucleon and the deuteron. The theoretical framework chosen is
Chiral Perturbation Theory, which is the low-energy formulation of Quantum
Chromodynamics, where we extend the spectrum of active degrees of freedom from
only pions and nucleons to also the Delta(1232) resonance. In the deuteron
sector, we treat the nucleon-nucleon interaction non-perturbatively. Besides
the Compton cross sections, our main concern is with the nucleon
polarizabilities, which are a useful tool to describe the reaction of the
internal nucleonic degrees of freeedom to the external electromagnetic field.
Experimentally, only a few nucleon polarizabilities are known. Especially our
present knowledge of the neutron polarizabilities is not satisfying. The reason
why it is so difficult to determine these quantities experimentally is the
finite lifetime of the free neutron. Therefore, we want to contribute to the
ongoing discussion of the neutron polarizabilities by fitting the average over
proton and neutron polarizabilities to the elastic deuteron Compton-scattering
data. Similarly, we determine the proton polarizabilities from fits to the
single-proton Compton data. We finally combine both results in order to
identify the neutron polarizabilities.


title:
4He experiments can serve as a database for determining the
  three-nucleon force

abstract:
  We report on microscopic calculations for the 4He compound system in the
framework of the resonating group model employing realistic nucleon-nucleon and
three nucleon forces. The resulting scattering phase shifts are compared to
those of a comprehensive R-matrix analysis of all data in this system, which
are available in numerical form. The agreement between calculation and analysis
is in most cases very good. Adding three-nucleon forces yields in many cases
large effects. For a few cases the new agreement is striking. We relate some
differencies between calculation and analysis to specific data and discuss
neccessary experiments to clarify the situation. From the results we conclude
that the data of the 4He system might be well suited to determine the structure
of the three-nucleon force.


title:
Fusion reactions in plasmas as probe of the high-momentum tail of
  particle distributions

abstract:
  In fusion reactions, the Coulomb barrier selects particles from the
high-momentum part of the distribution. Therefore, small variations of the
high-momentum tail of the velocity distribution can produce strong effects on
fusion rates. In plasmas several potential mechanisms exist that can produce
deviations from the standard Maxwell-Boltzmann distribution. Quantum broadening
of the energy-momentum dispersion relation of the plasma quasi-particles
modifies the high-momentum tail and could explain the fusion-rate enhancement
observed in low-energy nuclear reaction experiments.

categories: nucl-th cond-mat.stat-mech nucl-ex physics.plasm-ph


title:
Single and double pi^{-}/pi^{+} ratios in heavy-ion reactions as probes
  of the high-density behavior of the nuclear symmetry energy

abstract:
  Based on an isospin- and momentum-dependent hadronic transport model IBUU04,
effects of the nuclear symmetry energy on the single and double
pi^{-}/pi^{+}ratios in central reactions of ^{132}Sn+^{124}Sn and
^{112}Sn+^{112}Sn at a beam energy of 400 MeV/nucleon are studied. It is found
that around the Coulomb peak of the single pi^{-}/pi^{+} ratio the double
pi^{-}/pi^{+} ratio taken from the two isotopic reactions retains about the
same sensitivity to the density dependence of nuclear symmetry energy. Because
the double pi^{-}/pi^{+}ratio can reduce significantly the systematic errors,
it is thus a more effective probe for the high-density behavior of the nuclear
symmetry energy.


title: The hyperon mean free paths in the relativistic mean field

abstract:
  The $\Lambda$- and $\Xi^-$-hyperon mean free paths in nuclei are firstly
calculated in the relativistic mean field (RMF) theory. The real parts of the
optical potential are derived from the RMF approach, while the imaginary parts
are obtained from those of nucleons with the relations:
$U^{\mathrm{IY}}_{\mathrm{S}} = \alpha_{\sigma \mathrm{Y}}\cdot
U_{\mathrm{S}}^{\mathrm{IN}}$ and $U^{\mathrm{IY}}_{\mathrm{V}} =
\alpha_{\omega \mathrm{Y}}\cdot U_{\mathrm{V}}^{\mathrm{IN}}$ . With the
assumption, the depth of the imaginary potential for $\Xi^-$ is
$W_{\Xi}\simeq-$ 3.5 MeV, and for $\Lambda$ is $W_{\Lambda}\simeq-$ 7 MeV at
low incident energy. We find that, the hyperon mean free path decreases with
the increase of the hyperon incident energies, from 200 MeV to 800 MeV; and in
the interior of the nuclei, the mean free path is about $2\sim 3$ fm for
$\Lambda$, and about $4\sim 8$ fm for $\Xi^-$, depending on the hyperon
incident energy.


title:
Helicity amplitudes and electromagnetic decays of strange baryon
  resonances

abstract:
  We present results for the helicity amplitudes of the lowest-lying hyperon
resonances Y*, computed within the framework of the Bonn constituent-quark
model, which is based on the Bethe-Salpeter approach. The seven parameters
entering the model are fitted against the best known baryon masses.
Accordingly, the results for the helicity amplitudes are genuine predictions.
Some hyperon resonances are seen to couple more strongly to a virtual photon
with finite Q^2 than to a real photon. Other Y*'s, such as the S_{01}(1670)
Lambda resonance or the S_{11}(1620) Sigma resonance, have large
electromagnetic decay widths and couple very strongly to real photons. The
negatively-charged and neutral members of a Sigma* triplet may couple only
moderately to the Sigma(1193), while the positively-charged member of the same
Sigma* triplet displays a relatively large coupling to the Sigma^+(1193) state.
This illustrates the necessity of investigating all isospin channels in order
to obtain a complete picture of the hyperon spectrum.


title: Threshold effects in relativistic gases

abstract:
  Particle multiplicities and ratios in the microcanonical ensemble of
relativistic gases near production thresholds are studied. It is shown that the
ratio of heavy to light particle multiplicity may be enhanced in comparison to
its thermodynamic limit.


title:
On the estimate of the sigma^(I = 1)_(KN)(0)-term value from the energy
  level shift of kaonic hydrogen in the ground state

abstract:
  Using the experimental data on the energy level shift of kaonic hydrogen in
the ground state (the DEAR Collaboration, Phys. Rev. Lett. 94, 212302 (2005))
and the theoretical value of the energy level shift, calculated within the
phenomenological quantum field theoretic approach to the description of strong
low-energy anti-K N and anti-K NN interactions developed at Stefan Meyer
Institut fuer subatomare Physik in Vienna, we estimate the value of the
sigma^(I = 1)_(KN)(0)-term of low-energy anti-K N scattering. We get sigma^(I =
1)_(KN)(0) = (433 +/- 85) MeV. This testifies the absence of strange quarks in
the proton structure.


title:
Gauge-Invariant Approach to Meson Photoproduction Including the
  Final-State Interaction

abstract:
  A gauge-invariant formalism is presented for the practical treatment of
photo- and electroproduction of pseudoscalar mesons off nucleons that allows an
explicit incorporation of hadronic final-state interactions. The
semi-phenomenological approach is based on a field theory developed by one of
the authors. It generalizes an earlier approach by allowing for systematic
improvement of approximations in a controlled manner. The practical feasibility
is illustrated by applying the lowest-order result to the photoproduction of
both neutral and charged pions.


title:
Chiral dynamics of the $\Lambda(1520)$ in coupled channels tested in the
  $K^-p\to\pi\pi\Lambda$ reaction

abstract:
  The $\Lambda(1520)$ resonance is generated dynamically in a unitary coupled
channel framework with the $\pi\Sigma^*$ and $K\Xi^*$ channels in s-wave and
$\pi\Sigma$ and $\bar K N$ channels in d-wave. The dynamics of this resonance
close to and above threshold is then tested through the reactions
$K^-p\to\pi\pi\Lambda$ and a good agreement with the experimentally measured
cross section is observed.


title:
Analyzing $\eta'$ Photoproduction Data on the Proton at Energies of
  1.5--2.3 GeV

abstract:
  A combined analysis of the existing data on the reactions $\gamma p \to p
\eta^\prime $ and $pp \to pp\eta^\prime $, based on a relativistic meson
exchange model of hadronic interactions, is presented.


title:
Hadron Production in the Trans-fragmentation Region in Heavy-Ion
  Collisions

abstract:
  We study the production of hadrons in Au+Au collisions in the region
$0.6<x_F<1.2$, which we refer to as the trans-fragmentation region (TFR), since
it corresponds roughly to $\eta'>0$, where $\eta'=\eta-y_{\rm beam}$, depending
on $p_T$. We show how hadrons can be produced in that region when the
hadronization process is parton recombination. The inclusive $x$-distributions
for proton and pion production are calculated with momentum degradation taken
into account. The results show that the proton yield is significantly higher
than that of the pions in the TFR. Without particle identification the existing
data cannot be used for comparison with our result on the $p/\pi$ ratio.
Without $p_T$ determination it is not feasible to relate the $x$ distribution
to the experimental $\eta'$ distribution. Nevertheless, on theoretical grounds
we have shown why the production of hadrons in the TFR is not forbidden by
momentum conservation.


title: Elastic, Inelastic, and Path Length Fluctuations in Jet Tomography

abstract:
  We propose a possible perturbative QCD solution to the heavy quark tomography
problem posed by recent non-photonic single electron data from central Au+Au
collisions at $\sqrt{s} = 200$ AGeV. Jet quenching theory is extended to
include (1) elastic as well as (2) inelastic parton energy losses and (3) jet
path length fluctuations. The three effects combine to reduce the discrepancy
between theory and the data without violating the global entropy bounds from
multiplicity and elliptic flow data. We also check for consistency with the
pion suppression data out to 20 GeV. Fluctuations of the geometric jet path
lengths and the difference between the widths of fluctuations of elastic and
inelastic energy loss play essential roles in the proposed solution.


title: Variational Calculation on A=3 and 4 Nuclei with Non-Local Potentials

abstract:
  The application of the hyperspherical harmonic approach to the case of
non-local two-body potentials is described. Given the properties of the
hyperspherical harmonic functions, there are no difficulties in considering the
approach in both coordinate and momentum space. The binding energies and other
ground state properties of A=3 and 4 nuclei are calculated using the CD Bonn
2000 and N3LO two-body potentials. The results are shown to be in excellent
agreement with corresponding ones obtained by other accurate techniques.


title: Universal scaling of the elliptic flow data at RHIC

abstract:
  Recent PHOBOS measurements of the excitation function for the pseudo-rapidity
dependence of elliptic flow in Au+Au collisions at RHIC, have posed a
significant theoretical challenge. Here we show that these differential
measurements, as well as the RHIC measurements on transverse momentum satisfy a
universal scaling relation predicted by the Buda-Lund model, based on exact
solutions of perfect fluid hydrodynamics. We also show that recently found
transverse kinetic energy scaling of the elliptic flow is a special case of
this universal scaling.


title: N phi state in chiral quark model

abstract:
  The structures of N phi states with spin-parity J^{p}=3/2^- and J^p=1/2^- are
dynamically studied in both the chiral SU(3) quark model and the extended
chiral SU(3) quark model by solving a resonating group method (RGM) equation.
The model parameters are taken from our previous work, which gave a
satisfactory description of the energies of the baryon ground states, the
binding energy of the deuteron, the nucleon-nucleon (NN) scattering phase
shifts, and the hyperon-nucleon (YN) cross sections. The channel coupling of N
phi and Lambda K* is considered, and the effect of the tensor force which
results in the mixing of S and D waves is also investigated. The results show
that the N phi state has an attractive interaction, and in the extended chiral
SU(3) quark model such an attraction plus the channel coupling effect can
consequently make for an N phi quasi-bound state with several MeV binding
energy.


title:
Energy densities and equilibration in heavy ion collisions at sqrt(s) =
  200 GeV with the quark-gluon string model

abstract:
  We study thermodynamic characteristica of ultra-relativistic Au+Au collisions
at RHIC energy sqrt(s) = 200 GeV within the framework of a microscopic
transport model, namely the quark-gluon string model (QGSM). The temporal
evolution of the local energy density, transverse and longitudinal pressure and
equilibration times are considered. In contrast to complete equilibration which
is even in central reactions hardly achieved, pre-equilibrium stages with
energy densities well above the critical energy density predicted by lattice
QCD are established at short time scales. Corresponding energy density profiles
at proper time tau = 1 fm/c compare well with hydrodynamical assumptions for
initial energy density distributions.


title:
Full major-shell calculation for states that were degenerate in a
  single-j-shell calculation

abstract:
  A full fp calculation is performed for states which were degenerate in a
single-j-shell calculation in which isospin-zero two-body matrix elements were
set to zero energy. Most of the splitting in a complete shell calculation (but
not all) comes from the T=0 part of the interaction.


title: Signatures of chiral dynamics in the Nucleon to Delta transition

abstract:
  Utilizing the methods of chiral effective field theory we present an analysis
of the electromagnetic $N\Delta$-transition current in the framework of the
non-relativistic "small scale expansion" (SSE) to leading-one-loop order. We
discuss the momentum dependence of the magnetic dipole, electric quadrupole and
coulomb quadrupole transition form factors up to a momentum transfer of
$Q^2<0.3$ GeV$^2$. Particular emphasis is put on the identification of the role
of chiral dynamics in this transition. Our analysis indicates that there is
indeed non-trivial momentum dependence in the two quadrupole form factors at
small $Q^2<0.15$ GeV$^2$ arising from long distance pion physics, leading for
example to negative radii in the (real part of the) quadrupole transition form
factors. We compare our results with the EMR($Q^2$) and CMR($Q^2$)
multipole-ratios from pion-electroproduction experiments and find a remarkable
agreement up to four-momentum transfer of $Q^2\approx 0.3$ GeV$^2$. Finally, we
discuss the chiral extrapolation of the three transition form factors at
$Q^2=0$, identifying rapid changes in the (real part of the) quark-mass
dependence of the quadrupole transition moments for pion masses below 200 MeV,
which arise again from long distance pion dynamics. Our findings indicate that
dipole extrapolation methods currently used in lattice QCD analyses of baryon
form factors are not applicable for the chiral extrapolation of $N\Delta$
quadrupole transition form factors.


title: Superfluidity within Exact Renormalisation Group approach

abstract:
  The application of the exact renormalisation group to a many-fermion system
with a short-range attractive force is studied. We assume a simple ansatz for
the effective action with effective bosons, describing pairing effects and
derive a set of approximate flow equations for the effective coupling including
boson and fermionic fluctuations.
  The phase transition to a phase with broken symmetry is found at a critical
value of the running scale. The mean-field results are recovered if boson-loop
effects are omitted. The calculations with two different forms of the regulator
was shown to lead to similar results.


title: Back-to-Back Correlations for Finite Expanding Fireballs

abstract:
  Back-to-Back Correlations of particle-antiparticle pairs are related to the
in-medium mass-modification and squeezing of the quanta involved. They are
predicted to appear when hot and dense hadronic matter is formed in high energy
nucleus-nucleus collisions. The survival and magnitude of the Back-to-Back
Correlations of boson-antiboson pairs generated by in-medium mass modifications
are studied here in the case of a thermalized, finite-sized, spherically
symmetric expanding medium. We show that the BBC signal indeed survives the
finite-time emission, as well as the expansion and flow effects, with
sufficient intensity to be observed at RHIC.


title:
Variational Monte Carlo study of pentaquark states in a correlated quark
  model

abstract:
  Accurate numerical solution of the five-body Schrodinger equation is effected
via variational Monte Carlo in a correlated quark model. The spectrum is
assumed to exhibit a narrow resonance with strangeness S=+1. A fully
antisymmetrized and pair-correlated five-quark wave function is obtained for
the assumed non-relativistic Hamiltonian which has spin, isospin, and color
dependent pair interactions and many-body confining terms which are fixed by
the non-exotic spectra. Gauge field dynamics are modeled via flux tube exchange
factors. The energy determined for the ground states with spin-parity 1/2-
(1/2+) is 2.22 GeV (2.50 GeV). A lower energy negative parity state is
consistent with recent lattice results.


title: Density-Dependent Relativistic Hartree-Fock Approach

abstract:
  A new relativistic Hartree-Fock approach with density-dependent $\sigma$,
$\omega$, $\rho$ and $\pi$ meson-nucleon couplings for finite nuclei and
nuclear matter is presented. Good description for finite nuclei and nuclear
matter is achieved with a number of adjustable parameters comparable to that of
the relativistic mean field approach. With the Fock terms, the contribution of
the $\pi$-meson is included and the description for the nucleon effective mass
and its isospin and energy dependence is improved.


title: Constrained relativistic mean field approach with fixed configurations

abstract:
  A diabatic (configuration-fixed) constrained approach to calculate the
potential energy surface (PES) of the nucleus is developed in the relativistic
mean field model. {As an example}, the potential energy surfaces of $^{208}$Pb
obtained from both adiabatic and diabatic constrained approaches are
investigated and compared. {It is shown that} the diabatic constrained approach
enables one to decompose the segmented PES obtained in usual adiabatic
approaches into separate parts uniquely characterized by different
configurations, {to follow the evolution of single-particle orbits till very
deformed region}, and to obtain several well defined deformed excited states
which can hardly be expected from the adiabatic PES's.


title:
Strangeness dynamics in heavy-ion collisions: the K/pi ratios and the
  lifetime of a fireball

abstract:
  We propose a non-equilibrium, hadronic kinetic model for describing the
relative abundance of strange particles in ultra-relativistic heavy-ion
collisions. The energy dependence of the multiplicity ratios of charged kaons
and lambdas to pions are studied in detail. The pronounced peak in positively
charged K/pi is conjectured to be due to the decreasing lifetime of a fireball
with an increase in beam energy above 30 AGeV. Such a behaviour may be the
consequence of a stronger stopping at lower beam energies. We study the
dependence of the multiplicity ratios on energy and baryon density of the
fireball and its total lifetime.


title: Transition Radiation in QCD matter

abstract:
  In ultrarelativistic heavy ion collisions a finite size QCD medium is
created. In this paper we compute radiative energy loss to zeroth order in
opacity by taking into account finite size effects. Transition radiation occurs
on the boundary between the finite size medium and the vacuum, and we show that
it lowers the difference between medium and vacuum zeroth order radiative
energy loss relative to the infinite size medium case. Further, in all previous
computations of light parton radiation to zeroth order in opacity, there was a
divergence caused by the fact that the energy loss is infinite in the vacuum
and finite in the QCD medium. We show that this infinite discontinuity is
naturally regulated by including the transition radiation.


title: Evidence for two Lambda(1405) resonance states

abstract:
  The $K^- p \to \pi^0 \pi^0 \Sigma^0$ reaction is studied within a chiral
unitary model. The distribution of $\pi^0 \Sigma^0$ states forming the
$\Lambda(1405)$ shows, in agreement with a recent experiment, a peak at 1420
MeV and a relatively narrow width of $\Gamma = 38$ MeV. We use these data in
combination with those of the $\pi^- p \to K^0 \pi \Sigma$ reaction and
elements of chiral unitary theory to prove that there are two $\Lambda(1405)$
states instead of one as so far assumed.


title: Phase Transitions: Summary of Discussion Session II of Camerino 2005

abstract:
  A brief report of the topics which received attention during the discussion
session II of the International Workshop on Symmetries and Low-Energy Phase
Transitions in Nuclear-Structure Physics, held in Camerino on 9-11 October
2005, is given. These include special solutions of the Bohr Hamiltonian for
various potentials, the study of triaxial shapes and of degrees of freedom
other than the quadrupole one (octupole, scissors), as well as the search for
experimental manifestations of the critical point symmetries E(5) and X(5), and
of the recently proposed critical point supersymmetry E(5/4).


title:
Baryonic Resonances from the Interactions of the Baryon Decuplet and
  Meson Octet

abstract:
  We study $S$-wave interactions of the baryon decuplet with the octet of
pseudoscalar mesons using the lowest order chiral Lagrangian. We find two bound
states in the SU(3) limit corresponding to the octet and decuplet
representations. These are found to split into eight different trajectories in
the complex plane when the SU(3) symmetry is broken gradually. Finally, we are
able to provide a reasonable description for a good number of 4-star
${{3/2}}^-$ resonances listed by the Particle Data Group. In particular, the
$\Xi(1820)$, the $\Lambda(1520)$ and the $\Sigma(1670)$ states are well
reproduced. We predict a few other resonances and also evaluate the couplings
of the observed resonances to the various channels from the residues at the
poles of the scattering matrix from where partial decay widths into different
channels can be evaluated.


title:
Isovector Channel Role of Relativistic Mean Field Models in the Neutrino
  Mean Free Path

abstract:
  An improvement in the treatment of the isovector channel of relativistic mean
field (RMF) models based on effective field theory (E-RMF) is suggested, by
adding an isovector scalar (delta) meson and using a similar procedure to the
one used by Horowitz and Piekarewicz to adjust the isovector-vector channel in
order to achieve a softer density dependent symmetry energy of the nuclear
matter at high density. Their effects on the equation of state (EOS) at high
density and on the neutrino mean free path (NMFP) in neutron stars are
discussed.


title: Isobar Model for Photoproduction of K+Sigma0 and K0Sigma+ on the Proton

abstract:
  Kaon photoproductions on the proton gamma p --> K+Sigma0 and gamma p -->
K0Sigma+ have been simultaneously analyzed by using isobar models and new
SAPHIR data. The result shows that isobar models such as KAON MAID require more
resonances in order to explain the data.


title: Relativistic Mean Field Models at High Densities

abstract:
  The effects of vector-isovector terms predicted by relativistic mean field
models based on effective field theory on the equation of state and the
neutrino mean free path in neutron stars have been studied. Using a procedure
similar to Ref. [1] in treating the isovector sector, a parameter set (G2*)
that predicts a much smaller proton fraction than the standard one (G2) can be
obtained. We found that the G2* has a softer equation of state compared to the
G2 at higher densities and the disappearance of the anomalous behavior of the
neutrino mean free path in neutron star does not depend on the proton fraction.


title: Angular distributions of scattered excited muonic hydrogen atoms

abstract:
  Differential cross sections of the Coulomb deexcitation in the collisions of
excited muonic hydrogen with the hydrogen atom have been studied for the first
time. In the framework of the fully quantum-mechanical close-coupling approach
both the differential cross sections for the $nl \to n'l'$ transitions and
$l$-averaged differential cross sections have been calculated for exotic atom
in the initial states with the principle quantum number $n=2 - 6$ at relative
motion energies $E_{\rm {cm}}=0.01 - 15$ eV and at scattering angles
$\theta_{\rm {cm}}=0 - 180^{\circ}$. The vacuum polarization shifts of the
$ns$-states are taken into account. The calculated in the same approach
differential cross sections of the elastic and Stark scattering are also
presented. The main features of the calculated differential cross sections are
discussed and a strong anisotropy of cross sections for the Coulomb
deexcitation is predicted.


title: Solitons in relativistic mean field models

abstract:
  Assuming that the nucleus can be treated as a perfect fluid we study the
conditions for the formation and propagation of Korteweg-de Vries (KdV)
solitons in nuclear matter. The KdV equation is obtained from the Euler and
continuity equations in nonrelativistic hydrodynamics. The existence of these
solitons depends on the nuclear equation of state, which, in our approach,
comes from well known relativistic mean field models. We reexamine early works
on nuclear solitons, replacing the old equations of state by new ones, based on
QHD and on its variants. Our analysis suggests that KdV solitons may indeed be
formed in the nucleus with a width which, in some cases, can be smaller than
one fermi.


title:
Neutron star cooling constraints for color superconductivity in hybrid
  stars

abstract:
  We apply the recently developed Log N - Log S test of compact star cooling
theories for the first time to hybrid stars with a color superconducting quark
matter core. While there is not yet a microscopically founded superconducting
quark matter phase which would fulfill constraints from cooling phenomenology,
we explore the hypothetical 2SC+X phase and show that the magnitude and
density-dependence of the X-gap can be chosen to satisfy a set of tests:
temperature - age (T - t), the brightness constraint, Log N - Log S, and the
mass spectrum constraint. The latter test appears as a new conjecture from the
present investigation.


title:
Empirical Determination of Threshold Partial Wave Amplitudes in $p p \to
  p p \omega$

abstract:
  Using the model independent irreducible tensor approach to $\omega$
production in $pp$ collisions, we show theoretically that, it is advantageous
to measure experimentally the polarization of $\omega$, in addition to the
proposed experimental study employing a polarized beam and a polarized target.


title: Hadrons in compact stars

abstract:
  We discuss $\beta$-equilibrated and charge neutral matter involving hyperons
and $\bar K$ condensates within relativistic models. It is observed that
populations of baryons are strongly affected by the presence of antikaon
condensates. Also, the equation of state including $\bar K$ condensates becomes
softer resulting in a smaller maximum mass neutron star.


title: The nuclear matter phase diagram, multifragmentation, Zipf's law

abstract:
  Some of the progress in determining the phase boundaries of the nuclear phase
diagram, the location of the critical point of the nuclear fragmentation phase
transition, and the values of the critical exponents of this transition is
reviewed. The recently postulated connection of the size of the largest
fragments as a function of their rank with Zipf's law known from linguistics is
discussed, and an exact formula is derived. We show that Zipf's law is not
strictly observed in nuclear fragmentation, but that one can derive useful
approximations.


title: The strangeness form factors of the proton

abstract:
  The present empirical information on the strangeness form factors indicates
that the corresponding $uuds\bar s$ component in the proton is such that the
$uuds$ subsystem has the flavor spin symmetry $[4]_{FS}[22]_F[22]_S$ and mixed
orbital symmetry $[31]_X$. This $uuds\bar s$ configuration leads to the
empirical signs of all the form factors $G_E^s$, $G_M^s$ and $G_A^s$. An
analysis with simple quark model wave functions for the preferred configuration
shows that the qualitative features of the empirical strangeness form factors
may be described with a $\sim$ 15% admixture of $uuds\bar s$ with a compact
wave function in the proton. Transition matrix elements between the $uud$ and
the $uuds\bar s$ components give significant contributions.


title:
J/\psi$ Gluonic Dissociation Revisited : III. Effects of Transverse
  Hydrodynamic Flow

abstract:
  In a recent paper [Eur. Phys. J {\bf C 44}, 567 (2005)] we developed a very
general formulation to take into account explicitly the effects of hydrodynamic
flow profile on the gluonic breakup of $J/\psi$'s produced in an equilibrating
quark-gluon plasma. Here we apply that formulation to the case when the medium
is undergoing cylindrically symmetric {\it transverse} expansion starting from
RHIC or LHC initial conditions. Our algebraic and numerical estimates
demonstrate that the transverse expansion causes enhancement of local gluon
number density $\ng$, affects the $\pt$-dependence of the average dissociation
rate $\tilg$ through a partial-wave interference mechanism, and makes the
survival probability $\spt$ to change with $\pt$ very slowly. Compared to the
previous case of longitudinal expansion the new graph of $\spt$ is pushed up at
LHC, but develops a rich structure at RHIC, due to a competition between the
transverse catch-up time and plasma lifetime.


title: Hadronization in nuclear DIS and ultra-relativistic HIC

abstract:
  We present a transport theoretical analysis of hadron attenuation in deep
inelastic lepton scattering (DIS) off complex nuclei in the kinematic regime of
the HERMES experiment. The HERMES data indicate the presence of strong
prehadronic final state interactions shortly after the elementary
lepton-nucleon interaction. The contribution of such (pre-)hadronic final state
interactions to the observed jet quenching in ultra-relaticistic heavy ion
collisions (HIC) at RHIC is estimated under the assumption that a similar
space-time picture for hadronization also holds in a hot hadronic medium. Our
results show that an additional mechanism for jet quenching must be at work for
most central collisions.


title: Many-body nuclear Hamiltonian: Ab exitu approach

abstract:
  Fully-microscopic No-core Shell Model (NCSM) calculations of all stable $s$
and $p$ shell nuclei are used to determine realistic $NN$ interaction JISP16
describing not only the two-nucleon data but the binding energies and spectra
of nuclei with $A\leq 16$ as well. The JISP16 interaction, providing rapid
convergence of the NCSM calculations, is obtained in an {\em ab exitu} approach
by phase-equivalent transformations of the JISP6 $NN$ interaction.


title:
On the Experimental Identification of Spin-Parities and Single-Particle
  Configurations in $^{257}$No and Its $\alpha$-Decay Daughter $^{253}$Fm

abstract:
  Recently measured lifetimes of the favored $\alpha$ decays from $^{257}$No
have been calculated using the quantum mechanical tunneling within WKB
approximation using microscopic nuclear potentials. Results obtained assuming
previously assigned (ambiguous) parent spin of $\frac{7^+}{2}$ and newly
assigned configuration $\frac{3^+}{2}$ [622] have been compared. Hindrance
factors for the favored decays have also been compared with the calculated
hindrances using higher angular momenta transfers. Although the calculations
substantiate the findings, yet it makes the spin-parity assignment of
$\frac{3^+}{2}$ for the ground state of $^{257}$No less definite.


title: Scattering processes in antiprotonic hydrogen - hydrogen atom collisions

abstract:
  The elastic scattering, Stark transitions and Coulomb deexcitation of excited
antiprotonic hydrogen atom in collisions with hydrogenic atom have been studied
in the framework of the fully quantum-mechanical close-coupling method for the
first time. The total cross sections $\sigma_{nl \to n'l'}(E)$ and averaged on
the initial angular momentum $l$ cross sections $\sigma_{n\to n'}(E)$ have been
calculated for the initial states of $(\bar{p}p)_{n}$ atoms with the principal
quantum number $n=3 - 14 $ and at the relative energies $E=0.05 - 50$ eV. The
energy shifts of the $ns$ states due to the strong interaction and relativistic
effects are taken into account. Some of our results are compared with the
semiclassical calculations.


title: $\Lambda(1520)$ at finite density

abstract:
  We study the decay channels of the $\Lambda(1520)$ in a nuclear medium and
find a sizable change - of the order of factor five - of the width of this
hyperon at normal nuclear matter density. The mass shift of the $\Lambda(1520)$
is moderate.


title: Nuclei from QCD : Strategy, Challenges and Status

abstract:
  I describe progress that is being made toward calculating the properties and
interactions of nuclei from QCD.


title:
Neutrino Electromagnetic Form Factors Effect on the Neutrino Cross
  Section in Dense Matter

abstract:
  The sensitivity of the differential cross section of the interaction between
neutrino-electron with dense matter to the possibly nonzero neutrino
electromagnetic properties has been investigated. Here, the relativistic mean
field model inspired by effective field theory has been used to describe non
strange dense matter, both with and without the neutrino trapping. We have
found that the cross section becomes more sensitive to the constituent
distribution of the matter, once electromagnetic properties of the neutrino are
taken into account. The effects of electromagnetic properties of neutrino on
the cross section become more significant for the neutrino magnetic moment
mu_nu > 10^{-10} mu_B and for the neutrino charge radius R > 10^{-5} MeV^{-1}.


title: Baryon-meson interactions in chiral quark model

abstract:
  Using the resonating group method (RGM), we dynamically study the
baryon-meson interactions in chiral quark model. Some interesting results are
obtained: (1) The Sigma K state has an attractive interaction, which
consequently results in a Sigma K quasibound state. When the channel coupling
of Sigma K and Lambda K is considered, a sharp resonance appears between the
thresholds of these two channels. (2) The interaction of Delta K state with
isospin I=1 is attractive, which can make for a Delta K quasibound state. (3)
When the coupling to the Lambda K* channel is considered, the N phi is found to
be a quasibound state in the extended chiral SU(3) quark model with several MeV
binding energy. (4) The calculated S-, P-, D-, and F-wave KN phase shifts
achieve a considerable improvement in not only the signs but also the
magnitudes in comparison with other's previous quark model study.


title:
High-energy direct reactions with exotic nuclei and low-energy nuclear
  astrophysics

abstract:
  Indirect methods in nuclear astrophysics are discussed. Recent work on
Coulomb dissociation and an effective-range theory of low-lying electromagnetic
strength of halo nuclei is presented. Coulomb dissociation of a halo nucleus
bound by a zero-range potential is proposed as a homework problem (for further
references see G. Baur and S. Typel, nucl-th/0504068). It is pointed out that
the Trojan-Horse method (G. Baur, F. R\"{o}sel, D. Trautmann and R. Shyam,
Phys. Rep. 111 (1984) 333) is a suitable tool to investigate subthreshold
resonances.


title:
Beyond the relativistic mean-field approximation: configuration mixing
  of angular momentum projected wave functions

abstract:
  We report the first study of restoration of rotational symmetry and
fluctuations of the quadrupole deformation in the framework of relativistic
mean-field models. A model is developed which uses the generator coordinate
method to perform configuration mixing calculations of angular momentum
projected wave functions, calculated in a relativistic point-coupling model.
The geometry is restricted to axially symmetric shapes, and the intrinsic wave
functions are generated from the solutions of the constrained relativistic
mean-field + BCS equations in an axially deformed oscillator basis. A number of
illustrative calculations are performed for the nuclei 194Hg and 32Mg, in
comparison with results obtained in non-relativistic models based on Skyrme and
Gogny effective interactions.


title: Perfect fluidity of sQGP core and dissipative hadronic corona

abstract:
  We can establish a new picture, the perfect fluid sQGP core and the
dissipative hadronic corona, of the space-time evolution of produced matter in
relativistic heavy ion collisions at RHIC. It is also shown that the picture
works well also in the forward rapidity region through an analysis based on a
new class of the hydro-kinetic model and is a manifestation of deconfinement.


title: A Novel Nuclear Model for Double Beta Decay

abstract:
  The possibility of applying the Quasiparticle Tamm-Dancoff Approximation
(QTDA) to describe the nuclear double beta decay is explored. Several serious
inconveniences found in the Quasiparticle Random Phase Approximation (QRPA),
such as: i) the extreme sensitivity of the $2\nu\beta \beta$ decay amplitudes
${\cal M}_{2{\nu}}$ on the residual interaction in the particle-particle
channel, ii) the ambiguity in treating the intermediate states, and iii) the
need for performing a second charge-conserving QRPA to describe the
$\beta\beta$-decays to the excited final states, are not present in the QTDA.
Also, the QTDA allows for explicit evaluation of energy distributions of the
double-charge-exchange transition strengths and of their sum rules, and can be
straightforwardly applied to single- and double-closed shell nuclei. As an
example, the $^{48}$Ca$\go^{48}$Ti decay is discussed within the $1fp$-shell in
the particle-hole limit of the QTDA. The general
[$(1,1)$-Pad\'e-approximant-like] behavior of the $2\nu\beta \beta$-decay
amplitude in the plain QRPA as well as within its different variations is
briefly reviewed.


title:
Signature inversion -- manifestation of drift of the rotational axis in
  triaxial nuclei

abstract:
  A possible scheme of realizing shell model calculations for heavy nuclei is
based on a deformed basis and the projection technique. Here we present a new
development for odd-odd nuclei, in which one starts with triaxially-deformed
multi-quasi-particle configurations, builds the shell-model space through exact
three-dimensional angular-momentum-projection, and diagonalizes a two-body
Hamiltonian in this space. The model enables us to study the old problem of
signature inversion from a different view. With an excellent reproduction of
the experimental data in the mass-130 region, the results tend to interpret the
phenomenon as a manifestation of dynamical drift of the rotational axis with
presence of axial asymmetry in these nuclei.


title: $\bar K$ nuclear bound states in a dynamical model

abstract:
  A comprehensive data base of K- atom level shifts and widths is re-analyzed
in order to study the density dependence of the Kbar-nuclear optical potential.
Significant departure from a t*rho form is found only for nuclear densities
about and less than 20% of nuclear-matter density, and extrapolation to
nuclear-matter density yields an attractive potential, about 170 MeV deep.
Partial restoration of chiral symmetry compatible with pionic atoms and
low-energy pion-nuclear data plays no role at the relevant low-density regime,
but this effect is not ruled out at high densities. Kbar-nuclear bound states
are generated across the periodic table self consistently, using a relativistic
mean-field model Lagrangian which couples the Kbar to the scalar and vector
meson fields mediating the nuclear interactions. The reduced phase space
available for Kbar absorption from these bound states is taken into account by
adding an energy-dependent imaginary term which underlies the corresponding
Kbar-nuclear level widths, with a strength required by fits to the atomic data.
Substantial polarization of the core nucleus is found for light nuclei, and the
binding energies and widths calculated in this dynamical model differ
appreciably from those calculated for a static nucleus. A wide range of binding
energies is spanned by varying the Kbar couplings to the meson fields. Our
calculations provide a lower limit of Gamma(Kbar) = 50 +/- 10 MeV on the width
of nuclear bound states for Kbar binding energy in the range B(Kbar) = 100 -
200 MeV. Comments are made on the interpretation of the FINUDA experiment at
DAFNE, Frascati, which claimed evidence for deeply bound (K- pp) states in
light nuclei.


title:
Can a Hagedorn system have a temperature other than $T_C$ or can a
  thermostat have a temperature other than its own?

abstract:
  This is a note intended to complement our paper (nucl-th/0504010) and
addressed to the attention of QGP workers interested in bag models, Hagedorn
spectra, and the like. It tries to show that with a Hagedorn-like experimental
spectrum the partition function can not be calculated and that a canonical
description derived for the microcanonical ensemble exists only for a single,
fixed temperature.


title: Structure and decay width of \Theta^+ in a one-gluon exchange model

abstract:
  The mass and decay width of the $\Theta^+(1540)$ with isospin 0 are
investigated in a constituent quark model comprising $uudd\bar{s}$ quarks. The
resonance state for the $\Theta^+$ is identified as a stable solution in
correlated basis calculations. With the use of a one-gluon exchange quark-quark
interaction, the mass is calculated to be larger than 2 GeV, increasing in
order of the spin-parity, ${1/2}^-, {3/2}^-$ and ${1/2}^+ ({3/2}^+)$, and only
the ${3/2}^-$ state has a small width to the $nK^{*+}$ decay. If the calculated
mass is shifted to around 100 MeV above the $N+K$ threshold, the
$\Theta^+(1540)$ is possibly ${1/2}^+ ({3/2}^+)$ or ${3/2}^-$, though in the
latter case it cannot decay to the $nK^{+}$ channel. In addition it is
conjectured that other pentaquark state with different spin-parity exists below
the $\Theta^+(1540)$. The structure of the $\Theta^+$ is discussed through the
densities and two-particle correlation functions of the quarks and through the
wave function decomposition to a baryon-meson model and a diquark-pair model.


title:
Di-hadron azimuthal correlation and Mach-like cone structure in
  parton/hadron transport model

abstract:
  In the framework of a multi-phase transport model (AMPT) with both partonic
and hadronic interactions, azimuthal correlations between trigger particles and
associated scattering particles have been studied by the mixing-event
technique. The momentum ranges of these particles are $3< p^{trig}_T< 6$
GeV/$c$ and $0.15< p_{T}^{assoc} < 3$ GeV/$c$ (soft), or $2.5<p^{trig}_T<$ 4
GeV/$c$ and $1< p_{T}^{assoc} < 2.5$ GeV/$c$ (hard) in Au + Au collisions at
$\sqrt{s_{NN}}$ = 200 GeV. A Mach-like structure has been observed in
correlation functions for central collisions. By comparing scenarios with and
without parton cascade and hadronic rescattering, we show that both partonic
and hadronic dynamical mechanisms contribute to the Mach-like structure of the
associated particle azimuthal correlations. The contribution of hadronic
dynamical process can not be ignored in the emergence of Mach-like correlations
of the soft scattered associated hadrons. However, hadronic rescattering alone
cannot reproduce experimental amplitude of Mach-like cone on away-side, and the
parton cascade process is essential to describe experimental amplitude of
Mach-like cone on away-side. In addition, both the associated multiplicity and
the sum of $p_{T}$ decrease, whileas the $<p_{T}>$ increases, with the impact
parameter in the AMPT model including partonic dynamics from string melting
scenario.


title: A critical view on the deeply bound K^- pp system

abstract:
  We briefly review the situation around the claimed deeply bound K^- states in
different recent experiments and concentrate particularly on the state K^- pp
advocated by the FINUDA collaboration in nuclear K^- absorption. We perform a
theoretical simulation of the process and show that the peak in the Lambda p
spectrum that was interpreted as a deep K^- pp bound state corresponds mostly
to the process K^- p p --> Lambda p followed by final state interactions of the
produced particles with the daughter nucleus.


title:
Elastic and dynamic form factors of an atomic nucleus in the shell model
  with correction for the center-of-mass motion

abstract:
  Analytical expressions for the elastic and dynamic form factors (FFs) are
derived in the shell model (SM) with a potential well of finite depth. The
consideration takes into account the motion of the target-nucleus center of
mass (CM). Explanation is suggested for a simultaneous shrinking of the density
and momentum distributions of nucleons in nuclei. The convenient working
formulae are given to handle the expectation values of relevant multiplicative
operators in case of the 1s-1p shell nuclei.


title:
Cooperative Enhancement Mechanisms of Low Energy Nuclear Reactions Using
  Superlow Energy External Fields

abstract:
  We proposed a new mechanism of LENR: cooperative processes in whole system -
nuclei+atoms+condensed matter can occur at smaller threshold energies then
corresponding ones on free constituents. The cooperative processes can be
induced and enhanced by low energy external fields. The excess heat is the
emission of internal energy and transmutations at LENR are the result of
redistribution inner energy of whole system.


title: $\pi^+\pi^-$ Emission from Coherent $\rho^0$ Propagation in Nuclei

abstract:
  Cross sections for the $\pi^+\pi^-$ events arising due to the decay of
$\rho^0$ meson have been calculated. This rho meson is considered to produce
coherently in the $(p,p^\prime)$ reaction on a nucleus. The distorted wave
functions for the continuum particles and the rho meson propagator are
described by the eikonal form. The sensitivity of the cross section on the pion
emission angle as well as on the beam energy has been investigated. The cross
sections for the $\rho^0$ decaying inside and outside the nucleus are compared.
In addition, the coherent and incoherent contributions to the cross section due
to $\rho^0$ inside and outside decay amplitudes are presented. The initial and
final state interactions for this reaction have been studied. The nuclear
medium effect on the $\rho^0$ propagation through the nucleus is also explored.


title: Molecular dynamics simulation of strongly coupled QCD plasmas

abstract:
  The properties of a strongly interacting quark plasma are investigated by
molecular dynamics method including non-abelian quark-quark potential. Our main
goal is to study the thermalization process in this system. We find an
interesting resonance-like behaviour: at a characteristic time close to the
inverse plasma frequency the quark plasma is heated up substantially via energy
transfer from quark potential energy into one particle kinetic energy. Color
rotation mechanism enhances the effectivity of this heating process, leading to
a very fast thermalization with high temperature.


title: The strength of nuclear shell effects at N=126 in the r-process region

abstract:
  We have investigated nuclear shell effects across the magic number N=126 in
the region of the r-process path. Microscopic calculations have been performed
using the relativistic Hartree-Bogoliubov approach within the framework of the
RMF theory for isotopic chains of rare-earth nuclei in the r-process region.
The Lagrangian model NL-SV1 with the inclusion of the vector self-coupling of
omega meson has been employed. The RMF results show that the shell effects at
N=126 remain strong and exhibit only a slight reduction in the strength in
going from the r-process path to the neutron drip line. This is in striking
contrast to a systematic weakening of the shell effects at N=82 in the
r-process region predicted earlier in the similar approach. In comparison the
shell effects with microscopic-macroscopic mass formulae show a near constancy
of shell gaps leading to strong shell effects in the region of r-process path
to the drip line. A recent analysis of solar-system r-process abundances in a
prompt supernova explosion model using various mass formulae including the
recently introduced mass tables based upon HFB approach shows that whilst mass
formulae with weak shell effects at N=126 give rise to a spread and an
overproduction of nuclides near the third abundance peak at A~190, mass tables
with droplet models showing stronger shell effects are able to reproduce the
abundance features near the third peak appropriately. In comparison, several
analyses of the second r-process peak at A~130 have required weakened shell
effects at N=82. Our predictions in the RMF theory with NL-SV1, which exhibit
weaker shell effects at N=82 and stronger one at N=126 in the r-process region,
support the conjecture that a different nature of the shell effects at the
magic numbers may be at play in r-process nucleosynthesis of heavy nuclei.


title:
7Be(p,gamma)8B S-factor from ab initio no-core shell model wave
  functions

abstract:
  Nuclear structure of 7Be, 8B and 7,8Li is studied within the ab initio
no-core shell model (NCSM). Starting from high-precision nucleon-nucleon (NN)
interactions, wave functions of 7Be and 8B bound states are obtained in basis
spaces up to 10 hbar Omega and used to calculate channel cluster form factors
(overlap integrals) of the 8B ground state with 7Be+p. Due to the use of the
harmonic oscillator (HO) basis, the overlap integrals have incorrect asymptotic
properties. We fix this problem in two alternative ways. First, by a
Woods-Saxon (WS) potential solution fit to the interior of the NCSM overlap
integrals. Second, by a direct matching with the Whittaker function. The
corrected overlap integrals are then used for the 7Be(p,gamma)8B S-factor
calculation. We study the convergence of the S-factor with respect to the NCSM
HO frequency and the model space size. Our S-factor results are in agreement
with recent direct measurement data. We also test the spectroscopic factors and
the corrected overlap integrals from the NCSM in describing the momentum
distributions in knockout reactions with 8B projectiles. A good agreement with
the available experimental data is also found, attesting the overall
consistency of the calculations.


title: Analysis of full-QCD and quenched-QCD lattice propagators

abstract:
  Recent lattice-QCD results for the dressed-gluon propagator are used within
the quark Dyson-Schwinger equation to determine the gluon-quark vertex dressing
necessary to reproduce the lattice-QCD results for the dressed-quark
propagator. Both quenched and full QCD lattice simulations, for a range of low
quark current masses, are analyzed. The chiral extrapolation is made through
this continuum DSE form. Resulting chiral and physical pion observables are
investigated.


title: Neutrino interactions with nucleons and nuclei at intermediate energies

abstract:
  We investigate neutrino-nucleus collisions at intermediate energies
incorporating quasielastic scattering and Delta(1232) excitation as elementary
processes, together with Fermi motion, Pauli blocking and mean-field potentials
in the nuclear medium. A full coupled-channel treatment of final state
interactions is achieved with a semiclassical BUU transport model. Results for
inclusive reactions and nucleon knockout are presented.


title: Properties of a protoneutron star in the Effective Field Theory

abstract:
  The complete form of the equation of state of strangeness rich proto-neutron
and neutron star matter has been obtained. The currently obtained lower value
of the Lambda Lambda potential at the level of 5 MeV permits the existence of
additional parameter set which reproduces the weaker Lambda Lambda interaction.
The effects of the strength of hyperon-hyperon interactions on the equations of
state constructed for the chosen parameter set have been analyzed. It has been
shown that replacing the strong Y-Y interaction model by the weak one
introduces large differences in the composition of a proto-neutron star matter
both in the strange and non-strange sectors. Also concentrations of neutrinos
have been significantly altered in proto-neutron star interiors. The performed
calculations have indicated that the change of the hyperon-hyperon coupling
constants affects the value of the proto-neutron star maximum mass.


title: The phases of strongly interacting matter in heavy ion collisions

abstract:
  In ultrarelativistic heavy ion collisions the produced high temperature, high
energy density state will cross different phases of the strongly interacting
matter. The original idea of quark-gluon plasma formation has been evolved and
the weakly interacting gaseous state of massless partons has been replaced by
the picture of strongly interacting massive constituent quarks. Experimental
results at SPS and RHIC supports this idea. We discuss the phases at LHC
energies.


title:
The $0^{+}\to 0^{+}$ positron double-$\beta$ decay with emission of two
  neutrinos in the nuclei $^{96}$Ru, $^{102}$Pd, $^{106}$Cd and $^{108}$Cd

abstract:
  Theoretical results for %the $0^{+}\to 0^{+}$ positron double-$\beta$ decay
with emission of two neutrinos in the nuclei $^{96}$Ru, $^{102}$Pd, $^{106}$Cd
and $^{108}$Cd are presented. The study employs the Hartree-Fock-Bogoliubov
model to obtain the wave functions of the parent and daughter nuclei, in
conjunction with the summation method to estimate the double beta decay nuclear
matrix elements. The reliability of the intrinsic wave functions of
$^{96,102}$Ru, $% ^{96}$Mo, $^{102,106,108}$Pd and $^{106,108}$Cd nuclei are
tested by comparing the theoretically calculated spectroscopic properties with
the available experimental data. Calculated half-lives $T_{1/2}^{2\nu}$ of $%
^{96}$Ru, $^{102}$Pd, $^{106}$Cd and $^{108}$Cd nuclei for 2$\nu $ $\beta
^{+}\beta ^{+}$, 2$\nu $ $\beta ^{+}EC$ and 2$\nu $ $ECEC$ modes are presented.
The effect of deformation on the nuclear transition matrix element $M_{2\nu}$
is also studied.


title: Schiff Theorem and the Electric Dipole Moments of Hydrogen-Like Atoms

abstract:
  The Schiff theorem is revisited in this work and the residual $P$- and
$T$-odd electron--nucleus interaction, after the shielding takes effect, is
completely specified. An application is made to the electric dipole moments of
hydrogen-like atoms, whose qualitative features and systematics have important
implication for realistic paramagnetic atoms.


title:
Collective multipole excitations based on correlated realistic
  nucleon-nucleon interactions

abstract:
  We investigate collective multipole excitations for closed shell nuclei from
16O to 208Pb using correlated realistic nucleon -nucleon interactions in the
framework of the random phase approximation (RPA). The dominant short-range
central and tensor correlations a re treated explicitly within the Unitary
Correlation Operator Method (UCOM), which provides a phase-shift equivalent
correlated interaction V_UCOM adapted to simple uncorrelated Hilbert spaces.
The same unitary transformation that defines the correlated interaction is used
to derive correlated transition operators. Using V_UCOM we solve the
Hartree-Fock problem and employ the single-particle state s as starting point
for the RPA. By construction, the UCOM-RPA is fully self-consistent, i.e. the
same correlated nucleon-nucleon interact ion is used in calculations of the HF
ground state and in the residual RPA interaction. Consequently, the spurious
state associated with t he center-of-mass motion is properly removed and the
sum-rules are exhausted within +-3%. The UCOM-RPA scheme results in a
collective character of giant monopole, dipole, and quadrupole resonances in
closed-shell nuclei across the nuclear chart. For the isoscalar giant monopole
resonance, the resonance energies are in agreement with experiment hinting at a
reasonable compressibility. However, in the 1- and 2+ channels the resonance
energies are overestimated due to missing long-range correlations and
three-body contributions.


title: Radiative decay of the Lambda(1520)

abstract:
  A recently developed non-perturbative chiral approach to dynamically generate
the (3/2^-) baryon resonances has been extended to investigate the radiative
decays Lambda^*(1520) --> gamma Lambda(1116) and Lambda^*(1520) --> gamma
Sigma^0(1193). We show that the Lambda^*(1520) decay into gamma Lambda is an
ideal test for the need of extra components of the resonance beyond those
provided by the chiral approach since the largest meson-baryon components give
no contribution to this decay. The case is different for gamma Sigma decay
where the theory agrees with experiment, though the large uncertainties of
these data call for more precise measurements.


title:
Probing the equation of state of neutron-rich matter with intermediate
  energy heavy-ion collisions

abstract:
  Nuclear reactions induced by stable and/or radioactive neutron-rich nuclei
provide the opportunity to pin down the equation of state of neutron-rich
matter, especially the density ($\rho$) dependence of its isospin-dependent
part, i.e., the nuclear symmetry energy $E_{\rm sym}$. A conservative
constraint, $32(\rho /\rho_{0})^{0.7} < E_{\rm sym}(\rho ) < 32(\rho /\rho
_{0})^{1.1}$, around the nuclear matter saturation density $\rho_0$ has
recently been obtained from the isospin diffusion data in intermediate energy
heavy-ion collisions. We review this exciting result and discuss its
consequences and implications on nuclear effective interactions, radii and
cooling mechanisms of neutron stars.


title:
Classical Strongly Coupled QGP I: The Model and Molecular Dynamics
  Simulations

abstract:
  We propose a model for the description of strongly interacting quarks and
gluon quasiparticles at $T=(1-3)T_c$, as a classical and nonrelativistic
colored Coulomb gas. The sign and strength of the inter-particle interactions
are fixed by the scalar product of their classical {\it color vectors} subject
to Wong's equations. The model displays a number of phases as the Coulomb
coupling is increased ranging from a gas, to a liquid, to a crystal with
antiferromagnetic-like color ordering. We analyze the model using Molecular
Dynamics (MD) simulations and discuss the density-density correlator in real
time. We extract pertinent decorrelation times, diffusion and viscosity
constants for all phases. The classical results when extrapolated to the sQGP
suggest that the phase is liquid-like, with a diffusion constant $D\approx
0.1/T$ and a bulk viscosity to entropy density ratio $\eta/s\approx 1/3$.


title:
Kaon condensation and composition of neutron star matter in modified
  quark-meson coupling model

abstract:
  We use the modified quark-meson coupling (MQMC) model to study the
composition profile of neutron star matter and compare the results with those
calculated by quantum hadrodynamics (QHD). Both MQMC and QHD model parameters
are adjusted to produce exactly the same saturation properties so that we can
investigate the model dependences of the matter composition at high densities.
We consider the possibility of deep kaon optical potential and find that the
composition of matter is very sensitive to the interaction strength of kaons
with matter. The onset densities of the kaon condensation are studied in detail
by varying the kaon optical potentials. We find that the MQMC model produces
the kaon condensation at lower densities than QHD. The presence of kaon
condensation changes drastically the population of octet baryons and leptons.
Once the kaon condensation takes place, the population of kaons builds up very
quickly, and kaons become the dominant component of the matter. We find that
the $\omega$-meson plays an important role in increasing the kaon population
and suppressing the hyperon population.


title: Full $fp$-shell study of even-even $^{48-56}$Ti isotopes

abstract:
  The level schemes and transition rates {\em B}({\em E}2;$\uparrow$) of
eve-even $^{48-56}$Ti isotopes were studied by performing large-scale shell
model calculations with FPD6 and GXPF1 effective interactions. Excellent
agreement were obtained by comparing the first 2$^{+}$ level for all isotopes
with the recently available experimental data, but studying the transition
strengths {\em B}({\em E}2; 0$^+_{g.s.} \to2^+_1$) for all Ti isotopes using
constant proton-neutron effective charges prove the limitations of the present
large-scale calculations to reproduce the experiment in detail.


title: Soft gluons are heavy and rowdy

abstract:
  We study dynamical mass generation in pure Yang-Mills theory and report on a
recently developed ansatz that exactly solves the tower of Dyson-Schwinger
equations in Landau gauge at low Euclidean momentum, featuring enhanced
gluon-gluon vertices, a finite ghost-gluon vertex in agreement with an old
argument of Taylor, and an IR suppressed gluon propagator. This ansatz
reinforces arguments in favor of the concept of a gluon mass gap at low
momentum (although the minimum of the gluon's dispersion relation is not at
zero momentum). As an application, we have computed the spectrum of oddballs,
three-gluon glueballs with negative parity and C-parity. The three body problem
is variationally solved employing the color density-density interaction of
Coulomb gauge QCD with a static Cornell potential. Like their even glueball
counterparts, oddballs fall on Regge trajectories with similar slope to the
pomeron. However their intercept at t=0 is smaller than the omega Regge
trajectory and therefore the odderon may only be visible in experimental
searches (for example at BNL) with higher -t than conducted to date at DESY.


title:
Relating Meson and Baryon Fragmentation Functions by Shower-Parton
  Recombination

abstract:
  We relate the fragmentation functions of partons into mesons and baryons in
the framework of recombination of shower partons. The results are in reasonable
agreement with the data. The implication is that the meson and baryon
fragmentation functions are not independent when hadronization of the shower
partons are taken into account. The conclusion therefore closes a conceptual
gap in the system of fragmentation functions whose $Q^2$ evolution has been
more extensively studied than their interrelationship.