title:
Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and
  p(gamma,K^0)Sigma^+ reactions at forward kaon angles

abstract:
  An effective-Lagrangian framework for K Sigma photoproduction from the proton
is presented. The proposed model is applicable at forward kaon angles and
photon lab energies from threshold up to 16 GeV. The high-energy part of the
p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ amplitudes is expressed in terms of
Regge-trajectory exchange in the t channel. By supplementing this Regge
background with a number of s-channel resonances, the model is extended towards
the resonance region. The resulting ``Regge-plus-resonance'' (RPR) approach has
the advantage that the background contributions involve only a few parameters,
which can be largely constrained by the high-energy data. This work compares
various implementations of the RPR model, and explores which resonance
contributions are required to fit the data presently at hand. It is
demonstrated that, through the inclusion of one K and two K* trajectories, the
RPR framework provides an efficient and unified description of the K^+ Sigma^0
and K^0 Sigma^+ photoproduction channels over an extensive energy range.


title: Effective Field Theory for Dilute Fermions with Pairing

abstract:
  Effective field theory (EFT) methods for a uniform system of fermions with
short-range, natural interactions are extended to include pairing correlations,
as part of a program to develop a systematic Kohn-Sham density functional
theory (DFT) for medium and heavy nuclei. An effective action formalism for
local composite operators leads to a free-energy functional that includes
pairing by applying an inversion method order by order in the EFT expansion. A
consistent renormalization scheme is demonstrated for the uniform system
through next-to-leading order, which includes induced-interaction corrections
to pairing.


title: A Bose-Einstein Model of Particle Multiplicity Distributions

abstract:
  A model of particle production is developed based on a parallel with a theory
of Bose-Einstein condensation and similarities with other critical phenomena
such as critical opalescence. The role of a power law critical exponent tau and
Levy index alpha are studied. Various features of this model are developed and
compared with other commonly used models of particle production which are shown
to differ by having different values for tau, alpha. While void scaling is a
feature of this model, hierarchical structure is not a general property of it.
The value of the exponent tau=2 is a transition point associated with void and
hierarchical scaling features. An exponent gamma is introduced to describe
enhanced fluctuations near a critical point. Experimentally determined
properties of the void scaling function can be used to determine tau.


title:
Proton Threshold States in the 22Na(p,gamma)23Mg Reaction and
  Astrophysical Implications

abstract:
  Proton threshold states in 23Mg are important for the astrophysically
relevant proton capture reaction 22Na(p,gamma)23Mg. In the indirect
determination of the resonance strength of the lowest states, which were not
accessible by direct methods, some of the spin-parity assignments remained
experimentally uncertain. We have investigated these states with Shell Model,
Coulomb displacement, and Thomas-Ehrman shift calculations. From the comparison
of calculated and observed properties we relate the lowest relevant resonance
state at E=7643 keV to an excited 3/2+ state in accordance with a recent
experimental determination by Jenkins et al.. From this we deduce significantly
improved values for the 22Na(p,gamma)23Mg reaction rate at stellar temperatures
below T_9=0.1K.


title:
Super-allowed alpha-decay above doubly-magic 100Sn and properties of
  104Te = 100Sn otimes alpha

abstract:
  Alpha-decay half-lives for 104,105,106Te and 108,109,110Xe close above the
doubly-magic 100Sn are calculated from systematic double-folding potentials.
The derived alpha preformation factors are compared to results for
212,213,214Po and 216,217,218Rn above the doubly-magic 208Pb. Alpha-decay
energies of Q_alpha = 5.42 \pm 0.07 MeV and 4.65 \pm 0.15 MeV are predicted for
104Te and 108Xe; the corresponding half-lives are T_{1/2} approx 5 ns for 104Te
and of the order of 60 \mu s for 108Xe. Additionally, the properties of
rotational bands in 104Te are analyzed, and the first excited 2+ state in 104Te
is predicted at E_x = 650 \pm 40 keV; it decays preferentially by gamma
emission with a reduced transition strength of 10 Weisskopf units to the ground
state of 104Te and with a minor branch by alpha emission to the ground state of
100Sn.


title: The Phase Diagram of Neutral Quark Matter

abstract:
  In this thesis, I study the phase diagram of dense, locally neutral
three-flavor quark matter as a function of the strange quark mass, the quark
chemical potential, and the temperature, employing a general nine-parameter
ansatz for the gap matrix. I also study the phase diagram of dense, locally
neutral three-flavor quark matter within the framework of a Nambu-Jona-Lasinio
(NJL) model. In the analysis, dynamically generated quark masses are taken into
account self-consistently. The phase diagram in the plane of temperature and
quark chemical potential is presented. In addition, I study the effect of
neutrino trapping on the phase diagram of dense, locally neutral three-flavor
quark matter within the same NJL model. The phase diagrams in the plane of
temperature and quark chemical potential, as well as in the plane of
temperature and lepton-number chemical potential are presented. The
implications of these results for the evolution of protoneutron stars are
briefly discussed.


title: Correlation Effects on the Charge Radii of Exotic Nuclei

abstract:
  The structures and distributions of light nuclei are investigated within a
microscopic correlation model. Two particle correlations are responsible for
the scattering of model particles either to low momentum- or to high
momentum-states. The low momentum states form the model space while the high
momentum states are used to calculate the G-matrix. The three and higher order
particle correlations do not play a role in the latter calculation especially
if the correlations induced by the scattering operator are of sufficient short
range. They modify however, via the long tail of the nuclear potential, the
Slater determinant of the (A) particles by generating excited Slater's
determinants.


title: The piNN system - recent progress

abstract:
  Recent progress towards an understanding of the piNN system within chiral
perturbation theory is reported. The focus lies on an effective field theory
calculation and its comparison to phenomenological calculations for the
reaction NN->d pi. In addition, the resulting absorptive and dispersive
corrections to the pi-d scattering length are discussed briefly.


title:
Momentum conservation and correlation analyses in heavy-ion collisions
  at ultrarelativistic energies

abstract:
  Global transverse-momentum conservation induces correlations between any
number of particles, which contribute in particular to the two- and
three-particle correlations measured in heavy-ion collisions. These
correlations are examined in detail, and their importance for studies of jets
and their interaction with the medium is discussed.


title: Superdeformation and hyperdeformation in the $^{108}$Cd nucleus

abstract:
  The superdeformation and hyperdeformation in $^{108}$Cd have been studied for
the first time within the framework of the fully self-consistent cranked mean
field theory, namely, cranked relativistic mean field theory. The structure of
observed superdeformed bands 1 and 2 have been analyzed in detail. The bumps
seen in their dynamic moments of inertia are explained as arising from unpaired
band crossings. This is contrary to an explanation given earlier within the
framework of projected shell model. It was also concluded that this nucleus is
not doubly magic SD nucleus.


title: Superheavy Nuclei: Relativistic Mean Field Outlook

abstract:
  The analysis of quasiparticle spectra in heaviest $A\sim 250$ nuclei with
spectroscopic data provides an additional constraint for the choice of
effective interaction for the description of superheavy nuclei. It strongly
suggest that only the parametrizations of the relativistic mean field
Lagrangian which predict Z=120 and N=172 as shell closures are reliable for
superheavy nuclei. The influence of the central depression in the density
distribution of spherical superheavy nuclei on the shell structure is studied.
Large central depression produces large shell gaps at Z=120 and N=172. The
shell gaps at Z=126 and N=184 are favored by a flat density distribution in the
central part of nucleus. It is shown that approximate particle number
projection (PNP) by means of the Lipkin-Nogami method removes pairing collapse
seen at these gaps in the calculations without PNP.


title: High-spin structures as the probes of proton-neutron pairing

abstract:
  Rotating $N=Z$ nuclei in the mass $A=58-80$ region have been studied within
the framework of isovector mean field theory. Available data is well and
systematically described in the calculations. The present study supports the
presence of strong isovector $np$ pair field at low spin, which is, however,
destroyed at high spin. No clear evidence for the existence of the isoscalar
$t=0$ $np$ pairing has been found.


title:
Central depression in nuclear density and its consequences for the shell
  structure of superheavy nuclei

abstract:
  The influence of the central depression in the density distribution of
spherical superheavy nuclei on the shell structure is studied within the
relativistic mean field theory. Large depression leads to the shell gaps at the
proton Z=120 and neutron N=172 numbers, while flatter density distribution
favors N=184 for neutrons and leads to the appearance of a Z=126 shell gap and
to the decrease of the size of the Z=120 shell gap. The correlations between
the magic shell gaps and the magnitude of central depression are discussed for
relativistic and non-relativistic mean field theories.


title:
Predictions for two-pion correlations for sqrt{s}=14 TeV proton-proton
  collisions

abstract:
  A simple model based on relativistic geometry and final-state hadronic
rescattering is used to predict pion source parameters extracted in two-pion
correlation studies of proton-proton collisions at sqrt{s}=14 TeV. By comparing
the results of these model studies with data, it might be possible to obtain
information on the hadronization time in these collisions. As a test of this
model, comparisons between existing two-pion correlation data at sqrt{s}= 1.8
TeV and results from the model are made. It is found at this lower energy that
using a short hadronization time in the model best describes the trends of the
data.


title:
qqqbar to qqqbar and qqbarqbar to qqbarqbar Elastic Scatterings and
  Thermalization of Quark Matter and Antiquark Matter

abstract:
  Thermalization of quark matter and antiquark matter is studied with
quark-quark-antiquark as well as quark-antiquark-antiquark elastic scatterings.
Squared amplitudes of qqqbar to qqqbar and qqbarqbar to qqbarqbar at order
alpha_s^4 are derived in perturbative QCD. Solved by a new technique, solutions
of transport equations with the squared amplitudes indicate that the
scatterings qqqbar to qqqbar and qqbarqbar to qqbarqbar shorten the
thermalization time of quark matter and antiquark matter. It is emphasized that
three-parton and other multi-parton scatterings become important at the high
parton number density achieved in RHIC Au-Au collisions.


title: Nuclear rainbow scattering and nucleus-nucleus potential

abstract:
  Elastic scattering of alpha-particle and some tightly-bound light nuclei has
shown the pattern of rainbow scattering at medium energies, which is due to the
refraction of the incident wave by a strongly attractive nucleus-nucleus
potential. This review gives an introduction to the physics of the nuclear
rainbow based essentially on the optical model description of the elastic
scattering. Since the realistic nucleus-nucleus optical potential (OP) is the
key to explore this interesting process, an overview of the main methods used
to determine the nucleus-nucleus OP is presented. The refractive rainbow-like
structures observed in other quasi-elastic scattering reactions have also been
discussed. Some evidences for the refractive effect in the elastic scattering
of unstable nuclei are presented and perspectives for the future studies are
discussed.


title: Exactly separable version of X(5) and related models

abstract:
  One-parameter exactly separable versions of the X(5) and X(5)-beta^2 models,
labelled as ES-X(5) and ES-X(5)-beta^2 respectively, are derived by using in
the Bohr Hamiltonian potentials of the form u(beta)+u(gamma)/beta^2. Unlike
X(5), in these models the beta_1 and gamma_1 bands are treated on equal
footing. Spacings within the gamma_1 band are well reproduced by both models,
while spacings within the beta_1 band are well reproduced only by
ES-X(5)-beta^2, for which several nuclei with R_{4/2}=E(4_1^+)/E(2_1^+) ratios
and [normalized to E(2_1^+)] beta_1 and gamma_1 bandheads corresponding to the
model predictions have been found.


title:
Kaon-Nucleon scattering lengths from the experiments on kaonic hydrogen
  and kaonic deuterium

abstract:
  Within the framework of a low-energy effective field theory we consider the
procedure of extraction of the S-wave kaon-nucleon scattering lengths a0 and a1
from a combined fit to the kaonic hydrogen and kaonic deuterium data. It is
demonstrated that, if the present DEAR central values for the kaonic hydrogen
ground-state energy and width are used in the analysis of the data, a solution
for a0 and a1 exists only in a restricted domain of input values for the
kaon-deuteron scattering length. We therefore conclude that forthcoming
measurement of this scattering length imposes stringent constraints on the
theoretical description of the kaon-deuteron interactions at low energies.


title:
Estimating total cross sections from neutron-nucleus collisions using a
  simple functional form

abstract:
  Total cross sections for neutron scattering from nuclei, with energies
ranging from 10 to 600 MeV and from many nuclei spanning the mass range 6Li to
238U, have been analyzed using a simple, three-parameter, functional form. The
calculated cross sections are compared with results obtained by using
microscopic (g-folding) optical potentials as well as with experimental data.
The functional form reproduces those total cross sections very well. When
allowance is made for Ramsauer-like effects in the scattering, the parameters
of the functional form required vary smoothly with energy and target mass. They
too can be represented by functions of energy and mass.


title: Two-photon exchange at low Q^2

abstract:
  We study two-photon exchange for elastic electron-proton scattering at low
Q^2. Compact approximate formulae for the amplitudes are obtained. Numerical
calculations are done for Q^2 < 0.1 GeV^2 with several realistic form factor
parameterizations, yielding similar results. They indicate that the corrections
to magnetic form factor can visibly affect cross-section and proton radii. For
low-Q^2 electron-neutron scattering two-photon exchange corrections are shown
to be negligibly small.


title: Universal chemical freeze-out as a phase transition signature

abstract:
  It is shown that kinetic freeze-out in relativistic heavy-ion collisions
invariably entails a non-trivial dependence of the freeze-out temperature on
the collision centrality. The centrality independence of the chemical
freeze-out temperature observed in Au+Au collisions at RHIC is therefore
inconsistent with the hypothesis that hadron abundances decouple kinetically
from inelastic hadron-hadron interactions. On the other hand, it is consistent
with the hypothesis that chemical decoupling is driven by the quark-hadron
phase transition, and that the observed universal chemical freeze-out reflects
its critical temperature, independent of the dynamical state of the collision
fireball as it passes through the phase transition.


title:
Shell-model study of mirror nuclei with modern charge-dependent
  \textit{NN} potential

abstract:
  The properties of $T=1/2$ mirror nuclei in the $fp$ shell have been studied
with a microscopic residual interaction. The isospin-nonconserving interaction
is derived from a high-precision charge-dependent Bonn \textit{NN} potential
using the folded-diagram renormalization method. The level structures of the
nuclei are calculated, obtaining excellent agreements with experimental
observations till the $0f_{7/2}$ band termination. The role played by isospin
symmetry breaking on ground-state displacement energies and mirror energy
differences is discussed, which may help to explain the long-standing
Nolen-Schiffer anomaly. Electromagnetic and weak transition properties are
presented, with discussions on the asymmetry in analogous transitions.


title: Phase Structure of Compact Star in Modified Quark-Meson Coupling Model

abstract:
  The K$^-$ condensation and quark deconfinement phase transitions are
investigated in the modified quark-meson coupling model. It is shown that K$^-$
condensation is suppressed because of the quark deconfinement when
$B^{1/4}<$202.2MeV, where $B$ is the bag constant for unpaired quark matter.
With the equation of state (EOS) solved self-consistently, we discuss the
properties of compact stars. We find that the EOS of pure hadron matter with
condensed K$^-$ phase should be ruled out by the redshift for star EXO0748-676,
while EOS containing unpaired quark matter phase with $B^{1/4}$ being about
180MeV could be consistent with this observation and the best measured mass of
star PSR 1913+16. We then probe into the change of the phase structures in
possible compact stars with deconfinment phase as the central densities
increase. But if the recent inferred massive star among Terzan 5 with
M$>$1.68M$_{\odot}$ is confirmed, all the present EOSes with condensed phase
and deconfined phase would be ruled out and therefore these exotic phases are
unlikely to appear within neutron stars.


title:
Deuteron Polarization Observables in Elastic $\vec{d}p$ Scattering at
  Intermediate Energies

abstract:
  A calculation of vector and tensor polarization observables of a deuteron in
an optical potential framework for elastic proton-deuteron scattering at the
incident deuteron energy $E_d=880$ MeV is presented. The main aim is to point
out the role of various effects in explaining the wide-range angle distribution
of these observables. Under the investigation are a double-scattering mechanism
in the optical potential, the influence of various $NN$-partial waves and as
well a comparison of calculations with two different deuteron wave-functions
derived from the Bonn-CD $NN$-potential model and dressed bag model of
Moscow-Tuebingen group.


title:
Negative parity states of $^{11}$B and $^{11}$C and the similarity with
  $^{12}C

abstract:
  The negative parity states of $^{11}$B and $^{11}$C were studied based on the
calculations of antisymmetrized molecular dynamics(AMD). The calculations well
reproduced the experimental strengths of Gamov-Teller(GT), $M1$ and monopole
transitions. We, especially, focused on the $3/2^-_3$ and $5/2^-_2$ states, for
which GT transition strengths were recently measured. The weak $M1$ and GT
transitions for the $3/2^-_3$ in $^{11}$B and $^{11}$C are described by a
well-developed cluster structure of $2\alpha$+$t$ and $2\alpha$+$^3$He,
respectively, while the strong transitions for the $5/2^-_2$ is characterized
by an intrinsic spin excitation with no cluster structure. It was found that
the $3/2^-_3$ state is a dilute cluster state, and its features are similar to
those of the $^{12}$C$(0^+_2)$ which is considered to be a gas state of three
$\alpha$ clusters.


title: Strange dibaryon and KNN-pi Sigma N coupled channel equation

abstract:
  KNN three body resonance has been studied by KNN-pi Sigma N coupled channel
Faddeev equation. The S-matrix pole has been investigated using the
analytically continued scattering amplitude on the unphysical Riemann sheet. As
a result we found a three-body resonance of strange dibaryon system with the
binding energy and width B=76MeV and \Gamma=54MeV.


title: What Do Electromagnetic Plasmas Tell Us about Quark-Gluon Plasma?

abstract:
  Since the quark-gluon plasma (QGP) reveals some obvious similarities to the
well-known electromagnetic plasma (EMP), an accumulated knowledge on EMP can be
used in the QGP studies. After discussing similarities and differences of the
two systems, we present theoretical tools which are used to describe the
plasmas. The tools include: kinetic theory, hydrodynamic approach and
diagrammatic perturbative methods. We consider collective phenomena in the
plasma with a particular emphasis on instabilities which crucially influence
temporal evolution of the system. Finally, properties of strongly coupled
plasma are discussed.


title:
Contribution of spin 1/2 and 3/2 resonances to two-photon exchange
  effects in elastic electron-proton scattering

abstract:
  We calculate contributions of hadron resonances to two-photon exchange
effects in electron-proton scattering. In addition to the nucleon and P33
resonance, the following heavier resonances are included as intermediate states
in the two-photon exchange diagrams: D13, D33, P11, S11 and S31. We show that
the corrections due to the heavier resonances are smaller that the dominant
nucleon and P33 contributions. We also find that there is a partial
cancellation between the contributions from the spin 1/2 and spin 3/2
resonances, which results in a further suppression of their aggregate
two-photon exchange effect.


title:
Gauge-Invariant Formulation of Adiabatic Self-Consistent Collective
  Coordinate Method

abstract:
  The adiabatic self-consistent collective coordinate (ASCC) method is a
practical microscopic theory of large-amplitude collective motions in nuclei
with superfluidity. We show that its basic equations are invariant against
transformations involving the gauge angle in the particle-number space. By
virtue of this invariance, a clean separation between the large-amplitude
collective motion and the pairing rotational motion can be achieved, enabling
us to restore the particle-number symmetry broken by the
Hartree-Fock-Bogoliubov (HFB) approximation. We formulate the ASCC method
explicitly in a gauge-invariant form. In solving the ASCC equations, it is
necessary to fix the gauge. Applying this new formulation to the multi-O(4)
model, we compare different gauge-fixing procedures and demonstrate that
calculations using different gauges indeed yield the same results for
gauge-invariant quantities, such as the collective path and quantum spectra. We
suggest a gauge-fixing prescription that seems most convenient in realistic
calculations.


title:
A fully relativistic description of Hypernuclear production in proton-
  and pion-Nucleus Collisions

abstract:
  Exclusive A(p,K^+){_\Lambda}B and A(\pi,K^+){_\Lambda}B^\prime reactions
leading to two body final states, have been investigated in a fully covariant
model based on an effective Lagrangian picture. The explicit kaon production
vertex is described via creation, propagation and decay into relevant channel
of N*(1650), N*(1710) and N*(1720) intermediate baryonic resonance states, in
the initial collision of the projectile with one of the target nucleons. The
bound state wave functions are obtained by solving the Dirac equation with
appropriate scalar and vector potentials. The calculated cross sections show
strong sensitivity to the final hypernuclear state excited in the reaction.
Cross sections of 1 - 2 nb/sr are obtained at peak positions of favored
transitions in case of the A(p,K^+){_\Lambda}B reaction on heavier targets.


title: Spin 1/2 Fermions in the Unitary Limit

abstract:
  The energy shift due to the interaction of two particles in a large box is
proportional to the free particle scattering phase-shift. This provides an
approximation to the effective interaction referred to as the phase-shift
approximation. For a many-body fermion system this effective interaction has to
be corrected for the Pauli-blocking. It is used to calculate the energy of a
spin 1/2 fermion system as a function of the two-body scattering length and
effective range. In the unitary limit with scattering length going to infinity
and effective range going to zero the energy is 0.540 (in the units of the
non-interactiong fermi gas energy) with a pp-ladder summation. Including
hh-ladders the energy is 0.570. A smooth crossover from the BCS to the BEC
region is observed. Pairing is not included.


title: Multipole approach for photo- and electroproduction of kaon

abstract:
  We have analyzed the experimental data on K+Lambda photoproduction by using a
multipole approach. In this analysis we use the background amplitudes
constructed from appropriate Feynman diagrams in a gauge-invariant and
crossing-symmetric fashion. Results of our analysis reveal the problem of
mutual consistency between the new SAPHIR and CLAS data. We found that the
problem could lead to different conclusions on ``missing resonances''. We have
also extended our analysis to the finite Q^2 region and compared the result
with the corresponding electroproduction data.


title: Quadrupole collective variables in the natural Cartan-Weyl basis

abstract:
  The matrix elements of the quadrupole collective variables, emerging from
collective nuclear models, are calculated in the natural Cartan-Weyl basis of
O(5) which is a subgroup of a covering $SU(1,1)\times O(5)$ structure. Making
use of an intermediate set method, explicit expressions of the matrix elements
are obtained in a pure algebraic way, fixing the $\gamma$-rotational structure
of collective quadrupole models.


title: Schwinger functions and light-quark bound states

abstract:
  We examine the applicability and viability of methods to obtain knowledge
about bound-states from information provided solely in Euclidean space.
Rudimentary methods can be adequate if one only requires information about the
ground and first excited state and assumptions made about analytic properties
are valid. However, to obtain information from Schwinger functions about higher
mass states, something more sophisticated is necessary. A method based on the
correlator matrix can be dependable when operators are carefully tuned and
errors are small. This method is nevertheless not competitive when an
unambiguous analytic continuation of even a single Schwinger function to
complex momenta is available.


title: Emission of Scission Neutrons in the Sudden Approximation

abstract:
  At a certain finite neck radius during the descent of a fissioning nucleus
from the saddle to the scission point, the attractive nuclear forces can no
more withstand the repulsive Coulomb forces producing the neck rupture and the
sudden absorption of the neck stubs by the fragments. At that moment, the
neutrons, although still characterized by their pre-scission wave functions,
find themselves in the newly created potential of their interaction with the
separated fragments. Their wave functions become wave packets with components
in the continuum. The probability to populate such states gives evidently the
emission probability of neutrons at scission. In this way, we have studied
scission neutrons for the fissioning nucleus $^{236}$U, using two-dimensional
realistic nuclear shapes. Both the emission probability and the distribution of
the emission points relative to the fission fragments strongly depend on the
quantum numbers of the pre-scission state from which the neutron is emitted. In
particular it was found that states with $\Omega \pi$ = 1/2+ dominate the
emission. Depending on the assumed pre- and post-scission configurations and on
the emission-barrier height, 30 to 50% of the total scission neutrons are
emitted from 1/2+ states. Their emission points are concentrated in the region
between the newly separated fragments. The upper limit for the total number of
neutrons per scission event is predicted to lie between 0.16 and 1.73
(depending on the computational assumptions).


title:
Eta meson production in nucleon-nucleon collisions within an effective
  Lagrangian model

abstract:
  We investigate the pp --> pp eta and pn --> pn eta reactions within an
effective Lagrangian model for laboratory kinetic energies ranging from very
close to eta meson production threshold to about 10 GeV. Production amplitudes
include contributions from the mechanism of excitation, propagation and decay
of N*(1535), N*(1650), and N*(1710) baryonic resonances. The initial
interaction between two incoming nucleons is modeled by the exchange of pi,
rho, omega and sigma mesons where the vertex parameters are taken to be the
same as those used in the previous applications of this model. Parameters of
the resonance vertices also have been taken from our earlier studies wherever
applicable. Calculations have been done for total as well as differential eta
production cross sections. To describe the data for energies closer to the
production threshold final state interactions among the out-going particles
have been included by means of a generalized Watson-Migdal method. Terms
corresponding to the excitation of N*(1535) resonance and pion exchange process
dominate the cross sections. With a single set of vertex parameters our model
is able to describe the available data well on total cross sections for beam
energies ranging from close to threshold to upto 10 GeV.


title:
Electroexcitation of the Roper resonance in the relativistic quark
  models

abstract:
  The amplitudes of the transition gamma* N -> P11(1440) are calculated within
light-front relativistic quark model assuming that the P11(1440) is the first
radial excitation of the 3q ground state. The results are presented along with
the predictions obtained in other relativistic quark models. In comparison with
the previous calculations, we have extended the range of Q^2 up to 4.5 GeV^2 to
cover the kinematic interval of the forthcoming experimental data. Using
approach based on PCAC, we have checked the relative sign between quark model
predictions for the N and P11(1440) contributions to the pion electroproduction
found in previous investigations.


title:
Are low-energy nuclear observables sensitive to high-energy phase
  shifts?

abstract:
  Conventional nucleon-nucleon potentials with strong short-range repulsion
require contributions from high-momentum wave function components even for
low-energy observables such as the deuteron binding energy. This can lead to
the misconception that reproducing high-energy phase shifts is important for
such observables. Interactions derived via the similarity renormalization group
decouple high-energy and low-energy physics while preserving the phase shifts
from the starting potential. They are used to show that high-momentum
components (and high-energy phase shifts) can be set to zero when using
low-momentum interactions, without losing information relevant for low-energy
observables.


title:
Particle-unstable light nuclei with a Sturmian approach that preserves
  the Pauli principle

abstract:
  Sturmian theory for nucleon-nucleus scattering is discussed in the presence
of all the phenomenological ingredients necessary for the description of
weakly-bound (or particle-unstable) light nuclear systems. Currently, we use a
macroscopic potential model of collective nature. The analysis shows that the
couplings to low-energy collective-core excitations are fundamental but they
are physically meaningful only if the constraints introduced by the Pauli
principle are taken into account. The formalism leads one to discuss a new
concept, Pauli hindrance, which appears to be important to understand the
structure of weakly-bound and unbound systems.


title: Spin-orbit splitting and the tensor component of the Skyrme interaction

abstract:
  We study the role of the tensor term of the Skyrme effective interactions on
the spin-orbit splittings in the N=82 isotones and Z=50 isotopes. The different
role of the triplet-even and triplet-odd tensor forces is pointed out by
analyzing the spin-orbit splittings in these nuclei. The experimental isospin
dependence of these splittings cannot be described by Hartree-Fock calculations
employing the usual Skyrme parametrizations, but is very well accounted for
when the tensor interaction is introduced. The capability of the Skyrme forces
to reproduce binding energies and charge radii in heavy nuclei is not destroyed
by the introduction of the tensor term. Finally, we also discuss the effect of
the tensor force on the centroid of the Gamow-Teller states.


title:
Critical point symmetries in boson-fermion systems. The case of shape
  transition in odd nuclei in a multi-orbit model

abstract:
  We investigate phase transitions in boson-fermion systems. We propose an
analytically solvable model (E(5/12)) to describe odd nuclei at the critical
point in the transition from the spherical to $\gamma$-unstable behaviour. In
the model, a boson core described within the Bohr Hamiltonian interacts with an
unpaired particle assumed to be moving in the three single particle orbitals
j=1/2,3/2,5/2. Energy spectra and electromagnetic transitions at the critical
point compare well with the results obtained within the Interacting Boson
Fermion Model, with a boson-fermion Hamiltonian that describes the same
physical situation.


title:
Subtleties of Lorentz Invariance in Relativistic Constituent Quark
  Models of the Nucleon and the Spin-Dependent Quark Density

abstract:
  We study the effects of a barely perceivable violation of Lorentz invariance
on results computed using a relativistic constituent quark model wave function.
The model nucleon wave function of Gross {\it et al.} is constructed such
thatthere is no orbital angular momentum and that the spin-dependent density is
spherical. This model wave function is claimed to be manifestly covariant, but
we show that this is not so. In particular,the seeming covariance of the matrix
elements of the electromagnetic current arises from using the Breit frame.
Matrix elements have a different appearance in any other frame.


title: The Omega Puzzle

abstract:
  Recent data on particles associated with Omega trigger suggest that such
events have jet structure. However, the exponential pT distribution of Omega
suggests that no jets are involved. We resolve this puzzle by suggesting that
the Omega is produced by the recombination of the enhanced thermal partons in
the ridge that can have other hadrons in association with the trigger, all
having exponential pT distributions.


title:
A Refined Numerical Result on the First Excitation Energy in the
  Two-Level Pairing Model

abstract:
  The first excitation energy in the two-level pairing model is investigated in
terms of the equilibrium and the small fluctuation around it. The basic idea is
an extension of results presented in a previous paper by the present authors.
In this investigation, the result obtained in the previous paper plays a
central role: At the limit of the weak and the strong interaction strength, the
results are in good agreement with the exact one. The former and the latter are
calculated in the framework of the $su(2)\otimes su(1,1)$- and the
$su(2)\otimes su(2)$-coherent state, respectively. On the basis of the above
conclusion, the intermediate region for the interaction strength is described
in terms of the idea of the interpolation and it is shown that the agreement of
the result with the exact one is quite good.


title: Shell Model and Mean-Field Description of Band Termination

abstract:
  We study nuclear high-spin states undergoing the transition to the fully
stretched configuration with maximum angular momentum I_max within the space of
valence nucleons. To this end, we perform a systematic theoretical analysis of
non-fully-stretched I_max-2 and I_max-1 f_{7/2}^n seniority isomers and
d_{3/2}^{-1} f_{7/2}^{n+1} intruder states in the A~44 nuclei from the lower-fp
shell. We employ two theoretical approaches: (i) the density functional theory
based on the cranked self-consistent Skyrme-Hartree-Fock method, and (ii) the
nuclear shell model in the full sdfp configuration space allowing for 1p-1h
cross-shell excitations. We emphasize the importance of restoration of broken
angular momentum symmetry inherently obscuring the mean-field treatment of
high-spin states. Overall good agreement with experimental data is obtained.


title:
The role of $\Delta^{++*}(1620)$ resonances in $pp \to nK^+\Sigma^+$
  reaction and its important implications

abstract:
  The $pp \to nK^+\Sigma^+$ reaction is a very good isospin 3/2 filter for
studying $\Delta^{++*}$ decaying to $K^+\Sigma^+$. With an effective Lagrangian
approach, contributions from a previous ignored sub-$K^+\Sigma^+$-threshold
resonance $\Delta^{++*}(1620)1/2^-$ are fully included in addition to those
already considered in previous calculations. It is found that the
$\Delta^{++*}(1620)1/2^-$ resonance gives an overwhelmingly dominant
contribution for energies very close to threshold, with a very important
contribution from the t-channel $\rho$ exchange. This solves the problem that
all previous calculations seriously underestimate the near-threshold cross
section by order(s) of magnitude. Many important implications of the results
are discussed.


title: Strange form factors of the nucleon

abstract:
  The strangeness content of nucleon form factors is analyzed in a
two-component model with a quark-like intrinsic structure surrounded by a meson
cloud. A comparison with the available experimental data from the SAMPLE, PVA4,
HAPPEX and G0 collaborations shows a good overall agreement for the strange
form factors.


title:
Further considerations concerning claims for deeply bound kaon atoms and
  reply to criticisms

abstract:
  We briefly review the experiments of KEK and FINUDA, that claim evidence for
deeply bound kaon states, from the perspective of recent theoretical papers and
experiments that provide an alternative explanation of the peaks seen. At the
same time we show that recent criticisms raised by Akaishi and Yamazaki, and
exposed by Akaishi in this Conference, have no base.


title:
Multi-nucleon correlations in Deep Inelastic Scattering at large Bjorken
  xB

abstract:
  Using realistic nuclear many-body wave functions in the collinear
factorization framework, we evaluate nuclear Deep Inelastic Scattering at large
Bjorken xB, where correlations are needed to exceed the kinematic limits of a
single free nucleon. We find that recent experimental data on cross-section
ratios from the CLAS collaboration exhibit features that are not reproduced by
modern 2- and 3-nucleon correlations in the nuclear wave function. New physical
mechanisms are needed to explain data in the 2<xB<3 range.


title:
Calculation of beta-decay rates in a relativistic model with
  momentum-dependent self-energies

abstract:
  The relativistic proton-neutron quasiparticle random phase approximation
(PN-RQRPA) is applied in the calculation of beta-decay half-lives of
neutron-rich nuclei in the $Z\approx 28$ and $Z\approx 50$ regions. The study
is based on the relativistic Hartree-Bogoliubov calculation of nuclear
ground-states, using effective Lagrangians with density-dependent meson-nucleon
couplings, and also extended by the inclusion of couplings between the
isoscalar meson fields and the derivatives of the nucleon fields. This leads to
a linear momentum dependence of the scalar and vector nucleon self-energies.
The residual QRPA interaction in the particle-hole channel includes the $\pi +
\rho$ exchange plus a Landau-Migdal term. The finite-range Gogny interaction is
employed in the T=1 pairing channel, and the model also includes a
proton-neutron particle-particle interaction. The results are compared with
available data, and it is shown that an extension of the standard relativistic
mean-field framework to include momentum-dependent nucleon self-energies
naturally leads to an enhancement of the effective (Landau) nucleon mass, and
thus to an improved PN-QRPA description of beta-decay rates.


title: Static properties of nuclear matter within the Boson Loop Expansion

abstract:
  The use of the Boson Loop Expansion is proposed for investigating the static
properties of nuclear matter. We explicitly consider a schematic dynamical
model in which nucleons interact with the scalar-isoscalar sigma meson. The
suggested approximation scheme is examined in detail at the mean field level
and at the one- and two-loop orders. The relevant formulas are provided to
derive the binding energy per nucleon, the pressure and the compressibility of
nuclear matter. Numerical results of the binding energy at the one-loop order
are presented for Walecka's sigma-omega model in order to discuss the degree of
convergence of the Boson Loop Expansion.


title: E0 emission in alpha + ^12C fusion at astrophysical energies

abstract:
  We show that E0 emission in alpha + ^12C fusion at astrophysically
interesting energies is negligible compared to E1 and E2 emission.


title: Low-Energy Inelastic Neutrino Reactions on 4He

abstract:
  The inelastic scattering of neutrino off 4He is calculated microscopically at
energies typical for core collapse supernova environment. The calculation is
carried out with the Argonne V18 nucleon--nucleon potential and the Urbana IX
three nucleon force. Full final state interaction is included via the Lorentz
integral transform (LIT) method. The contribution of axial meson exchange
currents to the cross sections is taken into account from effective field
theory of nucleons and pions to order O(Q^3).


title: Nuclear transparencies from photoinduced pion production

abstract:
  We present a relativistic and cross-section factorized framework for
computing nuclear transparencies extracted from A(\gamma,\pi N) reactions at
intermediate energies. The proposed quantummechanical model adopts a
relativistic extension to the multiple-scattering Glauber approximation to
account for the final state interactions of the ejected nucleon and pion. The
theoretical predictions are compared against the experimental ^4He(\gamma,p
\pi^-) data from Jefferson Lab. For those data, our results show no conclusive
evidence for the onset of mechanisms related to color transparency.


title:
Skyrme-HFB Calculations in Coordinate Space for the Krypton Isotopes Up
  to the Two-Neutron Dripline

abstract:
  For axially symmetric even-even nuclei, we solve the Hartree-Fock-Bogoliubov
(HFB) equations on a 2-D grid in cylindrical coordinates. The Skyrme SLy4
interaction is used for the mean field and a zero-range interaction for the
pairing field. After decoupling the HFB lattice equations, we obtain
quasiparticle states with equivalent single-particle energies up to 100 MeV or
more. We present results for the Krypton isotope chain up to the two-neutron
dripline, including two-neutron separation energies, pairing gaps, and
quadrupole deformations for the ground states and isomeric minima.


title: Superscaling in electroweak excitation of nuclei

abstract:
  Superscaling properties of 12C, 16O and 40Ca nuclear responses, induced by
electron and neutrino scattering, are studied for momentum transfer values
between 300 and 700 MeV/c. We have defined two indexes to have quantitative
estimates of the scaling quality. We have analyzed experimental responses to
get the empirical values of the two indexes. We have then investigated the
effects of finite dimensions, collective excitations, meson exchange currents,
short-range correlations and final state interactions. These effects strongly
modify the relativistic Fermi gas scaling functions, but they conserve the
scaling properties. We used the scaling functions to predict electron and
neutrino cross sections and we tested their validity by comparing them with the
cross sections obtained with a full calculation. For electron scattering we
also made a comparison with data. We have calculated the total charge-exchange
neutrino cross sections for neutrino energies up to 300 MeV.


title:
Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions II: Meson
  Spectra and HBT Radii

abstract:
  Causal viscous hydrodynamic fits to experimental data for pion and kaon
transverse momentum spectra from central Au+Au collisions at \sqrt{s_{NN}}=200
GeV are presented. Starting the hydrodynamic evolution at 1 fm/c and using
small values for the relaxation time, reasonable fits up to moderate ratios
\eta/s\simeq 0.4 can be obtained. It is found that a percentage of roughly 50
\eta/s to 75 \eta/s of the final meson multiplicity is due to viscous entropy
production. Finally, it is shown that with increasing viscosity, the ratio of
HBT radii R_{out}/R_{side} approaches and eventually matches the experimental
data.


title:
Large-amplitude Qn-Qp collectivity in the neutron-rich oxygen isotope
  20O

abstract:
  By means of HFB calculations with independent constraints on axial neutron
and proton quadrupole moments Q_n and Q_p, we investigate the large amplitude
isoscalar and isovector deformation properties of the neutron-rich isotope 20O.
Using the particle-number and angular-momentum projected Generator Coordinate
Method, we analyze the collective dynamics in the {Q_n, Q_p} plane. The
parameterization SLy4 of the Skyrme interaction is used for all calculations in
connection with a density-dependent zero-range pairing interaction. Our results
show that already for this moderately neutron-rich nucleus the transition
moments are modified when independent neutron and proton collective dynamics
are allowed.


title:
Electromagnetic reactions of few-body systems with the Lorentz integral
  transform method

abstract:
  Various electromagnetic few-body break-up reactions into the many-body
continuum are calculated microscopically with the Lorentz integral transform
(LIT) method. For three- and four-body nuclei the nuclear Hamiltonian includes
two- and three- nucleon forces, while semirealistic interactions are used in
case of six- and seven-body systems. Comparisons with experimental data are
discussed. In addition various interesting aspects of the $^4$He
photodisintegration are studied: investigation of a tetrahedrical symmetry of
$^4$He and a test of non-local nuclear force models via the induced two-body
currents.


title:
Chiral SU(3) dynamics, KN interactions and the quest for
  antikaon-nuclear clusters

abstract:
  This presentation reviews recent developments in the understanding of
low-energy kaon-nucleon interactions as they relate to the possible existence
of antikaon-nuclear quasibound states. A state-of-the-art discussion of
low-energy \bar{K}N interactions is given, with special emphasis on the
subthreshold region relevant to the proposed kaon-nuclear systems.


title: Modern shell-model diagonalizations with realistic NN forces

abstract:
  The spectral and statistical properties of nuclei $^{46}$V and $^{48}$Cr are
studied in the framework of nuclear shell model. A microscopical effective
Hamiltonian derived from the CD-Bonn \textit{NN} potential is employed. The
calculations are preliminary results of a newly developed parallel shell-model
code. Calculations with the realistic \textit{NN} interaction reproduce well
the ground-state rotational band and backbending phenomenon in $^{48}$Cr. A
sudden alignment of all particles is seen above the backbend. The
nearest-neighbour spacing distribution in $^{46}$V is presented and compared
with the predictions of random-matrix theory. Significant deviation from the
single Gaussian-orthogonal-ensemble distribution is obtained, indicating that
the isospin-symmetry breaking is not so strong in the nucleus.


title: Systematics of the first 2+ excitation with the Gogny interaction

abstract:
  We examine the global performance of an extended self-consistent mean field
theory of 2+ excitations in even-even nuclei. 518 nuclei are included in our
survey, comprising all but 39 of the known nuclei tabulated by Raman et al. The
theory is based on a quantal collective Hamiltonian in five dimensions in which
the potential energy and the tensor of inertia are obtained from constrained
triaxial Hartree-Fock-Bogoliubov calculations. The only parameters in theory
are those of the finite-range, density-dependent Gogny D1S interaction. The
following properties of the lowest 2+ excitations are calculated: excitation
energy, reduced transition probability, and spectroscopic quadrupole moment. We
find that the theory is very reliable to classify the nuclei by shape.
Quantitatively the performance of the theory in deformed nuclei is excellent:
average excitation energies and transition quadrupole moments are within 5% of
the experimental values, and the dispersion about the averages are 20% and 10%,
respectively. The performance is not as good on spherical and soft nuclei.
Including all nuclei in the performance evaluation, the average transition
quadrupole moment is 10% too high and the dispersion about the mean is 20%. For
the energies, the average is 13% too high and the dispersion is 40%.


title:
Structure of A=10-13 nuclei with two- plus three-nucleon interactions
  from chiral effective field theory

abstract:
  Properties of finite nuclei are evaluated with two-nucleon (NN) and
three-nucleon (NNN) interactions derived within chiral effective field theory
(EFT). The nuclear Hamiltonian is fixed by properties of the A=2 system, except
for two low-energy constants (LECs) that parameterize the short range NNN
interaction. We constrain those two LECs by a fit to the A=3 system binding
energy and investigate sensitivity of 4He, 6Li, 10,11B and 12,13C properties to
the variation of the constrained LECs. We identify a preferred choice that
gives globally the best description. We demonstrate that the NNN interaction
terms significantly improve the binding energies and spectra of mid-p-shell
nuclei not just with the preferred choice of the LECs but even within a wide
range of the constrained LECs. At the same time, we find that a very high
quality description of these nuclei requires further improvements to the chiral
Hamiltonian.


title: Nuclear Scissors Mode with Pairing

abstract:
  The coupled dynamics of the scissors mode and the isovector giant quadrupole
resonance are studied using a generalized Wigner function moments method taking
into account pair correlations. Equations of motion for angular momentum,
quadrupole moment and other relevant collective variables are derived on the
basis of the time dependent Hartree-Fock-Bogoliubov equations. Analytical
expressions for energy centroids and transitions probabilities are found for
the harmonic oscillator model with the quadrupole-quadrupole residual
interaction and monopole pairing force. Deformation dependences of energies and
$B(M1)$ values are correctly reproduced. The inclusion of pair correlations
leads to a drastic improvement in the description of qualitative and
quantitative characteristics of the scissors mode.


title: Resonances in three-body systems with short and long-range interactions

abstract:
  The complex scaling method permits calculations of few-body resonances with
the correct asymptotic behaviour using a simple box boundary condition at a
sufficiently large distance. This is also valid for systems involving more than
one charged particle. We first apply the method on two-body systems. Three-body
systems are then investigated by use of the (complex scaled) hyperspheric
adiabatic expansion method. The case of the 2$^+$ resonance in $^6$Be and
$^6$Li is considered. Radial wave functions are obtained showing the correct
asymptotic behaviour at intermediate values of the hyperradii, where wave
functions can be computed fully numerically.


title: Spectral convexity for attractive SU(2N) fermions

abstract:
  We prove a general theorem on spectral convexity with respect to particle
number for 2N degenerate components of fermions. The number of spatial
dimensions is arbitrary, and the system may be uniform or constrained by an
external potential. We assume only that the interactions are governed by an
SU(2N)-invariant two-body potential whose Fourier transform is negative
definite. The convexity result implies that the ground state is in a
2N-particle clustering phase. We discuss implications for light nuclei as well
as asymmetric nuclear matter in neutron stars.


title: Short-range Three-Nucleon Forces Effects on Nucleon-Deuteron Scattering

abstract:
  Effects of three-nucleon forces arising from the exchange of a pion and a
scalar-isoscalar object among three nucleons on nucleon-deuteron scattering
observables are studied.


title: J/psi hadron interaction in vacuum and in QGP

abstract:
  Motivated by the recent lattice data that $J/\psi$ will survive up to
1.6$T_c$, we calculate the thermal width of $J/\psi$ at finite temperature in
perturbative QCD. The inputs of the calculation are the parton quarkonium
dissociation cross sections at the NLO in QCD, which were previously obtained
by Song and Lee, and a gaussian charmonium wave function, whose size were
fitted to an estimate by Wong by solving the schrodinger equation for
charmonium in a potential extracted from the lattice at finite temperature. We
find that the total thermal width above 1.4$T_c$ becomes larger than 100 to 200
MeV, depending on the effective thermal masses of the quark and gluon, which we
take it to vary from 600 to 400 MeV.


title: Operation of Faddeev-Kernel in Configuration Space

abstract:
  We present a practical method to solve Faddeev three-body equations at
energies above three-body breakup threshold as integral equations in coordinate
space. This is an extension of previously used method for bound states and
scattering states below three-body breakup threshold energy. We show that
breakup components in three-body reactions produce long-range effects on
Faddeev integral kernels in coordinate space, and propose numerical procedures
to treat these effects. Using these techniques, we solve Faddeev equations for
neutron-deuteron scattering to compare with benchmark solutions.


title: Dihadron Tomography of High-Energy Nuclear Collisions in NLO pQCD

abstract:
  Back-to-back dihadron spectra in high-energy heavy-ion collisions are studied
within the next-to-leading order (NLO) perturbative QCD parton model with jet
quenching incorporated via modified jet fragmentation functions due to
radiative parton energy loss in dense medium. The experimentally observed
appearance of back-to-back dihadrons at high $p_T$ is found to originate mainly
from jet pairs produced close and tangential to the surface of the dense
matter. However, a substantial fraction of observed high $p_T$ dihadrons also
comes from jets produced at the center of the medium after losing finite amount
of energy. Consequently, the suppression factor of such high-$p_T$ hadron pairs
is found to be more sensitive to the initial gluon density than the single
hadron spectra that are dominated by surface emission. A simultaneous
$\chi^2$-fit to both the single and dihadron spectra can be achieved within a
narrow range of the energy loss parameters $\epsilon_0=1.6-2.1$ GeV/fm. Because
of the flattening of the initial jet production spectra, high $p_T$ dihadrons
at the LHC energy are found to be more robust as probes of the dense medium.


title:
Relativistic RPA plus phonon-coupling analysis of pygmy dipole
  resonances

abstract:
  The relativistic random-phase approximation (RRPA) plus phonon-coupling (PC)
model is applied in the analysis of E1 strength distributions in $^{208}$Pb and
$^{132}$Sn, for which data on pygmy dipole resonances (PDR) have recently been
reported. The covariant response theory is fully consistent: the effective
nuclear interaction NL3 is used both to determine the spectrum of
single-nucleon Dirac states, and as the residual interaction which determines
the collective phonon states in the relativistic RPA. It is shown that the
picture of the PDR as a resonant oscillation of the neutron skin against the
isospin saturated proton-neutron core, and with the corresponding RRPA state
characterized by a coherent superposition of many neutron particle-hole
configurations, remains essentially unchanged when particle-vibration coupling
is included. The effect of two-phonon admixtures is a weak fragmentation and a
small shift of PDR states to lower excitation energy. Even though the PDR
calculated in the extended model space of $ph \otimes$phonon configurations
contains sizeable two-phonon admixtures, it basically retains a one-phonon
character and its dynamics is not modified by the coupling to low-lying surface
vibrations.


title: Shell Structure of Exotic Nuclei

abstract:
  Theoretical predictions and experimental discoveries for neutron-rich,
short-lived nuclei far from stability indicate that the familiar concept of
nucleonic shell structure should be considered as less robust than previously
thought. The notion of single-particle motion in exotic nuclei is reviewed with
a particular focus on three aspects: (i) variations of nuclear mean field with
neutron excess due to tensor interactions; (ii) importance of many-body
correlations; and (iii) influence of open channels on properties of weakly
bound and unbound nuclear states.


title: Temperature-dependent errors in nuclear lattice simulations

abstract:
  We study the temperature dependence of discretization errors in nuclear
lattice simulations. We find that for systems with strong attractive
interactions the predominant error arises from the breaking of Galilean
invariance. We propose a local "well-tempered" lattice action which eliminates
much of this error. The well-tempered action can be readily implemented in
lattice simulations for nuclear systems as well as cold atomic Fermi systems.


title: Weak decay of hypernuclei - Theoretical status

abstract:
  The physics of the weak decay of hypernuclei is briefly reviewed from a
theoretical point of view. Special regard is devoted to the recent progress
concerning the determination of the non--mesonic decay widths and the asymmetry
parameters. While convincing evidence has been achieved for a solution of the
long-standing puzzle on the ratio Gamma_n/Gamma_p, the discrepancies between
theory and experiment on the decay asymmetries clearly highlight the exigence
of dedicating further efforts in exploring new aspects of the dynamics
underlying the non-mesonic weak decay.


title:
Study of light kaonic nuclei with a Chiral SU(3) - based KbarN
  interaction

abstract:
  We have investigated the prototype kaonic nucleus, $ppK^-$, using the method
of Antisymmetrized Molecular Dynamics (AMD). In the present study we use a
realistic $NN$ potential with strongly repulsive core, and a Chiral SU(3)-based
$\bar{K}N$ interaction which is energy-dependent and includes both $s$- and
p-wave interactions. We find that no self-consistent solutions exist when the
range parameter of the $\bar{K}N$ interaction is less than 0.67 fm. Due to the
strong repulsion of the $NN$ interaction at short distance, the two nucleons in
$ppK^-$ keep a distance of about 1.2 fm and the total binding energy of $ppK^-$
does not exceed about 50 MeV in the scope of our current analysis.


title: Hadron Correlation in Jets

abstract:
  We review some recent experimental and theoretical work on the correlation
among hadrons produced at intermediate $p_T$ at RHIC. The topics include:
forward and backward asymmetry with and without trigger at mid-rapidity,
associated-particle distribution on the near side, the $\Omega$ puzzle and its
solution, associated particles on the away side, and two-jet recombination at
LHC.


title: Short-range correlations and neutrinoless double beta decay

abstract:
  In this work we report on the effects of short-range correlations upon the
matrix elements of neutrinoless double beta decay. We focus on the calculation
of the matrix elements of the neutrino-mass mode of neutrinoless double beta
decays of 48Ca and 76Ge. The nuclear-structure components of the calculation,
that is the participant nuclear wave functions, have been calculated in the
shell-model scheme for 48Ca and in the proton-neutron quasiparticle
random-phase approximation (pnQRPA) scheme for 76Ge. We compare the traditional
approach of using the Jastrow correlation function with the more complete
scheme of the unitary correlation operator method (UCOM). Our results indicate
that the Jastrow method vastly exaggerates the effects of short-range
correlations on the neutrinoless double beta decay nuclear matrix elements.


title:
Correlation and Fluctuation in Multiparticle Production: Some Closing
  Remarks

abstract:
  Some general comments are made on the evolution of this series of workshops
and on some features of this particular Workshop without attempting to
summarize all the talks presented.


title: Center-of-mass effects in electromagnetic two-proton knockout reactions

abstract:
  The role of center-of mass (CM) effects in the one-body nuclear current in
the description of electromagnetically induced two-nucleon knockout reactions
is discussed in connection with the problem of the lack of orthogonality
between initial bound states and final scattering states obtained by the use of
an energy-dependent optical model potential. Results for the cross sections of
the exclusive $^{16}$O(e,e$'$pp)$^{14}$C and $^{16}$O($\gamma$,pp)$^{14}$C
knockout reactions in different kinematics are presented and discussed. In
super-parallel kinematics CM effects produce a strong enhancement of the
$^{16}$O(e,e$'$pp)$^{14}$C$_{\rm g.s.}$ cross section which strongly reduces
the destructive interference between the one-body and $\Delta$-current and the
sensitivity to the treatment of the $\Delta$-current found in previous work.


title:
Special Solutions of the Bohr Hamiltonian Related to Shape Phase
  Transitions in Nuclei

abstract:
  Nuclei exhibit quantum phase transitions (earlier called ground state phase
transitions) between different shapes as the number of nucleons is modified,
resulting in changes in the ground and low lying nuclear states. Special
solutions of the Bohr Hamiltonian appropriate for the critical point of such
shape phase transitions, as well as other special solutions applicable to
relevant nuclear regions are described.


title:
The effect of the spectator charge on the charged pion spectra in
  peripheral ultrarelativistic heavy-ion collisions

abstract:
  We estimate the electromagnetic effect of the spectator charge on the
momentum spectra of charged pions produced in peripheral Pb+Pb collisions at
SPS energies. We find a large effect which results in strongly varying
structures in the $x_F$ dependence of the $\pi^+/\pi^-$ ratio, especially at
low transverse momenta where a deep valley in the above ratio is predicted at
$x_F \sim$ 0.15 -- 0.20. The effect depends on initial conditions. Thus, it
provides new information on the space and time evolution of the
non-perturbative pion creation process.


title:
Electromagnetic KY production from the proton in a Regge-plus-resonance
  approach

abstract:
  A Regge-plus-resonance (RPR) description of the p(\gamma,K)Y and p(e,e'K)Y
processes (Y = \Lambda, \Sigma^{0,+}) is presented. The proposed reaction
amplitude consists of Regge-trajectory exchanges in the t channel, supplemented
with a limited selection of s-channel resonance diagrams. The RPR framework
contains a considerably smaller number of free parameters than a typical
effective-Lagrangian model. Nevertheless, it provides an acceptable overall
description of the photo- and electroproduction observables over an extensive
photon energy range. It is shown that the electroproduction response functions
and polarization observables are particularly useful for fine-tuning both the
background and resonance parameters.


title: What to Expect When You're Expecting: Femtoscopy at the LHC

abstract:
  A huge systematics of femtoscopic measurements have been used over the past
20 years to characterize the system created in heavy ion collisions. These
measurements cover two orders of magnitude in energy, and with LHC beams
imminent, this range will be extended by more than another order of magnitude.
Here, I discuss theoretical expectations of femtoscopy of $A+A$ and $p+p$
collisions at the LHC, based on Boltzmann and hydrodynamic calculations, as
well as on naive extrapolation of existing systematics.


title: Fluid Dynamics as Diagnostic Tool for Heavy Ion Collisions

abstract:
  Ultra-Relativistic Heavy Ion Collisions at an energy $\sqrt{s_{NN}} = 65 {\rm
GeV}$ are studied in a three-dimensional Fluid Dynamical model. The results of
a hydrodynamical evolution using the PIC-method are shown. The importance and
diagnostic value of a proper reaction plane determination is emphasized, and
the time development of collective measurables is presented.


title: On the momentum-dependence of $K^{-}$-nuclear potentials

abstract:
  The momentum dependent $K^{-}$-nucleus optical potentials are obtained based
on the relativistic mean-field theory. By considering the quarks coordinates of
$K^-$ meson, we introduced a momentum-dependent "form factor" to modify the
coupling vertexes. The parameters in the form factors are determined by fitting
the experimental $K^{-}$-nucleus scattering data. It is found that the real
part of the optical potentials decrease with increasing $K^-$ momenta, however
the imaginary potentials increase at first with increasing momenta up to
$P_k=450\sim 550$ MeV and then decrease. By comparing the calculated $K^-$ mean
free paths with those from $K^-n$/$K^-p$ scattering data, we suggested that the
real potential depth is $V_0\sim 80$ MeV, and the imaginary potential parameter
is $W_0\sim 65$ MeV.


title: Long-range behaviour in hyperspherical formalism

abstract:
  It is shown that hyperspherical harmonics can be represented in a form
typical of traditional microscopic cluster models. This allows those
hyperharmonics that are responsible for long-range behaviour of valence
nucleons in loosely-bound nuclei to be selected. The hyperspherical cluster
model based on such hyperharmonics is tested for $^5$He using a simplified
description of the $^4$He core and two versions of the Volkov potential which
give $^5$He as either bound or unbound. The study has confirmed that it is
possible to get a converged solution for binding energy, r.m.s. radius, overlap
integral and asymptotic normalization coefficient with small number of basis
functions for bound $^5$He. The values obtained of these quantities are very
close to those calculated in a microscopic cluster model.


title: Looking for bimodal distributions in multi-fragmentation reactions

abstract:
  The presence of a phase transition in a finite system can be deduced,
together with its order, from the shape of the distribution of the order
parameter. This issue has been extensively studied in multifragmentation
experiments, with results that do not appear fully consistent. In this paper we
discuss the effect of the statistical ensemble or sorting conditions on the
shape of fragment distributions, and propose a new method, which can be easily
implemented experimentally, to discriminate between different fragmentation
scenarii. This method, based on a reweighting of the measured distribution to
account for the experimental constraints linked to the energy deposit, is
tested on different simple models, and appears to provide a powerful
discrimination.


title:
Heavy quark jet quenching with collisional plus radiative energy loss
  and path length fluctuations

abstract:
  With the QGP opacity computed perturbatively and with the global entropy
constraints imposed by the observed $dN_{ch}/dy\approx1000$, radiative energy
loss alone cannot account for the observed suppression of single non-photonic
electrons. We show that collisional energy loss, which previously has been
neglected, is comparable to radiative loss for both light and heavy jets and
may in fact be the dominant mechanism for bottom quarks. Predictions taking
into account both radiative and collisional losses significantly reduce the
discrepancy with data. In addition to elastic energy loss, it is critical to
include jet path length fluctuations to account for the observed pion
suppression.


title: Time Dependent Hadronization via HERMES and EMC Data Consistency

abstract:
  Using QCD-inspired time dependent cross sections for pre-hadrons we provide a
combined analysis of available experimental data on hadron attenuation in DIS
off nuclei as measured by HERMES with 12 and 27 GeV and by EMC with 100 and 280
GeV lepton beam energies. We extract the complete four-dimensional evolution of
the pre-hadrons using the JETSET-part of PYTHIA. We find a remarkable
sensitivity of nuclear attenuation data to the details of the time-evolution of
cross sections. Only cross sections evolving linearly in time describe the
available data in a wide kinematical regime. Predictions for experimental
conditions at JLAB (5 and 12 GeV beam energies) are included.


title: Low Momentum Nucleon-Nucleon Interactions and Shell-Model Calculations

abstract:
  In the last few years, the low-momentum nucleon-nucleon (NN) interaction
V-low-k derived from free-space NN potentials has been successfully used in
shell-model calculations. V-low-k is a smooth potential which preserves the
deuteron binding energy as well as the half-on-shell T-matrix of the original
NN potential up to a momentum cutoff Lambda. In this paper we put to the test a
new low-momentum NN potential derived from chiral perturbation theory at
next-to-next-to-next-to-leading order with a sharp low-momentum cutoff at 2.1
fm-1. Shell-model calculations for the oxygen isotopes using effective
hamiltonians derived from both types of low-momentum potential are performed.
We find that the two potentials show the same perturbative behavior and yield
very similar results.


title:
Analysis of (pi^{+-},K^+) and (K^-,K^+) hypernuclear production spectra
  in distorted wave impulse approximation

abstract:
  We study the hyperon-nucleus potential with distorted wave impulse wave
approximation (DWIA) using Green's function method. In order to include the
nucleon and hyperon potential effects in Fermi averaging, we introduce the
local optimal momentum approximation of target nucleons. We can describe the
quasi free Lambda, Sigma and Xi production spectra in a better way than in the
standard Fermi averaged t-matrix treatments.


title: Bulk viscosity due to kaons in color-flavor-locked quark matter

abstract:
  We calculate the bulk viscosity of color-superconducting quark matter in the
color-flavor-locked (CFL) phase. We assume that the lightest bosons are the
superfluid mode H and the kaons K0 and K+, and that there is no kaon
condensate. We calculate the rate of strangeness-equilibrating processes that
convert kaons into superfluid modes, and the resultant bulk viscosity. We find
that for oscillations with a timescale of milliseconds, at temperatures T << 1
MeV, the CFL bulk viscosity is much less than that of unpaired quark matter,
but at higher temperatures the bulk viscosity of CFL matter can become larger.


title:
Are spectroscopic factors from transfer reactions consistent with
  asymptotic normalisation coefficients?

abstract:
  It is extremely important to devise a reliable method to extract
spectroscopic factors from transfer cross sections. We analyse the standard
DWBA procedure and combine it with the asymptotic normalisation coefficient,
extracted from an independent data set. We find that the single particle
parameters used in the past generate inconsistent asymptotic normalization
coefficients. In order to obtain a consistent spectroscopic factor,
non-standard parameters for the single particle overlap functions can be used
but, as a consequence, often reduced spectroscopic strengths emerge. Different
choices of optical potentials and higher order effects in the reaction model
are also studied. Our test cases consist of: $^{14}$C(d,p)$^{15}$C(g.s.) at
$E_d^{lab}=14$ MeV, $^{16}$O(d,p)$^{17}$O(g.s.) at $E_d^{lab}=15$ MeV and
$^{40}$Ca(d,p)$^{41}$Ca(g.s.) at $E_d^{lab}=11$ MeV. We underline the
importance of performing experiments specifically designed to extract ANCs for
these systems.


title:
Variational Calculation for the Equation of State of Nuclear Matter at
  Finite Temperatures

abstract:
  An equation of state (EOS) for uniform nuclear matter is constructed at zero
and finite temperatures with the variational method starting from the realistic
nuclear Hamiltonian composed of the Argonne V18 and UIX potentials. The energy
is evaluated in the two-body cluster approximation with the three-body-force
contribution treated phenomenologically so as to reproduce the empirical
saturation conditions. The obtained energies for symmetric nuclear matter and
neutron matter at zero temperature are in fair agreement with those by Akmal,
Pandharipande and Ravenhall, and the maximum mass of the neutron star is 2.2
Msolar. At finite temperatures, a variational method by Schmidt and
Pandharipande is employed to evaluate the free energy, which is used to derive
various thermodynamic quantities of nuclear matter necessary for supernova
simulations. The result of this variational method at finite temperatures is
found to be self-consistent.


title: Radiative decay of the Delta(1700)

abstract:
  Electromagnetic properties provide information about the structure of
strongly interacting systems and allow for independent tests of hadronic
models. The radiative decay of the Delta(1700) is studied, which appears
dynamically generated in a coupled channel approach from the rescattering of
the (3/2^+) decuplet of baryons with the (0^-) octet of pseudoscalar mesons.
The radiative decay is predicted from the well-known couplings of the photon to
the mesons and hadrons which constitute this resonance in the dynamical
picture.


title:
The Unitary Clothing Transformation Method in Quantum Field Theory.
  Renormalization of Coupling Constant

abstract:
  Applying the unitary clothing transformation method in the model of charged
spinless nucleons and neutral mesons interacting via the three-linear
Yukawa-type coupling, the expression for the charge shift in the third order in
the coupling constant is derived. Being determined off the energy shell, the
ex-pression can be reduced on the energy shell to the explicitly covariant
form, providing the independence of the particle momenta. Comparison with the
cor-responding result of the Dyson covariant perturbation theory is performed
by es-tablishing the link between the old-fashioned perturbation theory and the
cloth-ing approach.


title: Density reorganization in hot nuclei

abstract:
  The density profile of a hot nuclear system produced in intermediate energy
heavy ion collisions is studied in a microcanonical formulation with a momentum
and density dependent finite range interaction. The caloric curve and the
density evolution with excitation are calculated for a number of systems for
the equilibrium mononuclear configuration; they compare favorably with the
recent experimental data. The studied density fluctuations are seen to build up
rapidly beyond an excitation energy of 8 MeV/u indicating the instability of
the system towards nuclear disassembly. Explicit introduction of deformation in
the expansion path of the heated nucleus, however, shows that the system might
fragment even earlier. We also explore the effects of the nuclear equation of
state and of the mass and isospin asymmetry on the nuclear equilibrium
configuration and the relevant experimental observables.


title:
The relation between nuclear charge radii and other parameters
  characterizing the nuclear drops

abstract:
  Correlation between the rms nucleus charge radius and their deformation,
isospin asymmetry, mass and charge numbers are presented. Four parameters
radius parametrization formula is proposed. Ratio of experimental to
theoretical value distribution exhibit variation equal to 0.0044, i.e. it
corresponds to the vaule of experimental errors. Observed correlations can
impose interesting constraints on the form of the nuclear equation of state.


title: Nonequilibrium dynamics of quantum fields

abstract:
  The nonequilibrium effective equation of motion for a scalar background field
in a thermal bath is studied numerically. This equation emerges from a
microscopic quantum field theory derivation and it is suitable to a Langevin
simulation on the lattice. Results for both the symmetric and broken phases are
presented.


title:
Elliptic Flow from a Hybrid CGC, Full 3D Hydro and Hadronic Cascade
  Model

abstract:
  We investigate the robustness of the discovery of the perfect fluid through
comparison of hydrodynamic calculations with the elliptic flow coefficient v_2
at midrapidity in Au+Au collisions at sqrt{s_{NN}}=200 GeV. Employing the
Glauber model for initial entropy density distributions, the centrality
dependence of v_2 is reasonably reproduced by using an ideal fluid description
of the early QGP stage followed by a hadronic cascade in the late hadronic
stage. On the other hand, initial conditions based on the Colour Glass
Condensate model are found to generate larger elliptic flow due to larger
initial eccentricity epsilon. We further predict v_2/epsilon at a fixed impact
parameter as a function of collision energy sqrt{s_{NN}} up to the LHC energy.


title:
Shell-model calculations of two-neutrino double-beta decay rates of
  $^{48}$Ca with GXPF1A interaction

abstract:
  The two-neutrino double beta decay matrix elements and half-lives of
$^{48}$Ca, are calculated within a shell-model approach for transitions to the
ground state and to the $2^+$ first excited state of $^{48}$Ti. We use the full
$pf$ model space and the GXPF1A interaction, which was recently proposed to
describe the spectroscopic properties of the nuclei in the nuclear mass region
A=47-66. Our results are $T_{1/2}(0^{+}\to 0^{+})$ = $3.3\times 10^{19}$ $yr$
and $T_{1/2}(0^{+}\to 2^{+})$ = $8.5\times 10^{23}$ $yr$. The result for the
decay to the $^{48}$Ti 0$^+$ ground state is in good agreement with experiment.
The half-life for the decay to the 2$^+$ state is two orders of magnitude
larger than obtained previously.


title:
The Theory of Nuclear Forces: Is the Never-Ending Story Coming to an
  End?

abstract:
  I review the recent progress in our understanding of nuclear forces in terms
of an effective field theory (EFT) for low-energy QCD and put this progress
into historical perspective. This is followed by an assessment of the current
status of EFT based nuclear potentials. In concluding, I will summarize some
unresolved issues.


title:
Investigating Neutron Polarizabilities through Compton Scattering on
  $^3$He

abstract:
  We examine manifestations of neutron electromagnetic polarizabilities in
coherent Compton scattering from the Helium-3 nucleus. We calculate $\gamma
^3$He elastic scattering observables using chiral perturbation theory to
next-to-leading order (${\mathcal O}(e^2 Q)$). We find that the unpolarized
differential cross section can be used to measure neutron electric and magnetic
polarizabilities, while two double-polarization observables are sensitive to
different linear combinations of the four neutron spin polarizabilities.
  [Note added in 2018] An erratum for this paper has been posted as
arXiv:1804.01206. Overall conclusions are unchanged, but quantitative results
are affected appreciably.


title:
Evidence for charmonium generation at the phase boundary in
  ultra-relativistic nuclear collisions

abstract:
  We investigate the transition from suppression to enhancement of J/psi mesons
produced in ultra-relativistic nuclear collisions in the framework of the
statistical hadronization model. The calculations are confronted with the most
recent data from the RHIC accelerator. This comparison yields first direct
evidence for generation of J/psi mesons at the phase boundary. Based on the
success of this approach we make specific predictions for LHC energy.


title:
Transition from Baryon- to Meson-Dominated Freeze Out -- Early
  Decoupling around 30 A GeV?

abstract:
  The recently discovered sharp peak in the excitation function of the K+/pi+
ratio around 30 A GeV in relativistic heavy-ion collisions is discussed in the
framework of the Statistical Model. In this model, the freeze-out of an ideal
hadron gas changes from a situation where baryons dominate to one with mainly
mesons. This transition occurs at a temperature T = 140 MeV and baryon chemical
potential mu(B) = 410 MeV corresponding to an energy of sqrt(s) = 8.2 GeV. The
calculated maximum in the K+/pi+ ratio is, however, much less pronounced than
the one observed by the NA49 Collaboration. The smooth increase of the K-/pi-
ratio with incident energy and the shape of the excitation functions of the
Lambda/pi+, Xi-/pi+ and Omega/pi ratios all exhibiting maxima at different
incident energies, is consistent with the presently available experimental
data. The measured K+/pi+ ratio exceeds the calculated one just at the incident
energy when the freeze-out condition is changing.
  We speculate that at this point freeze-out might occur in a modified way. We
discuss a scenario of an early freeze-out which indeed increases K+/pi+ ratio
while most other particle ratios remain essentially unchanged. Such an early
freeze-out is supported by results from HBT studies.


title: Exotic modes of excitation in atomic nuclei far from stability

abstract:
  We review recent studies of the evolution of collective excitations in atomic
nuclei far from the valley of $\beta$-stability. Collective degrees of freedom
govern essential aspects of nuclear structure, and for several decades the
study of collective modes such as rotations and vibrations has played a vital
role in our understanding of complex properties of nuclei. The multipole
response of unstable nuclei and the possible occurrence of new exotic modes of
excitation in weakly-bound nuclear systems, present a rapidly growing field of
research, but only few experimental studies of these phenomena have been
reported so far. Valuable data on the evolution of the low-energy dipole
response in unstable neutron-rich nuclei have been gathered in recent
experiments, but the available information is not sufficient to determine the
nature of observed excitations. Even in stable nuclei various modes of giant
collective oscillations had been predicted by theory years before they were
observed, and for that reason it is very important to perform detailed
theoretical studies of the evolution of collective modes of excitation in
nuclei far from stability. We therefore discuss the modern theoretical tools
that have been developed in recent years for the description of collective
excitations in weakly-bound nuclei. The review focuses on the applications of
these models to studies of the evolution of low-energy dipole modes from stable
nuclei to systems near the particle emission threshold, to analyses of various
isoscalar modes, those for which data are already available, as well as those
that could be observed in future experiments, to a description of
charge-exchange modes and their evolution in neutron-rich nuclei, and to
studies of the role of exotic low-energy modes in astrophysical processes.


title: Theory and Phenomenology of Vector Mesons in Medium

abstract:
  Electromagnetic probes promise to be direct messengers of (spectral
properties of) hot and dense matter formed in heavy-ion collisions, even at
soft momentum transfers essential for characterizing possible phase
transitions. We examine how far we have progressed toward this goal by
highlighting recent developments, and trying to establish connections between
lattice QCD, effective hadronic models and phenomenology of dilepton
production.


title:
Terminating states as a unique laboratory for testing nuclear energy
  density functional

abstract:
  Systematic calculations of favored signature maximum-spin I_max and unfavored
signature I_max - 1 terminating states for [f 7/2 ^ n] and [d 3/2 ^ (-1) f 7/2
^ (n+1)] configurations (n denotes number of valence particles) in A ~ 44 mass
region are presented. Following the result of Zdunczuk et al., Phys. Rev. C71
(2005) 024305 the calculations are performed using Skyrme energy density
functional with empirical Landau parameters and slightly reduced spin-orbit
strength. The aim is to identify and phenomenologically restore rotational
symmetry broken by the Skyrme-Hartree-Fock solutions. In particular, it is
shown that correlation energy due to symmetry restoration is absolutely crucial
in order to reproduce energy splitting E(I_max) - E(I_max -1) in [f 7/2 ^ n]
configurations but is relatively less important for [d 3/2 ^ (-1) f 7/2 ^
(n+1)] configurations.


title:
Deciphering the properties of hot and dense matter with hadron-hadron
  correlations

abstract:
  Two classes of jet correlations in hot and dense matter are explored.
Correlations between very high transverse momentum hadrons within a jet sample
the gluon density of the medium, where, the minimal modification on the same
side as the trigger is consistent with the picture and parameters of partonic
energy loss. Lower momentum partons, sampled through softer correlations, due
to their larger wavelengths are sensitive to the presence of composite
structures in the medium. Scattering off such states may modify the dispersion
relation of the radiated gluons resulting in conical patterns in the detected
correlations.


title: In-medium properties of kaons in a chiral approach

abstract:
  The first order self-energy corrections of the kaon in the symmetric nuclear
matter are calculated from kaon-nucleon scattering matrix elements using a
chiral Lagrangian within the framework of relativistic mean field
approximation. It shows that the effective mass and the potential of K^+ meson
are identical with those of K^- meson in the nuclear matter, respectively. The
effective mass of the kaon in the nuclear matter decreases with the nuclear
density increasing, and is not relevant to the kaon-nucleon Sigma term. The
kaon-nucleus potential is positive and increases with the nuclear density.
Moreover, the influence of the resonance $\Lambda(1405)$ on the $K^-$-nucleus
potential due to the re-scattering term is discussed. Our results indicate the
K^- meson could not be bound in the nuclei even if the contribution of
$\Lambda(1405)$ resonance is considered.


title:
Generic strong coupling behavior of Cooper pairs in the surface of
  superfluid nuclei

abstract:
  With realistic HFB calculations, using the D1S Gogny force, we reveal a
generic behavior of concentration of small sized Cooper pairs (2-3 fm) in the
surface of superfluid nuclei. This study confirms and extends previous results
given in the literature that use more schematic approaches.


title: Charmonium-Nucleon Dissociation Cross Sections in the Quark Model

abstract:
  Charmonium dissociation cross sections due to flavor-exchange
charmonium-baryon scattering are computed in the constituent quark model. We
present results for inelastic $J/\psi N$ and $\eta_c N$ scattering amplitudes
and cross sections into 46 final channels, including final states composed of
various combinations of $D$, $D^*$, $\Sigma_c$, and $\Lambda_c$. These results
are relevant to experimental searches for the deconfined phase of quark matter,
and may be useful in identifying the contribution of initial $c\bar c$
production to the open-charm final states observed at RHIC through the
characteristic flavor ratios of certain channels. These results are also of
interest to possible charmonium-nucleon bound states.


title:
Improving a radiative plus collisional energy loss model for application
  to RHIC and LHC

abstract:
  With the QGP opacity computed perturbatively and with the global entropy
constraints imposed by the observed dNch/dy~1000, radiative energy loss alone
cannot account for the observed suppression of single non-photonic electrons.
Collisional energy loss is comparable in magnitude to radiative loss for both
light and heavy jets. Two aspects that significantly affect the collisional
energy loss are examined: the role of fluctuations, and the effect of
introducing a running QCD coupling as opposed to the fixed alpha_s=0.3 used
previously.


title: Neutrino Properties, Cosmology

abstract:
  Review of neutrino properties; double beta decay; very high energy neutrinos;
leptogenesis


title: Lambda-N scattering length from the reaction gamma d -> K^+ Lambda n

abstract:
  The perspects of utilizing the strangeness-production reaction gamma d -> K^+
Lambda n for the determination of the Lambda n low-energy scattering parameters
are investigated. The spin observables that need to be measured in order to
isolate the Lambda n singlet (1S0) and triplet (3S1) states are identified.
Possible kinematical regions where the extraction of the Lambda n scattering
lengths might be feasible are discussed.


title: Radiative orbital electron capture by the atomic nucleus

abstract:
  The rate for the photon emission accompanying orbital 1S electron capture by
the atomic nucleus is recalculated. While a photon can be emitted by the
electron or by the nucleus, the use of the length gauge significantly
suppresses the nuclear contribution. Our calculations resolve the long standing
discrepancy of theoretical predictions with experimental data for $\Delta J=2$
forbidden transitions. We illustrate the results by comparison with the data
established experimentally for the first forbidden unique decays of $^{41}$Ca
and $^{204}$Tl.


title: Random Matrices and Chaos in Nuclear Spectra

abstract:
  We speak of chaos in quantum systems if the statistical properties of the
eigenvalue spectrum coincide with predictions of random-matrix theory. Chaos is
a typical feature of atomic nuclei and other self-bound Fermi systems. How can
the existence of chaos be reconciled with the known dynamical features of
spherical nuclei? Such nuclei are described by the shell model (a mean-field
theory) plus a residual interaction. We approach the question by using a
statistical approach (the two-body random ensemble): The matrix elements of the
residual interaction are taken to be random variables. We show that chaos is a
generic feature of the ensemble and display some of its properties, emphasizing
those which differ from standard random-matrix theory. In particular, we
display the existence of correlations among spectra carrying different quantum
numbers. These are subject to experimental verification.


title:
Quarkonium production in ultra-relativistic nuclear collisions:
  suppression vs. enhancement

abstract:
  After a brief review of the various scenarios for quarkonium production in
ultra-relativistic nucleus-nucleus collisions we focus on the ingredients and
assumptions underlying the statistical hadronization model. We then confront
model predictions for J/$\psi$ phase space distributions with the most recent
data from the RHIC accelerator. Analysis of the rapidity dependence of the
J/$\psi$ nuclear modification factor yields first evidence for the production
of J/$\psi$ mesons at the phase boundary. We conclude with predictions for
charmonium production at the LHC.


title: The Pion Cloud of the Nucleon: Facts and popular Fantasies

abstract:
  I discuss the concept of the pion cloud surrounding the nucleon and other
hadrons - and its limitations.


title: Triaxiality and shape coexistence in Germanium isotopes

abstract:
  The ground-state deformations of the Ge isotopes are investigated in the
framework of Gogny-Hartree-Fock-Bogoliubov (HFB) and Skyrme Hartree-Fock plus
pairing in the BCS approximation. Five different Skyrme parametrizations are
used to explore the influence of different effective masses and spin-orbit
models. There is generally good agreement for binding energies and deformations
(total quadrupole moment, triaxiality) with experimental data where available
(i.e., in the valley of stability). All calculations agree in predicting a
strong tendency for triaxial shapes in the Ge isotopes with only a few
exceptions due to neutron (sub-)shell closures. The frequent occurrence of
energetically very close shape isomers indicates that the underlying
deformation energy landscape is very soft. The general triaxial softness of the
Ge isotopes is demonstrated in the fully triaxial potential energy surface. The
differences between the forces play an increasing role with increasing neutron
number. This concerns particularly the influence of the spin-orbit model, which
has a visible effect on the trend of binding energies towards the drip line.
Different effective mass plays an important role in predicting the quadrupole
and triaxial deformations. The pairing strength only weakly affects binding
energies and total quadrupole deformations, but considerably influences
triaxiality.


title: A Global Model of $\beta^-$-Decay Half-Lives Using Neural Networks

abstract:
  Statistical modeling of nuclear data using artificial neural networks (ANNs)
and, more recently, support vector machines (SVMs), is providing novel
approaches to systematics that are complementary to phenomenological and
semi-microscopic theories. We present a global model of $\beta^-$-decay
halflives of the class of nuclei that decay 100% by $\beta^-$ mode in their
ground states. A fully-connected multilayered feed forward network has been
trained using the Levenberg-Marquardt algorithm, Bayesian regularization, and
cross-validation. The halflife estimates generated by the model are discussed
and compared with the available experimental data, with previous results
obtained with neural networks, and with estimates coming from traditional
global nuclear models. Predictions of the new neural-network model are given
for nuclei far from stability, with particular attention to those involved in
r-process nucleosynthesis. This study demonstrates that in the framework of the
$\beta^-$-decay problem considered here, global models based on ANNs can at
least match the predictive performance of the best conventional global models
rooted in nuclear theory. Accordingly, such statistical models can provide a
valuable tool for further mapping of the nuclidic chart.

categories: nucl-th astro-ph cond-mat.dis-nn physics.data-an


title:
Progress in Understanding the Nuclear Equation of State at the Quark
  Level

abstract:
  At the present time there is a lively debate within the nuclear community
concerning the relevance of quark degrees of freedom in understanding nuclear
structure. We outline the key issues and review the impressive progress made
recently within the framework of the quark-meson coupling model. In particular,
we explain in quite general terms how the modification of the internal
structure of hadrons in-medium leads naturally to three- and four-body forces,
or equivalently, to density dependent effective interactions.


title: Charged current neutrino induced coherent pion production

abstract:
  We analyze the neutrino induced charged current coherent pion production at
the energies of interest for recent experiments like K2K and MiniBooNE. Medium
effects in the production mechanism and the distortion of the pion wave
function, obtained solving the Klein Gordon equation with a microscopic optical
potential, are included in the calculation. We find a strong reduction of the
cross section due to these effects and also substantial modifications of the
energy distributions of the final lepton and pion.


title: Sigma-omega meson coupling and properties of nuclei and nuclear matter

abstract:
  We have constructed a Lagrangian model (SIG-OM) with coupling of sigma and
omega mesons in the relativistic mean-field theory. Properties of finite nuclei
and nuclear matter have been explored with the new Lagrangian model. The study
shows that with SIG-OM an excellent description of binding energies and charge
radii of nuclei over a large range of isospin is achieved. With an
incompressibility of nuclear matter K=265 MeV, it is also able to describe the
breathing-mode isoscalar giant monopole resonance energies appropriately. It is
shown that the high-density behaviour of the equation of state of nuclear and
neutron matter with the sigma-omega coupling is significantly softer than the
non-linear scalar coupling model.


title: Examining the chiral geometry in 104Rh and 106Rh

abstract:
  The criteria for chiral doublet bands based on one particle and one hole
coupled to a triaxial rotor have been summarized. Two representative cases in
$A\sim100$ odd-odd nuclei, nearly degenerate $\Delta I =1$ doublet bands in
$^{104}$Rh and $^{106}$Rh are checked against these chiral criteria. It is
shown that $^{106}$Rh possesses better chiral geometry than $^{104}$Rh,
although the energy near degeneracy is achieved in $^{104}$Rh in comparison
with the constant energy separation of doublet bands in $^{106}$Rh.


title:
Doublet bands in $^{126}$Cs in the triaxial rotor model coupled with two
  quasiparticles

abstract:
  The positive parity doublet bands based on the $\pi h_{11/2}\otimes\nu
h_{11/2}$ configuration in $^{126}$Cs have been investigated in the two
quasi-particles coupled with a triaxial rotor model. The energy spectra $E(I)$,
energy staggering parameter $S(I)=[E(I)-E(I-1)]/2I$, $B(M1)$ and $B(E2)$
values, intraband $B(M1)/B(E2)$ ratios,
$B(M1)_{\textrm{in}}/B(M1)_{\textrm{out}}$ ratios, and orientation of the
angular momentum for the rotor as well as the valence proton and neutron are
calculated. After including the pairing correlation, good agreement has been
obtained between the calculated results and the data available, which supports
the interpretation of this positive parity doublet bands as chiral bands.


title: Analysis of Dilepton Invariant Mass Spectrum in C+C at 2 and 1 AGeV

abstract:
  Recently the HADES collaboration has published the invariant mass spectrum of
$e^+e^-$ pairs, dN/dM$_{e^+e^-}$, produced in C+C collisions at 2 AGeV. Using
electromagnetic probes, one hopes to get in this experiment information on
hadron properties at high density and temperature. Simulations show that firm
conclusions on possible in-medium modifications of meson properties will only
be possible when the elementary meson production cross sections, especially in
the pn channel, as well as production cross sections of baryonic resonances are
better known. Presently one can conclude that a) simulations overpredict by far
the cross section at $M_{e^+e^-} \approx M_{\omega}{^0}$ if free production
cross sections are used and that b) the upper limit of the $\eta$ decay into
$e^+e^-$ is smaller than the present upper limit of the Particle Data Group.
This is the result of simulations using the Isospin Quantum Molecular Dynamics
(IQMD) approach.