title: Sigma Terms of Light-Quark Hadrons

abstract:
  A calculation of the current-quark mass dependence of hadron masses can help
in using observational data to place constraints on the variation of nature's
fundamental parameters. A hadron's sigma-term is a measure of this dependence.
The connection between a hadron's sigma-term and the Feynman-Hellmann theorem
is illustrated with an explicit calculation for the pion using a rainbow-ladder
truncation of the Dyson-Schwinger equations: in the vicinity of the chiral
limit sigma_pi = m_pi/2. This truncation also provides a decent estimate of
sigma_rho because the two dominant self-energy corrections to the rho-meson's
mass largely cancel in their contribution to sigma_rho. The truncation is less
accurate for the omega, however, because there is little to compete with an
omega->rho+pi self-energy contribution that magnifies the value of sigma_omega
by ~25%. A Poincare' covariant Faddeev equation, which describes baryons as
composites of confined-quarks and -nonpointlike-diquarks, is solved to obtain
the current-quark mass dependence of the masses of the nucleon and Delta, and
thereby sigma_N and sigma_Delta. This "quark-core" piece is augmented by the
"pion cloud" contribution, which is positive. The analysis yields sigma_N~60MeV
and sigma_Delta~50MeV.


title:
Analysis of zero-frequency solutions of the pion dispersion equation in
  nuclear matter

abstract:
  In this paper we consider instability of nuclear matter which takes place
when the frequencies of the collective excitations turn to zero. We investigate
collective excitations with pion quantum numbers J^\pi=0^-. We study the
dependence of zero-frequency solutions of the pion dispersion equation on the
value of the spin-isospin quasiparticle interaction G'. The solutions of the
pion dispersion equation describe the different types of the excitations in the
matter, \omega_i(k). At the critical density \rho=\rho_c one of solutions of
the definite type turns to zero: \omega_{i0}(k_c)=0. When \rho>\rho_c, the
excitations \omega_{i0}(k) become amplified. It is shown that there is such a
"transitional" value of G'=G'_{tr} that for G'<G'_{tr} the zero-frequency
solutions belong to the type \omega_{sd} while for G'>G'_{tr} they pertain to
the type \omega_c. The solutions of the type \omega_{sd} correspond to
instability to small density fluctuations of the nuclear matter at G'\le -1. On
the other hand, \omega_c is responsible for the "pion condensation" at
G'\approx 2. For the stable nuclear matter the branches of solutions
\omega_{sd}(k) and \omega_c(k) are located on the unphysical sheets of the
complex plane of frequency.


title: e+e- pair production from nucleon targets in the resonance region

abstract:
  We discuss two processes, the $\pi N \to e^+e^- N$ and the $\gamma N \to
e^+e^- N$ reactions, below and close to the vector meson production threshold
($1.40<\sqrt s <1.75$ GeV). The aim is to gain understanding of the coupling of
vector fields (associated with $\rho^0$- and $\omega$-mesons) to low-lying
baryon resonances. These couplings are not well-known and important for baryon
structure studies and for dynamical descriptions of vector meson propagation in
the nuclear medium. The $e^+e^-$ pair production amplitudes are determined by
the $\pi N \to \rho^0 N$, $\pi N \to \omega N$, $\gamma N\to \rho^0 N$ and
$\gamma N \to \omega N$ amplitudes supplemented by the Vector Meson Dominance
assumption. The vector meson production amplitudes are calculated consistently
using a relativistic and unitary coupled-channel approach to meson-nucleon
scattering. We display results showing the importance of the quantum
interference between $\rho^0$- and $\omega$-mesons in the $e^+e^-$ channel to
unravel the strength of the coupling of $\rho^0$- and $\omega$-mesons to
specific baryon excitations. The $\pi N \to e^+e^-
  N$ and $\gamma N \to e^+e^- N$ reactions underlie the more complex $\pi A \to
e^+e^- X$ and $\gamma A \to e^+e^- X$ nuclear processes whose measurement is
planned at GSI (with the HADES detector) and under analysis at JLab (with the
CLAS detector).


title: Attenuation of phi mesons in gamma A reactions

abstract:
  We present a theoretical analysis of inclusive photoproduction of phi mesons
in nuclei. In particular the dependence of the total phi meson yield on the
target mass number is investigated. The calculations are done using the
semi-classical BUU transport approach that combines the initial state
interaction of the incoming photon with the coupled-channel dynamics of the
final state particles. The conditions of the calculations are chosen such as to
match the set up of a recent experiment performed at SPring8/Osaka. Whereas the
observables prove to be rather sensitive to the phi self energy in the medium,
the attribution of deviations from the standard scenario to a particular
in-medium effect seems to be impossible.


title:
A Realistic Calculation of the Effects of Nucleon-Nucleon Correlations
  in High-Energy Scattering Processes Off Nuclei

abstract:
  A new linked cluster expansion for the calculation of ground state
observables of complex nuclei with realistic interactions has been developed
[1-3]; using the V8' potential [4] the ground state energy, density and
momentum distribution of complex nuclei have been calculated and found to be in
good agreement with the results of [5], obtained within the Fermi Hyper Netted
Chain, and Variational Monte Carlo [6] approaches. Using the same cluster
expansion, with wave function and correlations Realistic Calculation of the
Effects of Nucleon-Nucleon Correlations in High-Energy Scattering Processes Off
Nuclei parameters fixed from the calculation of the ground-state observables,
the semi-inclusive reaction of type A(e,e'p)X has been calculated taking final
state interaction effects into account within a Glauber type calculation as in
Ref. [7]; the comparison between the resulting distorted and undistorted
momentum distributions provides an estimate of the transparency of the nuclear
medium to the propagation of the hit proton. The effect of color transparency
has also been considered within the approach of [8,9]; it is shown that at high
values of Q^2 finite formation time effects strongly reduce the final state
interaction, consistently with the idea of a reduced interaction of the hadron
produced inside the nucleus [10]. The total neutron-nucleus cross section at
high energies has also been calculated [11] by considering the effects of
nucleon-nucleon correlations, which are found to increase the cross section by
about 10% in disagreement with the experimental data. The inclusion of
inelastic shadowing effects of Refs. [12,13] decreases back the cross section,
leading to a good agreement between experimental data and theoretical
calculations.


title: Modern optical potentials and the role of nuclear structure

abstract:
  Microscopic descriptions of exotic nuclei are the subject of much
experimental and theoretical effort. Not only are such important in their own
right but are also necessary for applications in nuclear astrophysics.
Evaluations of model wave functions may be done with analyses of elastic and
inelastic scattering from hydrogen. Those require a realistic model of
nucleon-nucleus scattering as scattering from hydrogen translates to proton
scattering in the inverse kinematics. The Melbourne g-folding model for
intermediate energy is presented along with various examples. Implications for
existing and future experimental and theoretical work are discussed.


title: Statistical description of nuclear break-up

abstract:
  We present an overview of concepts and results obtained with statistical
models in study of nuclear multifragmentation. Conceptual differences between
statistical and dynamical approaches, and selection of experimental observables
for identification of these processes, are outlined. New and perspective
developments, like inclusion of in-medium modifications of the properties of
hot primary fragments, are discussed. We list important applications of
statistical multifragmentation in other fields of research.


title: Alpha-nucleus potential for alpha-decay and sub-barrier fusion

abstract:
  The set of parameters for alpha-nucleus potential is derived by using the
data for both the alpha-decay half-lives and the fusion cross-sections around
the barrier for reactions alpha+40Ca, alpha+59Co, alpha+208Pb. The alpha-decay
half-lives are obtained in the framework of a cluster model using the WKB
approximation. The evaluated alpha-decay half-lives and the fusion
cross-sections agreed well with the data. Fusion reactions between
alpha-particle and heavy nuclei can be used for both the formation of very
heavy nuclei and spectroscopic studies of the formed compound nuclei.


title: Heavy Ion e+ e- Pairs to All Orders in Z alpha

abstract:
  The heavy ion cross section for continuum e+ e- pair production has been
calculated to all orders in Z alpha. Comparison is made with available CERN SPS
and RHIC STAR data. Computed cross sections are found to be reduced from
perturbation theory with increasing charge of the colliding heavy ions and for
all energy and momentum regions investigated. Au or Pb total cross sections are
reduced by 28% (SPS), 17% (RHIC),and 11% (LHC). For very high energy (E_e+,
E_e- > 3 GeV) forward pairs at LHC the reduction from perturbation theory is a
bit larger (17%). Use of zero degree calorimeter triggering (and thus small
impact parameter weighting) makes impact parameter representation of exact pair
production useful. Preliminary exact calculations in the zero impact parameter
limit show a much larger reduction from perturbation theory (about 40%) at both
RHIC and LHC.


title: Correlations in the Parton Recombination Model

abstract:
  We describe how parton recombination can address the recent measurement of
dynamical jet-like two particle correlations. In addition we discuss the
possible effect realistic light-cone wave-functions including higher
Fock-states may have on the well-known elliptic flow valence-quark number
scaling law.


title:
Comparison between two methods of solution of coupled equations for
  low-energy scattering

abstract:
  Cross sections from low-energy neutron-nucleus scattering have been evaluated
using a coupled channel theory of scattering. Both a coordinate-space and a
momentum-space formalism of that coupled-channel theory are considered.A simple
rotational model of the channel interaction potentials is used to find results
using two relevant codes, ECIS97 and MCAS, so that they may be compared. The
very same model is then used in the MCAS approach to quantify the changes that
occur when allowance is made for effects of the Pauli principle.


title: Evolution of deformations in medium-mass nuclei

abstract:
  Evolution of quadrupole deformations in $sd$ and $pf$ shell nuclei with mass
A= 18$\sim$56 is studied by using deformed Skyrme Hartree-Fock (HF) model with
pairing correlations. We point out that the quadrupole deformations of the
nuclei with the isospin T=0 and T=1 show strong mass number dependence as a
clear manifestation of dynamical evolution of deformation in nuclear many-body
systems. The competition between the deformation driving particle-vibration
coupling and the closed shell structure is shown in a systematic study of the
ratios between the proton and neutron deformations in nuclei with
T=$|$T$_z|$=1. Calculated quadrupole and hexadecapole deformations are compared
with shell model results and available experimental data. A relation between
the skin thickness and the intrinsic Q$_2$ moments is also discussed.


title:
Search for the Skyrme-Hartree-Fock Solutions for Chiral Rotation in N=75
  Isotones

abstract:
  A search for the self-consistent solutions for the chiral rotational bands in
the N=75 isotones, 130Cs, 132La, 134Pr and 136Pm is performed within the
Skyrme-Hartree-Fock cranking approach using SKM* and SLy4 parametrizations. The
dependence of the solutions on the time-odd contributions in the energy
functional is studied. From among the considered four isotones, self-consistent
chiral solutions are obtained only in 132La. The microscopic calculations are
compared with the 132La experimental data and with results of a classical model
that contains all the mechanisms underlying the chirality of the collective
rotational motion. Strong similarities between the HF and classical model
results are found. The suggestion formulated earlier by the authors that the
chiral rotation cannot exist below a certain critical frequency is further
illustrated and discussed, together with the microscopic origin of a transition
from the planar to chiral rotation in nuclei. We also formulate the
separability rule by which the Tilted-Axis-Cranking solutions can be inferred
from three independent Principal-Axis-Cranking solutions corresponding to three
different axes of rotation.


title:
Low-energy neutron-12C analyzing powers: Results from a multichannel
  algebraic scattering theory

abstract:
  Analyzing powers in low-energy neutron scattering from 12C are calculated in
an algebraic momentum-space coupled-channel formalism (MCAS). The results are
compared with recently obtained experimental data. The channel-coupling
potentials have been defined previously to reproduce the total cross section
and sub-threshold bound states of the compound system. Without further
adjustment, good agreement with data for the analyzing powers is obtained.


title: Invisible nuclear system

abstract:
  A consecutive formalism and analysis of exactly solvable radial
reflectionless potentials with barriers, which in the spatial semiaxis of
radial coordinate $r$ have one hole and one barrier, after which they fall down
monotonously to zero with increasing of $r$, is presented. It has shown, that
at their shape such potentials look qualitatively like radial scattering
potentials in two-partial description of collision between particles and nuclei
or radial decay potentials in the two-partial description of decay of compound
spherical nuclear systems. An analysis shows, that the particle propagates
without the smallest reflection and without change of an angle of motion (or
tunneling) during its scattering inside the spherically symmetric field of the
nucleus with such radial potential of interaction, i. e. the nuclear system
with such interacting potential shows itself as invisible for the incident
particle with any kinetic energy. An approach for construction of a hierarchy
such reflectionless potentials is proposed, wave functions of the first
potentials of this hierarchy are found.


title: Can we distinguish energy loss from hadron absoprtion?

abstract:
  Knowing whether a hadron is formed inside or outside the nuclear medium is
very important for correctly interpreting jet quenching in heavy-ion
collisions. The cleanest experimental environment to study the space-time
evolution of hadronization is semi-inclusive DIS on nuclear targets. Two
frameworks are presently competing to explain the observed attenuation of
hadron production: quark energy loss, with hadron formation outside the
nucleus, and nuclear absorption with hadronization starting inside the nucleus.
I demonstrate that the observed approximate A^(2/3) scaling of experimental
data cannot conclusively establish the correctness of either energy loss or
absorption.


title: Coupled-channel study of baryon resonances with charm

abstract:
  Identifying a zero-range exchange of vector mesons as the driving force for
the s-wave scattering of pseudo-scalar mesons off the baryon ground states, a
rich spectrum of molecules is formed. We argue that chiral symmetry and
large-$N_c$ considerations determine that part of the interaction which
generates the spectrum. A bound state with exotic quantum numbers is predicted
at mass 2.78 GeV. It couples strongly to the $(\bar D_s N),(\bar D \Lambda
),(\bar D \Sigma)$ channels. A further charm minus-one system is predicted at
mass 2.84 GeV as a result of $(\bar D_s \Lambda), (\bar D \Xi)$ interactions.
The two so far observed s-wave baryons with charm one are recovered. We argue
that the $\Lambda_c(2880)$ is not a s-wave state. In addition to those states
we predict the existence of about ten narrow s-wave baryon states with masses
below 3 GeV. A triplet of crypto-exotic states decaying dominantly into
channels with an $\eta'$ is obtained with masses 4.24 GeV and 4.44 GeV.


title: Hubble-like flows in relativistic heavy-ion collisions

abstract:
  We study the dynamical appearance of scaling solutions in relativistic
hydrodynamics. The phase transition effects are included through the
temperature dependent sound velocity. If a pre-equilibrium transverse flow is
included in the initial conditions, then it may reach the form of the
asymptotic Hubble flow, r/t, in short evolution times, 7-15 fm. The numerical
solutions are found to support to the freeze-out models (Blast-Wave, Buda-Lund,
Cracow).


title:
X(3): An Exactly Separable Gamma-Rigid Version of the X(5) Critical
  Point Symmetry

abstract:
  A gamma-rigid version (with gamma=0) of the X(5) critical point symmetry is
constructed. The model, to be called X(3) since it is proved to contain three
degrees of freedom, utilizes an infinite well potential, is based on exact
separation of variables, and leads to parameter free (up to overall scale
factors) predictions for spectra and B(E2) transition rates, which are in good
agreement with existing experimental data for 172-Os and 186-Pt. An unexpected
similarity of the first beta bands of the X(5) nuclei 150-Nd, 152-Sm, 154-Gd,
and 156-Dy to the X(3) predictions is observed.


title: Critical Point Symmetries in Nuclei

abstract:
  Critical Point Symmetries (CPS) appear in regions of the nuclear chart where
a rapid change from one symmetry to another is observed. The first CPSs,
introduced by F. Iachello, were E(5), which corresponds to the transition from
vibrational [U(5)] to gamma-unstable [O(6)] behaviour, and X(5), which
represents the change from vibrational [U(5)] to prolate axially deformed
[SU(3)] shapes. These CPSs have been obtained as special solutions of the Bohr
collective Hamiltonian. More recent special solutions of the same Hamiltonian,
to be described here, include Z(5) and Z(4), which correspond to maximally
triaxial shapes (the latter with ``frozen'' gamma=30 degrees), as well as X(3),
which corresponds to prolate shapes with ``frozen'' gamma=0. CPSs have the
advantage of providing predictions which are parameter free (up to overall
scale factors) and compare well to experiment. However, their mathematical
structure [with the exception of E(5)] needs to be clarified.


title: Strange quark collectivity of $\phi$ meson at RHIC

abstract:
  Based on A Multi-Phase Transport model, the elliptic flow $v_{2}$ of $\phi$
mesons which is reconstructed from $K^{+}K^{-}$ at the Relativistic Heavy Ion
Collider (RHIC) energy has been studied. The results show that reconstructed
$v_{2}$ of $\phi$ meson can keep the earlier information before $\phi$ decays
and it seems to obey the number of constituent quark scaling as other mesons
and baryons. This result indicates that the $\phi$ $v_2$ mostly reflects the
parton level collectivity developed during the early stage of the collisions
and the strange and light up/down quarks have similar collectivity properties
before the hadronization.


title: Energy Systematics of Jet Tomography

abstract:
  The collision energy dependence of jet tomography is investigated within the
GLV formalism. We estimate systematic uncertainties resulting from the
interplay of energy loss fluctuations and the rapid increase of the parton
transverse momentum slopes as $\sqrt{s}$ decreases from 200 to 62.4 AGeV.


title:
Rapidity and system size dependence of anisotropic flows in relativistic
  heavy ion collisions

abstract:
  We report results from a multiphase transport (AMPT) model on the rapidity
and system size dependence of charged hadron anisotropic flows in nuclear
collisions at the Relativistic Heavy Ion Collider (RHIC).


title: Jet and Leading Hadron Production in High-energy Heavy-ion Collisions

abstract:
  Jet tomography has become a powerful tool for the study of properties of
dense matter in high-energy heavy-ion collisions. I will discuss recent
progresses in the phenomenological study of jet quenching, including momentum,
colliding energy and nuclear size dependence of single hadron suppression,
modification of dihadron correlations and the soft hadron distribution
associated with a quenched jet.


title: Light front field theory of relativistic quark matter

abstract:
  Light-front quantization to many-particle systems of finite temperature and
density provides a novel approach towards a relativistic description of quark
matter and allows us to calculate the perturbative as well as the
non-perturbative regime of QCD. Utilizing a Dyson expansion of light-front
many-body Green functions we have so far calculated three-quark, quark-quark,
and quark-antiquark correlations that lead to the chiral phase transition, the
formation of hadrons and color superconductivity in a hot and/or dense
environment. Presently, we use an effective zero-range interaction, to compare
our results with the more traditional instant form approach where applicable.


title:
An Effective Theory for the Four-Body System with Short-Range
  Interactions

abstract:
  We discuss the application of an effective theory with contact interactions
to the non-relativistic four-body system with short-range interactions. We have
computed the binding energies of the 4He tetramer and the alpha-particle. A
well-known linear correlation between three- and four-body binding energies can
be understood as a result of the absence of a four-body force at leading order
within this framework. Further, we give results for the binding energies of the
four-boson system in two spatial dimensions.


title: The structure of the nucleon

abstract:
  Experimental data on electromagnetic and weak form factors of the nucleon are
analyzed in a two-component model with a quark-like intrinsic structure
surrounded by a meson cloud. The contribution from strange quarks is discussed
and compared with recent data from the G0 Collaboration.


title: Light front approach to correlations in hot quark matter

abstract:
  We investigate two-quark correlations in hot and dense quark matter. To this
end we use the light front field theory extended to finite temperature $T$ and
chemical potential $\mu$. Therefore it is necessary to develop quantum
statistics formulated on the light front plane. As a test case for light front
quantization at finite $T$ and $\mu$ we consider the NJL model. The solution of
the in-medium gap equation leads to a constituent quark mass which depends on
$T$ and $\mu$. Two-quark systems are considered in the pionic and diquark
channel. We compute the masses of the two-body system using a $T$-matrix
approach.


title: Can tetraneutron exist from theoretical point of view?

abstract:
  A theoretical possibility is shown for the bound state of a tetraneutron to
exist in the case of the proposed neutron-neutron potentials in the singlet
state with two attractive wells separated by a repulsive barrier. The anomalous
behaviours are revealed for the calculated size, density distribution, and pair
correlation functions of a hypothetical tetraneutron.


title:
Zipf's Law and the Universality Class of the Fragmentation Phase
  Transition

abstract:
  We show that Zipf's Law for the largest clusters is not valid in an exact
sense at the critical point of the fragmentation phase transition, contrary to
previous claims. Instead, the extracted distributions of the largest clusters
reflects the choice of universality class through the value of the critical
exponent tau.


title: Correlation Functions: Getting into Shape

abstract:
  The ability to measure characteristics of source shapes using non-identical
particle correlations is discussed. Both strong-interaction induced and Coulomb
induced correlations are shown to provide sensitivity to source shapes. By
decomposing correlation functions with spherical or Cartesian harmonics,
details of the shapes can be especially well isolated.


title: Refractive Distortions of Two-Particle Correlations

abstract:
  Using optical model calculations it has recently been shown that refractive
phenomena from the collective mean field can significantly alter the sizes
inferred from two-pion correlations. We demonstrate that such effects can be
accounted for in classical calculations if mean field effects are included.


title: Is HBT really puzzling?

abstract:
  Two-particle correlations from RHIC have provided a surprising snapshot of
the final state at RHIC. In this talk I discuss the nature of the HBT puzzle
and attempt to delineate several factors which might ultimately resolve the
issue.


title:
Can one extract the pi-neutron scattering length from pi-deuteron
  scattering?

abstract:
  We give a prove of evidence that the original power counting by Weinberg can
be applied to estimate the contributions of the operators contributing to the
pi-deuteron scattering length. As a consequence, pi-deuteron observables can be
used to extract neutron amplitudes--in case of pi-deuteron scattering this
means that the pi-neutron scattering length can be extracted with high
accuracy. This result is at variance with recent claims. We discuss the origin
of this difference.


title: Information theory of open fragmenting systems

abstract:
  An information theory description of finite systems explicitly evolving in
time is presented. We impose a MaxEnt variational principle on the Shannon
entropy at a given time while the constraints are set at a former time. The
resulting density matrix contains explicit time odd components in the form of
collective flows. As a specific application we consider the dynamics of the
expansion in connection with heavy ion experiments. Lattice gas and classical
molecular dynamics simulations are shown.


title:
The effects of deformation and pairing correlations on nuclear charge
  form factor

abstract:
  A set of moderately deformed $s-d$ shell nuclei is employed for testing the
reliability of the nuclear ground state wave functions which are obtained in
the context of a BCS approach and offer a simultaneous consideration of
deformation and pairing correlations effects. In this method, the mean field is
assumed to be an axially symmetric Woods-Saxon potential and the effective
two-body interaction is a monopole pairing force. As quantities of main
interest we have chosen the nuclear form factors, the occupancies of the active
(surface) orbits and the Fermi sea depletion, which provide quite good tests
for microscopic descriptions of nuclei within many body theories. For our
comparisons with results emerging from other similar methods, an axially
deformed harmonic oscillator field is also utilized.


title: Color superconductivity in quark matter

abstract:
  A brief introduction into the properties of dense quark matter is given.
Recently proposed gapless color superconducting phases of neutral and
beta-equilibrated dense quark matter are discussed. The current status in the
field is described, and the promising directions of the future research are
outlined.


title:
Mass number dependence of the Skyrme-force-induced nuclear symmetry
  energy

abstract:
  The global mass dependence of the nuclear symmetry energy and its two basic
ingredients due to the mean-level spacing and effective strength of the
isovector mean-potential is studied within the Skyrme-Hartree-Fock model. In
particular, our study determines the ratio of the surface-to-volume
contributions to the nuclear symmetry energy to be ~1.6 and reveals that
contributions due to mean-level spacing and effective strength of the isovector
mean-potential are almost equal after removing momentum-dependent effects by
rescaling them with isoscalar and isovector effective masses, respectively.


title: Hadronization of Expanding QGP

abstract:
  We discuss how the dynamics of an exploding hot fireball of quark--gluon
matter impacts the actual phase transition conditions between the deconfined
and confined state of matter. We survey the chemical conditions prevailing at
hadronization.


title: QCD modeling of hadron physics

abstract:
  We review recent developments in the understanding of meson properties as
solutions of the Bethe-Salpeter equation in rainbow-ladder truncation. Included
are recent results for the pseudoscalar and vector meson masses and leptonic
decay constants, ranging from pions up to c\bar{c} bound states; extrapolation
to b\bar{b} states is explored. We also present a new and improved calculation
of F_\pi(Q^2) and an analysis of the \pi\gamma\gamma transition form factor for
both \pi(140) and \pi(1330). Lattice-QCD results for propagators and the
quark-gluon vertex are analyzed, and the effects of quark-gluon vertex dressing
and the three-gluon coupling upon meson masses are considered.


title:
Unique features of structure in an odd-proton $N \approx Z$ nucleus
  $^{69}$As

abstract:
  We apply a large-scale shell model to the study of proton-rich odd-mass
nuclei with $N \approx Z$. Calculations predict unexpected structure in the
$^{69}$As nucleus for which a detailed experiment was recently performed. In
this odd-proton nucleus, one neutron competes with one proton for occupying the
high-$j$ intruder orbit $g_{9/2}$ in the $9/2_1^+$ state and almost solely
occupies the $g_{9/2}$ orbit in other low-lying positive-parity states. The
T=0, J=9 one-proton-one-neutron alignment takes place in the negative-parity
states with medium-high spins. A unique coexistence of two lowest bands with
positive and negative signs of spectroscopic quadrupole moments is predicted.


title: Properties of hadron and quark matter studied with a molecular dynamics

abstract:
  We study the hadron-quark phase transition in a molecular dynamics (MD) of
quark degrees of freedom. The hadron state at low density and temperature, and
the deconfined quark state at high density and temperature are observed in our
model. We investigate the equations of state and draw the phase-diagram at wide
baryon density and temperature range. We also discuss the transport property,
e.g. viscosity, of $q\bar{q}$ matter. It is found that the ratio of the shear
viscosity to the entropy density is less than one for quark matter.


title:
Wilsonian RG and Redundant Operators in Nonrelativistic Effective Field
  Theory

abstract:
  In a Wilsonian renormalization group (RG) analysis, redundant operators,
which may be eliminated by using field redefinitions, emerge naturally. It is
therefore important to include them. We consider a nonrelativisitic effective
theory (the so-called ``pionless'' Nuclear Effective Field Theory) as a
concrete example and show that the off-shell amplitudes cannot be renormalized
if the redundant operators are not included. The relation between the theories
with and without such redundant operators is established in the low-energy
expansion. We perform a Wilsonian RG analysis for the \textit{off-shell}
scattering amplitude in the theory with the redundant operator.


title:
NeXSPheRIO results on elliptic flow at RHIC and connection with
  thermalization

abstract:
  Elliptic flow at RHIC is computed event-by-event with NeXSPheRIO. Reasonable
agreement with experimental results on $v_2(\eta)$ is obtained. Various effects
are studied as well: reconstruction of impact parameter direction, freeze out
temperature, equation of state (with or without crossover), emission mecanism.


title: Mass generation in coalescence - effects on hadron spectra

abstract:
  Different scenarios for the creation of constituent mass in the hadron
formation process are discussed. Effects of these may be observable in hadron
momentum spectra.


title: Kaon to Pion ratio in Heavy Ion Collisions

abstract:
  The momentum integrated Boltzmann equation has been used to study the
evolution of strangeness of the strongly interacting system formed after the
heavy ion collisions at relativistic energies.We argue that the experimentally
observed non-monotonic, horn-like structure in the variation of the $K^+/\pi^+$
with colliding energy appears due to the release of large number of colour
degrees of freedom.


title: Seniority conservation and seniority violation in the g_{9/2} shell

abstract:
  The g_{9/2} shell of identical particles is the first one for which one can
have seniority-mixing effects. We consider three interactions: a delta
interaction that conserves seniority, a quadrupole-quadrupole (QQ) interaction
that does not, and a third one consisting of two-body matrix elements taken
from experiment (98Cd) that also leads to some seniority mixing. We deal with
proton holes relative to a Z=50,N=50 core. One surprising result is that, for a
four-particle system with total angular momentum I=4, there is one state with
seniority v=4 that is an eigenstate of any two-body interaction--seniority
conserving or not. The other two states are mixtures of v=2 and v=4 for the
seniority-mixing interactions. The same thing holds true for I=6. Another point
of interest is that the splittings E(I_{max})-E(I_{min}) are the same for three
and five particles with a seniority conserving interaction (a well known
result), but are equal and opposite for a QQ interaction. We also fit the
spectra with a combination of the delta and QQ interactions. The Z=40,N=40 core
plus g_{9/2} neutrons (Zr isotopes) is also considered, although it is
recognized that the core is deformed.


title: Four-nucleon force in chiral effective field theory

abstract:
  We derive the leading contribution to the four-nucleon force within the
framework of chiral effective field theory. It is governed by the exchange of
pions and the lowest-order nucleon-nucleon contact interaction and includes
effects due to the nonlinear pion-nucleon couplings and the pion self
interactions constrained by the chiral symmetry of QCD. The resulting
four-nucleon force does not contain any unknown parameters and can be tested in
few- and many-nucleon studies.


title: Coulomb deexcitation of pionic hydrogen within close-coupling method

abstract:
  The Coulomb deexcitation of $(\pi p)$ atom in collisions with the hydrogen
atom has been studied in the fully quantum mechanical close-coupling approach
for the first time. The total Coulomb deexcitation cross-sections of $nl\to
n'l'$ transitions and $l$-averaged cross-sections are calculated for $n=3 - 8$
and at the relative energies $E=0.01 - 100$ eV. The strong interaction and
vacuum polarization shifts of $ns$-states are taken into account. It is shown
that the $\Delta n > 1$ transitions are very important and make up a
substantial fraction of the Coulomb deexcitation cross-section (up to $\sim
47%$).


title: Dynamical aspects of fragmentation

abstract:
  In this short communication we address the problem of reducibility in a
highly excited Lennard-Jones system. We show that the probability of emitting
$n$ fragments can be described in terms of a single probability through the
binomial expression. However, the Arrhenius law does not hold and the process
can be viewed as a mixture of sequential and simultaneous fragmentation events.


title:
Fine structure of the 0.7 MeV resonance in the 230Th neutron--induced
  cross section

abstract:
  The fine structure of the 0.7 MeV resonance in the 230Th neutron-induced
cross section is investigated within the hybrid model. A very good agreement
with experimental data is obtained. It is suggested that fine structure of the
cross section quantify the changes of the intrinsic states of the nucleus
during the disintegration process.


title: 7Be(p,gamma)8B S-factor from ab initio wave functions

abstract:
  Nuclear structure of 7Be, 8B and 7,8Li is studied within the ab initio
no-core shell model (NCSM). Starting from the high-precision CD-Bonn 2000
nucleon-nucleon (NN) interaction, 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.


title: Low Momentum NN-interactions and Nuclear Matter Calculations

abstract:
  Separable nucleon-nucleon potentials are calculated using inverse scattering
techniques as presented in previously published work. The dependence of the
potentials on the momentum cut-off of the scattering phase-shifts is studied.
Some comparison is made with the V-low-k potential. The effect of the cut-off
on nuclear matter binding energy calculated by standard Brueckner theory is
also presented. It is foumd that a cut-off larger than about 4 fm-1 will keep
the error to within one Mev around saturation density. While the potentials are
cut-off dependent the effective interaction represented by the Brueckner
K-matrix is less sensitive to this cut-off. This is in particular found to be
the case for the 1S0 state.


title:
Exactly Solvable Models: The Road Towards a Rigorous Treatment of Phase
  Transitions in Finite Systems

abstract:
  We discuss exact analytical solutions of a variety of statistical models
recently obtained for finite systems by a novel powerful mathematical method,
the Laplace-Fourier transform. Among them are a constrained version of the
statistical multifragmentation model, the Gas of Bags Model and the Hills and
Dales Model of surface partition. Thus, the Laplace-Fourier transform allows
one to study the nuclear matter equation of state, the equation of state of
hadronic and quark gluon matter and surface partitions on the same footing. A
complete analysis of the isobaric partition singularities of these models is
done for finite systems. The developed formalism allows us, for the first time,
to exactly define the finite volume analogs of gaseous, liquid and mixed phases
of these models from the first principles of statistical mechanics and
demonstrate the pitfalls of earlier works. The found solutions may be used for
building up a new theoretical apparatus to rigorously study phase transitions
in finite systems. The strategic directions of future research opened by these
exact results are also discussed.


title: Periodic-orbit bifurcations as the origin of nuclear deformations

abstract:
  Semiclassical analysis of shell structures in realistic nuclear potentials
are presented using periodic-orbit theory. We adopted r^alpha potential model
and examined classical-quantum correspondence using Fourier transformation
technique. Spin-orbit coupling is also taken into account in the model
Hamiltonian. Gross shell structure for a certain combination of surface
diffuseness and spin-orbit parameters are investigated and its relation to
pseudospin symmetry is discussed. Analysis of superdeformed shell structure in
realistic model is also presented.


title: Room for an S = +1 pentaquark in K^+ - nucleus phenomenology

abstract:
  Evidence for excitation of exotic S=+1 pentaquark degrees of freedom is
presented by studying optical-potential fits to K^+ - nucleus total, reaction
and elastic-differential cross section data at p(lab) = 500 - 700 MeV/c.
Estimates of the underlying two-nucleon absorption K^+ n N --> Theta^+ N
reaction cross section are made and are used for discussing the anticipated
cross section of the strangeness exchange reaction K^+ N --> pi Theta^+.


title: Momentum Correlations for Identical Fermions

abstract:
  The effects of intensity interferometry (HBT), which are mainly reflected by
the measured momentum correlations, have been fully discussed since 1950's. The
analogous momentum correlations between identical fermions are however less
argued. Besides the fermion statistics, the momentum correlations between
identical fermions are also determined by some other aspects, such as coulomb
interaction, spin interactions and resonances formation. In this paper, we
discussed the factors that influence the momentum correlations between
$\Lambda$'s, especially spin interaction. It is also argued that the momentum
correlations between $\Lambda$'s are affected significantly by the yield ratio
of $\Sigma^0/\Lambda$, due to the limitation of experimental measurement. The
mixture of $\Sigma^0$'s and $\Lambda$s would significantly weaken the measured
two-particle momentum correlations of $\Lambda$'s.


title: Nuclear isomers: structures and applications

abstract:
  Isomeric states in the nuclei along the rapid proton capture process path are
studied by the projected shell model. Emphasis is given to two waiting point
nuclei Se-68 and Kr-72 that are characterized by shape coexistence. Energy
surface calculations indicate that the ground state of these nuclei corresponds
to an oblate-deformed minimum, while the lowest state at the prolate-deformed
minimum can be considered as a shape isomer. Due to occupation of the orbitals
with large K-components, states built upon two-quasiparticle excitations at the
oblate-deformed minimum may form high $K$-isomers. The impact of the isomer
states on isotopic abundance in X-ray bursts is studied in a multi-mass-zone
X-ray burst model by assuming an upper-lower limit approach.


title: What can we learn from hydrodynamic analysis at RHIC?

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 that this is a manifestation of rapid
increase of entropy density in the vicinity of QCD critical temperature, namely
deconfinement.


title:
Excitation of Nuclear Collective States by Heavy Ions within the Model
  of Semi-Microscopic Optical Potential

abstract:
  The (semi-)microscopic double-folding nucleus-nucleus optical potentials are
suggested for consideration of inelastic scattering with excitation of
collective nuclear states by using the adiabatic approach and the elastic
scattering amplitude in the high-energy approximation. The analytical
expression for inelastic scattering amplitude is obtained keeping the first
order terms in the deformation parameter of a potential. Calculations of
inelastic cross sections for the $^{17}$O heavy ions scattered on different
nuclei at about hundred Mev/nucleon are made, and the acceptable qualitative
agreement with the experimental data is obtained without introducing free
parameters. The prospect of the method for further applications is discussed.


title: Charged and neutral pion production in the S-matrix approach

abstract:
  The S-matrix approach is used to calculate charged as well as neutral pion
production reactions from NN scattering, with the same set of underlying
processes and interactions. The chiral perturbation theory piN scattering
amplitude is used. For the nucleon-nucleon distortions a newly developed
realistic potential within the Bonn family of potentials, valid well above the
pion production threshold, is considered. In the pi+ production case, the NN
potential, the piN relative p-waves and the treatment of the exchanged pion
energy build up the observed cross-section strength.


title: How To Classify 3-Body Forces -- And Why

abstract:
  For systems with only short-range forces and shallow 2-body bound states, the
typical strength of any 3-body force in all partial-waves, including external
currents, is systematically estimated by renormalisation-group arguments in the
Effective Field Theory of Point-Like Interactions. The underlying principle and
some consequences in particular in Nuclear Physics are discussed.


title:
Momentum, Density, and Isospin dependence of the Symmetric and
  Asymmetric Nuclear Matter Properties

abstract:
  Properties of symmetric and asymmetric nuclear matter have been investigated
in the relativistic Dirac-Brueckner-Hartree-Fock approach based on projection
techniques using the Bonn A potential. The momentum, density, and isospin
dependence of the optical potentials and nucleon effective masses are studied.
It turns out that the isovector optical potential depends sensitively on
density and momentum, but is almost insensitive to the isospin asymmetry.
Furthermore, the Dirac mass $m^*_D$ and the nonrelativistic mass $m^*_{NR}$
which parametrizes the energy dependence of the single particle spectrum, are
both determined from relativistic Dirac-Brueckner-Hartree-Fock calculations.
The nonrelativistic mass shows a characteristic peak structure at momenta
slightly above the Fermi momentum $\kf$. The relativistic Dirac mass shows a
proton-neutron mass splitting of $m^*_{D,n} <m^*_{D,p}$ in isospin asymmetric
nuclear matter. However, the nonrelativistic mass has a reversed mass splitting
$m^*_{NR,n} >m^*_{NR,p}$ which is in agreement with the results from
nonrelativistic calculations.


title:
Self-Consistent Description of Collective Excitations in the Unitary
  Correlation Operator Method

abstract:
  The fully self-consistent Random Phase Approximation (RPA) is constructed
within the Unitary Correlation Operator Method (UCOM), which describes the
dominant interaction-induced short-range central and tensor correlations by a
unitary transformation. Based on the correlated Argonne V18 interaction, the
RPA is employed in studies of multipole response in closed-shell nuclei across
the nuclide chart. The UCOM-RPA results in a collective character of giant
resonances, and it describes rather well the properties of isoscalar giant
monopole resonances. However, the excitation energies of isovector giant dipole
resonances and isoscalar giant quadrupole resonances are overestimated due to
the missing long-range correlations and three-body contributions.


title: The near threshold N N -> d pi reaction in chiral perturbation theory

abstract:
  The near-threshold n p -> d pi0 cross section is calculated in chiral
perturbation theory to next-to-leading order in the expansion parameter sqrt{M
m_pi}/Lambda_chi. At this order irreducible pion loops contribute to the
relevant pion-production operator. While their contribution to this operator is
finite, considering initial-and final-state distortions produces a linear
divergence in its matrix elements. We renormalize this divergence by
introducing a counterterm, whose value we choose in order to reproduce the
threshold n p -> d pi0 cross section measured at TRIUMF. The energy-dependence
of this cross section is then predicted in chiral perturbation theory, being
determined by the production of p-wave pions, and also by energy dependence in
the amplitude for the production of s-wave pions. With an appropriate choice of
the counterterm, the chiral prediction for this energy dependence converges
well.


title: Contour integral method for thermal and quantal fluctuations

abstract:
  The partition function by means of the static path approximation (SPA) plus
the random-phase approximation (RPA) treatment can be written as a contour
integral form without solving the RPA equations for a separable interaction.
This method is an efficient way to evaluate numerically the partition function
for realistic calculations. As an illustration, we adopt the pairing model at
finite temperature.


title:
Phase transitions in the Interacting Boson Fermion Model: the
  gamma-unstable case

abstract:
  The phase transition around the critical point in the evolution from
spherical to deformed gamma-unstable shapes is investigated in odd nuclei
within the Interacting Boson Fermion Model. We consider the particular case of
an odd j=3/2 particle coupled to an even-even boson core that undergoes a
transition from spherical U(5) to gamma-unstable O(6) situation. The particular
choice of the j=3/2 orbital preserves in the odd case the condition of
gamma-instability of the system. As a consequence, energy spectrum and
electromagnetic transitions, in correspondence of the critical point, display
behaviours qualitatively similar to those of the even core. The results are
also in qualitative agreement with the recently proposed E(5/4) model, although
few differences are present, due to the different nature of the two schemes.


title: Hadronic production of eta--mesons: recent results and open questions

abstract:
  I review recent insights and open questions connected with the production of
eta--mesons from hadrons.


title:
Hadronic dissipative effects on elliptic flow in ultrarelativistic
  heavy-ion collisions

abstract:
  We study the elliptic flow coefficient v_2(eta,b) in Au+Au collisions at
sqrt(s)=200 A GeV as a function of pseudorapidity eta and impact parameter b.
Using a hybrid approach which combines early ideal fluid dynamical evolution
with late hadronic rescattering, we demonstrate strong dissipative effects from
the hadronic rescattering stage on the elliptic flow. With Glauber model
initial conditions, hadronic dissipation is shown to be sufficient to fully
explain the differences between measured v_2 values and ideal hydrodynamic
predictions. Initial conditions based on the Color Glass Condensate model
generate larger elliptic flow and seem to require additional dissipation during
the early quark-gluon plasma stage in order to achieve agreement with
experiment.


title:
Effect of gauge-field fluctuations on the phase transition between
  normal and color-superconducting quark matter

abstract:
  Type-I color superconductors display a first-order phase transition due to
thermal gauge-field fluctuations. We numerically evaluated the critical
temperature of the first-order phase transition and the corresponding
discontinuity of the diquark condensate at the critical point.


title: Boson Realization of the su(3)-Algebra. IV

abstract:
  On the basis of the Schwinger boson representation for the Elliott model
developed in (III), the Holstein-Primakoff representation for the su(3)-algebra
is presented. The basic idea is the same as that adopted in (II), and as an
example, the case of the lowest approximation is shown.


title: Boson Realization of the su(3)-Algebra. III

abstract:
  Following the basic idea developed in (I), the su(3)-model presented by
Elliott is investigated. A method for constructing the orthogonal set, in which
the angular momenta are good quantum numbers, is discussed without using the
angular momentum projection.


title: Collective Rotation of Tetrahedral Nuclei in the Cranking Model

abstract:
  The three-dimensional cranking model is used to investigate the microscopic
aspects of the rotation of nuclei with the tetrahedral symmetry. Two classes of
rotation axes are studied corresponding to two different discrete symmetries of
the rotating hamiltonian. Self-consistent Hartree-Fock-Bogoliubov calculations
show that the tetrahedral minimum remains remarkably stable until the first
single-particle crossing.


title: On the Cosmic Nuclear Cycle and the Similarity of Nuclei and Stars

abstract:
  Repulsive interactions between neutrons in compact stellar cores cause
luminosity and a steady outflow of hydrogen from stellar surfaces. Neutron
repulsion in more massive compact objects made by gravitational collapse
produces violent, energetic, cosmological events (quasars, gamma ray bursts,
and active galactic centers) that had been attributed to black holes before
neutron repulsion was recognized. Rather than evolving in one direction by
fusion, nuclear matter on the cosmological scale cycles between fusion,
gravitational collapse, and dissociation (including neutron-emission). This
cycle involves neither the production of matter in an initial Big Bang nor the
disappearance of matter into black holes. The similarity Bohr noted between
atomic and planetary structures extends to a similarity between nuclear and
stellar structures.


title: Large Observed $v_2$ as a Signature for Deconfinement

abstract:
  We present a new plot for representing RAA data that emphasizes the strong
correlation between high-pt suppression and its elliptic anisotropy. We
demonstrate that existing models cannot reproduce the centrality dependence of
this correlation. Modification of a geometric energy loss model to include
thermal absorption and stimulated emission can match the trend of the data, but
requires dN/dy values inconsistent with the observed multiplicity. By including
a small, outward-normal directed surface impulse opposing energy loss, $\Delta
pt \hat{n}$, one can account for the centrality dependence of the observed
Au+Au elliptic quench pattern. We also present predictions for Cu+Cu reactions.


title: The role of five-quark components in gamma decay of the $\Delta(1232)$

abstract:
  An admixture of 10-20 % of qqqq\bar q components in the Delta(1232) resonance
is shown to reduce the well known underprediction for the decay width for
Delta(1232)->N gamma decay by about half and that of the corresponding helicity
amplitudes from a factor ~ 1.7 to ~ 1.5. The main effect is due to the
quark-antiquark annihilation transitions qqqq\bar q -> qqq gamma, the
consideration of which brings the ratio A_{3/2}/A_{1/2} and consequently the
E2/M1 ratio R_{EM} into agreement with the empirical value. Transitions between
qqqq\bar q components in the resonance and the nucleon qqqq\bar q->qqqq\bar q
gamma are shown to enhance the calculated width by only a few percent, as long
as the probability of the qqqq\bar q component of the Delta(1232) and the
proton is at most ~ 20 %. The transitions qqqq\bar q->qqqq\bar q gamma between
the qqqq\bar q components in the Delta(1232) and the proton do not lead to a
nonzero value for R_{EM}.


title: Towards a field theoretic understanding of NN->NNpi

abstract:
  We study the production amplitude for the reaction NN->NNpi up to
next--to--leading order in chiral perturbation theory using a counting scheme
that takes into account the large scale introduced by the initial momentum. In
particular we investigate a subtlety that arises once the leading loop
contributions are convoluted with the NN wavefunctions as demanded by the
non--perturbative nature of the NN interaction. We show how to properly
identify the irreducible contribution of loop diagrams in such type of
reaction. The net effect of the inclusion of all next-to-leading order loops is
to enhance the leading rescattering amplitude by a factor of 4/3, bringing its
contribution to the cross section for pp->dpi+ close to the experimental value.


title:
Study of the $\eta$N scattering amplitude through the associated
  photoproduction of $\phi$- and $\eta$-mesons in the region of the N*(1535)
  resonance

abstract:
  The $\gamma p \to \phi \eta p$ reaction is studied in the kinematic region
where the $\eta p$ final state originates dominantly from the decay of the
N*(1535) resonance. The threshold laboratory photon energy for this reaction
(at the peak of the S11 resonance) is $E_\gamma^{Lab} = $3 GeV. We will discuss
it somewhat above threshold, at $E_\gamma^{Lab}\simeq 4-5$ GeV, in order to
reach lower (absolute) values of the squared 4-momentum transfer from the
initial photon to the final $\phi$-meson. In these conditions, we expect the
t-channel $\pi^0$- and $\eta$-meson exchanges to drive the dynamics underlying
the $\gamma p \to \phi \eta p$ process. The initial photon dissociates into the
final $\phi$-meson and a virtual pseudoscalar meson ($\pi^0$ or $\eta$). The
virtual pseudoscalar meson scatters from the proton target to produce the final
$\eta p$ state. The $\pi^0 p \to \eta p$ and $\eta p \to \eta p$ amplitudes are
derived in the framework of a coupled-channel effective field theory of
meson-baryon scattering. We found the $\eta$-meson exchange to be largely
dominant. The $\eta$-$\pi^0$ interference is of the order of $20 - 30 %$. The
sign of this term is not known and has a significant influence on the results.
The $\pi N\to \eta N$ amplitude being largely determined by data on the $\pi^-
p \to \eta n$ reaction, we found that the $\gamma p \to \phi \eta p$ reaction
cross section is rather directly related to the $\eta$-nucleon scattering
amplitude in the N*(1535) resonance region. Accurate data on the $\gamma p \to
\phi \eta p$ process would therefore put additional constraints on this still
poorly known amplitude.


title:
The Effect of the Short-Range Correlations on the Generalized Momentum
  Distribution in Finite Nuclei

abstract:
  The effect of dynamical short-range correlations on the generalized momentum
distribution $n(\vec{p},\vec{Q})$ in the case of $Z=N$, $\ell$-closed shell
nuclei is investigated by introducing Jastrow-type correlations in the
harmonic-oscillator model. First, a low order approximation is considered and
applied to the nucleus $^4$He. Compact analytical expressions are derived and
numerical results are presented and the effect of center-of-mass corrections is
estimated. Next, an approximation is proposed for $n(\vec{p}, \vec{Q})$ of
heavier nuclei, that uses the above correlated $n(\vec{p},\vec{Q})$ of $^4$He.
Results are presented for the nucleus $^{16}$O. It is found that the effect of
short-range correlations is significant for rather large values of the momenta
$p$ and/or $Q$ and should be included, along with center of mass corrections
for light nuclei, in a reliable evaluation of $n(\vec{p},\vec{Q})$ in the whole
domain of $p$ and $Q$.


title:
Delta K, Lambda K, and Sigma K states in the extended chiral SU(3) quark
  model

abstract:
  By use of the resonating group method, the Delta K, Lambda K, and Sigma K
states are further dynamically studied in the extended chiral SU(3) quark model
based on our previous work. Similar to the results given by the original chiral
SU(3) quark model, the calculated results here still show that the interactions
of Delta K with isospin I=1 and Sigma K with isospin I=1/2 are attractive,
which can consequently lead to Delta K and Sigma K quasibound states. When the
channel coupling of Lambda K and Sigma K is considered, the calculated phase
shifts show a sharp resonance between the thresholds of these two channels with
spin-parity J^P=1/2^-.


title: Modelling Nuclear Effects in Neutrino Scattering

abstract:
  We have developed a model to describe the interactions of neutrinos with
nucleons and nuclei via charged and neutral currents, focusing on the region of
the quasielastic and Delta(1232) peaks. For neutrino nucleon collisions a fully
relativistic formalism is used. The extension to finite nuclei has been done in
the framework of a coupled-channel BUU transport model where we have studied
exclusive channels taking into account in-medium effects and final state
interactions.


title:
Coulomb breakup effects on the elastic cross section of
  $^6$He+$^{209}$Bi scattering near Coulomb barrier energies

abstract:
  We accurately analyze the $^6$He+$^{209}$Bi scattering at 19 and 22.5 MeV
near the Coulomb barrier energy, using the continuum-discretized
coupled-channels method (CDCC) based on the $n$+$n$+$^4$He+$^{209}$Bi four-body
model.
  The three-body breakup continuum of $^6$He is discretized by diagonalizing
the internal Hamiltonian of $^6$He in a space spanned by the Gaussian basis
functions.
  The calculated elastic and total reaction cross sections are in good
agreement with the experimental data, while the CDCC calculation based on the
di-neutron model of $^6$He, i.e., the $^2n$+$^{4}$He+$^{209}$Bi three-body
model, does not reproduce the data.


title: Strange form factors of the nucleon in a two-component model

abstract:
  The strange form factors of the nucleon are studied in a two-component model
consisting of a three-quark intrinsic structure surrounded by a meson cloud. A
comparison with the available experimental world data from the SAMPLE, PVA4,
HAPPEX and G0 collaborations shows a good overall agreement. The strange
magnetic moment is found to be positive, 0.315 nm.


title: Baryon self energies in the chiral loop expansion

abstract:
  We compute the self energies of the baryon octet and decuplet states at the
one-loop level applying the manifestly covariant chiral Lagrangian. It is
demonstrated that expressions consistent with the expectation of power counting
rules arise if the self energies are decomposed according to the
Passarino-Veltman scheme supplemented by a minimal subtraction. This defines a
partial summation of the chiral expansion. A finite renormalization required to
install chiral power counting rules leads to the presence of an infrared
renormalization scale. Good convergence properties for the chiral loop
expansion of the baryon octet and decuplet masses are obtained for natural
values of the infrared scale. A prediction for the strange-quark matrix element
of the nucleon is made.


title:
Dynamical generation of $J^P=3/2-$ resonances and the $\Lambda(1520)$
  resonance

abstract:
  The lowest order chiral Lagrangian is used to study s-wave interactions of
the baryon decuplet with the octet of pseudoscalar mesons. The coupled channel
Bethe Salpeter equation is used to obtain dynamically generated
$\tfrac{3}{2}^-$ resonances in the partial wave amplitudes which provide a
reasonable description to a number of 3 and 4-star resonances like
$\Delta(1700)$, $\Lambda(1520)$, $\Sigma(1670)$, $\Sigma(1940)$, $\Xi(1820)$,
$\Omega(2250)$ etc. The phenomenological introduction of d-wave channels in the
coupled channel scheme along with the existing s-wave channels is shown to
provide a much improved description of the $\Lambda(1520)$ resonance. The
prediction of the absolute strength of the cross section in the reactions
$K^-p\to\Lambda\pi^0\pi^0$ and $K^-p\to\Lambda\pi^+\pi^-$ provided by this
scheme shows a good agreement with existing data.


title: The Resonance Theory of Proton and Alpha Decay from Hot Sources

abstract:
  The consecutive microscopic solution is presented of the problem of tunneling
of a particle through a potential barrier. The method is applied to the alpha
and proton decay of compound systems formed in fusion reaction. Appearance of
the peaks in the spectrum of emitted particles is predicted. The peaks
correspond to quasistationary states inside the potential barrier.


title:
Constraining the Radii of Neutron Stars with Terrestrial Nuclear
  Laboratory Data

abstract:
  Neutron star radii are primarily determined by the pressure of isospin
asymmetric matter which is proportional to the slope of the nuclear symmetry
energy. Available terrestrial laboratory data on the isospin diffusion in
heavy-ion reactions at intermediate energies constrain the slope of the
symmetry energy. Using this constraint, we show that the radius (radiation
radius) of a 1.4 solar mass neutron star is between 11.5 (14.4) and 13.6 (16.3)
km.


title:
Manifestation of the cyclo-toroid nuclear moment in anomalous conversion
  and Lamb shift

abstract:
  We offer the hypothesis that atomic nuclei, nucleons, and atoms possess a new
type of electromagnetic moment, that we call a ``cyclo-toroid moment''. In
nuclei, this moment arises when the toroid dipole (anapole) moments are arrayed
in the form of a ring, or, equivalently, when the magnetic moments of the
nucleons are arranged in the form of rings which, in turn, constitute the
surface of a torus. We establish theoretically that the cyclo-toroid moment
plays a role in the processes of the atomic shell--nucleus interaction. The
existence of this moment would explain known anomalies in the internal
conversion coefficients for $M1$ transitions in nuclei. We show also that the
static cyclo-toroid nuclear moment interacts locally inside the nucleus with
the vortex part of the atomic electron currents and this leads to an energy
shift in atomic $s_{1/2}$ states. For the hydrogen atom the value of this shift
may be comparable in order of magnitude to the present accuracy of measurements
of the Lamb shift for the $1s_{1/2}$ level.


title: Charge Transfer Fluctuations as a QGP Signal

abstract:
  In this study, we analyze the recently proposed charge transfer fluctuations
within a finite pseudo-rapidity space. As the charge transfer fluctuation is a
measure of the local charge correlation length, it is capable of detecting
inhomogeneity in the hot and dense matter created by heavy ion collisions. We
predict that going from peripheral to central collisions, the charge transfer
fluctuations at midrapidity should decrease substantially while the charge
transfer fluctuations at the edges of the observation window should decrease by
a small amount. These are consequences of having a strongly inhomogeneous
matter where the QGP component is concentrated around midrapidity. We also show
how to constrain the values of the charge correlations lengths in both the
hadronic phase and the QGP phase using the charge transfer fluctuations.
Current manuscript is based on the preprints hep-ph/0503085 (to appear in
Physical Review C) and nucl-th/0506025.


title: Relativistic effects in neutrino-Fermi gas interactions

abstract:
  We study neutrino interactions in a hadron gas within a relativistic
framework. The hadron matter is described by a non-interacting Fermi gas in
beta equilibrium. We show that the introduction of relativistic effects causes
a sizable enhancement of the neutrino-scattering cross sections.


title: Extracting the Weinberg angle at intermediate energies

abstract:
  A recent experiment by the NuTeV collaboration resulted in a surprisingly
high value for the weak mixing angle $\sin^2 \theta_W$. The Paschos-Wolfenstein
relation, relating neutrino cross sections to the Weinberg angle, is of pivotal
importance in the NuTeV analysis. In this work, we investigate the sensitivity
of the Paschos-Wolfenstein relation to nuclear structure aspects at neutrino
energies in the few GeV range. Neutrino-nucleus cross sections are calculated
for $^{16}$O and $^{56}$Fe target nuclei within a relativistic quasi-elastic
nucleon-knockout model.


title: Understanding Supernova Neutrino Physics using Low-Energy Beta-Beams

abstract:
  We show that fitting linear combinations of low-energy beta-beam spectra to
supernova-neutrino energy-distributions reconstructs the response of a nuclear
target to a supernova flux in a very accurate way. This allows one to make
direct predictions about the supernova-neutrino signal in a terrestrial
neutrino detector.


title: Modelization of the EOS

abstract:
  This article summarizes theoretical predictions for the density and isospin
dependence of the nuclear mean field and the corresponding nuclear equation of
state. We compare predictions from microscopic and phenomenological approaches.
An application to heavy ion reactions requires to incorporate these forces into
the framework of dynamical transport models. Constraints on the nuclear
equation of state derived from finite nuclei and from heavy ion reactions are
discussed.


title:
Hadron production in central nucleus-nucleus collisions at chemical
  freeze-out

abstract:
  We analyze the experimental hadron yield ratios for central nucleus-nucleus
collisions in terms of thermal model calculations over a broad energy range,
$\sqrt{s_{NN}}$=2.7-200 GeV. The fits of the experimental data with the model
calculations provide the thermal parameters, temperature and baryo-chemical
potential at chemical freeze-out. We compare our results with the values
obtained in other studies and also investigate more technical aspects such as a
potential bias in the fits when fitting particle ratios or yields. Using
parametrizations of the temperature and baryonic chemical potential as a
function of energy, we compare the model calculations with data for a large
variety of hadron yield ratios. We provide quantitative predictions for
experiments at LHC energy, as well as for the low RHIC energy of 62.4 GeV. The
relation of the determined parameters with the QCD phase boundary is discussed.


title:
Au+Au Collisions: the Suppression of High Transverse Momentum in Neutral
  pion Spectra

abstract:
  Au+Au, $\sqrt{s} = 200$ A GeV measurements at RHIC, obtained with the PHENIX,
STAR, PHOBOS and BRAHMS detectors, have all indicated a suppression of
production, relative to an appropriately normalized NN level. For central
collisions and vanishing pseudo-rapidity these experiments indicate a
considerable reduction, relative to that nominally expected from equivalent PP
measurements, in charged and particle production, especially at mid- to large
transverse momenta. In the PHENIX experiment similar behavior has been reported
for $\pi^0$ spectra. In a recent work \cite{luc4brahms} on the presumably
simpler D+Au interaction, to be considered perhaps as a tune-up for Au+Au, we
reported on a hadronic cascade mechanism which can explain the observed
moderatereduced $p_\perp$ suppression at higher pseudorapidity as well as the
Cronin enhancement at mid- rapidity. Here we present the extension of this work
to the more massive ion-ion collisions.


title:
Transport coefficients of strongly coupled gauge theories: insights from
  string theory

abstract:
  The transport properties of certain strongly coupled thermal gauge theories
can be determined from their effective description in terms of gravity or
superstring theory duals. Here we provide a short summary of the results for
the shear and bulk viscosity, charge diffusion constant, and the speed of sound
in supersymmetric strongly interacting plasmas. We also outline a general
algorithm for computing transport coefficients in any gravity dual. The
algorithm relates the transport coefficients to the coefficients in the
quasinormal spectrum of five-dimensional black holes in asymptotically anti de
Sitter space.


title: Radiative neutron capture on a proton at BBN energies

abstract:
  The total cross section for radiative neutron capture on a proton, $np \to d
\gamma$, is evaluated at big bang nucleosynthesis (BBN) energies. The
electromagnetic transition amplitudes are calculated up to next-to leading
order within the framework of pionless effective field theory with dibaryon
fields. We also calculate the $d\gamma\to np$ cross section and the photon
analyzing power for the $d\vec{\gamma}\to np$ process from the amplitudes. The
values of low energy constants that appear in the amplitudes are estimated by a
Markov Chain Monte Carlo analysis using the relevant low energy experimental
data. Our result agrees well with those of other theoretical calculations
except for the $np\to d\gamma$ cross section at some energies estimated by an
R-matrix analysis. We also study the uncertainties in our estimation of the
$np\to d\gamma$ cross section at relevant BBN energies and find that the
estimated cross section is reliable to within $\sim$1% error.


title:
On the Accuracy of Hyperspherical Harmonics Approaches to Photonuclear
  Reactions

abstract:
  Using the Lorentz Integral Transform (LIT) method we compare the results for
the triton total photodisintegration cross section obtained using the
Correlated Hyperspherical Harmonics (CHH) and the Effective Interaction
Hyperspherical Harmonics (EIHH) techniques. We show that these two approaches,
while rather different both conceptually and computationally, lead to results
which coincide within high accuracy. The calculations which include two- and
three-body forces are of the same high quality in both cases. We also discuss
the comparison of the two approaches in terms of computational efficiency.
These results are of major importance in view of applications to the much
debated case of the four-nucleon photoabsorption.


title: Pair condensation and bound states in fermionic systems

abstract:
  We study the finite temperature-density phase diagram of an attractive
fermionic system that supports two-body (dimer) and three-body (trimer) bound
states in free space. Using interactions characteristic for nuclear systems, we
obtain the critical temperature T_c2 for the superfluid phase transition and
the limiting temperature T_c3 for the extinction of trimers. The phase diagram
features a Cooper-pair condensate in the high-density, low-temperature domain
which, with decreasing density, crosses over to a Bose condensate of strongly
bound dimers. The high-temperature, low-density domain is populated by trimers
whose binding energy decreases toward the density-temperature domain occupied
by the superfluid and vanishes at a critical temperature T_c3 > T_c2.


title:
Baryonic triplet P-wave dominant superfluidity under combined pion
  condensation with delta-mixing

abstract:
  We study baryonic superfluidity under the combined pion condensation with
delta-mixing, where both condensates of the neutral and charged pions take
place in neutron stars. Outline of formulation treating such superfluidity is
presented and energy gap calculations show the possibility that critical
temperatures are higher than about 1x10^9 K.


title: Neutron structure effects in the deuteron and one neutron halos

abstract:
  Although the neutron (n) does not carry a total electric charge, its charge
and magnetization distributions represented in momentum space by the
electromagnetic form factors, $F_1^{(n)} (q^2)$ and $F_2^{(n)} (q^2)$, lead to
an electromagnetic potential of the neutron. Using this fact, we calculate the
electromagnetic corrections to the binding energy, $B_d$, of the deuteron and a
one neutron halo nucleus (11Be), by evaluating the neutron-proton and the
neutron-charged core (10Be) potential, respectively. The correction to $B_d$
(~9 keV) is comparable to that arising due to the inclusion of the
$\Delta$-isobar component in the deuteron wave function. In the case of the
more loosely bound halo nucleus, 11Be, the correction is close to about 2 keV.


title: Elliptic flow of thermal photons in relativistic nuclear collisions

abstract:
  We predict the transverse momentum (pT) dependence of elliptic flow of
thermal photons for Au+Au collisions at the Relativistic Heavy Ion Collider. We
model the system hydrodynamically, assuming formation of a thermalized
quark-gluon plasma at some early time, followed by cooling through expansion,
hadronization and decoupling. Photons are emitted throughout the expansion
history. Contrary to hadron elliptic flow, which hydrodynamics predicts to
increase monotonically with pT, the elliptic flow of thermal photons is
predicted to first rise and then fall again as pT increases. Photon elliptic
flow at high pT is shown to reflect the quark momentum anisotropy at early
times when it is small, whereas at low pT it is controlled by the much larger
pion momentum anisotropy during the late hadronic emission stage. An
interesting structure is predicted at intermediate pT ~ 0.4 GeV/c where photon
elliptic flow reflects the momenta and the (compared to pions) reduced v2 of
heavy vector mesons in the late hadronic phase.


title: Structure of exotic three-body systems

abstract:
  The classification of large halos formed by two identical particles and a
core is systematically addressed according to interparticle distances. The
root-mean-square distances between the constituents are described by universal
scaling functions obtained from a renormalized zero-range model. Applications
for halo nuclei, $^{11}$Li and $^{14}$Be, and for atomic $^4$He$_3$ are briefly
discussed. The generalization to four-body systems is proposed.


title:
Deutron Break-Up: Theoretical Description of Polarization Observables in
  Stapp formalism

abstract:
  The vector and tensor analyzing powers as well as the polarization of the
outgoing proton are calculated for the exclusive deuteron break-up reaction
$\vec{d}p \to \vec{p}pn$ at a deuteron beam energy of 2 GeV. Two component
covariant formalism of Stapp has been used to have the completely Lorentz
invariant model. In addition to the Impulse Approximation the nucleon-nucleon
double-scattering and delta-excitation mechanism have been added coherently.
Good agreement with the precise data obtained at Saclay is achieved.


title: Spectra and binding energy predictions of chiral interactions for 7Li

abstract:
  Using the no-core shell model approach, we report on the first results for
7Li based on the next-to-next-to-leading order chiral nuclear interaction.
Both, two-nucleon and three-nucleon interactions are taken into account. We
show that the p-shell nuclei are sensitive to the subleading parts of the
chiral interactions including three-nucleon forces. Though chiral interactions
are soft, we do not observe overbinding for this p-shell nucleus and find a
realistic description for the binding energy, excitation spectrum and radius.


title:
Particle Number Fluctuations in High Energy Nucleus-Nucleus Collisions
  from Microscopic Transport Approaches

abstract:
  Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are
studied within the HSD and UrQMD transport models. The scaled variances of
negative, positive, and all charged hadrons in Pb+Pb at 158 AGeV are analyzed
in comparison to the data from the NA49 Collaboration. We find a dominant role
of the fluctuations in the nucleon participant number for the final hadron
multiplicity fluctuations. This fact can be used to check different scenarios
of nucleus-nucleus collisions by measuring the final multiplicity fluctuations
as a function of collision centrality. The analysis reveals surprising effects
in the recent NA49 data which indicate a rather strong mixing of the projectile
and target hadron production sources even in peripheral collisions.


title: Inhomogeneous freeze-out in relativistic heavy-ion collisions

abstract:
  A QCD phase transition may reflect in a inhomogeneous decoupling surface of
hadrons produced in relativistic heavy-ion collisions. We show that due to the
non-linear dependence of the particle densities on the temperature and
baryon-chemical potential such inhomogeneities should be visible even in the
integrated, inclusive abundances. We analyze experimental data from Pb+Pb
collisions at CERN-SPS and Au+Au collisions at BNL-RHIC to determine the
amplitude of inhomogeneities.


title: Pair production and optical lasers

abstract:
  Electron-positron pair creation in a standing wave is explored using a
parameter-free quantum kinetic equation. Field strengths and frequencies
corresponding to modern optical lasers induce a material polarisation of the
QED vacuum, which may be characterised as a plasma of e^+ e^- quasiparticle
pairs with a density of ~10^{20}cm^{-3}. The plasma vanishes almost completely
when the laser field is zero, leaving a very small residual pair density, n_r,
which is the true manifestation of vacuum decay. The average pair density per
period is proportional to the laser intensity but independent of the frequency,
\nu. The density of residual pairs also grows with laser intensity but n_r
\propto \nu^2. With optical lasers at the forefront of the current generation,
these dynamical QED vacuum effects may generate 5-10 observable two-photon
annihilation events per laser pulse.


title:
Effects of Time-Odd Components in Mean Field on Large Amplitude
  Collective Dynamics

abstract:
  We apply the adiabatic self-consistent collective coordinate (ASCC) method to
the multi-O(4) model and study collective mass (inertia function) of the
many-body tunneling motion. Comparing results with those of the exact
diagonalization, we show that the ASCC method succeeds in describing gradual
change of excitation spectra from an anharmonic vibration about the spherical
shape to a doublet pattern associated with a deformed double-well potential
possessing the oblate-prolate symmetry. The collective mass is significantly
increased by the quadrupole-pairing contribution to time-odd components of the
moving mean field. In contrast, the cranking (Inglis-Belyaev) mass based on the
constrained mean field, which ignores the time-odd components, is smaller than
the ASCC mass and fails to reproduce the exact spectra.


title:
Study of the effect of the tensor correlation on the alpha clustering in
  8Be with the charge- and parity-projected Hartree-Fock method

abstract:
  We study the effect of the tensor correlation in the alpha clustering in 8Be.
We take as the wave function of the alpha particle the one calculated by the
charge- and parity-projected Hartree- Fock method, which was proposed by us
recently. We use the wave function in a cluster-model calculation. The
expectation value of the potential energy from the tensor force is almost
double of that in the alpha particle. The energy surface as the function of the
relative distance of two alpha particles becomes much steeper in an inner
region by the inclusion of the tensor correlation in the wave function of the
alpha particle. This is caused by the p-state mixing induced by the tensor
correlation. By superposing the wave function with different relative
distances, the reasonable binding energy of 8Be is obtained.


title:
Nuclear mass systematics by complementing the Finite Range Droplet Model
  with neural networks

abstract:
  A neural-network model is developed to reproduce the differences between
experimental nuclear mass-excess values and the theoretical values given by the
Finite Range Droplet Model. The results point to the existence of subtle
regularities of nuclear structure not yet contained in the best
microscopic/phenomenological models of atomic masses. Combining the FRDM and
the neural-network model, we create a hybrid model with improved predictive
performance on nuclear-mass systematics and related quantities.


title:
Level excitation and transition probabilities of some nuclei in the
  lower fp-shell

abstract:
  Unrestricted shell model calculations in the lower $fp$-shell region for the
nuclei $^{46}$Ti, $^{46}$Cr and $^{46}$V have been performed for the isovector
T=1 positive parity states using the shell model code OXBASH for Windows by
employing the effective interactions GXPF1, FPD6 and KB3G. The level schemes
and transition strengths $B$($E$2;$\downarrow$) are compared with the recently
available experimental data. A very good agreement were obtained for all
nuclei.


title:
Half lives of spherical proton emitters using density dependent M3Y
  interaction

abstract:
  The proton radioactivity lifetimes of spherical proton emitters from the
ground and the isomeric states are calculated using the microscopic
nucleon-nucleus interaction potentials. The daughter nuclei density
distributions are folded with a realistic density dependent M3Y effective
interaction supplemented by a zero-range pseudo-potential. The density
dependence parameters of the interaction are extracted from the nuclear matter
calculations. The saturation energy per nucleon used for nuclear matter
calculations is determined from the co-efficient of the volume term of
Bethe-Weizsacker mass formula which is evaluated by fitting the recent
experimental and estimated atomic mass excesses from Audi-Wapstra-Thibault
atomic mass table by minimizing the mean square deviation. The quantum
mechanical tunneling probability is calculated within the WKB approximation.
Spherical charge distributions are used for calculating the Coulomb interaction
potentials. These calculations provide good estimates for the observed proton
radioactivity lifetimes.


title:
Continuum RPA study of the incoherent mu-e conversion rate and its
  spurious 1- admixture

abstract:
  The incoherent transition strength of the exotic mu-e conversion in the 208Pb
nucleus is investigated by utilizing the Continuum RPA method, appropriate for
the evaluation of the rate that goes to the continuum of the nuclear spectrum.
We find that the contribution of resonances lying high in the continuum is not
negligible. Special attention is paid to the detailed study of the pronounced
1- contribution which, according to previous calculations, dominates the
overall incoherent rate in about all the nuclear targets. The spurious center
of mass admixture to the partial rate originating from the 1- excitations is
explored, and its elimination is performed by correcting properly the dipole
operators. The results found this way show that the greatest portion of the
total 1- contribution to the incoherent rate is spurious.


title:
New Cooperative 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 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: Parton cascade and coalescence

abstract:
  This is a review of the parton cascade approach and its implications on
parton coalescence at RHIC.


title: Origin of three-body resonances

abstract:
  We expose the relation between the properties of the three-body continuum
states and their two-body subsystems. These properties refer to their bound and
virtual states and resonances, all defined as poles of the $S$-matrix. For one
infinitely heavy core and two non-interacting light particles, the complex
energies of the three-body poles are the sum of the two two-body complex
pole-energies. These generic relations are modified by center-of-mass effects
which alone can produce a Borromean system. We show how the three-body states
evolve in $^6$He, $^6$Li, and $^6$Be when the nucleon-nucleon interaction is
continuously switched on. The schematic model is able to reproduce the main
properties in their spectra. Realistic calculations for these nuclei are shown
in detail for comparison. The implications of a core with non-zero spin are
investigated and illustrated for $^{17}$Ne ($^{15}$O+p+p). Dimensionless units
allow predictions for systems of different scales.


title: Anatomy of three-body decay III. Energy distributions

abstract:
  We address the problem of calculating momentum distributions of particles
emerging from the three-body decay of a many-body resonance. We show that these
distributions are determined by the asymptotics of the coordinate-space
complex-energy wave-function of the resonance. We use the hyperspherical
adiabatic expansion method where all lengths are proportional to the
hyperradius. The structures of the resonances are related to different decay
mechanisms. For direct decay all inter-particle distances increase proportional
to the hyperradius at intermediate and large distances. Sequential three-body
decay proceeds via spatially confined quasi-stationary two-body configurations.
Then two particles remain close while the third moves away. The wave function
may contain mixtures which produce coherence effects at small distances, but
the energy distributions can still be added incoherently. Two-neutron halos are
discussed in details and illustrated by the $2^+$ resonance in $^{6}$He. The
dynamic evolution of the decay process is discussed.


title: Argon spectral function and neutrino interactions

abstract:
  The argon spectral function is constructed and applied to neutrino-argon
cross section computations in the plane wave impulse approximation with the
Pauli blocking final state interaction effect taken into account. The
approximations of the construction method are critically analyzed using the
example of oxygen for which more detailed computations are available. An
effective description of nucleus based on the information contained in a
spectral function is proposed. It is demonstrated that its predictions are
close to those obtained from the complete spectral function. The effective
description can be easily applied in Monte Carlo event generators.


title: Color superconductivity and the strange quark

abstract:
  At ultra-high density, matter is expected to form a degenerate Fermi gas of
quarks in which there is a condensate of Cooper pairs of quarks near the Fermi
surface: color superconductivity. In these proceedings I review some of the
underlying physics, and discuss outstanding questions about the phase structure
of ultra-dense quark matter.


title:
Analysis of the $^6$He $\beta$ decay into the $\alpha+d$ continuum
  within a three-body model

abstract:
  The beta-decay process of the $^6$He halo nucleus into the alpha+d continuum
is studied in a three-body model. The $^6$He nucleus is described as an
alpha+n+n system in hyperspherical coordinates on a Lagrange mesh. The
convergence of the Gamow-Teller matrix element requires the knowledge of wave
functions up to about 30 fm and of hypermomentum components up to K=24. The
shape and absolute values of the transition probability per time and energy
units of a recent experiment can be reproduced very well with an appropriate
alpha+d potential. A total transition probability of 1.6E-6 s$^{-1}$ is
obtained in agreement with that experiment. Halo effects are shown to be very
important because of a strong cancellation between the internal and halo
components of the matrix element, as observed in previous studies. The
forbidden bound state in the alpha+d potential is found essential to reproduce
the order of magnitude of the data. Comments are made on R-matrix fits.


title: Hyperon production in near threshold nucleon-nucleon collisions

abstract:
  We study the mechanism of the associated Lambda-kaon and Sigma-kaon
production in nucleon-nucleon collisions over an extended range of near
threshold beam energies within an effective Lagrangian model, to understand of
the new data on pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions published
recently by the COSY-11 collaboration. In this theory, the hyperon production
proceeds via the excitation of N*(1650), N*(1710), and N*(1720) baryonic
resonances. Interplay of the relative contributions of various resonances to
the cross sections, is discussed as a function of the beam energy over a larger
near threshold energy domain. Predictions of our model are given for the total
cross sections of pp --> p Sigma+K0, pp --> n Sigma+K+, and pn --> n Lambda K+
reactions.


title: The nuclear density of states and the role of the residual interaction

abstract:
  We discuss the role of mean-field and moment methods in microscopic models
for calculating the nuclear density of states (also known as the nuclear level
density). Working in a shell-model framework, we use moments of the nuclear
many-body Hamiltonian to illustrate the importance of the residual interaction
for accurate representations.


title:
Nuclear Equation of State: Picture from Medium Energy Heavy Ion
  Collisions

abstract:
  Characteristics of the nuclear equation of state (EOS) and its importance, in
particular for astrophysics, are discussed. Selected observables in nuclear
collisions are sensitive to the EOS and can be used to constrain it. For
central collisions, these include collective flow asymmetries, subthreshold
kaon yields and isospin diffusion. Comparisons between the data and transport
theory suggest an energy per nucleon that rises relatively slowly with density
for symmetric matter and symmetry energy that rises relatively quickly around
the normal nuclear density.


title: Coupled channel study of $K^+\Lambda$ photoproduction

abstract:
  A coupled channel model with $\gamma N$, $KY$ and $\pi N$ channels has been
used to analyze the recent data of $\gamma p \to K^+ \Lambda$. The non-resonant
interactions within the subspace $KY \oplus \pi N$ are derived from effective
Lagrangians using a unitary transformation method. The direct photoproduction
reaction is obtained from a chiral constituent quark model with $SU(6)\otimes
O(3)$ breaking. Missing baryon resonances issues are briefly discussed.


title:
Probing surface diffuseness of nucleus-nucleus potential with
  quasielastic scattering at deep sub-barrier energies

abstract:
  We perform a systematic study on the surface property of nucleus-nucleus
potential in heavy-ion reactions using large-angle quasielastic scattering at
energies well below the Coulomb barrier. At these energies, the quasielastic
scattering can be well described by a single-channel potential model.
Exploiting this fact, we point out that systems which involve spherical nuclei
require the diffuseness parameter of around 0.60 fm in order to fit the
experimental data, while systems with a deformed target between 0.8 fm and 1.1
fm.


title: Scaling Factor Inconsistencies in Neutrinoless Double Beta Decay

abstract:
  The modern theory of neutrinoless double beta decay includes a scaling factor
that has often been treated inconsistently in the literature. The nuclear
contribution to the decay half life can be suppressed by 15-20% when scaling
factors are mismatched. Correspondingly, $<m_{\nu}>$ is overestimated.


title: Modern topics in theoretical nuclear physics

abstract:
  Over the past five years there have been profound advances in nuclear physics
based on effective field theory and the renormalization group. In this brief,
we summarize these advances and discuss how they impact our understanding of
nuclear systems and experiments that seek to unravel their unknowns. We discuss
future opportunities and focus on modern topics in low-energy nuclear physics,
with special attention to the strong connections to many-body atomic and
condensed matter physics, as well as to astrophysics. This makes it an exciting
era for nuclear physics.


title: Nuclear expansion with excitation

abstract:
  The expansion of an isolated hot spherical nucleus with excitation energy and
its caloric curve are studied in a thermodynamic model with the SkM* force as
the nuclear effective two-body interaction. The calculated results are shown to
compare well with the recent experimental data from energetic nuclear
collisions. The fluctuations in temperature and density are also studied. They
are seen to build up very rapidly beyond an excitation energy of 9 MeV/u.
Volume-conserving quadrupole deformation in addition to expansion indicates,
however, nuclear disassembly above an excitation energy of 4 MeV/u


title:
Proton radii of 4,6,8He isotopes from high-precision nucleon-nucleon
  interactions

abstract:
  Recently, precision laser spectroscopy on 6He atoms determined accurately the
isotope shift between 4He and 6He and, consequently, the charge radius of 6He.
A similar experiment for 8He is under way. We have performed large-scale ab
initio calculations for 4,6,8He isotopes using high-precision nucleon-nucleon
(NN) interactions within the no-core shell model (NCSM) approach. With the
CD-Bonn 2000 NN potential we found point-proton root-mean-square (rms) radii of
4He and 6He 1.45(1) fm and 1.89(4), respectively, in agreement with experiment
and predict the 8He point proton rms radius to be 1.88(6) fm. At the same time,
our calculations show that the recently developed nonlocal INOY NN potential
gives binding energies closer to experiment, but underestimates the charge
radii.


title: Three-body continuum states on a Lagrange mesh

abstract:
  Three-body continuum states are investigated with the hyperspherical method
on a Lagrange mesh. The $R$-matrix theory is used to treat the asymptotic
behaviour of scattering wave functions. The formalism is developed for neutral
as well as for charged systems. We point out some specificities of continuum
states in the hyperspherical method. The collision matrix can be determined
with a good accuracy by using propagation techniques. The method is applied to
the $^6$He (=$\alpha$+n+n) and $^6$Be (=$\alpha$+p+p) systems, as well as to
$^{14}$Be (=$^{12}$Be+n+n). For $^6$He, we essentially recover results of the
literature. Application to $^{14}$Be suggests the existence of an excited $2^+$
state below threshold. The calculated B(E2) value should make this state
observable with Coulomb excitation experiments.


title:
Parameter-Free Solution of the Bohr Hamiltonian for Actinides Critical
  in the Octupole Mode

abstract:
  An analytic, parameter-free (up to overall scale factors) solution of the
Bohr Hamiltonian involving axially symmetric quadrupole and octupole
deformations, as well as an infinite well potential, is obtained, after
separating variables in a way reminiscent of the Variable Moment of Inertia
(VMI) concept. Normalized spectra and B(EL) ratios are found to agree with
experimental data for 226-Ra and 226-Th, the nuclei known to lie closest to the
border between octupole deformation and octupole vibrations in the light
actinide region.


title: Sound Wave in Hot Dense Matter Created in Heavy Ion Collision

abstract:
  A model to study the sound wave in hot dense matter created in heavy ion
collisions by jet is proposed.The preliminary data of jet shape analysis of
PHENIX Collaboration for all centralities and two directions is well explained
in this model. Then the wavelength of the sound wave, the natural frequency of
the hot dense matter and the speed of sound wave are estimated from the fit.


title:
Dipole and Quadrupole electroexcitations of the isovector T=1
  particle-hole states in C-12

abstract:
  Electroexcitations of the dominantly T=1 particle-hole states of C-12 are
studied in the framework of the harmonic oscillator shell model. All possible
T=1 single-particle-hole states of all allowed angular momenta are considered
in a basis including single-particle states up to the 1f-2p shell. The
Hamiltonian is diagnoalized in this space in the presence of the modified
surface delta interaction. Correlation in the ground state wave functions by
mixing more than one configuration is considered and shows a major contribution
that leads to enhance the calculations of the form factors. A comparison with
the experiment shows that this model is able to fit the location of states and
a simple scaling of the results give a good fit to the experimental form
factors.


title: Recent progress on understanding "pasta" phases in dense stars

abstract:
  In cores of supernovae and crusts of neutron stars, nuclei can adopt
interesting shapes, such as rods or slabs, etc., which are referred to as
nuclear "pasta." Recently, we have been studying the pasta phases focusing on
their dynamical aspects with quantum molecular dynamic (QMD) approach. We
review our findings on the following topics: dynamical formation of the pasta
phases by cooling down the hot uniform nuclear matter; a phase diagram on the
density versus temperature plane; structural transitions between the pasta
phases induced by compression and their mechanism. Properties of the nuclear
interaction used in our works are also discussed.