title: Regularity and chaos in the nuclear masses

abstract:
  Shell effects in atomic nuclei are a quantum mechanical manifestation of the
single--particle motion of the nucleons. They are directly related to the
structure and fluctuations of the single--particle spectrum. Our understanding
of these fluctuations and of their connections with the regular or chaotic
nature of the nucleonic motion has greatly increased in the last decades. In
the first part of these lectures these advances, based on random matrix
theories and semiclassical methods, are briefly reviewed. Their consequences on
the thermodynamic properties of Fermi gases and, in particular, on the masses
of atomic nuclei are then presented. The structure and importance of shell
effects in the nuclear masses with regular and chaotic nucleonic motion are
analyzed theoretically, and the results are compared to experimental data. We
clearly display experimental evidence of both types of motion


title:
Three-body electrodisintegration of the three-nucleon bound state with
  ${\Delta}$-isobar excitation: Processes below pion-production threshold

abstract:
  Electron scattering from the three-nucleon bound state with two- and
three-body disintegration is described. The description uses the purely
nucleonic charge-dependent CD-Bonn potential and its coupled-channel extension
CD-Bonn + $\Delta$.
  Exact solutions of three-particle equations are employed for the initial and
final states of the reactions. The current has one-baryon and two-baryon
contributions and couples nucleonic with $\Delta$-isobar channels.
$\Delta$-isobar effects on the observables are isolated. The $\Delta$-isobar
excitation yields an effective three-nucleon force and effective two- and
three-nucleon currents beside other $\Delta$-isobar effects; they are mutually
consistent.


title: Parton coalescence and spacetime

abstract:
  The influence of spacetime dynamics in hadronization via parton coalescence
at RHIC is investigated using covariant parton transport theory. Key
observables, the quark number scaling of elliptic flow and the enhancement of
the p/pi ratio, show strong dynamical effects and differ from earlier results
based on the simple coalescence formulas.


title: Pion Source in Au+Au Collisions at $\sqrt(S_NN)$=130 GeV

abstract:
  The modified model emission function S(x,p), with a uniform radial expansion
mode and mass reduction, is used to study the single particle spectra and two
particle correlation of pions. The calculated HBT radii and one particle
spectra are compared with the data from $\sqrt(S_NN)$=130 GeV Au+Au collisions
at the Relativistic Heavy Ion Collider (RHIC). We see the main features of the
data are reproduced, Ro/Rs decreases with increasing Kt and we have a kinetic
freeze out temperature T=150 MeV.


title:
Effective-range approach and scaling laws for electromagnetic strength
  in neutron-halo nuclei

abstract:
  We study low-lying multipole strength in neutron-halo nuclei. The strength
depends only on a few low-energy constants: the neutron separation energy, the
asymptotic normalization coefficient of the bound state wave function, and the
scattering length that contains the information on the interaction in the
continuum. The shape of the transition probability shows a characteristic
dependence on few scaling parameters and the angular momenta. The total E1
strength is related to the root-mean-square radius of the neutron wave function
in the ground state and shows corresponding scaling properties. We apply our
approach to the E1 strength distribution of 11Be.


title:
Three-pair final-state interaction in the pp->pp\eta reaction close to
  threshold

abstract:
  We present a three-body formalism describing final-state interaction effects.
The three-body enhancement factor is derived by expanding the complete
three-particle wave function in hyperspherical harmonics.


title: Relativistic description of the np to eta d reaction near threshold

abstract:
  Relativistic effects in a three-body calculation of the $np\to\eta d$ process
are considered. Relativistic effects on the range and strength of the pion
exchange contribution to the reaction mechanism may be large, but boost effects
of the two-body interactions are negligible. The relativistic calculation
confirms previous non-relativistic results, showing that the shape of the cross
section near threshold is essentially determined by the $\eta d$ final-state
interaction alone. As for the region away from threshold, the relativistic pion
exchange contribution is seen to dominate the other mechanisms of the reaction.
It turns out that, within the relativistic reaction model, the $np\to\eta d$
experimental data excludes large values for the real part of the $\eta N$
scattering length.


title: FaCE: a tool for Three Body Faddeev calculations with core excitation

abstract:
  FaCE is a self contained programme, with namelist input, that solves the
three body Faddeev equations. It enables the inclusion of excitation of one of
the three bodies, whilst the other two remain inert. It is particularly useful
for obtaining the binding energies and bound state structure compositions of
light exotic nuclei treated as three-body systems, given the three effective
two body interactions. A large variety of forms for these interactions may be
defined, and supersymmetric transformations of these potentials may be
calculated whenever two body states need to be removed due to Pauli blocking.


title: Production of phi and Omega at RHIC in the Recombination Model

abstract:
  The recombination model is applied to the production of phi and Omega at all
pt in central Au+Au collisions. Since no light quarks are involved in the
hadronization, those hidden-strange particles present a clean slate for the
study of the role of strange quarks in large-pt physics. We find that shower s
quarks have negligible effect for pt<6 GeV/c, in which range the thermal s
quarks make the dominant contributions to the formation of phi and Omega. We
show that the same effective temperature of the s quarks is responsible for the
shape of the spectra of both phi and Omega. We predict that the ratio of Omega
to phi will show a peak at pt \approx 6 GeV/c due to the effect of the hard
partons. We also give reasons on the basis of the pt dependence that phi cannot
be formed by means of K+K- coalescence.


title: Grand Canonical Model Predictions For Nuclear Fragmentation

abstract:
  The grand canonical ensemble has been used to make predictions for composite
yields using simple models for nuclear fragmentation. While this gives correct
model prediction for high energy collisions, it can give very inaccurate
results at intermediate energy.


title: Cronin Effect and High Transver Momentum Suppression in D+Au Collisions

abstract:
  Great interest has attached to recent D+Au, s^(1/2) = 200 A GeV data at RHIC,
obtained with the BRAHMS detector. Between pseudorapidity eta=0 and eta=3.2 the
appropriately defined ratio R[DAu/PP], comparing transverse momentum spectra of
D+Au to P+P exhibits a steady decrease with eta. This diminuition is examined
within a two-stage simulation, the last stage being a purely hadronic, reduced
energy cascade. The result is an adequate description of the data including the
so-called Cronin effect. Additionally there is clear evidence for suppression,
in the second stage, of relatively high transverse momentum, eta=0, leading
mesons, i.e. the Cronin effect, only near mid-rapidity, is appreciably muted by
final state interactions.


title:
Axially Deformed Solution of the Skyrme-Hartree-Fock-Bogolyubov
  Equations using The Transformed Harmonic Oscillator Basis. The program HFBTHO
  (v1.66p)

abstract:
  We describe the program HFBTHO for axially deformed configurational
Hartree-Fock-Bogoliubov calculations with Skyrme-forces and zero-range pairing
interaction using Harmonic-Oscillator and/or Transformed Harmonic-Oscillator
states. The particle-number symmetry is approximately restored using the
Lipkin-Nogami prescription, followed by an exact particle number projection
after the variation. The program can be used in a variety of applications,
including systematic studies of wide ranges of nuclei, both spherical and
axially deformed, extending all the way out to nucleon drip lines.


title: Dipole states in stable and unstable nuclei

abstract:
  A nuclear structure model based on linear response theory (i.e., Random Phase
Approximation) and which includes pairing correlations and anharmonicities
(coupling with collective vibrations), has been implemented in such a way that
it can be applied on the same footing to magic as well as open-shell nuclei. As
applications, we have chosen to study the dipole excitations both in
well-known, stable isotopes like $^{208}$Pb and $^{120}$Sn as well as in the
neutron-rich, unstable $^{132}$Sn nucleus, by addressing in the latter case the
question about the nature of the low-lying strength. Our results suggest that
the model is reliable and predicts in all cases low-lying strength of non
collective nature.


title:
Combined Analysis of Near-Threshold Production of omega and phi Mesons
  in Nucleon-Nucleon Collisions within an Effective Meson-Nucleon Model

abstract:
  Vector meson ($V = \omega, \phi$) production in near-threshold elementary
nucleon-nucleon collisions $pp\to ppV$, $pn\to pnV$ and $pn\to dV$ is studied
within an effective meson-nucleon theory. It is shown that a set of effective
parameters can be established to describe fairly well the available
experimental data of angular distributions and the energy dependence of the
total cross sections without explicit implementation of the Okubo-Zweig-Iisuka
rule violation. Isospin effects are considered in detail and compared with
experimental data whenever available.


title:
Identifying neutrinos and antineutrinos in neutral-current scattering
  reactions

abstract:
  We study neutrino-induced nucleon knockout from nuclei. Expressions for the
induced polarization are derived within the framework of the
independent-nucleon model and the non-relativistic plane-wave approximation.
Large dissimilarities in the nucleon polarization asymmetries are observed
between neutrino- and antineutrino-induced processes. These asymmetries
represent a potential way to distinguish between neutrinos and antineutrinos in
neutral-current neutrino-scattering on nuclei. We discuss astrophysical
applications of these polarization asymmetries. Our findings are illustrated
for neutrino scattering on $^{16}$O and $^{208}$Pb.


title: Application of wavelets to singular integral scattering equations

abstract:
  The use of orthonormal wavelet basis functions for solving singular integral
scattering equations is investigated. It is shown that these basis functions
lead to sparse matrix equations which can be solved by iterative techniques.
The scaling properties of wavelets are used to derive an efficient method for
evaluating the singular integrals. The accuracy and efficiency of the wavelet
transforms is demonstrated by solving the two-body T-matrix equation without
partial wave projection. The resulting matrix equation which is characteristic
of multiparticle integral scattering equations is found to provide an efficient
method for obtaining accurate approximate solutions to the integral equation.
These results indicate that wavelet transforms may provide a useful tool for
studying few-body systems.


title: Ab initio calculation of Li7 photodisintegration

abstract:
  The Li7 total photoabsorption cross section is calculated microscopically. As
nucleon-nucleon interaction the semi-realistic central AV4' potential with S-
and P-wave forces is taken. The interaction of the final 7-nucleon system is
fully taken into account via the Lorentz Integral Transform (LIT) method. For
the calculation of the LIT we use expansions in hyperspherical harmonics (HH)
in conjunction with the HH effective interaction (EIHH) approach. The
convergence of the LIT expansion is discussed in detail. The calculated cross
section agrees quite well with the available experimental data, which cover an
energy range from threshold up to 100 MeV.


title:
From Solar Proton Burning to Pionic Deuterium through the
  Nambu-Jona-Lasinio model of light nuclei

abstract:
  Within the Nambu-Jona-Lasinio model of light nuclei (the NNJL model),
describing strong low-energy nuclear interactions, we compute the width of the
energy level of the ground state of pionic deuterium. The theoretical value
fits well the experimental data. Using the cross sections for the reactions
nu_e + d -> p + p + e^- and nu_e + d -> p + n + nu_e, computed in the NNJL
model, and the experimental values of the events of these reactions, detected
by the SNO Collaboration, we compute the boron neutrino fluxes. The theoretical
values agree well with the experimental data and the theoretical predictions
within the Standard Solar Model by Bahcall. We argue the applicability of the
constraints on the astrophysical factor for the solar proton burning, imposed
by helioseismology, to the width of the energy level of the ground state of
pionic deuterium. We show that the experimental data on the width satisfy these
constraints. This testifies an indirect measurement of the recommended value of
the astrophysical factor for the solar proton burning in terrestrial
laboratories in terms of the width of the energy level of the ground state of
pionic deuterium.


title:
Dependence of Nuclear Binding Energies on the Cutoff Momentum of
  Low-Momentum Nucleon-Nucleon Interaction

abstract:
  Binding energies of ^{3}H, ^{4}He, and ^{16}O are calculated, using
low-momentum nucleon-nucleon interactions (V_{low-k}) for a wide range of the
cutoff momentum \Lambda. In addition, single-particle energies in nuclei around
^{16}O are computed. The dependence of the binding energies and the
single-particle energies in these nuclei on the cutoff momentum \Lambda of the
V_{low-k} is examined. Furthermore, the availability of the V_{low-k} in
nuclear structure calculations is discussed.


title:
Folding model analysis of proton scattering from mirror nuclei $^{18}$Ne
  and $^{18}$O

abstract:
  The elastic and inelastic scattering of protons from mirror nuclei $^{18}$Ne
and $^{18}$O are studied in a folding model approach. For comparison, two
different effective interactions are folded with Hartree-Fock densities to
obtain the nuclear interaction potentials. Both of them provide equivalent
descriptions to the data and the deformation parameters extracted from
inelastic scattering are reasonable. The density dependence parameters obtained
from nuclear matter calculations and used for present analysis also provide a
good estimate for the nuclear mean free path. The present formalism unifies
radioactivity, nuclear matter and nuclear scattering.


title: Structure of particle-hole nuclei around 100Sn

abstract:
  We have performed shell-model calculations for the three odd-odd nuclei
100In, 102In, and 98Ag, with neutron particles and proton holes around 100Sn.
We have used a realistic effective interaction derived from the CD-Bonn
nucleon-nucleon potential, the neutron-proton channel being explicitly treated
in the particle-hole formalism. Particular attention has been focused on the
particle-hole multiplets, which are a direct source of information on the
neutron-proton effective interaction. We present our predictions for the two
lowest lying multiplets in 100In, for which no spectroscopic data are yet
available. For 98Ag and 102In comparison shows that our results are in very
good agreement with the available experimental data.


title: Nuclear Structure Calculations and Modern Nucleon-Nucleon Potentials

abstract:
  We study ground-state properties of the doubly magic nuclei 4He, 16O, and
40Ca employing the Goldstone expansion and using as input four different
high-quality nucleon-nucleon (NN) potentials. The short-range repulsion of
these potentials is renormalized by constructing a smooth low-momentum
potential V-low-k. This is used directly in a Hartree-Fock approach and
corrections up to third order in the Goldstone expansion are evaluated.
Comparison of the results shows that they are only slightly dependent on the
choice of the NN potential.


title:
Effective meson masses, effective meson-nucleon couplings and neutron
  star radii

abstract:
  Using the generalized mean field theory, we have studied the relation among
the effective meson masses, the effective meson-nucleon couplings and the
equation of state (EOS) in asymmetric nuclear matter. If the effective
omega-meson mass becomes smaller at high density, the EOS becomes stiffer.
However, if we require that the omega-meson mean field is proportional to the
baryon density, the effective omega-nucleon coupling automatically becomes
smaller at the same time as the effective omega-meson mass becomes smaller.
Consequently, the EOS becomes softer. A similar relation is found for the
effective rho-meson mass and the effective rho-nucleon coupling. We have also
studied the relation among the effective meson masses, the effective
meson-nucleon couplings and a radius R of a neutron star. The R depends
somewhat on the value of the effective omega-meson mass and the effective
omega-nucleon coupling.


title: Light-Front Dynamics and Generalized Parton Distributions

abstract:
  In this work we report on using light-front dynamics to describe generalized
parton distributions, which are correlation functions encountered in virtual
Compton scattering at large momentum transfer. This two photon process requires
pair annihilation contributions which are subtle to handle in light-front
dynamics. We are careful to derive such contributions in the light-front
Bethe-Salpeter formalism. This derivation highlights the connection to the Fock
space picture as well as provides a toy model for generalized parton
distributions.Ultimately we use light-front dynamics to build a
phenomenological parametrization for the proton's generalized parton
distributions. This task is non-trivial due to the field theoretic constraints
required of these distributions. To meet the constraints imposed by Lorentz
covariance, we approach generalized parton distributions from the perspective
of double distributions. Despite avid phenomenological use, surprisingly little
work has been done to calculate double distributions. We first focus on a
number of simple pedagogical examples and demonstrate how double distributions
can be correctly determined. The double distributions we derive, including
those for the proton, satisfy known constraints and are adequate for
phenomenological estimates of cross sections. The models used allow one to
study the interplay between the light-front formulation and Lorentz covariance.


title: An Exactly Solvable Model of Interacting Bosons

abstract:
  We introduce a class of exactly solvable boson models. We give explicit
analytic expressions for energy eigenvalues and eigenvectors for an sd-boson
Hamiltonian, which is related to the SO(6) chain of the Interacting Boson Model
Hamiltonian.


title: $\Theta^+$ Hypernuclei

abstract:
  We present results for the selfenergy of the $\Theta^+$ pentaquark in nuclei
associated with two sources: the $KN$ decay of the $\Theta^+$ and the two meson
baryon decay channels of the $\Theta^+$ partners in an antidecuplet of baryons.
The first source is shown to produce a small potential, unable to bind the
$\Theta^+$ in nuclei, while the second source gives rise to a large attractive
potential. At the same time we show that the width of the $\Theta^+$ in nuclei
is small, such that, in light and medium nuclei, many bound $\Theta^+$ states
would appear with a separation between levels appreciably larger than the width
of the states, thus creating an ideal scenario for pentaquark spectroscopy in
nuclei.


title:
Order parameter fluctuations in percolation: Application to nuclear
  multifragmentation

abstract:
  Order parameter fluctuations (the largest cluster size distribution) are
studied within a three-dimensional bond percolation model on small lattices.
Cumulant ratios measuring the fluctuations exhibit distinct features near the
percolation transition (pseudocritical point), providing a method for its
identification. The location of the critical point in the continuous limit can
be estimated without variation of the system size. This method is remarkably
insensitive to finite-size effects and may be applied even for a very small
system. The possibility of using various measurable quantities for sorting
events makes the procedure useful in studying clusterization phenomena, in
particular nuclear multifragmentation. Finite-size scaling and delta-scaling
relations are examined. The model shows inconsistency with some of the
delta-scaling expectations. The role of surface effects is evaluated by
comparing results for free and periodic boundary conditions.


title:
Covariant baryon charge radii and magnetic moments in a chiral
  constituent quark model

abstract:
  The charge radii and magnetic moments of all the light and strange baryons
are investigated within the framework of a constituent quark model based on
Goldstone-boson-exchange dynamics. Following the point-form approach to
relativistic quantum mechanics, the calculations are performed in a manifestly
covariant manner. Relativistic (boost) effects have a sizeable influence on the
results. The direct predictions of the constituent quark model are found to
fall remarkably close to the available experimental data.


title:
How relativistic heavy ion collisions can help us understand the
  universe

abstract:
  We discuss the anthropic principle and its implications for our existence and
the physical laws which govern the universe. Several amazing coincidences which
provide conditions necessary for creation of life suggest that the "laws of
nature" are not uniquely determined. The idea that our universe is only one
among a multitude of universes with different physical laws, as predicted by
the theory of chaotic cosmic inflation, provides a logically simple, but
speculative resolution of the anthropic principle. An important insight of
modern quantum field theory is that the physical laws are not only determined
by symmetry principles, but also by the nature of the vacuum state. Experiments
involving collisions of relativistic heavy ions provide the clearest tests of
the hypothesis that properties of particles and forces can be modified by a
change in the vacuum state. We outline the goals of these experiments and
briefly review their current status.


title: Analysis of Theta^+ production in K^+Xe collisions

abstract:
  The reaction K^+Xe->K^0pX is investigated in a meson-exchange model including
rescattering of the secondary protons with the aim to analyze the evidence for
the Theta^+(1540) resonance reported by the DIANA collaboration. We confirm
that the kinematical cuts introduced by the DIANA collaboration efficiently
suppress the background to the K^+n->K^0p reaction which may contribute to the
Theta^+(1540) production. We find that these kinematical cuts do not produce a
narrow structure in the K^0p effective mass spectra near 1540 MeV. We study the
effect of a narrow Theta^+ resonance of both positive and negative parity in
comparison with the DIANA data. We show that the K^+Xe->K^0pX calculations
without Theta^+ contribution as well as the results obtained with a Theta^+
width of 1 MeV are in comparably good agreement with the DIANA results. More
dedicated experiments are called for to establish this exotic baryon resonance.


title:
Transverse momentum versus multiplicity fluctuations in high-energy
  nuclear collisions

abstract:
  We discuss recently measured event-by-event fluctuations of transverse
momentum and of multiplicity in relativistic heavy-ion collisions. It is shown
that the non-monotonic behavior of the p_T-fluctuations as a function of
collision centrality can be fully explained by the observed non-monotonic
multiplicity fluctuations. A possible mechanism responsible for the
multiplicity fluctuations is also considered.


title:
Remarcs on the shape transition from spherical to deformed gamma
  unstable nuclei

abstract:
  Energies and transition probabilities for low lying states in $^{134}$Ba and
$^{104$Ru were calculated within a hybrid model.The ground and the first $2^+$
states are described alternatively as a harmonic and anharmonic vibrator states
while the remaining states as states with E(5) symmetry. One concludes that a
gradual setting of the 'critical' potential yields a better agreement with the
experimental data. Very good agreement with the data is obtained for
$^{104}$Ru. Comparing the present results with those of E(5) symmetry, it is
conspicuous that the present formalism add corrections to the E(5) formalism by
bringing the predictions closer to the experimental data. Analytical
relationship between the states with U(5) symmetry and those given by the E(5)
description is established.


title:
Monte Carlo Modelling of the Electron Spectra of 235U- and 239Pu- Films,
  Irradiated by Thermal Neutrons, Due to All Possible Mechanisms Excluding
  b-Decay. Comparison With Experiment

abstract:
  The electron energy spectra, not connected to b-decay, of 235U- and
239Pu-films, irradiated by thermal neutrons, obtained by a Monte Carlo method
is presented in the given work. The modelling was performed with the help of a
computer code MCNP4C (Monte Carlo Neutron Photon transport code system),
allowing to carry out the computer experiments on joint transport of neutrons,
photons and electrons. The experiment geometry and the parameters of an
irradiation were the same, as in [11] (the thickness of a foil varied only). As
a result of computer experiments, the electron spectra was obtained for the
samples of 235U, 239Pu and uranium dioxide of 93 % enrichment representing a
set of films of 22 mm in diameter and different thickness: 0,001 mm, 0,005 mm,
0,02 mm, 0,01 mm, 0,1 mm, 1,0 mm; and also for the uranium dioxide film of 93 %
enrichment (diameter 22 mm and thickness 0,01mm), located between two
protective 0,025 mm aluminium disks (the conditions of experiment in [11]) and
the electron spectrum was fixed at the output surface of a protective disk. The
comparative analysis of the experimental [11] and calculated b--spectra is
carried out.


title:
Unified semiclassical approach to isoscalar collective modes in heavy
  nuclei

abstract:
  A semiclassical model based on the solution of the Vlasov equation for finite
systems with a sharp moving surface has been used to study the isoscalar
quadrupole and octupole collective modes in heavy spherical nuclei. Within this
model, a unified description of both low-energy surface modes and higher-energy
giant resonances has been achieved by introducing a coupling between surface
vibrations and the motion of single nucleons. Analytical expressions for the
collective response functions of different multipolarity can be derived by
using a separable approximation for the residual interaction between nucleons.
The response functions obtained in this way give a good qualitative description
of the quadrupole and octupole response in heavy nuclei. Although shell effects
are not explicitly included in the theory, our semiclassical response functions
are very similar to the quantum ones. This happens because of the well known
close relation between classical trajectories and shell structure. The role
played by particular nucleon trajectories and their connection with various
features of the nuclear response is displayed most clearly in the present
approach, we discuss in some detail the damping of low-energy octupole
vibrations and give an explicit expression showing that only nucleons moving on
triangular orbits can contribute to this damping.


title: A possible explanation for AMS doubly charged anomalous event

abstract:
  By means of the quark mass density-dependent model, a possible explanation
for the doubly charged anomalous event with Z/A=0.114 reported by Alpha
Magnetic Spectrometer Collaboration is given. It seems a strangelet. The
composition, radius and mean lifetime of this strangelet are given.


title: Electromagnetic form factors of hyperons in a relativistic quark model

abstract:
  The relativistically covariant constituent quark model developed by the Bonn
group is used to compute the EM form factors of strange baryons. We present
form-factor results for the ground-state and some excited hyperons. The
computed magnetic moments agree well with the experimental values and the
magnetic form factors follow a dipole $Q^2$ dependence.


title: Novel NN interaction and the spectroscopy of light nuclei

abstract:
  Nucleon-nucleon (NN) phase shifts and the spectroscopy of $A \le 6$ nuclei
are successfully described by an inverse scattering potential that is separable
with oscillator form factors.


title:
Drell-Hearn-Gerasimov Sum-Rule for the Deuteron in Nuclear Effective
  Field Theory

abstract:
  The Drell-Hearn-Gerasimov sum rule for the deuteron is studied in nuclear
effective field theory. The low-energy theorem for the spin-dependent Compton
amplitude $f_1(\omega)$ is derived to the next-to-leading order in low-energy
expansion. The spin-dependent photodisintegration cross section
$\sigma^P-\sigma^A$ is calculated to the same order, and its contribution to
the dispersive integral is evaluated.


title: Alpha matter on a lattice

abstract:
  We obtain the equation of state of interacting alpha matter and the critical
temperature of Bose-Einstein condensation of alpha particles within an
effective scalar field theory. We start from a non-relativistic model of
uniform alpha matter interacting with attractive two-body and repulsive
three-body potentials and reformulate this model as a O(2) symmetric scalar
\phi^6 field theory with negative quartic and positive sextic interactions.
Upon restricting the Matsubara sums, near the temperature of Bose-Einstein
condensation, to the zeroth order modes we further obtain an effective
classical theory in three spatial dimensions. The phase diagram of the alpha
matter is obtained from simulations of this effective field theory on a lattice
using local Monte-Carlo algorithms.


title:
Electroexcitation of the P33(1232), P11(1440), D13(1520), S11(1535) at
  Q^2=0.4 and 0.65(GeV/c)^2

abstract:
  Using two approaches: dispersion relations and isobar model, we have analyzed
recent high precision CLAS data on cross sections of \pi^0, \pi^+, and \eta
electroproduction on protons, and the longitudinally polarized electron beam
asymmetry for p(\vec{e},e'p)\pi^0 and p(\vec{e},e'n)\pi^+. The contributions of
the resonances P33(1232), P11(1440), D13(1520), S11(1535) to \pi
electroproduction and S11(1535) to \eta electroproduction are found. The
results obtained in the two approaches are in good agreement with each other.
There is also good agreement between amplitudes of the \gamma^* N \to S11(1535)
transition found in \pi and \eta electroproduction. For the first time accurate
results are obtained for the longitudinal amplitudes of the P11(1440),
D13(1520) and S11(1535) electroexcitation on protons.


title: Towards the 3D-Imaging of Sources

abstract:
  Geometric details of a nuclear reaction zone, at the time of particle
emission, can be restored from low relative-velocity particle-correlations,
following imaging. Some of the source details get erased and are a potential
cause of problems in the imaging, in the form of instabilities. These can be
coped with by following the method of discretized optimization for the restored
sources. So far it has been possible to produce 1-dimensional emission source
images, corresponding to the reactions averaged over all possible spatial
directions. Currently, efforts are in progress to restore angular details.


title: Relativistic Pseudospin Symmetry as a Supersymmetric Pattern in Nuclei

abstract:
  Shell-model states involving several pseudospin doublets and ``intruder''
levels in nuclei, are combined into larger multiplets. The corresponding
single-particle spectrum exhibits a supersymmetric pattern whose origin can be
traced to the relativistic pseudospin symmetry of a nuclear mean-field Dirac
Hamiltonian with scalar and vector potentials.


title:
Calculations of the Exclusive Processes 2H(e,e'p)n, 3He(e,e'p)2H and
  3He(e,e'p)(pn) within a Generalized Glauber Approach

abstract:
  The exclusive processes 2H(e,e'p)n, 3He(e,e'p)2H and 3He(e,e'p)(pn), have
been analyzed using realistic few-body wave functions and treating the final
state interaction (FSI) within a Generalized Eikonal Approximation (GEA), based
upon the direct calculation of the Feynman diagrams describing the rescattering
of the struck nucleon with the nucleons of the A-1 system. The approach
represents an improvement of the conventional Glauber approach (GA), in that it
allows one to take into account the effects of the nuclear excitation of the
$A-1$ system on the rescattering of the struck nucleon. Using realistic
three-body wave functions corresponding to the AV18 interaction, the results of
our parameter free calculations are compared with available experimental data.
It is found that in some kinematical conditions FSI effects represent small
corrections, whereas in other kinematics conditions they are very large and
absolutely necessary to provide a satisfactory agreement between theoretical
calculations and experimental data. It is shown that in the kinematics of the
experimental data which have been considered, covering the region of missing
momentum and energy with p_m < 0.6 GeV/c and E_m < 100 MeV in the perpendicular
kinematics, the GA and GEA predictions differ only by less than 3-4 %.


title: Baryonic Resonances from Baryon Decuplet-Meson Octet Interaction

abstract:
  We study $S$-wave interactions of the baryon decuplet with the octet of
pseudoscalar mesons using the lowest order chiral Lagrangian. In the S=1
sector, we find an attractive interaction in the $\Delta K$ channel with I=1
while it is repulsive for I=2. The attractive interaction leads to a pole in
the second Riemann sheet of the complex plane and is manifested as a large
strength in the scattering amplitude close to the $\Delta K$ threshold, which
is not the case for I=2.
  We use the unitarized coupled channel approach to also investigate all the
other possible values of strangeness and isospin. We find two bound states in
the SU(3) limit corresponding to the octet and decuplet representations. These
are found to split into eight different trajectories in the complex plane when
the SU(3) symmetry is broken gradually. Finally, we are able to provide a
reasonable description for a good number of 4-star ${{3/2}}^-$ resonances
listed by the Particle Data Group. In particular, the $\Xi(1820)$, the
$\Lambda(1520)$ and the $\Sigma(1670)$ states are well reproduced. We predict a
few other resonances and also evaluate the couplings of the observed resonances
to the various channels from the residues at the poles of the scattering matrix
from where partial decay widths into different channels can be evaluated.


title:
Momentum distributions in stripping reactions of radioactive projectiles
  at intermediate energies

abstract:
  The theory of one-nucleon removal in the stripping reaction (inelastic
breakup) on a light target is extended to cover two-dimensional momentum
distributions of the reaction residues with the use of realistic profile
functions for the core-target and nucleon-target interactions. Examples of the
calculated projected parallel- and transverse momentum distributions are given.
The transverse momentum distributions, projections on a Cartesian axis
perpendicular to the beam direction, show an interesting intermingling of the
stripping reaction with elastic scattering of the reaction residue on the
target. We also obtain doubly-differential distributions of the cross section
on the parallel- and transverse-momentum variables. The distributions depend
strongly on the value of the magnetic quantum number $m$. They will be of
importance for evaluating acceptance corrections in experiments, and they lead
to alignment with the possibility of anisotropic emission of subsequent gamma
rays, an interesting spectroscopic tool. Experimental data for proton stripping
of $^{8}$B agree with our calculations.


title:
Predicting total and total reaction cross sections using a simple
  functional form

abstract:
  Total reaction cross sections have been predicted for neucleons scattering
from nuclei ranging in mass 6 to 238 and for projectile energies from just
above noticeable giant resonance excitation to 300 MeV. So also have been the
mass variations of those cross sections at selected energies when they have
been calculated using coordinate space optical potentials formed by full
folding effective two-nucleon (NN) interactions with one body density matrix
elements (OBDME) of the nuclear ground states. Good comparisons with data
result when effective NN interactions defined by medium modification of free NN
t matrices are used. However, there is a simple three parameter functional form
that reproduces the partial wave total reaction cross section values determined
from those optical potential calculations; a functional form also maps the
total scattering cross section partial wave elements. Adjusting the theoretical
defined parameter values has enabled us to fit the actual measured data values
from scattering involving (15) nuclei spanning the mass range from 9Be to 238U
and for proton energies from 10 to 300 MeV. Likewise total cross sections for
neutron cross sections for neutron scattering from various nuclei can be
equally well reproduced. Of import is that the three parameter values vary
smoothly with mass and energy.


title:
Simple functional forms for total cross sections from neutron-nucleus
  collisions

abstract:
  Neutron scattering total cross sections have been estimated from nuclei
ranging in mass 6 to 238 and for neutron energies 10 MeV to 600 MeV using a
simple function of three parameters. These total cross sections have also been
calculated using coordinate space optical potentials formed by full folding
effective two-nucleon (NN) interactions with one body density matrix elements
(OBDME) of the nuclear ground states. Adjusting the theoretically defined
parameter values has enabled us to fit the actual measured data. The simple
functional parameter values vary smoothly with mass and energy.


title:
Effect of a finite-time resolution on Schr\"{o}dinger Cat States in
  complex collisions

abstract:
  We study the effect of finite time resolution on coherent superpositions of
rotating clockwise and anticlockwise wave packets in the regime of strongly
overlapping resonances of the intermediate complex. Such highly excited
deformed complexes may be created in binary collisions of heavy-ions, molecules
and atomic clusters. It is shown that time averaging reduces the interference
fringes acting effectively as dephasing. We propose a simple estimate of the
``critical'' time averaging interval. For the time averaging intervals bigger
than the critical one the interference fringes wash out appreciably. This is
confirmed numerically. We evaluate minimal energy intervals for measurements of
the excitation functions needed to observe the Schr\"{o}dinger Cat States.
These should be easily observable in heavy-ion scattering. Such an experiment
is suggested.


title: Hadron attenuation at HERMES by (pre)hadronic FSI

abstract:
  We investigate hadron formation in high energy electroproduction off complex
nuclei in the framework of a BUU transport model. Our approach combines a
quantum mechanical treatment of the photon's initial state interactions with a
semi-classical coupled channel simulation of the (pre)hadronic final-state
interactions (FSI). This allows us to study the hadron attenuation observed at
HERMES and to get information on the space-time picture of hadron formation
separately for $\pi^{\pm}$, $\pi^0$, $K^\pm$, $p$ and $\bar{p}$.


title: To what extent does the self-consistent mean-field exist?

abstract:
  A non-convergent difficulty near level-repulsive region is discussed within
the self-consistent mean-field theory. It is shown by numerical and analytic
studies that the mean-field is not realized in the many-fermion system when
quantum fluctuations coming from two-body residual interaction and quadrupole
deformation are larger than an energy difference between two avoided crossing
orbits. An analytic condition indicating a limitation of the mean-field concept
is derived for the first time.


title:
Determination of the stiffness of the nuclear symmetry energy from
  isospin diffusion

abstract:
  With an isospin- and momentum-dependent transport model, we find that the
degree of isospin diffusion in heavy ion collisions at intermediate energies is
affected by both the stiffness of the nuclear symmetry energy and the momentum
dependence of the nucleon potential. Using a momentum dependence derived from
the Gogny effective interaction, recent experimental data from NSCL/MSU on
isospin diffusion are shown to be consistent with a nuclear symmetry energy
given by $E_{\text{sym}}(\rho)\approx 31.6(\rho /\rho_{0})^{1.05} $ at
subnormal densities. This leads to a significantly constrained value of about
-550 MeV for the isospin-dependent part of the isobaric incompressibility of
isospin asymmetric nuclear matter.


title: Full-Coupled Channel Approach to Doubly Strange $s$-Shell Hypernuclei

abstract:
  We describe {\it ab initio} calculations of doubly strange, $S=-2$, $s$-shell
hypernuclei ($^4_{\Lambda\Lambda}$H, $^5_{\Lambda\Lambda}$H,
  $^5_{\Lambda\Lambda}$He and $^6_{\Lambda\Lambda}$He) as a first attempt to
explore the few-body problem of the {\it full}-coupled channel scheme for these
systems. The wave function includes $\Lambda\Lambda$, $\Lambda\Sigma$,
  $N\Xi$ and $\Sigma\Sigma$ channels. Minnesota $NN$, D2$^\prime$ $YN$, and
simulated $YY$ potentials based on the Nijmegen hard-core model, are used.
  Bound state solutions of these systems are obtained. We find that a set of
phenomenological $B_8B_8$ interactions among the octet baryons in $S=0, -1$ and
-2 sectors, which is consistent with all of the available experimental binding
energies of $S=0, -1$ and -2 $s$-shell (hyper-)nuclei, can predict a particle
stable bound state of $^4_{\Lambda\Lambda}$H.
  For $^5_{\Lambda\Lambda}$H and $^5_{\Lambda\Lambda}$He, $\Lambda N-\Sigma N$
and $\Xi N-\Lambda\Sigma$ potentials enhance the net $\Lambda\Lambda-N\Xi$
coupling, and a large $\Xi$ probability is obtained even for a weaker
$\Lambda\Lambda-N\Xi$ potential.


title:
Simple function form for n+208Pb total cross section between 5 and 600
  MeV

abstract:
  The total cross section for neutron scattering from 208Pb with energies
between 5 and 600 MeV has been analyzed extending a previously defined simple
function of three parameters to reveal a Ramsauer-like effect throughout the
whole energy range. This effect can be parametrized in a simple way so that it
may be anticipated that the complete function prescription will apply for total
cross sections from other nuclei.


title:
In-medium properties of antikaons at finite temperature: the K^-/K^+
  ratio at GSI

abstract:
  The $K^-/K^+$ ratio in heavy-ion collisions at GSI is studied including the
properties of the participating hadrons in hot and dense matter, paying a
particular attention to the in-medium properties of antikaons at finite
temperature. The determination of the temperature and chemical potential at
freeze-out conditions compatible with the ratio $K^-/K^+$ is very delicate, and
depends on the approach adopted for the antikaon self-energy. Different
approaches for the $K^-$ self-energy have been considered: non-interacting
$K^-$, on-shell self-energy and single-particle spectral density. We observe
that the use of an energy dependent $\bar{K}$ spectral density lowers
considerably the freeze-out temperature with respect to the on-shell approach.
We also conclude that the full off-shell approach gives rise to the "broad-band
equilibration" advocated by Brown, Rho and Song.


title: Adjustment studies in self-consistent relativistic mean-field models

abstract:
  We investigate the influence of the adjustment procedure and the set of
measured observables on the properties and predictive power of relativistic
self-consistent mean-field models for the nuclear ground state. These studies
are performed with the point-coupling variant of the relativistic mean-field
model. We recommend optimal adjustment algorithms for the general two-part
problem and we identify various trends and dependencies as well as deficiencies
of current models. Consequences for model improvements are presented.


title: Isospin dependence of the three-nucleon force

abstract:
  We classify $A$--nucleon forces according to their isospin dependence and
discuss the most general isospin structure of the three--nucleon force. We
derive the leading and subleading isospin--breaking corrections to the
three--nucleon force using the framework of chiral effective field theory.


title: On the nucleon self-energy in nuclear matter

abstract:
  We consider the nucleon self-energy in nuclear matter in the absence of Pauli
blocking. It is evaluated using the partial-wave analysis of $NN$ scattering
data. Our results are compared with that of a realistic calculation to estimate
the effect of this blocking. It is also possible to use our results as a check
on the realistic calculations.


title:
Spin-orbit splitting of 9 Lambda Be excited states studied with the SU_6
  quark-model baryon-baryon interactions

abstract:
  The previous Faddeev calculation of the two-alpha plus Lambda system for 9
Lambda Be is extended to incorporate the spin-orbit components of the SU_6
quark-model baryon-baryon interactions. We employ the Born kernel of the
quark-model Lambda N LS interaction, and generate the spin-orbit component of
the Lambda alpha potential by the alpha-cluster folding. The Faddeev
calculation in the jj-coupling scheme implies that the direct use of the
quark-model Born kernel for the Lambda N LS component is not good enough to
reproduce the small experimental value Delta E^exp_{ls}=43 +- 5 keV for the
5/2^+ - 3/2^+ splitting. This procedure predicts three to five times larger
values in the model FSS and fss2. The spin-orbit contribution from the
effective meson-exchange potentials in fss2 is argued to be unfavorable to the
small ls splitting, through the analysis of the Scheerbaum factors for the
single-particle spin-orbit potentials calculated in the G-matrix formalism.


title: 7Be breakup on heavy and light targets

abstract:
  In this paper we present all-order quantum mechanical calculations of 7Be
breakup on heavy (208Pb) and light (12C) targets. We examine the issues
concerning the extraction of the astrophysical S-factor from the breakup data.
We discuss the interplay between Coulomb and nuclear breakup, and the
importance of higher-order couplings on the cross section. We show that nuclear
and Coulomb contributions are not separable using the standard angular
selection criterion as nuclear breakup remains large for small scattering
angles, even for the heavy target. However, by selecting an upper limit on the
relative energy between the final fragments, the contribution from the nuclear
breakup can be significantly reduced such that Coulomb breakup is the main
reaction mechanism. We show that the extraction of the asymptotic normalization
coefficient may require more careful consideration of the nuclear interior than
previously used.


title: Azimuthally sensitive correlations in nucleus-nucleus collisions

abstract:
  We define a set of model-independent observables which generally characterize
the azimuthal dependence of two-particle correlations in nucleus-nucleus
collisions. We explain how they can be analyzed, and show to what extent such
analyses are model dependent. We discuss specific applications to the
anisotropic flow of decaying particles, azimuthally sensitive HBT, and
correlations between particles at large transverse momentum. A quantitative
prediction is made for jet quenching with respect to the reaction plane.


title: Annihilation Mechanism of Dilepton Emission from Finite Fireball

abstract:
  Medium-induced modifications of the pion and quark-antiquark annihilation
mechanisms of dilepton production during relativistic heavy ion collisions are
considered. Due to the dense hadron environment, the pions produced during a
collision are effectively confined in a finite volume, in which they live for a
finite time which is scaled as the lifetime of a fireball. Our results indicate
that, due to the space-time finiteness of the pion system which generates the
corresponding quantum randomization, the dilepton rates are finite in the
invariant low-mass region M<2m_\pi. It is found that the spatial finiteness of
quark wave functions and the finiteness of the lifetime of excited states
result in the same effect for the quark-antiquark annihilation to dileptons.
The breaking of the detailed energy-momentum conservation due to the broken
translation invariance is discussed.


title: Parity-Dependence in the Nuclear Level Density

abstract:
  Astrophysical reaction rates are sensitive to the parity distribution at low
excitation energies. We combine a formula for the energy-dependent parity
distribution with a microscopic-macroscopic nuclear level density. This
approach describes well the transition from low excitation energies, where a
single parity dominates, to high excitations where the two densities are equal.


title:
Optimal Fermi-averaging t-matrix for ($\pi^+$,$K^+$) reactions in
  $\Lambda$ quasi-free region

abstract:
  We propose an optimal Fermi-averaging for an elementary
$\pi^+$+$n$$\to$$K^+$+$\Lambda$ t-matrix under the on-energy-shell condition,
in order to describe ($\pi^+$,$K^+$) reactions on a nuclear target in the
framework of a distorted-wave impulse approximation. We apply it to calculate
$\Lambda$ quasi-free spectra from $^{12}$C($\pi^+$,$K^+$) reactions at $p_\pi$=
1.20 GeV/c and 1.05 GeV/c, and compare them with experimental data. The results
show that the calculated spectra are in excellent agreement with the data,
because the energy-dependence originates from the nature of the optimal
Fermi-averaging t-matrix.


title:
Tensor analyzing powers in forward angle exclusive $\pi$-meson
  photoproduction on deuteron

abstract:
  The target tensor analyzing powers of the process $\gamma d -> \pi^{-}pp$ had
been studied in the plane wave impulse approximation, if both ejected protons
are detected in coincidence and in the directions, symmetrical respect to the
incoming photon momentum, being in the proton plane. The matrix elements of the
studied reaction become essentially simple, if the magnitudes of the proton
momenta p1 = p2 = p are equal. That proton kinematics keeps the ejected pion
angle near zero, therefore the one body pion production operator does not
include the spin-non-flip term. Moreover, the transition to the triplet,
spatially antisymmetric final pp- state is strongly suppressed from the
symmetrical deuteron S - state as well as matrix elements have a large
dependence from the orientation of the deuteron spin. The values of the
$T_{22}(\vec p)$ component, calculated with three realistic deuteron wave
functions in the proton momentum region p >= 350 MeV/c and proton polar angle
theta >= 40 deg., differ one from another noticeably.


title:
Towards a solution of the Gn/Gp puzzle in the weak decay of
  Lambda-hypernuclei

abstract:
  In this contribution we discuss an evaluation of double-nucleon coincidence
spectra for the non-mesonic weak decay of Lambda-hypernuclei. The results have
been obtained by combining a one-meson-exchange model for the Lambda N -> nN
transition in finite nuclei with a Monte Carlo code accounting for the nucleon
final state interactions. A weak-decay-model independent analysis of KEK
coincidence data allows us to extract Gn/Gp values around 0.3-0.4 for
5_Lambda-He and 12_Lambda-C, thus representing an important progress towards
the solution of the Gn/Gp puzzle. Preliminary results for the angular
asymmetries in the non-mesonic weak decay of polarized hypernuclei are also
presented.


title:
Comment on "Partial energies fluctuations and negative heat capacities"
  by X. Campi et al

abstract:
  Studying the energy partioning published in nucl-th/0406056v2 we show that
the presented results do not fulfill the sum rule due to energy conservation.
The observed fluctuations of the energy conservation test point to a numerical
problem. Moreover, analysis of the binding energies show that the fragment
recognition algorithm adopted by Campi et al. leads with a sizeable probability
to fragments containing up to the total mass even for excitation energies as
large as 3/4 of the total binding. This surprising result points to another
problem since the published inter-fragment energy is not zero while a unique
fragment is present. This problem may be due to either the fragment recognition
algorithm or to the definition of the inter and intra-fragment energy. These
numerical inconsistencies should be settled before any conclusion on the
physics can be drawn.


title: Momentum distribution in heavy deformed nuclei: role of effective mass

abstract:
  The impact of nuclear deformation on the momentum distributions (MD) of
occupied proton states in $^{238}$U is studied with a phenomenological
Woods-Saxon (WS) shell model and the self-consistent Skyrme-Hartree-Fock (SHF)
scheme. Four Skyrme parameterizations (SkT6, SkM*, SLy6, SkI3) with different
effective masses are used. The calculations reveal significant deformation
effects in the low-momentum domain of $K^{\pi}=1/2^{\pm}$ states, mainly of
those lying near the Fermi surface. For other states, the deformation effect on
MD is rather small and may be neglected. The most remarkable result is that the
very different Skyrme parameterizations and the WS potential give about
identical MD. This means that the value of effective mass, being crucial for
the description of the spectra, is not important for the spatial shape of the
wave functions and thus for the MD. In general, it seems that, for the
description of MD at $0\le k \le 300$ MeV/c, one may use any single-particle
scheme (phenomenological or self-consistent) fitted properly to the global
ground state properties.


title: Helicity asymmetries in double pion photoproduction on the proton

abstract:
  Based on a prior model on double pion photoproduction on the proton,
successfully tested in total cross sections and invariant mass distributions,
we make a theoretical study of the angular dependence of helicity asymmetries
from the interaction of circularly polarized photons with unpolarized protons.
We show that this observable is sensitive to details of the internal mechanisms
and, thus, represents a complementary test of the theoretical model.


title: Delta(1232) and Nucleon Spectral Functions in Hot Hadronic Matter

abstract:
  Modifications of Delta(1232) and nucleon spectral functions at finite
temperature and baryon density are evaluated in terms of resonant scattering
off thermal pions, as well as a renormalization of the vacuum Delta-width
including vertex corrections. The interactions are based on effective
Lagrangians of pions and baryon resonances, with underlying parameters
(coupling constants and form factors) determined by the elastic pi N scattering
phase shift in the isobar channel, and by empirical decay branchings of excited
resonances. Pion modifications are included via interactions in a pion gas, as
well as standard Delta- and nucleon-hole excitations in nuclear matter. In hot
hadronic matter, under conditions resembling thermal freezeout at the
Relativistic Heavy-Ion Collider (RHIC), the Delta exhibits a significant
broadening of ~65 MeV together with a slight upward peak shift of 5-10 MeV, in
qualitative agreement with preliminary data from the STAR collaboration.


title: The Nuclear Reactions in Standard BBN

abstract:
  Nowadays, the Cosmic Microwave Background (CMB) anisotropies studies
accurately determine the baryon fraction omega_b, showing an overall and
striking agreement with previous determinations of omega_b obtained from Big
Bang Nucleosynthesis (BBN). However, a deeper comparison of BBN predictions
with the determinations of the primordial light nuclides abundances shows
slight tensions, motivating an effort to further improve the accuracy of
theoretical predictions, as well as to better evaluate systematics in both
observations and nuclear reactions measurements. We present some results of an
important step towards an increasing precision of BBN predictions, namely an
updated and critical review of the nuclear network, and a new protocol to
perform the nuclear data regression.


title:
Soft Pion Emission from the Nucleon Induced by Twist-2 Light-Cone
  Operators

abstract:
  We compute the matrix elements for pion emission from the nucleon induced by
twist-two light-cone operators in the kinematics where the pion is close to
threshold. It is shown that the results of heavy baryon ChPT are in agreement
with the results from the soft-pion theorem approach. Therefore the amplitude
of soft-pion emission is directly related to the generalized parton
distributions in the nucleon.


title:
General Survey of Polarization Observables in Deuteron
  Electrodisintegration

abstract:
  Polarization observables in inclusive and exclusive electrodisintegration of
the deuteron using a polarized beam and an oriented target are systematically
surveyed using the standard nonrelativistic framework of nuclear theory but
with leading order relativistic contributions included. The structure functions
and the asymmetries corresponding to the various nucleon polarization
components are studied in a variety of kinematic regions with respect to their
sensitivity to realistic $NN$-potential models, to subnuclear degrees of
freedom in terms of meson exchange currents, isobar configurations and to
relativistic effects in different kinematical regions, serving as a benchmark
for a test of present standard nuclear theory with effective degrees of
freedom.


title: Energy dependence of transverse quark flow in heavy ion collisions

abstract:
  Energy dependence of quark transverse flow carries information about
dynamical properties (equation of state, initial conditions) of deconfined
matter produced in heavy ion collisions. We assume quark-antiquark matter
formation in Pb+Pb collisions at CERN SPS and Au+Au collisions at RHIC energies
and determine quark transverse flow at the critical temperature of the
quark-hadron phase transition. Coalescence of massive quarks is calculated in
the MICOR hadronization model and hadronic final state effects are considered
using the GROMIT cascade program. Comparing theoretical results to data,
transverse flow values are determined and energy dependence is discussed.


title:
Chiral and magnetic rotation in atomic nuclei studied within
  self-consistent mean-field methods

abstract:
  Currently, one application of the mean-field methods in nuclear physics is
the investigation of exotic nuclear symmetries. This is related, in particular,
to the study of nuclear rotation about an axis tilted with respect to the
principal axes of the mass distribution in the Tilted-Axis Cranking (TAC)
model. The present work presents one of the first TAC calculations performed
within fully self-consistent methods. The Hartree-Fock method with the Skyrme
effective two-body interaction has been used. A computer code has been
developed that allows for the breaking of all spatial symmetries of the
solution. As a first application, calculations for the magnetic bands in 142Gd
and for the chiral bands in 130Cs, 132La, 134Pr, and 136Pm have been carried
out. The appearance of those bands is due to a new mechanism of breaking the
spherical symmetry and to the spontaneous breaking of the chiral symmetry,
respectively. The self-consistent solutions for 142Gd confirm the important
role of the shears mechanism in generating the total angular momentum. However,
the agreement with experimental data is not satisfactory, probably due to the
lack of the pairing correlations in the calculations or to the possibly
overestimated deformation. The results obtained for 132La constitute the first
fully self-consistent proof that the nuclear rotation can attain a chiral
character. It has been shown that the chiral rotation can only exist above a
certain critical angular frequency. It has also been checked that the terms of
the Skyrme mean field odd under the time reversal have no qualitative influence
on the results.


title: Liquid-gas phase transition in nuclear matter including strangeness

abstract:
  We apply the chiral SU(3) quark mean field model to study the properties of
strange hadronic matter at finite temperature. The liquid-gas phase transition
is studied as a function of the strangeness fraction. The pressure of the
system cannot remain constant during the phase transition, since there are two
independent conserved charges (baryon and strangeness number). In a range of
temperatures around 15 MeV (precise values depending on the model used) the
equation of state exhibits multiple bifurcates. The difference in the
strangeness fraction $f_s$ between the liquid and gas phases is small when they
coexist. The critical temperature of strange matter turns out to be a
non-trivial function of the strangeness fraction.


title:
Liquid-gas phase transition and Coulomb instability of asymmetric
  nuclear systems

abstract:
  We use a chiral SU(3) quark mean field model to study the properties of
nuclear systems at finite temperature. The liquid-gas phase transition of
symmetric and asymmetric nuclear matter is discussed. For two formulations of
the model the critical temperature, $T_c$, for symmetric nuclear matter is
found to be 15.8 MeV and 17.9 MeV. These values are consistent with those
derived from recent experiments. The limiting temperatures for finite nuclei
are in good agreement with the experimental points.


title: Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron

abstract:
  An explicit evaluation of the spin asymmetry of the deuteron and the
associated GDH sum rule is presented which includes photodisintegration, single
and double pion and eta production as well. Photodisintegration is treated with
a realistic retarded potential and a corresponding meson exchange current. For
single pion and eta production the elementary operator from MAID is employed
whereas for double pion production an effective Lagrangean approach is used. A
large cancellation between the disintegration and the meson production channels
yields for the explicit GDH integral a value of 27.31 $\mu$b to be compared to
the sum rule value 0.65 $\mu$b.


title:
Shell-model-Like APproach (SLAP) for the nuclear properties in
  relativistic mean field theory

abstract:
  A Shell-model-Like APproach (SLAP) suggested to treat the pairing
correlations in relativistic mean field theory is introduced, in which the
occupancies thus obtained having been iterated back into the densities. The
formalism and numerical techniques are given in detail. As examples, the ground
state properties and low-lying excited states for Ne isotopes are studied. The
results thus obtained are compared with the data available. The binding
energies, the odd-even staggering, as well as the tendency for the change of
the shapes in Ne isotopes are correctly reproduced.


title: Reply to K. Amos et al. (nucl-th/0401055)

abstract:
  An expression for the spin-orbit interaction coupling between different
levels, which was shown to be aberrant more than thirty years ago persists in
the literature without clear indication of what is used. It leads to
expressions quite simpler than they should be. After an attempt to warn the
community of the nuclear physicists on this strange situation
(nucl-th/0312038), the authors of the publication in which the "aberrant"
interaction is described and used, try to justify their work (nucl-th/0401055),
by a very strange "symmetrization" of something already symmetric. They claim
also that their method allows to solve some problem related to the Pauli
principle and give some references, among which a book which reports the
solution of such problem almost forty years ago, with a very small effect. An
examination of their own results shows that their optimism is not completely
justified. Nevertheless, any user of ECIS, sensitive to their arguments, is
requested to ask their opinion to these five coauthors before publishing.


title: Comparison of Models of Critical Opacity in the Quark-Gluon Plasma

abstract:
  In this work we discuss two methods of calculation of quark propagation in
the quark-gluon plasma. Both methods make use of the Nambu-Jona-Lasinio model.
The essential difference of these calculations is the treatment of
deconfinement. A model of confinement is not included in the work of Gastineau,
Blanquier and Aichelin [hep-ph/0404207], however, the meson states they
consider are still bound for temperatures greater than the deconfinement
temperature T_c. On the other hand, our model deals with unconfined quarks and
includes a description of the q(bar)q resonances found in lattice QCD studies
that make use of the maximum entropy method (MEM). We compare the q{bar)q cross
sections calculated in these models.


title:
Radial flow has little effect on clusterization at intermediate energies
  in the framework of the Lattice Gas Model

abstract:
  The Lattice Gas Model was extended to incorporate the effect of radial flow.
Contrary to popular belief, radial flow has little effect on the clusterization
process in intermediate energy heavy-ion collisions except adding an ordered
motion to the particles in the fragmentation source. We compared the results
from the lattice gas model with and without radial flow to experimental data.
We found that charge yields from central collisions are not significantly
affected by inclusion of any reasonable radial flow.


title: Widths of $\bar K$-nuclear deeply bound states in a dynamical model

abstract:
  The relativistic mean field (RMF) model is applied to a system of nucleons
and a $\bar K$ meson, interacting via scalar and vector boson fields. The model
incorporates the standard RMF phenomenology for bound nucleons and, for the
$\bar K$ meson, it relates to low-energy ${\bar K}N$ and $K^-$ atom
phenomenology. Deeply bound $\bar K$ nuclear states are generated dynamically
across the periodic table and are exhibited for $^{12}$C and $^{16}$O over a
wide range of binding energies. Substantial polarization of the core nucleus is
found for these light nuclei. Absorption modes are also included dynamically,
considering explicitly the reduced phase space for $\bar K$ absorption from
deeply bound states. The behavior of the calculated width as function of the
$\bar K$ binding energy is studied in order to explore limits on the possible
existence of narrow $\bar K$ nuclear states.


title:
Relativistic description of exotic collective excitation phenomena in
  atomic nuclei

abstract:
  The low-lying dipole and quadrupole states in neutron rich nuclei, are
studied within the fully self-consistent relativistic quasiparticle
random-phase approximation (RQRPA), formulated in the canonical basis of the
Relativistic Hartree-Bogoliubov model (RHB), which is extended to include the
density dependent interactions. In heavier nuclei, the low-lying E1 excited
state is identified as a pygmy dipole resonance (PDR), i.e. as a collective
mode of excess neutrons oscillating against a proton-neutron core. Isotopic
dependence of the PDR is characterized by a crossing between the PDR and
one-neutron separation energies. Already at moderate proton-neutron asymmetry
the PDR peak is calculated above the neutron emission threshold, indicating
important implications for the observation of the PDR in (gamma,gamma')
scattering, and on the theoretical predictions of the radiative neutron capture
rates in neutron-rich nuclei. In addition, a novel method is suggested for
determining the neutron skin of nuclei, based on measurement of excitation
energies of the Gamow-Teller resonance relative to the isobaric analog state.


title:
Comparison of predictions for nuclear effects in the Marteau model with
  the NUX+FLUKA scheme

abstract:
  Nuclear effects in neutrino-nucleus reactions simulated by means of the
NUX+FLUKA Monte Carlo generator are compared with the theoretical predictions
of the Marteau model. Pion absorption in NUX+FLUKA and non-pionic Delta decays
in the Marteau model differ by about 30%. The fraction of pions produced due to
the re-interactions after primary quasi-elastic vertex is in the NUX+FLUKA
scheme much higher then provided by the Marteau model.


title: Hydrodynamic aspects of relativistic heavy ion collisions at RHIC

abstract:
  The current status of the application of hydrodynamics to ultrarelativistic
heavy ion collisions is reviewed. We elaborate on the arguments for strong
transverse flow and rapid thermalization and discuss future applications and
trends in hydrodynamics.


title: Thermalization at RHIC

abstract:
  Ideal hydroynamics provides an excellent description of all aspects of the
single-particle spectra of all hadrons with transverse momenta below about
1.5-2 GeV/c at RHIC. This is shown to require rapid local thermalization at a
time scale below 1 fm/c and at energy densities which exceed the critical value
for color deconfinement by an order of magnitude. The only known thermalized
state at such energy densities is the quark-gluon plasma (QGP). The rapid
thermalization indicates that the QGP is a strongly interacting liquid rather
than the weakly interacting gas of quarks and gluons that was previously
expected.


title: Pion photoproduction on nucleons in a covariant hadron-exchange model

abstract:
  We present a relativistic dynamical model of pion photoproduction on the
nucleon in the resonance region. It offers several advances over the existing
approaches. The model is obtained by extending our $\pi N$-scattering
description to the electromagnetic channels. The resulting photopion amplitude
is thus unitary in the $\pi N$, $\ga N$ channel space, Watson's theorem is
exactly satisfied. At this stage we have included the pion, nucleon,
$\De(1232)$-resonance degrees of freedom. The $\rho$ and $\omega$ meson
exchanges are also included, but play a minor role in the considered energy
domain (up to $\sqrt{s}=1.5$ GeV). In this energy range the model provides a
good description of all the important multipoles. We have allowed for only two
free parameters -- the photocouplings of the $\Delta$-resonance. These
couplings are adjusted to reproduce the strength of corresponding
resonant-multipoles $M_{1+}$ and $E_{1+}$ at the resonance position.


title:
$\gamma^{*}N\Delta$ Form Factors from a Relativistic Dynamical Model of
  Pion Electroproduction

abstract:
  We obtain the electromagnetic form factors of the $\gamma N\Delta$ transition
by analyzing recent pion-electroproduction data using a fully relativistic
dynamical model. Special care is taken to satisfy Ward-Takahashi identities for
the Born term in the presence of form factors thereby allowing the use of
realistic electromagnetic form factors of the nucleon and pion. We parametrize
the $Q^2$ dependence of the {\it bare} $\gamma N \Delta$ form factors by a
three-parameter form which is consistent with the asymptotic behavior inferred
from QCD. The parameters of the bare $\gamma N \Delta$ form factors are the
only free parameters of the model and are fitted to the differential
cross-section and multipole-analysis data up to $Q^2=4$ (GeV/c)$^2$ in the
$\Delta(1232)$-resonance region. This analysis emphasizes the significance of
the pion-cloud effects in the extraction of the resonance parameters.


title: The Relativistic Dirac-Brueckner Approach to Asymmetric Nuclear Matter

abstract:
  The properties of asymmetric nuclear matter have been investigated in a
relativistic Dirac-Brueckner-Hartree-Fock framework using the Bonn A potential.
The components of the self-energies are extracted by projecting on Lorentz
invariant amplitudes. Furthermore, the optimal representation scheme for the
$T$ matrix, the subtracted $T$ matrix representation, is applied and the
results are compared to those of other representation schemes. Of course, in
the limit of symmetric nuclear matter our results agree with those found in
literature. The binding energy $E_b$ fulfills the quadratic dependence on the
asymmetry parameter and the symmetry energy is 34 MeV at saturation density.
Furthermore, a neutron-proton effective mass splitting of $m_n^* < m_p^*$ is
found. In addition, results are given for the mean-field effective coupling
constants.


title:
On the degeneracies of the mass-squared differences for three-neutrino
  oscillations

abstract:
  Using an algebraic formulation, we explore two well-known degeneracies
involving the mass-squared differences for three-neutrino oscillations assuming
CP symmetry is conserved. For vacuum oscillation, we derive the expression for
the mixing angles that permit invariance under the interchange of two
mass-squared differences. This symmetry is most easily expressed in terms of an
ascending mass order. This can be used to reduce the parameter space by one
half in the absence of the MSW effect. For oscillations in matter, we derive
within our formalism the known approximate degeneracy between the standard and
inverted mass hierarchies in the limit of vanishing $\theta_{13}$. This is done
with a mass ordering that permits the map $\Delta_{31} \mapsto -\Delta_{31}$.
Our techniques allow us to translate mixing angles in this mass order
convention into their values for the ascending order convention. Using this
dictionary, we demonstrate that the vacuum symmetry and the approximate
symmetry invoked for oscillations in matter are distinctly different.


title: The electro-disintegration of few body systems revisited

abstract:
  Recent studies of the electro-disintegration of the few body systems at JLab
have revived the field. Not only recoil momentum distributions have been
determined in a single shot. But also they confirm that the diagrammatic
approach, which I developed 25 years ago, is relevant to analyze them, provided
that the Nucleon-Nucleon scattering amplitude, determined in the same energy
range, is used. They provide us with a solid starting point to address the
issue of the propagation of exotic components of hadrons in nuclear matter


title: Bounds on the bound \eta ^3He system

abstract:
  We investigate the relation between the \eta ^3He binding energy and width
and the (complex) \eta ^3He scattering length. Following our systematic
analysis of the eta 3He scattering length we set limits on the \eta ^3He
binding. If bound states exist the binding energy (width) should not exceed 5
MeV (10 MeV). In addition, we comment on a recently claimed observation of an
\eta-mesic ^3He quasi-bound state by the TAPS collaboration based on \eta
photoproduction data. Although our limits are in reasonable agreement with the
values reported by this collaboration, our analysis of these data does not lead
to a solid conclusion concerning the existence of an \eta-mesic bound state.
More dedicated experiments are necessary for further clarification.


title:
Form factors in relativistic quantum mechanics: Is there a favored
  approach? Why?

abstract:
  Form factors of a simple system have been calculated in various forms of
relativistic quantum mechanics, using a single-particle current. Their
comparison has shown large discrepancies. The comparison is extended here to
instant- and front-form calculations in unusual momentum configurations as well
as to a point-form approach inspired from the Dirac's one (based on a
hyperboloid surface). It is found that these new results depend on the momentum
transfer, Q, through its ratio to the total mass, Q/M, (closely related to the
Breit-frame velocity of the system). They evidence features similar for a part
to those shown by an earlier ``point-form'' implementation (based on
hyperplanes perpendicular to the velocity of the initial and final states). It
thus appears that the standard instant- and front-form calculations, which
generally do well compared either to experiment or to predictions of a
theoretical model, rather represent exceptional cases. An argument explaining
the success of these last approaches is presented and discussed. It is based on
transformations of currents under Poincar\'e space-time translations, going
beyond the energy-momentum conservation property which results from the
Lagrangian invariance under them. Depending on the approach, analytic or
approximate numerical methods are proposed to correct form factors for missing
constraints then expected.


title: Vector meson angular distributions in proton-proton collisions

abstract:
  The resonance model is used to analyze the omega- and phi-meson angular
distributions in proton-proton collisions at sqrt{s} = 2.83 and 2.98 GeV. The
assumption of dominant contributions from N^*(1720)3/2+ and N^*(1900)3/2+
resonances which both have, according to the pi N scattering multichannel
partial-wave analysis and/or quark models predictions, dominant p_{1/2} N-omega
decay modes yields the right pattern of the omega angular distribution at
sqrt{s} = 2.83 GeV. The angular distribution at sqrt{s} = 2.98 GeV can be
reproduced assuming the dominance of N^*(2000)5/2+ and N^*(1900)3/2+. The
experimental phi-meson angular distributions do not shown any asymmetry which
requires the existence of a massive negative-parity spin-half resonance. This
resonance could be identified with the N^*(2090)1/2-.


title:
Energy Systematics of Low-lying Collective States within the Framework
  of the Interacting Vector Boson Model

abstract:
  In a new application of the algebraic Interacting Vector Boson Model (IVBM),
we exploit the reduction of its Sp(12,R) dynamical symmetry group to Sp(4,R) x
SO(3), which defines basis states with fixed values of the angular momentum L.
The relationship of the latter to $U(6) \subset U(3)x U(2), which is the
rotational limit of the model, means the energy distribution of collective
states with fixed angular momentum can be studied. Results for low-lying
spectra of rare-earth nuclei show that the energies of collective positive
parity states with L=0,2,4,6... lie on second order curves with respect to the
number of collective phonons n or vector bosons N=4n out of which the states
are built. The analysis of this behavior leads to insight regarding the common
nature of collective states, tracking vibrational as well as rotational
features.


title: Relativistic nature of the EMC effect

abstract:
  The deep inelastic scattering of leptons off nuclei is considered within the
the Bethe-Salpeter formalism. It is shown that nuclear short-range structure
can be expressed in terms of the nucleon structure functions and
four-dimensional Fermi motion of the nucleons. The four-dimensional Fermi
motion broadens the bound nucleon localization area, what lead to the
observation of the nucleon structure change in nuclei -- EMC effect. The $\rm
^4He$ to deuteron structure functions ratio is found in good agreement with
experimental data. It is shown that the pattern of the ratio is defined by
dynamical properties of the nucleon structure.


title: Orthonormalization procedure for chiral effective nuclear field theory

abstract:
  We show that the Q-box expansion of nuclear many-body physics can be applied
in nuclear effective field theory with explicit pions and external sources. We
establish the corresponding power counting and give an algorithm for the
construction of a hermitean and energy-independent potential for arbitrary
scattering processes on nucleons and nuclei to a given order in the chiral
expansion. Various examples are discussed in some detail.


title:
Quantum field theoretic model of metastable resonant spin-singlet state
  of the np pair

abstract:
  The np pair in the spin-singlet state is treated as a Cooper np-pair within
the extension of the Nambu-Jona-Lasinio model of light nuclei, describing the
deuteron as a Cooper np-pair in the spin-triplet state. For the Cooper np-pair
in the spin-singlet state we compute the binding energy and express the S-wave
scattering length of np scattering in the spin-singlet state in terms of the
binding energy. The theoretical value of the S-wave scattering length of np
scattering agrees well with the experimental data.

categories: nucl-th astro-ph cond-mat.supr-con hep-ph


title: The $J/\psi-K^*$ dissociation cross section in a meson exchange model

abstract:
  In this work we study the energy dependence of the $J/\psi-K^*$ dissociation
cross section, using a meson exchange model based on effective hadronic
Lagrangian that includes couplings between pseudoscalar and vector mesons. We
also consider anomalous parity terms.
  Off-shell effects at the vertices were handled with QCD sum rule estimates
for the running coupling constants, and we compare the results with and without
form factors. We also study the $J/\psi-\rho$ cross section with form factors.
The total $J/\psi-K^*$ cross section was found to be $1.6 \sim1.9$ mb for
$4.2\leq\sqrt{s}\leq5~\GeV$.


title: Dihadron Correlation in Jets Produced in Heavy-Ion Collisions

abstract:
  The difference between the structures of jets produced in heavy-ion and
hadronic collisions can best be exhibited in the correlations between particles
within those jets. We study the dihadron correlations in jets in the framework
of parton recombination. Two types of triggers, $\pi^+$ and proton, are
considered. It is shown that the recombination of thermal and shower partons
makes the most important contribution to the spectra of the associated
particles at intermediate $p_T$. In $pp$ collisions the only significant
contribution arises from shower-shower recombination, which is negligible in
heavy-ion collisions. Moments of the associated-particle distributions are
calculated to provide simple summary of the jet structures for easy comparison
with experiments.


title:
Onset of intruder ground state in exotic Na isotopes and evolution of
  the N=20 shell gap

abstract:
  The onset of intruder ground states in Na isotopes is investigated by
comparing experimental data and shell-model calculations. This onset is one of
the consequences of the disappearance of the N=20 magic structure, and the Na
isotopes are shown to play a special role in clarifying the change of this
magic structure. Both the electromagnetic moments and the energy levels clearly
indicate an onset of ground state intruder configurations at neutron number
N=19 already, which arises only with a narrow N=20 shell gap in Na isotopes
resulting from the spin-isospin dependence of the nucleon-nucleon interaction
(as compared to a wider gap in stable nuclei like 40Ca). It is shown why the
previous report based on the mass led to a wrong conclusion.


title: Neutron stars in a Skyrme model with hyperons

abstract:
  Available Skyrme parametrizations with hyperons are examined from the point
of view of their suitability for applications to neutron stars. It is shown
that the hyperons can attenuate or even remove the problem of ferromagnetic
instability common to (nearly) all Skyrme parametrizations of the
nucleon-nucleon interaction. At high density the results are very sensitive to
the choice of the Lambda-Lambda interaction. The selected parameter sets are
then used to obtain the resulting properties of both cold neutron stars and hot
protoneutron stars. The general features known from other models are recovered.


title:
Neutrino scattering rates in the presence of hyperons from a Skyrme
  model in the RPA approximation

abstract:
  The contribution of Lambda hyperons to neutrino scattering rates is
calculated in the random phase approximation in a model where the interaction
is described by a Skyrme potential. Finite temperature and neutrino trapping
are taken into account in view of applications to the deleptonization stage of
protoneutron star cooling. The hyperons can remove the problem of ferromagnetic
instability common to (nearly) all Skyrme parametrizations of the
nucleon-nucleon interaction. As a consequence, there is not any longer a pole
at the transition in the neutrino-baryon cross section. However there still
remains an enhancement in this region. In the absence of ferromagnetism the
mean free path in npLambda matter is reduced compared to its value in np matter
as consequence of the presence of this additional degree of freedom. At high
density the results are very sensitive to the choice of the Lambda-Lambda
interaction.


title:
Antisymmetrized Molecular Dynamics with Coherent State Pion and Its
  Application to Excited Spectrum of 12C

abstract:
  We have introduced coherent state neutral pion into Antisymmetrized Molecular
Dynamics. With the aid of coherent state technique, it becomes possible to
calculate transition matrix elements of the pion field operator and to study
excited states containing pions. For large pion-nucleon coupling fpiN > 1.6,
pions have a finite expectation value and bring large energy gain in 12C. We
discuss two aspects of pionic effects in spectroscopy; the LS interaction like
effect and the mixing of different nucleon parity states, which would modify
low energy nuclear levels.


title: Staggering behavior of 0^+ state energies in the Sp(4) pairing model

abstract:
  We explore, within the framework of an algebraic sp(4) shell model, discrete
approximations to various derivatives of the energies of the lowest
isovector-paired 0^+ states of atomic nuclei in the 40 <A < 100 mass range. The
results show that the symplectic model can be used to successfully interpret
fine structure effects driven by the proton-neutron (pn) and like-particle
isovector pairing interactions as well as interactions with higher J
multipolarity. A finite energy difference technique is used to investigate
two-proton and two-neutron separation energies, observed irregularities found
around the N=Z region, and the like-particle and pn isovector pairing gaps. A
prominent staggering behavior is observed between groups of even-even and
odd-odd nuclides. An oscillation, in addition to that associated with changes
in isospin values, that tracks with alternating seniority quantum numbers
related to the isovector pairing interaction is also found.


title: Nuclear Parity-Violation in Effective Field Theory

abstract:
  We reformulate the analysis of nuclear parity-violation (PV) within the
framework of effective field theory (EFT). To order Q, the PV nucleon-nucleon
(NN) interaction depends on five a priori unknown constants that parameterize
the leading-order, short-range four-nucleon operators. When pions are included
as explicit degrees of freedom, the potential contains additional medium- and
long-range components parameterized by PV piNN couplings. We derive the form of
the corresponding one- and two-pion-exchange potentials. We apply these
considerations to a set of existing and prospective PV few-body measurements
that may be used to determine the five independent low-energy constants
relevant to the pionless EFT and the additional constants associated with
dynamical pions. We also discuss the relationship between the conventional
meson-exchange framework and the EFT formulation, and argue that the latter
provides a more general and systematic basis for analyzing nuclear PV.


title: Inequalities for low-energy symmetric nuclear matter

abstract:
  Using effective field theory we prove inequalities for the correlations of
two-nucleon operators in low-energy symmetric nuclear matter. For physical
values of operator coefficients in the effective Lagrangian, the S = 1, I = 0
channel correlations must have the lowest energy and longest correlation length
in the two-nucleon sector. This result is valid at nonzero density and
temperature.


title: Rotational damping in a multi-$j$ shell particles-rotor model

abstract:
  The damping of collective rotational motion is investigated by means of
particles-rotor model in which the angular momentum coupling is treated exactly
and the valence nucleons are in a multi-$j$ shell mean-field. It is found that
the onset energy of rotational damping is around 1.1 MeV above yrast line, and
the number of states which form rotational band structure is thus limited. The
number of calculated rotational bands around 30 at a given angular momentum
agrees qualitatively with experimental data. The onset of rotational damping
takes place gradually as a function of excitation energy. It is shown that the
pairing correlation between valence nucleons has a significant effect on the
appearance of rotational damping.


title: Renormalization of EFT for nucleon-nucleon scattering

abstract:
  The renormalization of EFT for nucleon-nucleon scattering in nonperturbative
regimes is investigated in a compact parametrization of the $T$-matrix. The key
difference between perturbative and nonperturbative renormalization is
clarified. The underlying theory perspective and the 'fixing' of the
prescriptions for the $T$-matrix from physical boundary conditions are
stressed.


title:
A variational approach to the partition function of an interacting many
  body system

abstract:
  For the calculation of the partition function $\mathcal{Z}$ of small,
isolated and interacting many body systems an improvement with respect to
previous formulations is presented. By including anharmonicities and employing
a variational approach quantum effects can be treated even at very low
temperatures. In order to test its accuracy the novel approach is applied to
the exactly solvable Lipkin-Meshkov-Glick model (LMGM). For thermodynamic
properties and level densities good agreement with the exact calculations is
found.


title:
Damped collective motion of many body systems: A variational approach to
  the quantal decay rate

abstract:
  We address the problem of collective motion across a barrier like encountered
in fission. A formula for the quantal decay rate is derived which bases on a
recently developed variational approach for functional integrals. This formula
can be applied to low temperatures that have not been accessible within the
former PSPA type approach. To account for damping of collective motion one
particle Green functions are dressed with appropriate self-energies.


title: Chiral solitons in nuclei: Electromagnetic form factors

abstract:
  We calculate the electromagnetic form factors of a bound proton. The Chiral
Quark-Soliton model provides the quark and antiquark substructure of the
proton, which is embedded in nuclear matter. This procedure yields significant
modifications of the form factors in the nuclear environment. The sea quarks
are almost completely unaffected, and serve to mitigate the valence quark
effect. In particular, the ratio of the isoscalar electric to the isovector
magnetic form factor decreases by 20% at Q^2=1 GeV^2 at nuclear density, and we
do not see a strong enhancement of the magnetic moment.


title:
Final state interaction effects in neutrino-nucleus quasielastic
  scattering

abstract:
  We consider the charged-current quasielastic scattering of muon neutrinos on
an Oxygen 16 target, described within a relativistic shell model and, for
comparison, the relativistic Fermi gas. Final state interactions are described
in the distorted wave impulse approximation, using both a relativistic mean
field potential and a relativistic optical potential, with and without
imaginary part. We present results for inclusive cross sections at fixed
neutrino energies in the range $E_\nu =$ 200 MeV - 1 GeV, showing that final
state interaction effects can remain sizable even at large energies.


title:
Baryon Junction Loops in HIJING/B\=Bv2.0 and the Baryon/Meson Anomaly at
  RHIC

abstract:
  A new version, v2.0, of the HIJING/B\=B Monte Carlo nuclear collision event
generator is introduced in order to explore further the possible role of baryon
junctions loops in the baryon/meson anomaly (2 $< p_{T} <$ 5 GeV/c) observed in
200A GeV Au+Au reactions at RHIC. We show that junction loops with an enhanced
intrinsic $k_T\approx 1$ GeV/c transverse momentum kick may provide a partial
explanation of the anomaly as well as other important baryon stopping
observables.


title: Shell-model description of N ~ Z 1f7/2 nuclei

abstract:
  For natural parity states of several odd-A nuclei a comparison of shell model
calculations in the full pf configuration space with the Nilsson diagram and
particle-rotor predictions shows that prolate strong coupling applies at low
excitation energy, revealing multi-quasiparticle rotational bands and, in some
cases, bandcrossings. Moreover, ground state bands experience a change from
collective to non-collective regime, approaching the termination. Similar
features are observed in the even-even nuclei. In the even-even N=Z nuclei
evidence of the vibrational gamma-band is found. A review of non-natural parity
structures is furthermore presented.


title:
Analysis of the JINR p(660 MeV) + 129I, 237Np, and 241Am Measurements
  with Eleven Different Models

abstract:
  We have analyzed the recent JINR measurements on nuclide production cross
sections from interaction of 660 MeV proton beams with radioactive targets of
enriched 129I (85% 129I and 15% 127I), 237Np, and 241Am with eleven different
models, realized in eight transport codes and event-generators: LAHET (Bertini,
ISABEL, INCL+ABLA, and INCL+RAL options), CASCADE, CEM95, CEM2k, LAQGSM+GEM2,
CEM2k+GEM2, LAQGSM+GEMINI, and CEM2k+GEMINI. We found out that all these models
have problems in a correct description of many of these cross sections, though
some of these models describe very well most of the recent measurements done at
GSI using inverse kinematics, as well as many other reactions. None of the
tested here models is able to reproduce well all the JINR data and all of them
should be further improved. Development of a better universal
evaporation/fission model should be of a highest priority. We conclude that it
is impossible to make a correct choice between fission and fragmentation
reaction mechanisms analyzing only measurements on product cross sections;
addressing this question would require analysis of two- or multi-particle
correlation measurements.


title: Interaction effects in ${\bm K^+}$ photoproduction on the deuteron

abstract:
  Kaon photoproduction on the deuteron is studied with respect to a specific
two-body contribution, namely a pion mediated production process, besides other
final state interaction contributions from kaon-nucleon and hyperon-nucleon
scattering. In this process, a pion is first photoproduced on one nucleon and
then interacts with the spectator nucleon in a strangeness exchange reaction
leading to a kaon and a hyperon. A sizeable effect from this pion mediated
contribution is found, considerably larger than the previously studied
hyperon-nucleon rescattering, whereas kaon-nucleon rescattering is much less
important. Besides total and semi-inclusive differential cross sections, tensor
target asymmetries are studied with respect to the influence of such
interaction effects.


title:
Tracking energy fluctuations from fragment partitions in the Lattice Gas
  model

abstract:
  Partial energy fluctuations are known tools to reconstruct microcanonical
heat capacities. For experimental applications, approximations have been
developed to infer fluctuations at freeze out from the observed fragment
partitions. The accuracy of this procedure as well as the underlying
independent fragment approximation is under debate already at the level of
equilibrated systems. Using a well controlled computer experiment, the Lattice
Gas model, we critically discuss the thermodynamic conditions under which
fragment partitions can be used to reconstruct the thermodynamics of an
equilibrated system.


title: The meaning of S-D dominance

abstract:
  The dominance of S and D pairs in the description of deformed nuclei is one
of the facts that provided sustain to the Interacting Boson Approximation. In
Ref.(J. Dukelsky and S. Pittel, Phys. Rev. Lett. 86, 4791, 2001.), using an
exactly solvable model with a repulsive pairing interaction between bosons it
has been shown that the ground state is described almost completely in terms of
S and D bosons. In the present paper we study the excited states obtained
within this exactly solvable hamiltonian and show that in order to obtain a
rotational spectra all the other degrees of freedom are needed.


title: Pressure inequalities for nuclear and neutron matter

abstract:
  We prove several inequalities using lowest-order effective field theory for
nucleons which give an upper bound on the pressure of asymmetric nuclear matter
and neutron matter. We prove two types of inequalities, one based on convexity
and another derived from shifting an auxiliary field.


title: Correlated Emission of Hadrons from Recombination of Correlated Partons

abstract:
  We discuss different sources of hadron correlations in relativistic heavy ion
collisions. We show that correlations among partons in a quasi-thermal medium
can lead to the correlated emission of hadrons by quark recombination and argue
that this mechanism offers a plausible explanation for the dihadron
correlations in the few GeV/c momentum range observed in Au+Au collisions at
RHIC.


title: Effective field theory of the deuteron with dibaryon field

abstract:
  Pionless effective field theory with dibaryon fields is reexamined for
observables involving the deuteron. The electromagnetic form factors of the
deuteron and the total cross sections of radiative neutron capture on the
proton, $np \to d\gamma$, are calculated. The low energy constants of
vector(photon)-dibaryon-dibaryon vertices in the effective lagrangian are fixed
primarily by the one-body vector(photon)-nucleon-nucleon interactions. This
scheme for fixing the values of the low energy constants satisfactorily
reproduces the results of the effective range theory. We also show that, by
including higher order corrections, one can obtain results that are close to
those of Argonne v18 potential model.


title:
Polarization observables of the gamma d --> PiNN reaction in the
  Delta(1232)-resonance region

abstract:
  Polarization observables of the three charge states of the pion for the
$\gamma d\to\pi NN$ reaction with polarized photon beam and/or oriented
deuteron target are evaluated over the whole $\Delta$(1232)-resonance region
adopting a nonrelativistic model based on time-ordered perturbation theory.
Results for the $\pi$-meson spectra, linear photon asymmetry, vector and tensor
target asymmetries are presented. Particular attention is given, for the first
time, to double polarization asymmetries for which we present results for
$T_{20}^{\ell}$ and $T_{2\pm 2}^{\ell}$. We found that all other double
polarization asymmetries of photon and deuteron target are vanished.