title: Allowed Gamow-Teller Excitations from the Ground State of 14N

abstract:
  Motivated by the proposed experiment $^{14}N(d,{^2He})^{14}C$, we study the
final states which can be reached via the allowed Gamow-Teller mechanism. Much
emphasis has been given in the past to the fact that the transition matrix
element from the $J^{\pi}=1^+ T=0$ ground state of $^{14}N$ to the $J^{\pi}=0^+
T=1$ ground state of $^{14}C$ is very close to zero, despite the fact that all
the quantum numbers are right for an allowed transition. We discuss this
problem, but, in particular, focus on the excitations to final states with
angular momenta $1^+$ and $2^+$. We note that the summed strength to the
$J^{\pi}=2^+ T=1$ states, calculated with a wide variety of interactions, is
significantly larger than that to the $J^{\pi}=1^+ T=1$ final states.


title:
Density Dependence of Two-Body Interactions for Beyond Mean-Field
  Calculations

abstract:
  This paper deals with the theoretical foundation of effective two-body forces
for the Generator Coordinate Method (GCM) and the projected mean-field method.
The first aim of this paper is to reduce into various local-densities the
in-medium content of a generalized $G$ matrix removing the hard core problem in
this extended context. Then, we consider the possible renormalization of
multi-body forces through a density-dependent two-body interaction in the
context of configuration mixing calculations. A density dependence of the form
$\rho^{\sigma}$, as used in Skyrme and Gogny forces, is successfully
interpreted as doing so when the mixed density is used. Finally, we propose a
simple extension of the Skyrme force dedicated to the calculation of matrix
elements between non-orthogonal product states, which are needed to evaluate
the correlated energy.


title:
The nuclear fusion reaction rate based on relativistic equilibrium
  velocity distribution

abstract:
  The Coulomb barrier is in general much higher than thermal energy. Nuclear
fusion reactions occur only among few protons and nuclei with higher relative
energies than Coulomb barrier. It is the equilibrium velocity distribution of
these high-energy protons and nuclei that participates in determining the rate
of nuclear fusion reactions. In the circumstance it is inappropriate to use the
Maxwellian velocity distribution for calculating the nuclear fusion reaction
rate. We use the relativistic equilibrium velocity distribution for this
purpose. The rate based on the relativistic equilibrium velocity distribution
has a reduction factor with respect to that based on the Maxwellian
distribution, which factor depends on the temperature, reduced mass and atomic
numbers of the studied nuclear fusion reactions. This signifies much to the
solar neutrino problem.


title:
Astrophysical reaction rate for $\alpha(\alpha n,\gamma)$$^{9}$Be by
  photodisintegration

abstract:
  We study the astrophysical reaction rate for the formation of $^{9}$Be
through the three body reaction $\alpha(\alpha n,\gamma)$. This reaction is one
of the key reactions which could bridge the mass gap at A = 8 nuclear systems
to produce intermediate-to-heavy mass elements in alpha- and neutron-rich
environments such as r-process nucleosynthesis in supernova explosions,
s-process nucleosynthesis in asymptotic giant branch (AGB) stars, and
primordial nucleosynthesis in baryon inhomogeneous cosmological models. To
calculate the thermonuclear reaction rate in a wide range of temperatures, we
numerically integrate the thermal average of cross sections assuming a
two-steps formation through a metastable $^{8}$Be. Off-resonant and on-resonant
contributions from the ground state in $^{8}$Be are taken into account. As
input cross section, we adopt the latest experimental data by
photodisintegration of $^{9}$Be with laser-electron photon beams, which covers
all relevant resonances in $^{9}$Be. We provide the reaction rate for
$\alpha(\alpha n,\gamma)^{9}$Be in the temperature range from T$_{9}$=10$^{-3}$
to T$_{9}$=10$^{1}$ both in the tabular form and in the analytical form. The
calculated reaction rate is compared with the reaction rates of the CF88 and
the NACRE compilations. The CF88 rate is valid at $T_{9} > 0.028$ due to lack
of the off-resonant contribution. The CF88 rate differs from the present rate
by a factor of two in a temperature range $T_{9} \geq 0.1$. The NACRE rate,
which adopted different sources of experimental information on resonance states
in $^{9}$Be, is 4--12 times larger than the present rate at $T_{9} \leq 0.028$,
but is consistent with the present rate to within $\pm 20 %$ at $T_{9} \geq
0.1$.


title:
Equivalence of the long-wavelength approximation and the truncated
  Taylor expansion in relativistic Coulomb excitation

abstract:
  The long-wavelength approximation and the truncated Taylor expansion are
frequently used in the theory of relativistic Coulomb excitation to obtain
multipole expansions of the interaction. It is shown in this note that these
two approximations are exactly equivalent.


title:
Probing the Short-Range Dynamics in Exclusive Scattering off Polarized
  Deuteron

abstract:
  Employing the polarization degrees of freedom in the deuteron allows to
isolate smaller than average inter-nucleon distances in the deuteron. As a
result one can identify set of high $Q^2$ reactions off polarized deuteron
which are particularly sensitive to the short range dynamics of strong
interaction. We concentrate on the studies of several aspects of the short
range phenomena. These are the relativistic dynamics of electron--bound-nucleon
scattering, color coherence in high $Q^2$ electro-production as well as the
formation of the vector mesons in coherent electro-production from the
deuteron. We address also the issue of extraction of polarized deep inelastic
structure function of the neutron.


title:
A parameter-free optical potential for the heavy-ion elastic scattering
  proces

abstract:
  Thirty elastic scattering angular distributions for seven heavy-ion systems,
in wide energy ranges, have been studied with the aim of systematizing the
optical potential, real and imaginary parts, in a global way. The framework is:
i) an extensive systematization of nuclear densities, ii) the energy dependence
of the bare potential accounted by a model based on the nonlocal nature of the
interaction, and iii) the real and imaginary parts of the optical potential
assumed to have the same radial shape.


title: $\pi$NN coupling and two-pion photoproduction on the nucleon

abstract:
  Effects of non-resonant photoproductions arising from two different $\pi NN$
couplings are investigated in the $\gamma N\to\pi\pi N$ reaction. We find that
the pseudoscalar (PS) $\pi NN$ coupling is generally preferable to the
pseudovector (PV) $\pi NN$ coupling and particularly the total cross sections
are successfully described by the model with the PS $\pi NN$ coupling. In order
to see the difference between the two couplings, we also show the results of
invariant mass spectra and helicity-dependent cross sections in various isospin
channels calculated with the PS and PV couplings.


title: Deformed two center shell model

abstract:
  A highly specialized two-center shell model has been developed accounting for
the splitting of a deformed parent nucleus into two ellipsoidaly deformed
fragments. The potential is based on deformed oscillator wells in direct
correspondance with the shape change of the nuclear system. For the first time
a potential responsible for the necking part between the fragments is
introduced on potential theory basis. As a direct consequence, spin-orbit {\bf
ls} and {\bf l$^2$} operators are calculated as shape dependent. Level scheme
evolution along the fission path for pairs of ellipsoidaly deformed fragments
is calculated. The Strutinsky method yields the shell corrections for different
mass asymmetries from the superheavy nucleus $^{306}$122 and $^{252}$Cf all
along the splitting process.


title:
CEM2k and LAQGSM as Event Generators for Space-Radiation-Shielding and
  Cosmic-Ray-Propagation Applications

abstract:
  The CEM2k and LAQGSM codes have been recently developed at Los Alamos
National Laboratory to simulate nuclear reactions for a number of applications.
We have benchmarked our codes against most available measured data at incident
particle energies from 10 MeV to 800 GeV and have compared our results with
predictions of other current models used by the nuclear community. Here, we
present a brief description of our codes and show illustrative results to show
that CEM2k and LAQGSM can be used as reliable event generators for
space-radiation-shielding, cosmic-ray-propagation, and other astrophysical
applications. Finally, we show the use of our calculated cross sections
together with experimental data from our LANL T-16 compilation to produce
evaluated files which we use in the GALPROP model of galactic particle
propagation to better constrain the size of the CR halo.


title: Generalized Partial Dynamical Symmetries in Nuclear Spectroscopy

abstract:
  Explicit forms of IBM Hamiltonians with a generalized partial dynamical O(6)
symmetry are presented and compared with empirical data in $^{162}$Dy.


title:
Phase transition from nuclear matter to color superconducting quark
  matter

abstract:
  We construct the nuclear and quark matter equations of state at zero
temperature in an effective quark theory (the Nambu-Jona-Lasinio model), and
discuss the phase transition between them. The nuclear matter equation of state
is based on the quark-diquark description of the single nucleon, while the
quark matter equation of state includes the effects of scalar diquark
condensation (color superconductivity). The effect of diquark condensation on
the phase transition is discussed in detail.


title:
Analytical expressions of the dispersive contributions of the nuclear
  optical model

abstract:
  Analytical solutions of dispersion relations in the nuclear optical model
have been found for both imaginary volume and surface potentials. A standard
Brown-Rho shape has been assumed for the volume imaginary term and a Brown-Rho
shape multiplied by a decreasing exponential for the surface contribution. The
analytical solutions are valid for any even value of the exponent appearing in
these functional forms.


title: np-nh bands in the N=28 isotones

abstract:
  The existence of n-particle n-hole deformed yrare bands in the N=28 isotones
is explored using full pf-shell diagonalizations and the Lanczos Strength
Function method. We find different 2p-2h and 4p-4h collective bands that, when
allowed to mix, more often disappear. Only the 2p-2h yrare band in Cr-52 and
the 4p-4h yrare band in Ni-56 survive, and only in this latter case, due to the
reduced density of 2p-2h states, can the band be seen as a gamma-cascade.


title: Some remarks on the statistical model of heavy ion collisions

abstract:
  This contribution is an attempt to assess what can be learned from the
remarkable success of the statistical model in describing ratios of particle
abundances in ultra-relativistic heavy ion collisions.


title:
Systematics of Proton-Induced Fission Cross Sections for Intermediate
  Energy Applications

abstract:
  The recent systematics of proton-induced fission cross sections is extended
to a wider range of target nuclei and incident energies. Reasonable agreement
with available experimental data is demonstrated. The extended systematics is
employed to generate a data library for use in the CINDER'90 transmutation
inventory code.


title: Effects of surface vibrations on quadrupole response of nuclei

abstract:
  The effect of quadrupole-type surface vibrations on the quadrupole response
function of heavy nuclei is studied by using a model based on the solution of
the linearized Vlasov equation with moving-surface boundary conditions. By
using a separable approximation for the residual interaction, an analytical
expression is obtained for the moving-surface response function. Comparison of
the fixed- and moving-surface strength functions shows that surface vibrations
are essential in order to achieve a unified description of the two
characteristic features of the quadrupole response: the giant resonance and the
low-lying states. Calculations performed by setting the surface tension equal
to zero shows that the low-lying strength is strongly affected by the surface
tension.


title: Constraining the Leading Weak Axial Two-body Current by SNO and Super-K

abstract:
  We analyze the Sudbury Neutrino Observatory (SNO) and Super-Kamiokande (SK)
data on charged current (CC), neutral current (NC) and neutrino electron
elastic scattering (ES) reactions to constrain the leading weak axial two-body
current parameterized by L_1A. This two-body current is the dominant
uncertainty of every low energy weak interaction deuteron breakup process,
including SNO's CC and NC reactions. Our method shows that the theoretical
inputs to SNO's determination of the CC and NC fluxes can be self-calibrated,
be calibrated by SK, or be calibrated by reactor data. The only assumption made
is that the total flux of active neutrinos has the standard ^8B spectral shape
(but distortions in the electron neutrino spectrum are allowed). We show that
SNO's conclusion about the inconsistency of the no-flavor-conversion hypothesis
does not contain significant theoretical uncertainty, and we determine the
magnitude of the active solar neutrino flux.


title: Clusters and condensates in Fermi systems

abstract:
  Superconductivity, superfluidity, condensation, cluster formation, etc. are
phenomena that might occur in many-particle systems. These are due to residual
interactions between the particles. To explain these phenomena consistently in
a microscopic approach, at some point, one needs to solve few-body equations
that are modified because of the Pauli principle and the interactions of the
many particles around.


title: $J/\psi$ dissociation by pions in QCD

abstract:
  We compute the $J/\psi \pi\to {charmed mesons}$ cross section using QCD sum
rules. This cross section is important to distinguish the suppression in the
production of $J/\psi$ through the dissociation by comoving pions and through
the formation of quark-gluon plasma. Our sum rules for the $J/\psi \pi\to
\bar{D} D^*$, $D \bar{D}^*$, ${\bar D}^* D^*$ and ${\bar D} D$ hadronic matrix
elements are constructed by using vaccum-pion correlation functions, and we
work up to twist-4 in the soft-pion limit. After doing a thermal average we get
$<\sigma^{\pi J/\psi} v>\sim 0.2 - 0.4$ mb at $T=150\MeV$


title: Landau-Zener effect in superfluid nuclear systems

abstract:
  The Landau--Zener effect is generalized for many-body systems with pairing
residual interactions. The microscopic equations of motion are obtained and the
$^{14}$C decay of $^{223}$Ra spectroscopic factors are deduced. An asymmetric
nuclear shape parametrization given by two intersected spheres is used. The
single particle level scheme is determined in the frame of the superasymmetric
two-center shell. The deformation energy is computed in the
microscopic-macroscopic approximation. The penetrabilities are obtained within
the WKB approximation. The fine structure of the cluster decay analyzed in the
frame of this formalism gives a very good agreement with the experimental ratio
of partial half-lives obtained in special conditions


title: Chiral dynamics in systems with strangeness

abstract:
  In this talk a brief review of several problems involving systems with
strangeness is made. In the first place one shows how the $\Lambda (1405)$,
$\Lambda(1670)$ and $\Sigma(1620)$ states, for $S = -1$, and the $\Xi(1620)$
for $S= -2$ are generated dynamically in the context of unitarized chiral
perturbation theory. The results for the $\bar{K}N$ interaction are then used
to evaluate the $K^- d$ scattering length. Results obtained for the kaon
selfenergy in a nuclear medium within this approach, with application to $K^-$
atoms, are also mentioned. Finally a few words are said about recent
developments in the weak decay of $\Lambda$ hypernuclei and the puzzle of the
$\Gamma_n/\Gamma_p$ ratio.


title:
Production mechanisms and polarization observables for p + d -> He(3) +
  pi(o) near threshold

abstract:
  Pion production at threshold from nucleon-deuteron collisions is considered,
with reference to the outgoing channel where the three-nucleon system is bound.
The available experimental data are compared with calculations using accurate
nuclear wavefunctions coming from rigorous solutions of the three-nucleon
quantum mechanical equations. The dominant contributions for pion production
are obtained through matrix elements involving pion-nucleon rescattering
mechanisms in S- and P-waves. S-wave rescattering includes also an isoscalar
contribution which is enhanced because of the off-shell effects. P-wave
rescattering includes also diagrams involving explicitly the Delta degrees of
freedom. It is found that the pion-nucleon S-wave off-shell effects in the
isospin-even channel are of considerable importance. Initial-state interactions
between the proton and the deuteron have in general minor effects on the
spin-averaged and spin-dependent observables, except when the polarization
observable involves interference terms amongst the various helicity amplitudes.
  Keywords: Polarization phenomena. Pion production. Few-nucleon systems.


title: Photoproduction of phi mesons from nuclei

abstract:
  We investigate the consequences of possible medium modifications of the phi
meson at finite nuclear matter density on the K+K- mass distribution in
photonuclear reactions. The inclusive cross sections for K+K- pair production
are calculated within a semi--classical BUU transport model, which combines the
initial state interaction of the incoming photon with the final state
interactions of the produced particles. The effects of final state interactions
on the invariant mass distribution of the observed K+K- pairs are discussed in
detail. In addition we calculate the Coulomb correction and possible effects of
hadronic kaon potentials on the K+K- mass spectrum. Due to the large cross
sections for reactions of the final state particles with the surrounding
nuclear medium and the influence of the Coulomb potential we find no measurable
sensitivity of the observables to the phi properties at finite baryon density.


title: Migdal's short range correlations in a covariant model

abstract:
  We construct a covariant model for short range correlations of a pion emerged
in nuclear matter. Once the delta-hole contribution is considered an additional
and so far neglected channel opens that leads to significant modifications in
the vicinity of the kinematical region defined by \omega \sim |\vec q |. We
speculate that this novel effect should be important for the quantitative
interpretation of charge exchange reactions like C(He,t).


title:
Jastrow-type calculations of one-nucleon removal reactions on open
  $s$-$d$ shell nuclei

abstract:
  Single-particle overlap functions and spectroscopic factors are calculated on
the basis of Jastrow-type one-body density matrices of open-shell nuclei
constructed by using a factor cluster expansion. The calculations use the
relationship between the overlap functions corresponding to bound states of the
$(A-1)$-particle system and the one-body density matrix for the ground state of
the $A$-particle system. In this work we extend our previous analyses of
reactions on closed-shell nuclei by using the resulting overlap functions for
the description of the cross sections of $(p,d)$ reactions on the open $s$-$d$
shell nuclei $^{24}$Mg, $^{28}$Si and $^{32}$S and of $^{32}$S$(e,e^{\prime}p)$
reaction. The relative role of both shell structure and short-range
correlations incorporated in the correlation approach on the spectroscopic
factors and the reaction cross sections is pointed out.


title: Quark-Exchange Mechanism of $\gamma d \to np$ Reaction At 2-6 GeV

abstract:
  Within the constituent quark model, we examine the extent to which the
deuteron photo-disintegration at 2-6 GeV can be described by the quark-exchange
mechanism. With the parameters constrained by the $np$ scattering, the
calculated differential cross sections disagree with the data in both magnitude
and energy-dependence. The results can be improved if we use a smaller size
parameter for quark wavefunctions. We also find that the on-shell approximation
used in a previous investigation is not accurate


title: Infinite Component Relativistic Wave Equations

abstract:
  We construct an infinite component relativistic wave equation which is a
linear first order differential equation identical in form to a Dirac like
equation, describing composite fields possessing multiple spin and energy
states. The main motivation for such a construction is to give a description of
Hadronic fields moving along their so called Regge Trajectories, however this
may be generalized to other composite fields. In order to construct the
equation so that it may accommodate physical states the concept of Spin Frames
is introduced, and it is found that such an equation may propagate physical
fields whose spin states differ by two units of angular momentum namely $\Delta
J=2$. The solution for the free field case is given by boosting a rest frame
spinor with the infinite dimensional Lorentz Boost which are constructed as
well. Finally we discuss the relevance of the groups GL(4R), and GL(3,1,R) and
their appearance with regards to the wave equation at hand.


title: An Effective Field Theory for the Three-Body System

abstract:
  We study the scattering of a particle from a bound pair in an effective field
theory using a distorted-wave renormalisation group method to find the
power-counting for the three-body force terms. We find that three-body terms
appear at lower orders than naively expected. They start with a marginal term
that varies as a logarithm rather than a power of the energy scales in the
problem. The marginal term has important implications for the three-body
problem in nuclear physics.


title:
Self-Consistent Hartree-Fock Based Random Phase Approximation And The
  Spurious State Mixing

abstract:
  We use a fully self-consistent Hartree$-$Fock (HF) based continuum random
phase approximation (CRPA) to calculate strength functions $S(E)$ and
transition densities $\rho_t(r)$ for isoscalar giant resonances with
multipolarities $L = 0$, 1 and 2 in $^{80}Zr$ nucleus. In particular, we
consider the effects of spurious state mixing (SSM) in the isoscalar giant
dipole resonance (ISGDR) and extend the projection method to determine the
mixing amplitude of spurious state so that properly normalized $S(E)$ and
$\rho_t(r)$ having no contribution due to SSM can be obtained. For the
calculation to be highly accurate we use a very fine radial mesh (0.04 fm) and
zero smearing width in HF$-$CRPA calculations. We first use our most accurate
results as a basis to establish the credibility of the projection method,
employed to eliminate the SSM, and then to investigate the consequences of the
common violation of self-consistency, in actual implementation of HF based CRPA
and discretized RPA (DRPA), as often encountered in the published literature.
The HF$-$DRPA calculations are carried out using a typical box size of 12 fm
and a very large box of 72 fm, for different values of particle-hole energy
cutoff ranging from 50 to 600 MeV.


title: Role of effective interaction in nuclear disintegration processes

abstract:
  A simple superasymmetric fission model using microscopically calculated
nuclear potentials has shown itself to be outstandingly successful in
describing highly asymmetric spontaneous disintegration of nuclei into two
composite nuclear fragments. The nuclear interaction potentials required to
describe these nuclear decay processes have been calculated by double folding
the density distribution functions of the two fragments with a realistic
effective interaction. The microscopic nucleus-nucleus potential thus obtained,
along with the Coulomb interaction potential and the minimum centrifugal
barrier required for the spin-parity conservation, has been used successfully
for the lifetime calculations of these nuclear disintegration processes.


title: Relativistic Kinetic Equations for Finite Domains and Freeze-out Problem

abstract:
  The relativistic kinetic equations for the two domains separated by the
hypersurface with both space- and time-like parts are derived. The particle
exchange between the domains separated by the time-like boundaries generates
source terms and modifies the collision term of the kinetic equation. The
correct hydrodynamic equations for the ``hydro+cascade'' models are obtained
and their differences from existing freeze-out models of the hadronic matter
are discussed.


title:
Dynamical moments of inertia associated with wobbling motion in the
  triaxial superdeformed nucleus

abstract:
  The three moments of inertia associated with the wobbling mode built on the
triaxial superdeformed states in Lu--Hf region are investigated by means of the
cranked shell model plus random-phase approximation to the configurations with
aligned quasiparticle(s). The result indicates that it is crucial to take into
account the direct contribution to the moments of inertia from the aligned
quasiparticle(s) so as to realize \mathcal{J}_x > \mathcal{J}_y in
positive-\gamma shapes.


title: How magic is the magic 68Ni nucleus?

abstract:
  We calculate the B(E2) strength in 68Ni and other nickel isotopes using
several theoretical approaches. We find that in 68Ni the gamma transition to
the first 2+ state exhausts only a fraction of the total B(E2) strength, which
is mainly collected in excited states around 5 MeV. This effect is sensitive to
the energy splitting between the fp shell and the g_{9/2}orbital. We argue that
the small experimental B(E2) value is not strong evidence for the double-magic
character of 68Ni.


title:
Relativistic Mean Field Model with Generalized Derivative Nucleon-Meson
  Couplings

abstract:
  The quantum hadrodynamics (QHD) model with minimal nucleon-meson couplings is
generalized by introducing couplings of mesons to derivatives of the nucleon
field in the Lagrangian density. This approach allows an effective description
of a state-dependent in-medium interaction in the mean-field approximation.
Various parametrizations for the generalized couplings are developed and
applied to infinite nuclear matter. In this approach, scalar and vector
self-energies depend on both density and momentum similarly as in the
Dirac-Brueckner theory. The Schr\"{o}diger-equivalent optical potential is much
less repulsive at high nucleon energies as compared to standard relativistic
mean field models and thus agrees better with experimental findings. The
derivative couplings in the extended model have significant effects on
properties of symmetric nuclear matter and neutron matter.


title: Short-range NN-properties in the processes $pd\to dp$ and $pd\to (pp)n$

abstract:
  The data from the first measurement, performed at ANKE/COSY, of the
unpolarized cross section of the reaction $pd\to (pp)n$ in the kinematics of
backward elastic $pd\to dp$ scattering at proton-beam energies between 0.6 and
1.9 GeV are analyzed in a phenomenological approach. The $pd\to (pp)n$ data and
the triplet cross section of the reaction $pd\to (pn)p$, calculated from the
$pd\to dp$ data on the basis of the F\"aldt-Wilkin extrapolation, are used here
to derive the ratio $\zeta$ of the singlet production matrix element squared to
the triplet one. This ratio, defined in our earlier analysis of $pd\to (pn)p$
data in a largely model-independent way, depends on the dynamics of the $pd$
interaction. We find here
  $\zeta\approx 0.02$ and show that the smallness of this value may point
toward softness of the deuteron at short NN distances.


title:
Effect of symmetry energy on two-nucleon correlation functions in
  heavy-ion collisions induced by neutron-rich nuclei

abstract:
  Using an isospin-dependent transport model, we study the effects of nuclear
symmetry energy on two-nucleon correlation functions in heavy ion collisions
induced by neutron-rich nuclei. We find that the density dependence of the
nuclear symmetry energy affects significantly the nucleon emission times in
these collisions, leading to larger values of two-nucleon correlation functions
for a symmetry energy that has a stronger density dependence. Two-nucleon
correlation functions are thus useful tools for extracting information about
the nuclear symmetry energy from heavy ion collisions.


title: Neutrino mean free path and in-medium nuclear interaction

abstract:
  Neutrinos produced during the collapse of a massive star are trapped in a
nuclear medium (the proto-neutron star). Typically, neutrino energies (10-100
MeV) are of the order of nuclear giant resonances energies. Hence, neutrino
propagation is modified by the possibility of coherent scattering on nucleons.
We have compared the predictions of different nuclear interaction models. It
turns out that their main discrepancies are related to the density dependence
of the k-effective mass as well as to the onset of instabilities as density
increases. This last point had led us to a systematic study of instabilities of
infinite matter with effective Skyrme-type interactions. We have shown that for
such interactions there is always a critical density, above which the system
becomes unstable.


title: Two-proton emission induced by electron scattering

abstract:
  We present a model to describe the emission of two protons in electron
scattering experiments. The process is induced by one-body electromagnetic
operators acting together with short-range correlations, and by two-body Delta
currents. The model includes all the diagrams containing a single correlation
function. The sensitivity of the cross section to the details of the
correlation function is studied by using realistic and schematic correlations.
Results for the 16O nucleus are presented.


title: Short-range correlations in finite nuclear systems

abstract:
  Recent results concerning the use of the Correlated Basis Function to
investigate the ground state properties of medium-heavy doubly magic nuclei
with microscopic interactions are presented. The calculations have been done by
considering a Short-Range Correlation between nucleons. The possibility of
identifying effects produced by Short-Range Correlations in electromagnetically
induced phenomena is discussed.


title:
Gauge and Lorentz invariant pionic correlations in quasi-elastic
  electron scattering

abstract:
  The role of the pion in the parity-conserving and parity-violating
quasi-elastic nuclear response functions is analyzed within a relativistic
model which fulfills gauge invariance.


title: Meson exchange currents in electromagnetic one-nucleon emission

abstract:
  The role of meson exchange currents (MEC) in electron- and photon-induced
one-nucleon emission processes is studied in a nonrelativistic model including
correlations and final state interactions. The nuclear current is the sum of a
one-body and of a two-body part. The two-body current includes pion seagull,
pion-in-flight and the isobar current contributions. Numerical results are
presented for the exclusive 16O(e,e'p)15N and 16O(\gamma,p)15N reactions. MEC
effects are in general rather small in (e,e'p), while in (\gamma,p) they are
always large and important to obtain a consistent description of (e,e'p) and
(\gamma,p) data, with the same spectroscopic factors. The calculated (\gamma,p)
cross sections are sensitive to short-range correlations at high values of the
recoil momentum, where MEC effects are larger and overwhelm the contribution of
correlations.


title: Three-Nucleon Force in the 4He Scattering System

abstract:
  We report on a consistent, microscopic calculation of the bound and
scattering states in the 4He system employing modern realistic two-nucleon and
three-nucleon potentials in the framework of the resonating group model (RGM).
We present for comparison with these microscopic RGM calculations the results
from a charge-independent, Coulomb-corrected R-matrix analysis of all types of
data for reactions in the A=4 system. Comparisons are made for selected
examples of phase shifts and measurements from reactions sensitive to
three-nucleon force effects.


title:
Interaction Strengths for the Fock-Space Formulation of the Nuclear
  Pairing Problem

abstract:
  A realistic nuclear mean-field hamiltonian with pairing has been diagonalized
using Fock space representation that allows for nearly exact treatment of the
problem. Calculations were performed for all the even-even nuclei with Z in
(20, 100), whose pairing gaps were possible to extract out of the experimental
masses. The optimal values of the pairing strength constants for the protons
and neutrons have been found.


title: Scaling behavior at high p_T and the p/pi ratio

abstract:
  We first show that the pions produced at high $p_T$ in heavy-ion collisions
over a wide range of high energies exhibit a scaling behavior when the
distributions are plotted in terms of a scaling variable. We then use the
recombination model to calculate the scaling quark distribution just before
hadronization. From the quark distribution it is then possible to calculate the
proton distribution at high $p_T$, also in the framework of the recombination
model. The resultant $p/\pi$ ratio exceeds one in the intermediate $p_T$ region
where data exist, but the scaling result for the proton distribution is not
reliable unless $p_T$ is high enough to be insensitive to the scale-breaking
mass effects.


title: Hadron production in deep inelastic lepton-nucleus scattering

abstract:
  Predictions for semi-inclusive deep inelastic lepton-nucleus scattering are
presented. Both the effects of gluon radiation by the struck quark and the
absorption of the produced hadron are considered. The gluon radiation covers a
larger window in virtuality $Q^2$ because of the increased deconfinement of
quarks inside nuclei. The absorption of hadrons formed inside the nucleus is
described with a flavor dependent cross section. Calculations for rescaled
fragmentation functions and nuclear absorption are compared with the EMC and
HERMES data for N, Cu and Kr targets with respect to the deuteron target.
Predictions for Ne and Xe targets in the HERMES kinematic regime are given.


title: Kerman-Klein-Donau-Frauendorf model for odd-odd nuclei: formal theory

abstract:
  The Kerman-Klein-Donau-Frauendorf (KKDF) model is a linearized version of the
Kerman-Klein (equations of motion) formulation of the nuclear many-body
problem. In practice, it is a generalization of the standard core-particle
coupling model that, like the latter, provides a description of the
spectroscopy of odd nuclei in terms of the properties of neighboring even
nuclei and of single-particle properties, that are the input parameters of the
model. A divers sample of recent applications attest to the usefulness of the
model. In this paper, we first present a concise general review of the
fundamental equations and properties of the KKDF model. We then derive a
corresponding formalism for odd-odd nuclei that relates their properties to
those of four neighboring even nuclei, all of which enter if one is to include
both multipole and pairing forces. We treat these equations in two ways. In the
first we make essential use of the solutions of the neighboring odd nucleus
problem, as obtained by the KKDF method. In the second, we relate the
properties of the odd-odd nuclei directly to those of the even nuclei. For both
choices, we derive equations of motion, normalization conditions, and an
expression for transition amplitudes. We also solve the problem of choosing the
subspace of physical solutions that arises in an equations of motion approach
that includes pairing interactions.


title: Quenching of Weak Interactions in Nucleon Matter

abstract:
  We have calculated the one-body Fermi and Gamow-Teller charge-current, and
vector and axial-vector neutral-current nuclear matrix elements in nucleon
matter at densities of 0.08, 0.16 and 0.24 fm$^{-3}$ and proton fractions
ranging from 0.2 to 0.5. The correlated states for nucleon matter are obtained
by operating on Fermi-gas states by a symmetrized product of pair correlation
operators determined from variational calculations with the Argonne v18 and
Urbana IX two- and three-nucleon interactions. The squares of the charge
current matrix elements are found to be quenched by 20 to 25 % by the
short-range correlations in nucleon matter. Most of the quenching is due to
spin-isospin correlations induced by the pion exchange interactions which
change the isospins and spins of the nucleons. A large part of it can be
related to the probability for a spin up proton quasi-particle to be a bare
spin up/down proton/neutron. We also calculate the matrix elements of the
nuclear Hamiltonian in the same correlated basis. These provide relatively mild
effective interactions which give the variational energies in the Hartree-Fock
approximation. The calculated two-nucleon effective interaction describes the
spin-isospin susceptibilities of nuclear and neutron matter fairly accurately.
However $\geq$ 3-body terms are necessary to reproduce the compressibility. All
presented results use the simple 2-body cluster approximation to calculate the
correlated basis matrix elements.


title: FLIC Fermions and Hadron Phenomenology

abstract:
  A pedagogical overview of the formulation of the Fat Link Irrelevant Clover
(FLIC) fermion action and its associated phenomenology is described. The
scaling analysis indicates FLIC fermions provide a new form of nonperturbative
O(a) improvement where near-continuum results are obtained at finite lattice
spacing. Spin-1/2 and spin-3/2, even and odd parity baryon resonances are
investigated in quenched QCD, where the nature of the Roper resonance and
Lambda(1405) are of particular interest. FLIC fermions allow efficient access
to the light quark-mass regime, where evidence of chiral nonanalytic behavior
in the Delta-baryon mass is observed.


title: Low Mass Neutron Stars and the Equation of State of Dense Matter

abstract:
  Neutron-star radii provide useful information on the equation of state of
neutron rich matter. Particularly interesting is the density dependence of the
equation of state (EOS). For example, the softening of the EOS at high density,
where the pressure rises slower than anticipated, could signal a transition to
an exotic phase. However, extracting the density dependence of the EOS requires
measuring the radii of neutron stars for a broad range of masses. A ``normal''
1.4 solar mass neutron star has a central density of a few times nuclear-matter
saturation density. In contrast, low mass (of the order of 0.5 solar masses)
neutron stars have central densities near nuclear-matter saturation density so
its radius provides information on the EOS at low density. Unfortunately,
low-mass stars are rare because they may be hard to form. Instead, a precision
measurement of nuclear radii on atomic nuclei may contain similar information.
Indeed, we find a strong correlation between the neutron radius of 208Pb and
the radius of a 0.5 solar-mass neutron star. Thus, the radius of such a neutron
star can be inferred from a measurement of the the neutron radius of 208Pb.
Comparing this value to the measured radius of a 1.4 solar-mass neutron star
should provide the strongest constraint to date on the density dependence of
the equation of state.


title: Scattering Calculations with Wavelets

abstract:
  We show that the use of wavelet bases for solving the momentum-space
scattering integral equation leads to sparse matrices which can simplify the
solution. Wavelet bases are applied to calculate the K-matrix for
nucleon-nucleon scattering with the s-wave Malfliet-Tjon V potential. We
introduce a new method, which uses special properties of the wavelets, for
evaluating the singular part of the integral. Analysis of this test problem
indicates that a significant reduction in computational size can be achieved
for realistic few-body scattering problems.


title:
Differential freezeout and pion interferometry at RHIC from covariant
  transport theory

abstract:
  Puzzling discrepancies between recent pion interferometry data on Au+Au
reactions at s^1/2 = 130 and 200 AGeV from RHIC and predictions based on ideal
hydrodynamics are analyzed in terms of covariant parton transport theory. The
discrepancies of out and longitudinal radii are significantly reduced when the
finite opacity of the gluon plasma is taken into account.


title: Poincare Invariance, Cluster Properties, and Particle Production

abstract:
  A method is presented for constructing a class of Poincare invariant quantum
mechanical models of systems of a finite number of degrees of freedom that
satisfy cluster separability, the spectral condition, but do not conserve
particle number. The class of models includes the relativistic Lee model and
relativistic isobar models.


title: Relativity in polarized electron scattering observables

abstract:
  Coincidence scattering of polarized electrons from nuclei with polarization
transfer to outgoing nucleons is studied within the context of relativistic
mean field theory. Effects introduced by the dynamical enhancement of the lower
components of the bound and scattered nucleon wave functions are analyzed for
the polarized response functions and transferred polarization asymmetries.
Results obtained by projecting out the negative-energy components are compared
with the fully-relativistic calculation. The crucial role played by the
relativistic dynamics in some spin-dependent observables is clearly manifested
even for low/medium values of the missing momentum. Kinematical relativistic
effects are also analyzed. A discussion of the factorization approach and the
mechanism for its breakdown is also briefly presented.


title: Xi production at AGS energies

abstract:
  A relativistic transport model is used to study Xi- production in 2-11A GeV
Au+Au collisions. Introducing the strangeness-exchange reactions between
antikaons and hyperons as the sources for Xi-, we find that the cascade yield
in these collisions is in reasonable agreement with the data. Although the Xi-
abundance does not reach chemical equilibrium unless the cross section for
strangeness-exchange reactions is enhanced by six times, it exhibits the
strongest enhancement with increasing centrality of collision and with
increasing beam energy.


title: Quadrupole and octupole softness in the N=Z nucleus 64Ge

abstract:
  Quadrupole and octupole softness in the even-even N=Z nucleus 64Ge is studied
on the spherical shell model basis. We carry out the shell model calculation
using the pairing plus quadrupole (QQ) plus octupole (OO) interaction with
monopole corrections. It is shown that 64Ge is an unstable nucleus with respect
to both the quadrupole and octupole deformations, which is consistent with the
previous discussions predicting the gamma softness and octupole instability. It
is demonstrated that proton-neutron part QpQn of the QQ interaction is
important for the gamma softness or triaxiality.


title: Nuclear Reactions Important in Alpha-Rich Freezeouts

abstract:
  The alpha-rich freezeout from equilibrium occurs during the core-collapse
explosion of a massive star when the supernova shock wave passes through the
Si-rich shell of the star. The nuclei are heated to high temperature and broken
down into nucleons and alpha particles. These subsequently reassemble as the
material expands and cools, thereby producing new heavy nuclei, including a
number of important supernova observables. In this paper we introduce two
web-based applications. The first displays the results of a reaction-rate
sensitivity study of alpha-rich freezeout yields. The second allows the
interested reader to run paramaterized explosive silicon burning calculations
in which the user inputs his own parameters. These tools are intended to aid in
the identification of nuclear reaction rates important for experimental study.
We then analyze several iron-group isotopes (59Ni, 57Co, 56Co, and 55Fe) in
terms of their roles as observables and examine the reaction rates that are
important in their production.


title: Relativistic approach to one nucleon knockout reactions

abstract:
  We develop a fully relativistic distorted wave impulse approximation model
for electron- and photon-induced one proton knockout reactions. The
relativistic mean field for the bound state and the Pauli reduction for the
scattering state are used, including a fully relativistic electromagnetic
current operator. Results for 16O(e,e'p) cross section and structure functions
are shown in various kinematic conditions and compared with nonrelativistic
calculations. Nuclear transparency calculations in a Q^2 range between 0.3 and
1.8 (GeV/c)^2 are presented. Results for 16O(gamma,p) differential cross
sections are displayed in an energy range between 60 and 150 MeV including
two-body seagull contribution in the nuclear current.


title:
The Role of Mass Asymmetry and Shell Structure in the Evaporation
  Residues Production

abstract:
  The effects of the entrance channel and shell structure of reacting nuclei on
the experimental evaporation residues have been studied by analysing the
40Ar+176Hf, 86Kr+130,136Xe, 124Sn+92Zr and 48Ca+174Yb reactions leading to the
216Th* and 222Th* compound nuclei. The measured excitation function of
evaporation residues for the 124Sn+92Zr reaction was larger than that for the
86Kr+130Xe reaction. The experimental values of evaporation residues in the
86Kr+136Xe reaction were about 500 times larger than that in the 86Kr+130Xe
reaction. These results are explained by the initial angular momentum
dependence of the fusion excitation functions calculated in framework of the
dinuclear system concept and by the differences in survival probabilities
calculated in framework of advanced statistical model. The dependencies of the
fission barrier and the \Gamma_n / \Gamma_f ratio on the angular momentum of
the excited compound nucleus are taken into account.


title: Determination of Matter Surface Distribution of Neutron-rich Nuclei

abstract:
  We demonstrate that the matter density distribution in the surface region is
determined well by the use of the relatively low-intensity beams that become
available at the upcoming radioactive beam facilities. Following the method
used in the analyses of electron scattering, we examine how well the density
distribution is determined in a model-independent way by generating pseudo data
and by carefully applying statistical and systematic error analyses. We also
study how the determination becomes deteriorated in the central region of the
density, as the quality of data decreases. Determination of the density
distributions of neutron-rich nuclei is performed by fixing parameters in the
basis functions to the neighboring stable nuclei. The procedure allows that the
knowledge of the density distributions of stable nuclei assists to strengthen
the determination of their unstable isotopes.


title: Quenched Chiral Physics in Baryon Masses

abstract:
  Recent work has identified that the primary differences between quenched and
dynamical spectroscopy can be described by chiral loop effects. Here we
highlight the features of this study.


title: Baryon Resonance Phenomenology

abstract:
  The Japan Hadron Facility will provide an unprecedented opportunity for the
study of baryon resonance properties. This talk will focus on the chiral
nonanalytic behaviour of magnetic moments exclusive to baryons with open decay
channels. To illustrate the novel features associated with an open decay
channel, we consider the ``Access'' quark model, where an analytic continuation
of chiral perturbation theory is employed to connect results obtained using the
constituent quark model in the limit of SU(3)-flavour symmetry to empirical
determinations.


title: Pion-nucleus optical potential valid up to the DELTA-resonance region

abstract:
  We present in this article an optical potential for the $\pi$-nucleus
interaction that can be used in various studies involving $\pi$-nucleus
channels. Based on earlier treatments of the low energy $\pi$-nucleus optical
potential, we have derived a potential expression applicable from threshold up
to the $\Delta$-resonance region. We extracted the impulse approximation form
for this potential from the $\pi-N$ scattering amplitude and then added to it
kinematical and physical corrections. The kinematic corrections arise from
transforming the impulse approximation expression from the $\pi-N$ center of
mass frame to the $\pi$-nucleus center of mass frame, while the physical
corrections arise mostly from the many-body nature of the $\pi$-nucleus
interaction. By taking advantage of the experimental progress in our knowledge
of the $\pi-N$ process, we have updated earlier treatments with parameters
calculated from state-of-the-art experimental measurements.


title:
The nucleon and the nuclear force in the context of effective theory and
  path-integral methods

abstract:
  The nucleon structure and the nuclear force are investigated in the context
of the non-perturbative path-integral method of hadronization. Starting from a
microscopic quark-diquark model, the nucleon is generated as a relativistic
bound state and an effective chiral meson-nucleon Lagrangian is derived. Many
of the nucleon physical properties are studied using a theory of at most two
free parameters.


title: A neutron star model in the nonlinear Relativistic Mean-Field Theory

abstract:
  The neutron star parameters in the RMF model extended by the inclusion of
delta meson and additional nonlinear vector meson interactions are studied.


title:
Transverse Mass Distribution Characteristics of $\pi^0$ Production in
  $^{208}$Pb-induced Reactions and the Combinational Approach

abstract:
  The nature of invariant cross-sections and multiplicities in some
$^{208}Pb$-induced reactions and some important ratio-behaviours of the
invariant multiplicities for various centralities of the collision will here be
dealt with in the light of a combinational approach which has been built up in
the recent past by the present authors. Next, the results would be compared
with the outcome of some of the simulation-based standard models for multiple
production in nuclear collisions at high energies. Finally, the implications of
all this would be discussed.


title:
Collective Properties of Low-lying Octupole Excitations in
  $^{208}_{82}Pb_{126}$, $^{60}_{20}Ca_{40}$ and $^{28}_{8}O_{20}$

abstract:
  The octupole strengths of $\beta$-stable nucleus $^{208}_{82}Pb_{126}$, a
neutron skin nucleus $^{60}_{20}Ca_{40}$ and a neutron drip line nucleus
$^{28}_{8}O_{20}$ are studied by using the self-consistent Hartree-Fock
calculation plus the random phase approximation (RPA) with Skyrme interaction.
The collective properties of low-lying excitations are analyzed by using
particle-vibration coupling. The results show that the lowest isoscalar states
above threshold in $^{60}_{20}Ca_{40}$ and $^{28}_{8}O_{20}$ are the
superpositions of collective excitations and unperturbed transitions from bound
state to nonresonance states. For these three nuclei, both the low-lying
isoscalar states and giant isoscalar resonance carry isovector strength. The
ratio B(IV)/B(IS) is checked. It is found that, for $^{208}_{82}Pb_{126}$, the
ratios are equal to $(\frac{N-Z}{A})^2$ in good accuracy, while for
$^{60}_{20}Ca_{40}$ and $^{28}_{8}O_{20}$, the ratios are much larger than
$(\frac{N-Z}{A})^2$. This results from the excess neutrons with small binding
energies in $^{60}_{20}Ca_{40}$ and $^{28}_{8}O_{20}$.


title:
Energy Level Statistics of the U(5) and O(6) Symmetries in the
  Interacting Boson Model

abstract:
  We study the energy level statistics of the states in U(5) and O(6) dynamical
symmetries of the interacting boson model and the high spin states with
backbending in U(5) symmetry. In the calculations, the degeneracy resulting
from the additional quantum number is eliminated manually. The calculated
results indicate that the finite boson number $N$ effect is prominent. When $N$
has a value close to a realistic one, increasing the interaction strength of
subgroup O(5) makes the statistics vary from Poisson-type to GOE-type and
further recover to Poisson-type. However, in the case of $N \to \infty$, they
all tend to be Poisson-type. The fluctuation property of the energy levels with
backbending in high spin states in U(5) symmetry involves a signal of shape
phase transition between spherical vibration and axial rotation.


title:
Effect of tensor couplings in a relativistic Hartree approach for finite
  nuclei

abstract:
  The relativistic Hartree approach describing the bound states of both
nucleons and anti-nucleons in finite nuclei has been extended to include tensor
couplings for the $\omega$- and $\rho$-meson. After readjusting the parameters
of the model to the properties of spherical nuclei, the effect of
tensor-coupling terms rises the spin-orbit force by a factor of 2, while a
large effective nucleon mass $m^{*}/M_{N} \approx 0.8$ sustains. The overall
nucleon spectra of shell-model states are improved evidently. The predicted
anti-nucleon spectra in the vacuum are deepened about 20 -- 30 MeV.


title: In-medium modification of the isovector pion-nucleon amplitude

abstract:
  We study the in-medium modification of the isovector pi N amplitude using a
non-linear representation of the sigma model but keeping the scalar degree of
freedom. We check that our result does not depend on the representation. We
discuss the connection with other approaches based on chiral perturbation
theory.


title:
Generalized parton distributions of the pion in a Bethe-Salpeter
  approach

abstract:
  We calculate generalized parton distribution functions in a field theoretic
formalism using a covariant Bethe-Salpeter approach for the determination of
the bound-state wave function. We describe the procedure in an exact
calculation in scalar Electrodynamics proving that the relevant corrections
outside our scheme vanish. We extend the formalism to the Nambu--Jona-Lasinio
model, a realistic theory of the pion. We go in both cases beyond all previous
calculations and discover that all important features required by general
physical considerations, like symmetry properties, sum rules and the
polynomiality condition, are explicitly verified. We perform a numerical study
of their behavior in the weak and strong coupling limits.


title:
Isospin-Dependence of $\pi^-/\pi^+$ Ratio and Density-Dependence of
  Nuclear Symmetry Energy

abstract:
  The $\pi^-/\pi^+$ ratio is examined as a function of isospin asymmetry and
beam energy for central collisions induced by neutron-rich nuclei within an
isospin-dependent hadronic transport model. The $\pi^-/\pi^+$ ratio is found to
increase with the isospin asymmetry, but decrease with the beam energy of the
reaction. For neutron-rich systems, such as, $^{124}Sn+^{124}Sn$ and
$^{132}Sn+^{124}Sn$, the sensitivity of $\pi^-/\pi^+$ ratio to nuclear symmetry
energy is almost beam energy independent.


title: Neutron star structure in a quark model with excluded volume correction

abstract:
  We study the effects of the finite size of baryons on the equation of state
of homogeneous hadronic matter. The finite extension of hadrons is introduced
in order to improve the performance of field theoretical models at very high
densities. We simulate the in-medium averaged baryon-baryon strong repulsion at
very short distances by introducing a Van der Waals like normalization of the
fields. This is done in the framework of the Quark Meson Coupling model, that
allows to take care of the quark structure of baryons. Since within this model
the confinement volume evolves with the fields configuration, the treatment is
not equivalent to a simple hard-core potential. We investigate the phase
transition to quark matter and the structure of neutron stars. We have found
significant corrections at high densities.


title: Effective non-Hermitian Hamiltonian and continuum shell model

abstract:
  The intrinsic dynamics of a system with open decay channels is described by
an effective non-Hermitian Hamiltonian which at the same time allows one to
find the external dynamics, - reaction cross sections. We discuss ways of
incorporating this approach into the shell model context. Several examples of
increasing complexity, from schematic models to realistic nuclear calculations
(chain of oxygen isotopes), are presented. The approach is capable of
describing a multitude of phenomena in a unified way combining physics of
structure and reactions. Self-consistency of calculations and threshold energy
dependence of the coupling to the continuum are crucial for the description of
loosely bound states.


title:
Pionic Degrees of Freedom in Atomic Nuclei and Quasielastic Knockout of
  Pions by High-Energy Electrons

abstract:
  The nonlinear model of pionic condensate in nuclei by G. Preparata can be
efficiently verified by investigation of the quasielastic knockout process of
pions out of nuclei by high energy electrons. First, a momentum distribution
(MD) of the collective pions has a bright maximum at q=0.3 Gev.Second the
excitation spectrum of a recoil nucleus is concentrated at low energies E
lesser than 1MeV. The results for the pion knockout from mesonic clouds of
individual nucleons are absolutely different. The latter results are presented
both for pion and rho-meson clouds localized on nucleons.


title: Short-range Effects on Nuclear Pairing

abstract:
  We determine the influence of the three-body force and the medium
modification of meson masses on pairing in nuclear and neutron matter. A
reduction of the pairing gap is found and increasing with density.


title: Coulomb-nuclear interference in the breakup of $^{11}$Be

abstract:
  Within a theory of breakup reactions formulated in the framework of the post
form distorted wave Born approximation, we calculate contributions of the pure
Coulomb and the pure nuclear breakup as well as those of their interference
terms to a variety of cross sections in breakup reactions of the one-neutron
halo nucleus $^{11}$Be on a number of target nuclei. In contrast to the
assumption often made, the Coulomb-nuclear interference terms are found to be
non-negligible in case of exclusive cross sections of the fragments emitted in
this reaction on medium mass and heavy target nuclei. The consideration of the
nuclear breakup leads to a better description of such data.


title: Projected shell model study on nuclei near the N = Z line

abstract:
  Study of the N ~ Z nuclei in the mass-80 region is not only interesting due
to the existence of abundant nuclear structure phenomena, but also important in
understanding the nucleosynthesis in the rp-process. It is not feasible to
apply a conventional shell model due to the necessary involvement of the
g_{9/2} sub-shell. In this paper, the projected shell model is introduced to
this study. Calculations are systematically performed for the collective levels
as well as the quasi-particle excitations. It is demonstrated that calculations
with this truncation scheme can achieve a comparable quality as the large-scale
shell model diagonalizations for 48Cr, but the present method can be applied
for much heavier mass regions. While the known experimental data of the yrast
bands in the N ~ Z nuclei (from Se to Ru) are reasonably described, the present
calculations predict the existence of K-isomeric states, some of which lie low
in energy under certain structure conditions.


title: Comments on the nuclear symmetry energy

abstract:
  According to standard textbooks, the nuclear symmetry energy originates from
the {\it kinetic} energy and the {\it interaction} itself.
  We argue that this view requires certain modifications.
  We ascribe the physical origin of the {\it kinetic} term to the discreteness
of fermionic levels of, in principle arbitrary binary fermionic systems, and
relate its mean value directly to the average level density. Physically it
connects this part also to the isoscalar part of the interaction which, at
least in self-bound systems like atomic nuclei, decides upon the spatial
dimensions of the system. For the general case of binary fermionic systems
possible external confining potentials as well as specific boundary conditions
will contribute to this part. The reliability of this concept is tested using
self-consistent Skyrme Hartree-Fock calculations.


title:
Novel Phases at High Density and their Roles in the Structure and
  Evolution of Neutron Stars

abstract:
  We present a pedagogic discussion on the role of novel phases of dense
baryonic matter in ``neutron'' stars. Qualitative aspects of the physics that
drives phase transitions and some of its astrophysical consequences are
discussed. Observable aspects of neutron star structure and early evolution of
the newly born neutron star are discussed in some detail.


title: Compact stars with color superconducting quark matter

abstract:
  We study compact stars that contain quark matter. We look at the effect of
color superconductivity in the quark matter on the nuclear-quark matter
transition density, mass-radius relationship, and the density discontinuity at
the boundary between nuclear and quark matter. We find that color
superconducting quark matter will occur in compact stars at values of the bag
constant where ordinary quark matter would not be allowed. We are able to
construct ``hybrid'' stars with a color superconducting quark matter interior
and nuclear matter surface, with masses in the range 1.3-1.6 M_solar and radii
8-11 km. Our results are consistent with recent mass-radius limits based on
absorption lines from EXO0748-676.


title:
Transverse Momentum Spectra of Pions in Particle and Nuclear Collisions
  and Some Ratio-Behaviours: Towards A Combinational Approach

abstract:
  The nature of transverse momentum dependence of the inclusive cross-sections
for secondary pions produced in high energy hadronic($PP$), hadronuclear($PA$)
and nuclear($AA$) collisions has here been exhaustively investigated for a
varied range of interactions in a unified way with the help of a master
formula. This formula evolved from a new combination of the basic Hagedorn's
model for particle(pion) production in PP scattering at ISR range of energies,
a phenomenological approach proposed by Peitzmann for converting the results of
$NN(PP)$ reactions to those for either $PA$ or $AA$ collisions, and a specific
form of parametrization for mass number-dependence of the nuclear cross
sections. This grand combination of models(GCM) is then applied to analyse the
assorted extensive data on various high energy collisions. The nature of
qualitative agreement between measurements and calculations on both the
inclusive cross-sections for production of pions, and some ratios of them as
well, is quite satisfactory. The modest successes that we achieve here in
dealing with the massive data-sets are somewhat encouraging in view of the
diversity of the reactions and the very wide range of interaction energies.


title:
Skyrme Hartree-Fock Calculations for the Alpha Decay Q Values of
  Super-Heavy Nuclei

abstract:
  Hartree-Fock calculations with the SKX Skyrme interaction are carried out to
obtain alpha-decay Q values for deformed nuclei above $^{208}$Pb assuming axial
symmetry. The results for even-even nuclei are compared with experiment and
with previous calculations. Predictions are made for alpha-decay Q values and
half-lives of even-even super-heavy nuclei. The results are also compared for
the recently discovered odd-even chain starting at Z=112 and N=165.


title:
Macroscopic properties of nuclei according to the relativistic mean
  field theory

abstract:
  Self-consistent calculations within the relativistic mean field theory (RMFT)
were performed for 150 spherical even-even nuclei. The macroscopic part of the
binding energy was evaluated by subtracting the Strutinsky shell corrections
from the RMFT energy. The parameters of a liquid-drop (LD), like mass formula
which approximates the RMFT results, were determined. The mass and isospin
dependence of the RMFT mean-square radii constant for the neutron, proton,
charge and total density distributions were estimated. The RMFT liquid-drop
parameters and the radii constants are compared with similar results obtained
with the Hartree-Fock-Bogoliubov calculations with the Gogny force (HFB+Gogny)
and phenomenological models.


title: Collision damping in the pi 3He -> d'N reaction near the threshold

abstract:
  We present a simple quantum mechanical model exploiting the optical potential
approach for the description of collision damping in the reaction pi 3He -> d'N
near the threshold, which recently has been measured at TRIUMF. The influence
of the open d'N -> NNN channel is taken into account. It leads to a suppression
factor of about ten in the d' survival probability. Applications of the method
to other reactions are outlined.


title: Near-Threshold Photoproduction of eta-mesons on Three-Nucleon Nuclei

abstract:
  A microscopic few-body description of near-threshold coherent photoproduction
of the eta meson on tritium and 3He targets is given. The photoproduction
cross-section is calculated using the Finite Rank Approximation (FRA) of the
nuclear Hamiltonian. The results indicate a strong final state interaction of
the eta meson with the residual nucleus. Sensitivity of the results to the
choice of the eta N T-matrix is investigated.


title: Negative Kaons in Dense Baryonic Matter

abstract:
  Kaon polarization operator in dense baryonic matter of arbitrary isotopic
composition is calculated including s- and p-wave kaon-baryon interactions. The
regular part of the polarization operator is extracted from the realistic
kaon-nucleon interaction based on the chiral and 1/N_c expansion. Contributions
of the Lambda(1116), Sigma(1195), Sigma*(1385) resonances are taken explicitly
into account in the pole and regular terms with inclusion of mean-field
potentials. The baryon-baryon correlations are incorporated and fluctuation
contributions are estimated. Results are applied for K- in neutron star matter.
Within our model a second-order phase transition to the s-wave K- condensate
state occurs at $rho_c \gsim 4 \rho_0$ once the baryon-baryon correlations are
included. We show that the second-order phase transition to the p-wave $K^-$
condensate state may occur at densities $\rho_c \sim 3\div 5 \rho_0$ in
dependence on the parameter choice. We demonstrate that a first-order phase
transition to a proton-enriched (approximately isospin-symmetric) nucleon
matter with a p-wave K- condensate can occur at smaller densities, $\rho\lsim 2
\rho_0$. The transition is accompanied by the suppression of hyperon
concentrations.


title: Estimate of Contribution from P-D Mixing in Atomic PNC

abstract:
  We investigate possible contributions to future atomic parity nonconservation
(PNC) experiments from parity admixtures between single-electron atomic states
with total angular momentum $j = 3/2$. We develop new formalism for studying
these admixtures between atomic $p$ and $d$ states, which enter only when
finite nuclear size effects are considered and have been neglected in the
literature to date. We use analytic approximations to provide an
order-of-magnitude estimate of the contribution from these admixtures, and
identify a dimensionless ratio which sets the scale of the correction. Using
realistic numerical wavefunctions in \baplus we confirm the results of our
analytic expressions, and conclude quantitatively that these novel admixtures
are likely to be negligible in essentially all cases.


title:
pi and rho loop corrections to omega photoproduction in the resonance
  region

abstract:
  One-loop corrections due to the intermediate $\pi N$ and $\rho N$ states are
studied in $\omega$ photoproduction near threshold. Our results show that the
coupled-channel effects should be taken into account in extracting reliable
nucleon resonance parameters from the forthcoming vector meson photoproduction
data in the resonance region.


title: Electromagnetic form factors of bound nucleons revisited

abstract:
  We investigate the possible modifications of the nucleons' electromagnetic
form factors in the framework of a modified Skyrme model allowing for nucleon
deformation and using realistic nuclear mass distributions. We show that such
effects are small in light nuclei.


title: Statistical Properties of E(5) and X(5) Symmetries

abstract:
  We study the energy level statistics of the states in E(5) and X(5)
transitional dynamical symmetries. The calculated results indicate that the
statistics of E(5) symmetry is regular and follows Poisson statistics, while
the statistics of X(5) symmetry involves two maxima in the nearest neighbor
level spacing distribution $P(s)$ and the $\Delta_{3}$ statistics follows the
GOE statistics. It provides an evidence that the X(5) symmetry is at the
critical point exhibiting competing degree of freedom.


title: Q-boson interferometry and generalized Wigner function

abstract:
  Bose-Einstein correlations of two identically charged $Q$-bosons are derived
considering these particles to be confined in finite volumes. Boundary effects
on single $Q$-boson spectrum are also studied. We illustrate the effects on the
spectrum and on the two-$Q$-boson correlation function by means of two toy
models. We also derive a generalized expression for the Wigner function
depending on the deformation parameter $Q$, which is reduced to its original
functional form in the limit of $Q \to 1$.


title: Mott Effect and J/Psi Dissociation at the Quark-Hadron Phase Transition

abstract:
  We investigate the in-medium modification of pseudoscalar and vector mesons
in a QCD motivated chiral quark model by solving the Dyson-Schwinger equations
for quarks and mesons at finite temperature for a wide mass range of meson
masses, from light (pi, rho) to open-charm (D, D*) states. At the chiral /
deconfinement phase transition, the quark-antiquark bound states enter the
continuum of unbound states and become broad resonances (the hadronic Mott
effect). We calculate the in-medium cross sections for charmonium dissociation
due to collisions with light hadrons in a chiral Lagrangian approach, and show
that the D and D* meson spectral broadening lowers the threshold for charmonium
dissociation by pi and rho meson impact. This leads to a step-like enhancement
in the reaction rate. We suggest that this mechanism for enhanced charmonium
dissociation may be the physical mechanism underlying the anomalous J/Psi
suppression observed by NA50.


title:
The Isospin Distribution of Fragments in Reactions 96Ru+96Ru, 96Ru+96Zr,
  96Zr+96Ru, and 96Zr+96Zr at Beam Energy 400 AMeV

abstract:
  The isospin distribution of particles and fragments in collisions 96Ru+96Ru,
96Ru+96Zr, 96Zr+96Ru, and 96Zr+96Zr at beam energy 400 AMeV is studied with
isospin dependent QMD model. We find that the rapidity distribution of
differential neutron-proton counting in neutron rich nucleus-nucleus collisions
at intermediate energies is sensitive to the isospin dependent part of nuclear
potential. The study of the N/Z ratio of nucleons, light charged particles
(LCP) and intermediate mass fragments (IMF) shows that the isospin dependent
part of nuclear potential drives IMF to be more isospin symmetric and emitted
nucleons to be more neutron rich. From the study of the time evolution of the
isospin distribution in emitted nucleons, LCP and IMF we find that neutrons
diffuse much faster than protons at beginning and the final isospin
distribution is a result of dynamical balance of symmetry potential and Coulomb
force under the charge conservation.


title:
Isospin effect on nuclear stopping in intermediate energy Heavy Ion
  Collisions

abstract:
  By using the Isospin Dependent Quantum Molecular Dynamics Model (IQMD), we
study the dependence of nuclear stopping Q_{ZZ}/A and R in intermediate energy
heavy ion collisions on system size, initial N/Z, isospin symmetry potential
and the medium correction of two-body cross sections. We find the effect of
initial N/Z ratio, isospin symmetry potential on stopping is weak. The
excitation function of Q_{ZZ}/A and R depends on the form of medium correction
of two-body cross sections, the equation of state of nuclear matter (EOS). Our
results show the behavior of the excitation function of Q_{ZZ}/A and R can
provide clearer information of the isospin dependence of the medium correction
of two-body cross sections.


title:
Magnetic dipole moment of the S11(1535) from the \gamma p \to \gamma
  \eta p reaction

abstract:
  The \gamma p \to \gamma \eta p reaction in the S11(1535) resonance region is
investigated as a method to access the S11(1535) magnetic dipole moment. To
study the feasibility, we perform calculations of the \gamma p \to \gamma \eta
p process within an effective Lagrangian approach containing both the S11
resonant mechanism and a background of non-resonant contributions. Predictions
are made for the forthcoming experiments. In particular, we focus on the
sensitivity of cross sections and photon asymmetries to the S11(1535) magnetic
dipole moment.


title:
Comment on "Interaction induced deformation of the momentum distribution
  of spin polarized nuclear matter" by Frick, Muether, and Sedrakian

abstract:
  The paper does not take into account previous work where the effect they
discuss is explored in detail. It is known from this previous work that the
approach is incomplete.


title: Left-handed nuclei

abstract:
  The orientation of the angular momentum vector with respect to the triaxial
density distribution selects a left-handed or right-handed system principal
axes. This breaking of chiral symmetry manifests itself as pairs of nearly
identical $\Delta I=1$-bands. The chiral structures combine high-j particles
and high-j holes with a triaxial rotor. Tilted axis cranking calculations
predict the existence of such configurations in different mass regions. There
is experimental evidence in odd-odd nuclei around mass 134. The quantized
motion of the angular momentum vector between the left- and right-handed
configurations, which causes the splitting between the chiral sister bands, can
be classified as tunneling (chiral rotors) or oscillation (chiral vibrators).


title:
The Structure of Light Nuclei and Its Effect on Precise Atomic
  Measurements

abstract:
  This review consists of three parts: (a) what every atomic physicist needs to
know about the physics of light nuclei; (b) what nuclear physicists can do for
atomic physics; (c) what atomic physicists can do for nuclear physics. A brief
qualitative overview of the nuclear force and calculational techniques for
light nuclei will be presented, with an emphasis on debunking myths and on
recent progress in the field. Nuclear quantities that affect precise atomic
measurements will be discussed, together with their current theoretical and
experimental status. The final topic will be a discussion of those atomic
measurements that would be useful to nuclear physics, and nuclear calculations
that would improve our understanding of existing atomic data.


title:
Near-threshold $\omega$-meson production in proton-proton collisions:
  With or without resonance excitations ?

abstract:
  We present results for the $p p \to p p \omega$ reaction studied by
considering two different scenarios: with and without the inclusion of nucleon
resonance excitations. The recently measured angular distribution by the
COSY-TOF Collaboration at an excess energy of $Q = 173$ MeV and the energy
dependence of the total cross section data for $\pi^- p \to \omega n$ are used
to calibrate the model parameters. The inclusion of nucleon resonances improves
the theoretical prediction for the energy dependence of the total cross section
in $pp \to pp\omega$ at excess energies $Q < 31$ MeV. However, it still
underestimates the data by about a factor of two, and remains a problem in
understanding the reaction mechanism.


title:
Nuclear Shadowing and High-$p_T$ Hadron Spectra in Relativistic Heavy
  Ion Collisions

abstract:
  We explore how nuclear modifications to the nucleon parton distributions
affect production of high-$p_T$ hadrons in heavy ion collisions. We perform a
leading order calculation of the high-$p_T$ charged pion, kaon and proton
spectra using standard fragmentation functions and shadowing parameterizations.
We also consider alternate models of shadowing. Near midrapidity, shadowing is
a small effect and cannot explain the large observed suppression of high-$p_T$
hadrons. We also consider the isospin difference between protons and nuclei and
find that it is also a small effect on high-$p_T$ hadron production.


title:
Probing the strange quark condensate by di-electrons from phi meson
  decays in heavy-ion collisions at SIS energies

abstract:
  QCD sum rules predict that the change of the strange quark condensate $<\bar
s s>$ in hadron matter at finite baryon density causes a shift of the peak
position of the di-electron spectra from $\phi$ meson decays. Due to the
expansion of hadron matter in heavy-ion collisions, the $\phi$ peak suffers a
smearing governed by the interval of density in the expanding fireball, which
appears as effective broadening of the di-electron spectrum in the $\phi$
region. The emerging broadening is sensitive to the in-medium change of $<\bar
s s>$. This allows to probe directly in-medium modifications of $<\bar s s>$
via di-electron spectra in heavy-ion collisions at SIS energies with HADES.


title:
Shell Model Embedded in the Continuum for Binding Systematics in
  Neutron-Rich Isotopes of Oxygen and Fluor

abstract:
  Continuum coupling correction to binding energies in the neutron rich oxygen
and fluorine isotopes is studied using the Shell Model Embedded in the
Continuum. We discuss the importance of different effects, such as the position
of one-neutron emission threshold, the effective interaction or the number of
valence particles on the magnitude of this correction.


title: The Proton-Deuteron Break-Up Process in a Three-Dimensional Approach

abstract:
  The pd break-up amplitude in the Faddeev scheme is calculated by employing a
three-dimensional method without partial wave decomposition (PWD). In a first
step and in view of higher energies only the leading term is evaluated and this
for the process d(p,n)pp. A comparison with the results based on PWD reveals
discrepancies in the cross section around 200 MeV. This indicates the onset of
a limitation of the partial wave scheme. Also, around 200 MeV relativistic
effects are clearly visible and the use of relativistic kinematics shifts the
cross section peak to where the experimental peak is located. The theoretical
peak height, however, is wrong and calls first of all for the inclusion of
rescattering terms, which are shown to be important in a nonrelativistic full
Faddeev calculation in PWD.


title: To bind or not to bind: Lambda-Lambda hypernuclei and Xi hyperons

abstract:
  Four-body Faddeev-Yakubovsky calculations for Lambda-Lambda-p-n do not
produce a bound state for Lambda-Lambda hydrogen 4, although suitably defined
three-body Faddeev calculations for Lambda-Lambda-d produce a 1+ bound state
for Lambda-Lambda interactions fitted to the Lambda-Lambda helium 6 emulsion
event from KEK E373. This is opposite to the normal situation where a four-body
Faddeev-Yakubovsky calculation yields stronger binding than that due to a
suitably defined three-body Faddeev calculation. For stranger systems, Faddeev
calculations using Lambda-Xi interactions which simulate the Nijmegen soft-core
model NSC97 (which is close to reproducing the KEK event) suggest that
Lambda-Xi helium 6 marks the onset of nuclear stability for Xi hyperons.


title: Three-Body Dynamics in One Dimension

abstract:
  We discuss the general three-particle quantum scattering problem, for motion
restricted to the full line. Specifically, we formulate the three-body problem
in one dimension in terms of the (Faddeev-type) integral equation approach. As
a first application, we develop a spinless, one-dimensional (1-D) model that
mimics three-nucleon dynamics in one dimension. In addition, we investigate the
effects of pionic 3NF diagrams.


title:
Screening enhancement factors for laboratory CNO and rp astrophysical
  reactions

abstract:
  Cross sections of laboratory CNO and rp astrophysical reactions are enhanced
due to the presence of the multi-electron cloud that surrounds the target
nuclei. As a result the relevant astrophysical factors are overestimated unless
corrected appropriately. This study gives both an estimate of the error
committed if screening effects are not taken into account and a rough profile
of the laboratory energy thresholds at which the screening effect appears. The
results indicate that, for most practical purposes, screening corrections to
past relevant experiments can be disregarded. Regarding future experiments,
however, screening corrections to the CNO reactions will certainly be of
importance as they are closely related to the solar neutrino fluxes and the rp
process. Moreover, according to the present results, screening effects will
have to be taken into account particularly by the current and future LUNA
experiments, where screened astrophysical factors will be enhanced to a
significant degree.


title: A National Underground Science Laboratory in the U.S

abstract:
  Recent developments in underground science are reviewed. Recent efforts to
built a deep multi-purpose underground laboratory in the U.S. to explore a wide
range of science are summarized.


title:
Microscopic description of the scissors mode in odd-mass heavy deformed
  nuclei

abstract:
  Pseudo-SU(3) shell-model results are reported for M1 excitation strengths in
157-Gd, 163-Dy and 169-Tm in the energy range between 2 and 4 MeV. Non-zero
pseudo-spin couplings between the configurations play a very important role in
determining the M1 strength distribution, especially its rapidly changing
fragmentation pattern which differs significantly from what has been found in
neighboring even-even systems. The results suggest one should examine
contributions from intruder levels.


title: Critical frequency in nuclear chiral rotation

abstract:
  Within the cranked Skyrme-Hartree-Fock approach the self-consistent solutions
have been obtained for planar and chiral rotational bands in 132La. It turns
out that the chiral band cannot exist below some critical rotational frequency
which in the present case equals omega=0.6MeV. The appearance of the critical
frequency is explained in terms of a simple classical model of two gyroscopes
coupled to a triaxial rigid body.


title:
Exclusive charge exchange reaction pD->n(pp) within the Bethe-Salpeter
  formalism

abstract:
  The exclusive charge exchange reaction pD->n(pp) at intermediate and high
energies is studied within the Bethe-Salpeter formalism. The final state
interaction in the detected pp pair at nearly zero excitation energy is
described by the 1S0 component of the Bethe-Salpeter amplitude. Results of
numerical calculations of polarization observables and differential
cross-section persuade that, as in the non-relativistic case, this reaction (i)
can be utilized as a ``relativistic deuteron polarimeter'' and (ii) delivers
further information about the elementary nucleon-nucleon charge-exchange
amplitude.


title: Unitarized chiral perturbation theory of hadrons

abstract:
  An exposition is made of recent developments using techniques of unitary
chiral perturbation theory, $U \chi P T$, which allows one to extend
predictions using chiral Lagrangians to higher energies than ordinary chiral
perturbation theory, including the region of low lying mesonic and baryonic
resonances, some of which are dynamically generated in the approach. Results
for meson meson scattering, pion and kaon form factors and meson baryon
scattering are shown. Applications are done for nuclear problems showing the
results for the kaon and eta selfenergies, phi renormalization in a nuclear
medium and $\sigma$ renormalization in the medium, comparing results with
recent experiments.


title: Baryon Resonance Dynamics in pi N \to N V Reactions Near Threshold

abstract:
  The rho - omega interference in the exclusive reaction pi N \to N' e+ e- is
studied within a schematic model including the established baryon resonances up
to 1720 MeV. Near threshold the interference can be used to separate the
isoscalar part of the electromagnetic current. The role of various baryon
resonances is highlighted.


title: Tests of the random phase approximation for transition strengths

abstract:
  We investigate the reliability of transition strengths computed in the
random-phase approximation (RPA), comparing with exact results from
diagonalization in full $0\hbar\omega$ shell-model spaces. The RPA and
shell-model results are in reasonable agreement for most transitions; however
some very low-lying collective transitions, such as isoscalar quadrupole, are
in serious disagreement. We suggest the failure lies with incomplete
restoration of broken symmetries in the RPA. Furthermore we prove, analytically
and numerically, that standard statements regarding the energy-weighted sum
rule in the RPA do not hold if an exact symmetry is broken.


title:
Influence of tunneling on electron screening in low energy nuclear
  reactions in laboratories

abstract:
  Using a semiclassical mean field theory, we show that the screening potential
exhibits a characteristic radial variation in the tunneling region in sharp
contrast to the assumption of the constant shift in all previous works. Also,
we show that the explicit treatment of the tunneling region gives a larger
screening energy than that in the conventional approach, which studies the time
evolution only in the classical region and estimates the screening energy from
the screening potential at the external classical turning point. This
modification becomes important if the electronic state is not a single
adiabatic state at the external turning point either by pre-tunneling
transitions of the electronic state or by the symmetry of the system even if
there is no essential change with the electronic state in the tunneling region.


title: Microscopic foundations of nuclear supersymmetry

abstract:
  We discuss a microscopic framework for phenomenological boson-fermion models
of nuclear structure based on the U($n/m$) type of superalgebras. The
generalized Dyson mapping of fermion collective superalgebras provides a basis
to do so and to understand how collectivity selects the required preservation
of boson plus fermion number as a good quantum number. We also consider the
difference between dynamical and invariant supersymmetries based on possible
supermultiplets of spectra of neighboring odd and even nuclei. We point out
that different criteria exist for choosing the appropriate single particle
transfer operators in the two cases and discuss a microscopically based method
to construct these operators in the case of dynamical supersymmetry.


title: Stochastic Variational Search for $^{4}_{\Lambda\Lambda}$H

abstract:
  A four-body calculation of the $pn\Lambda\Lambda$ bound state, $^{\
4}_{\Lambda\Lambda}$H, is performed using the stochastic variational method and
phenomenological potentials. The $NN$, $\Lambda N$, and $\Lambda\Lambda$
potentials are taken from a recent Letter by Filikhin and Gal, PRL{\bf 89},
172502 (2002). Although their Faddeev-Yakubovsky calculation found no
bound-state solution over a wide range of $\Lambda\Lambda$ interaction
strengths, the present variational calculation gives a bound-state energy,
which is clearly lower than the $_\Lambda^3{H}+\Lambda$ threshold, even for a
weak $\Lambda\Lambda$ interaction strength deduced from a recent experimental
$B_{\Lambda\Lambda}(^{6}_{\Lambda\Lambda}{He})$ value. The binding energies
obtained are close to, and slightly larger than, the values obtained from the
three-body $d\Lambda\Lambda$ model in the Letter.


title: Important experimental observables at RHIC

abstract:
  In this talk I discuss the significance of the first RHIC measurements for
establishing the properties of hot and dense QCD matter and for understanding
the dynamics of the theory at the high parton density, strong color field
frontier. Hopes and expectations for the future are discussed as well.


title: Prompt Photon and Inclusive $\pi^0$ Production at RHIC and LHC

abstract:
  We present results for prompt photon and inclusive $\pi^0$ production in p-p
and A-A collisions at RHIC and LHC energies. We include the full
next-to-leading order radiative corrections and nuclear effects, such as
nuclear shadowing and parton energy loss. We find the next-to-leading order
corrections to be large and $p_T$ dependent. We show how measurements of
$\pi^0$ production at RHIC and LHC, at large $p_T$, can provide valuable
information about the nature of parton energy loss.
  We calculate the ratio of prompt photons to neutral pions and show that at
RHIC energies this ratio increases with $p_T$ approaching one at $p_T \sim 10$
GeV, due to the large suppression of $\pi^0$ production. We show that at the
LHC, this ratio has steep $p_T$ dependence and approaches 10% effect at $p_T
\sim 20$ GeV.


title: Medium effects to the N(1535) resonance and eta mesic nuclei

abstract:
  The structure of eta-nucleus bound systems (eta mesic nuclei) is investigated
as one of the tools to study in-medium properties of the N(1535) (N*)
resonance. We show that, as a general consequence, the eta-nucleus potential
has a repulsive core at the nuclear center with an attractive part at the
nuclear surface, if sufficient reduction of the mass difference of N and N*
stems from the in-medium effects to N*. The (d,3He) spectra are evaluated for
the formation of these bound states to investigate the experimental
feasibility.


title: Structure functions and parton distributions

abstract:
  In this talk, I review the status of theoretical understanding of nuclear
structure functions and parton distributions and discuss the constraints on
nuclear parton distributions from existing data and the global QCD analysis.


title: The s-wave repulsion and deeply bound pionic atoms: fact and fancy

abstract:
  Fits to a large data set of pionic atoms show that the `missing' s-wave
repulsion is accounted for when a density dependence suggested recently by
Weise is included in the isovector term of the s-wave pion optical potential.
The importance of using large data sets is demonstrated and the role of deeply
bound pionic atom states is discussed.


title: Covariant kaon dynamics and kaon flow in heavy ion collisions

abstract:
  The influence of the chiral mean field on the $K^+$ transverse flow in heavy
ion collisions at SIS energy is investigated within covariant kaon dynamics.
For the kaon mesons inside the nuclear medium a quasi-particle picture
including scalar and vector fields is adopted and compared to the standard
treatment with a static potential. It is confirmed that a Lorentz force from
spatial component of the vector field provides an important contribution to the
in-medium kaon dynamics and strongly counterbalances the influence of the
vector potential on the $K^+$ in-plane flow. The FOPI data can be reasonably
described using in-medium kaon potentials based on effective chiral models. The
information on the in-medium $K^+$ potential extracted from kaon flow is
consistent with the knowledge from other sources.


title: Iterated Resolvent Function for the Ladder Bethe-Salpeter Equation

abstract:
  We developed the formal connection of the field theoretical Bethe-Salpeter
equation including the ladder approximation with its representation on the
light-front for a bosonic model. We use the light-front Green's function for
the N-particle system for two-particles plus N-2 intermediate bosons. We
derived an infinite set of coupled hierarchy equations or iterated resolvent
from which the Green's function can be calculated. These equations allow a
consistent truncation of the light-front Fock-space. We show explicitly the
represention of the covariant two-body T-matrix and bound state vertex in the
light-front.


title: Chiral dynamics and pionic 1s states of Pb and Sn isotopes

abstract:
  We calculate shifts and width of 1s and 2p states of pions bound to heavy
nuclei, using an optical potential with its s-wave interaction part based on
chiral symmetry. This potential is constructed systematically in two-loop
approximation of chiral perturbation theory. A proper treatment of the explicit
energy dependence of this potential in conjunction with gauge invariance turns
out to be very important. Results are reported for deeply bound pionic states
in Pb and Sn isotopes in comparison with the GSI data


title:
Consequences of kinetic non-equilibrium for the nuclear
  equation-of-state in heavy ion collision

abstract:
  Highly compressed nuclear matter created in relativistic heavy collisions is
to large extent governed by local non-equilibrium. As an idealized scenario
colliding nuclear matter configurations are studied within both, relativistic
mean field theory and using more realistic in-medium interactions based on the
Dirac-Brueckner T-matrix. The equation of state in anisotropic matter is
thereby governed by two competing effects: The enlarged phase space volume in
colliding matter tends to soften the internal potential energy of the
subsystems whereas the relative motion of the two currents leads to a strong
additional repulsion in the system. An effective EOS constructed for
anisotropic momentum configurations shows a significant net softening compared
to ground state nuclear matter. This effect is found to be to large extend
independent on the particular choice of the nuclear interaction. A critical
discussion of standard transport approaches with respect to the considered
non-equilibrium effects is given.


title: Progress in the determination of the $J/\psi-\pi$ cross section

abstract:
  Improving previous calculations, we compute the $J/\psi \pi\to {charmed
mesons}$ cross section using QCD sum rules. Our sum rules for the $J/\psi
\pi\to \bar{D} D^*$, $D \bar{D}^*$, ${\bar D}^* D^*$ and ${\bar D} D$ hadronic
matrix elements are constructed by using vaccum-pion correlation functions, and
we work up to twist-4 in the soft-pion limit. Our results suggest that, using
meson exchange models is perfectly acceptable, provided that they include form
factors and that they respect chiral symmetry. After doing a thermal average we
get $<\sigma^{\pi J/\psi} v>\sim 0.3$ mb at $T=150\MeV$.


title: Isospin in fragment production

abstract:
  Based on a general approach to binary systems we show that in the low density
region asymmetric nuclear matter (ANM) is unstable only against isoscalarlike
fluctuations. The physical meaning of the thermodynamical chemical and
mechanical instabilities is related to the inequality relations verified by the
strength of interaction among different components. Relevance of these results
in bulk and neck fragmentation is discussed.


title: Dissipation near the QCD phase transition

abstract:
  We set up a framework for field theoretical studies of systems out of thermal
equilibrium and zoom in on the dissipation of disoriented chiral condensates.
Short relaxation times are obtained in the phase transition region,
jeopardizing the definiteness of a DCC signal.


title: Nuclear Anapole Moments and the Parity-nonconserving Nuclear Interaction

abstract:
  The anapole moment is a parity-odd and time-reversal-even electromagnetic
moment. Although it was conjectured shortly after the discovery of parity
nonconservation, its existence has not been confirmed until recently in heavy
nuclear systems, which are known to be the suitable laboratories because of the
many-body enhancement. By carefully identifying the nuclear-spin-dependent
atomic parity nonconserving effect, the first clear evidence was found in
cesium. In this talk, I will discuss how nuclear anapole moments are used to
constrain the parity-nonconserving nuclear force, a still less well-known
channel among weak interactions.


title: Energy loss of partons traversing a QGP fluid

abstract:
  We analyse the azimuthal correlation function for high p_T charged hadrons in
Au+Au collisions at the RHIC energy. By using a dynamical model in which
hydrodynamics is combined with explicit propagation of high p_T partons, we
study the effect of the intrinsic transverse momentum of initial partons on the
azimuthal back-to-back correlations.


title: In medium sigma meson effects in two pion photoproduction in nuclei

abstract:
  We show theoretical results for $(\gamma, \pi^0 \pi^0)$ production on
nucleons and nuclei in the kinematical region where the scalar isoscalar $\pi
\pi$ amplitude is influenced by the $\sigma$ pole. The final state interaction
of the pions modified by the nuclear medium produces a spectacular shift of
strength of the two pion invariant mass distribution induced by the moving of
the $\sigma$ pole to lower masses and widths as the nuclear density increases.


title: Meson-Baryon Interactions in Unitarized Chiral Perturbation Theory

abstract:
  Meson-Baryon Interactions can be successfully described using both Chiral
Symmetry and Unitarity. The $s-$wave meson-baryon scattering amplitude is
analyzed in a Bethe-Salpeter coupled channel formalism incorporating Chiral
Symmetry in the potential. Two body coupled channel unitarity is exactly
preserved. The needed two particle irreducible matrix amplitude is taken from
lowest order Chiral Perturbation Theory in a relativistic formalism. Off-shell
behavior is parameterized in terms of low energy constants. The relation to the
heavy baryon limit is discussed. The position of the complex poles in the
second Riemann sheet of the scattering amplitude determine masses and widths
baryonic resonances of the N(1535), N(1670), $\Lambda (1405)$ and
$\Lambda(1670)$ resonances which compare well with accepted numbers.


title: Production Mechanism for Quark Gluon Plasma in Heavy Ion Collisions

abstract:
  A general scheme is proposed here to describe the production of semi soft and
soft quarks and gluons that form the bulk of the plasma in ultra relativistic
heavy ion collisions. We show how to obtain rates as a function of time in a
self consistent manner, without any ad-hoc assumption. All the required
features - the dynamical nature of QCD vacuum, the non-Markovian nature of the
production, and quasi particle nature of the partons, and the importance of
quantum interference effects are naturally incorporated. We illustrate the
results with a realistic albeit toy model and show how almost all the currently
employed source terms are unreliable in their predictions. We show the rates in
the momentum space and indicate at the end how to extract the full phase-space
dependence.