title: Cluster structures within Fermionic Molecular Dynamics

abstract:
  The many-body states in an extended Fermionic Molecular Dynamics approach are
flexible enough to allow the description of nuclei with shell model nature as
well as nuclei with cluster and halo structures. Different many-body
configurations are obtained by minimizing the energy under constraints on
collective variables like radius, dipole, quadrupole and octupole deformations.
In the sense of the Generator Coordinate Method we perform variation after
projection and multiconfiguration calculations. The same effective interaction
derived from realistic interactions by means of the Unitary Correlation
Operator Method is used for all nuclei. Aspects of the shell model and cluster
nature of the ground and excited states of C12 are discussed. To understand
energies and radii of neutron-rich He isotopes the soft-dipole mode is found to
be important.


title: Recombination of Shower Partons at High $p_T$ in Heavy-Ion Collisions

abstract:
  A formalism for hadron production at high \pt in heavy-ion collisions has
been developed such that all partons hadronize by recombination. The
fragmentation of a hard parton is accounted for by the recombination of shower
partons that it creates. Such shower partons can also recombine with the
thermal partons to form particles that dominate over all other possible modes
of hadronization in the $3<p_T<8$ GeV range. The results for the high \pt
spectra of pion, kaon, and proton agree well with experiments. Energy loss of
partons in the dense medium is taken into account on the average by an
effective parameter by fitting data, and is found to be universal independent
of the type of particles produced, as it should. Due to the recombination of
thermal and shower partons, the structure of jets produced in nuclear
collisions is different from that in $pp$ collisions. The consequence on
same-side correlations is discussed.


title: Electronic stopping in astrophysical fusion reactions

abstract:
  The stopping power of protons and deuterons in low energy collisions with
helium gas targets is investigated with the numerical solution of the
time-dependent Schr\"odinger coupled-channels equations using molecular orbital
wavefunctions. It is shown that at low projectile energies the energy loss is
mainly due to nuclear stopping, charge exchange, and the excitation of low
energy levels in the target. The second and third mechanisms, called electronic
stopping, dominate for E>200 eV. At lower energies it is also shown that a
threshold effect is responsible for a quick drop of the energy loss. This
investigation sheds more light on the long standing electron screening problem
in fusion reactions of astrophysical interest.


title: A cluster version of the GGT sum rule

abstract:
  We discuss the derivation of a ``cluster sum rule'' from the
Gellmann-Goldberger-Thirring (GGT) sum rule as an alternative to the
Thomas-Reiche-Kuhn (TRK) sum rule, which was used as the basis up to now. We
compare differences in the assumptions and approximations. Some applications of
the sum rule for halo nuclei, as well as, nuclei with a pronounced cluster
structure are discussed.


title: Deformed Boson Scheme Stressing Even-Odd Boson Number Difference. III

abstract:
  A basic idea is proposed for extending the formalism of Part (II) of the
series of our paper to the case of the parameter-dependent deformation. It is
stressed that, through this extension, the variety of the application
increases. Further, an answer for the problem mentioned in Part (II) is
presented.


title: Nuclear alpha-clustering, superdeformation, and molecular resonances

abstract:
  Nuclear alpha-clustering has been the subject of intense study since the
advent of heavy-ion accelerators. Looking back for more than 40 years we are
able today to see the connection between quasimolecular resonances in heavy-ion
collisions and extremely deformed states in light nuclei. For example
superdeformed bands have been recently discovered in light N=Z nuclei such as
$^{36}$Ar, $^{40}$Ca, $^{48}$Cr, and $^{56}$Ni by $\gamma$-ray spectroscopy.
The search for strongly deformed shapes in N=Z nuclei is also the domain of
charged-particle spectroscopy, and our experimental group at IReS Strasbourg
has studied a number of these nuclei with the charged particle multidetector
array {\sc Icare} at the {\sc Vivitron} Tandem facility in a systematical
manner. Recently the search for $\gamma$-decays in $^{24}$Mg has been
undertaken in a range of excitation energies where previously nuclear molecular
resonances were found in $^{12}$C+$^{12}$C collisions. The breakup reaction
$^{24}$Mg$+^{12}$C has been investigated at E$_{lab}$($^{24}$Mg) = 130 MeV, an
energy which corresponds to the appropriate excitation energy in $^{24}$Mg for
which the $^{12}$C+$^{12}$C resonance could be related to the breakup
resonance. Very exclusive data were collected with the Binary Reaction
Spectrometer in coincidence with {\sc Euroball IV} installed at the {\sc
Vivitron}.


title:
Solution of the Skyrme-Hartree-Fock-Bogolyubov equations in the
  Cartesian deformed harmonic-oscillator basis. (IV) HFODD (v2.07f): a new
  version of the program

abstract:
  We describe the new version (v2.07f) of the code HFODD which solves the
nuclear Skyrme-Hartree-Fock or Skyrme-Hartree-Fock-Bogolyubov problem by using
the Cartesian deformed harmonic-oscillator basis. In the new version, all
symmetries can be broken, which allows for calculations with angular frequency
and angular momentum tilted with respect to the mass distribution. The new
version contains an interface to the LAPACK subroutine ZHPEVX.


title: The stopping of low energy ions in reactions of astrophysical interest

abstract:
  he velocity dependence of the stopping power of swift protons and deuterons
in low energy collisions with hydrogen and helium gas targets is investigated
with the numerical solution of the time-dependent Schroedinger coupled-channels
equations using molecular orbital wavefunctions. At low projectile energies the
stopping is mainly due to nuclear stopping, charge exchange of the electron,
and excitation of the lowest levels in the target. The second and third
mechanisms dominate at E < 200 eV. At lower energies it is also shown that a
threshold effect is responsible for a quick drop of the energy loss. This
investigation sheds more light on the long standing electron screening problem
in fusion reactions of astrophysical interest.


title: Statistical and Dynamic Models of Charge Balance Functions

abstract:
  Charge balance functions, which identify balancing particle-antiparticle
pairs on a statistical basis, have been shown to be sensitive to whether
hadronization is delayed by several fm/c in relativistic heavy ion collisions.
Results from two classes of models are presented here, microscopic hadronic
models and thermal models. The microscopic models give results which are
contrary to recently published pi+pi- balance functions from the STAR
collaboration, whereas the thermal model roughly reproduce the experimental
results. This suggests that charge conservation is local at breakup, which is
in line with expectations for a delayed hadronization. Predictions are also
presented for balance functions binned as a function of Q_inv.


title:
Nonextensive quantum statistics and saturation of the PMD-SQS optimality
  limit in hadron-hadron scattering

abstract:
  In this paper, new results on the analysis in hadron-hadron scattering are
obtained by using the nonextensive quantum entropy and principle of minimum
distance in the space of quantum states (PMD-SQS). Using Tsallis-like
scattering entropies, the optimality as well as the nonextensive statistical
behavior of the quantum scattering systems are investigated in an unified
manner. A connection between optimal states obtained from the principle of
minimum distance in the space of quantum states and the most stringent (MaxEnt)
entropic bounds on Tsallis-like entropies for quantum scattering, is
established. The generalized entropic uncertainty relations as well as the
correlation between the nonextensivities p and q of the scattering statistics
are proved. New results on the experimental tests of the saturation of the
optimality limit}, as well as on the test of optimal entropic bands obtained by
using the experimental pion-nucleon, kaon-nucleon, antikaon-nucleon phase
shifts, are presented. The nonextensivity indices p and q are determined from
the experimental entropies by a fit with the optimal entropies obtained from
the principle of minimum distance in the space of states. Strong experimental
evidences for the p-nonextensivity index in the range p=0.6 with q=p/(2p-1)=3,
is obtained from the experimental data.


title:
Rescattering Contributions to Final State Interactions in (e,e'p)
  Reactions at High (p_m,E_m)

abstract:
  The contribution of rescattering to final state interactions in the (e,e'p)
cross section is studied using a semiclassical model. This approach considers a
two-step process with the propagation of an intermediate nucleon and uses
Glauber theory to account for the reduction of the experimental yield due to
N--N scattering. This calculation has relevance for the analysis of data at
high missing energies and in particular at the kinematics of the E97-006
experiment done at JLab. It is found that rescattering is strongly reduced in
parallel kinematics and that the excitation of nucleon resonances is likely to
give important contributions to the final state interactions in the correlated
region. For heavy nuclei, further enhancement to the rescattering is expected
to be generated from the strength in the mean field region.


title:
Exploring binding energy and separation energy dependences of HBT
  strength

abstract:
  Hanbury Brown-Twiss (HBT) results of the nucleon-nucleon correlation function
have been presented for the nuclear reactions with neutron-rich projectiles (Be
isotopes) using an event-generator, the Isospin-Dependent Quantum Molecular
Dynamics model. We explore that the relationship between the binding energy per
nucleon of the projectiles and the strength of the neutron-proton HBT at small
relative momentum. Moreover, we reveal the relationship between the single
neutron separation energy and the strength of the halo neutron-proton HBT.
Results show that neutron-proton HBT results are sensitive to binding energy or
separation energy.


title: Reaction dynamics for fusion of weakly-bound nuclei

abstract:
  We discuss several open problems of fusion reactions induced by weakly bound
nuclei. For this purpose, we solve a one dimensional three-body Hamiltonian
with the coupled-channels formalism. We show that the continuum-continuum
couplings substantially reduce the total fusion probability at energies above
the barrier compared with the no-breakup case, although the fusion probability
remains enhanced at subbarrier energies. We then discuss a role of transfer
process in fusion of weakly bound nuclei, and point out that removing spurious
Pauli forbidden transfer components from the calculation may be crucial at
energies below the barrier. Calculations based on the three-body classical
trajectory Monte Carlo (CTMC) method are also presented in order to discuss how
to model complete fusion process.


title: Supergiant halos as an integral record of natural pionic radioactivity

abstract:
  In this paper an unified interpretation of the supergiant halos (SGH),
discovered by Grady, Walker and Laemmlein, is discussed. So, it is proved that
SGH`s can be considered as integral records of the nuclear pionic
radioactivity.


title: Meson retardation in deuteron electrodisintegration

abstract:
  The effect of meson retardation in $NN$-interaction and exchange currents on
deuteron electrodisintegration is studied in a coupled channel approach
including $NN$-, $N \Delta$- and $\pi d$-channels. It is shown that the
influence of retardation depends on the energy regime: Whereas below
$\pi$-threshold calculations with static and retarded operators yield almost
identical results, they differ significantly in the $\Delta$-region.
Especially, the longitudinal and the longitudinal-transverse interference
structure functions are strongly affected.


title:
Sum rules and short-range correlations in nuclear matter at finite
  temperature

abstract:
  The nucleon spectral function in nuclear matter fulfills an energy weighted
sum rule. Comparing two different realistic potential, these sum rules are
studied for Green's functions that are derived self-consistently within the $T$
matrix approximation at finite temperature.


title: Neutron Matter: A Superfluid Gas

abstract:
  We review recent progress in the theory of neutron matter with particular
emphasis on its superfluid properties. Results of quantum Monte Carlo
calculations of simple and realistic models of uniform superfluid neutron gas
are discussed along with those of neutrons interacting in a potential well
chosen to approximate neutron-rich oxygen isotopes. The properties of dilute
superfluid Fermi gases that may be produced in atom traps, and their relations
with neutron matter, are illustrated. The density dependence of the effective
interaction between neutrons, used to describe neutron-rich systems with the
mean field approximations, is also discussed.


title: Analysis of Hadronic Properties at SPS energies from a Statistical Model

abstract:
  Using a statistical model of multiparticle production by Chou, Yang and Yen,
which looks similar to the thermal model and is known to account for the single
particle distributions in e$^+$ e$^-$ collisions, we fit the rapidity and
transverse mass spectra of pions and kaons measured in Pb+Pb collisions by NA49
collaboration. This model nicely fits both the rapidity and the transverse mass
spectra of each particle species with a few parameters. However, fitting all
the particles with a single value of $T_p$ is not possible. This analysis shows
that the success of the thermal models does not necessarily mean the
thermalization of the system in collision.


title:
A Possible Extension of a Trial State in the TDHF Theory with Canonical
  Form in the Lipkin Model

abstract:
  With the aim of the extension of the TDHF theory in the canonical form in the
Lipkin model, the trial state for the variation is constructed, which is an
extension of the Slater determinant. The canonicity condition is imposed to
formulate the variational approach in the canonical form. A possible solution
of the canonicity condition is given and the zero-point fluctuation induced by
the uncertainty principle is investigated. As an application, the ground state
energy is evaluated.


title:
Fermionic Squeezed State for Simple Algebraic Models in Many-Fermion
  Systems

abstract:
  It is shown that a variational approach with fermionic squeezed states to
many-fermion systems such as pairing model is one of useful methods beyond the
usual Hartree-Fock-Bogoliubov approximation. A pairing-type quasi-spin squeezed
state is constructed and adopted as a trial state in the variational method. By
using this state, quantum fluctuations are taken into account. In pairing
model, dynamical and static approaches are discussed in the context of
comparing with the Hartree-Fock-Bogoliubov approximation about ground state
energy. As a possible extension to the O(4) model, prospective squeezed states
are investigated and the usefulness is discussed.


title: Giant dipole resonance with exact treatment of thermal fluctuations

abstract:
  The shape fluctuations due to thermal effects in the giant dipole resonance
(GDR) observables are calculated using the exact free energies evaluated at
fixed spin and temperature. The results obtained are compared with Landau
theory calculations done by parameterizing the free energy. The Landau theory
is found to be insufficient when the shell effects are dominating.


title:
The island of deformation and shape co-existence in neutron-deficient
  nuclei of the Pb region using relativistic mean field model

abstract:
  We have investigated the ground-state structures of even-even
neutron-deficient isotopes of Hg and Pb nuclei within the framework of a
deformed relativistic mean field formalism for a number of commonly used
parameter sets, namely NL1, NL3, NL-SH, NL-RA1 and TM1. The ground states of a
bunch of Hg and Pb-isotopes towards the proton-dripline are found to be
deformed for all the forces, with a constant pairing gap. The small differences
in the ground- and the first-excited state binding energies predict a sea of
low-lying excited states, and hence of shape co-existence, for both the Hg and
Pb nuclei. In general, a discrepancy between the experimentally observed and
theoretically predicted (sign of) quadrupole deformations is noticed in this
mass region. The constrained potential energy surfaces and the single-particle
energy spectra analyzed for some selected nuclei show that the known large
shell gap for Pb nuclei at Z=82 is almost extinguished for its proton-rich
isotopes.


title: Medium effects on meson couplings and dilepton spectra

abstract:
  The pi omega rho coupling constant is calculated in a relativistic hadronic
framework incorporating nucleons and Delta(1232) isobars. Medium modifications
are included. The vertex is analyzed in context of the omega to pi e+e- and rho
to pi e+e- Dalitz decays in nuclear matter. A sizeable increase of the widths
for these decays is found for invariant mass of dileptons in the range 0.2-0.5
GeV. This increase may help, among other medium effects, to explain the problem
of the low-mass dilepton enhancement seen in relativistic heavy-ion collisions.


title: The optical model of $N\bar{N}$ interaction without cut-off

abstract:
  We suggest a regular potential model of $N\bar{N}$ interaction without any
cut-off. The effect of singular terms of OBE potential, modified by
annihilation is shown to be repulsive. The experimental data for S- and P-wave
scattering lengths are well reproduced.


title: Mean field and pairing properties in the crust of neutron stars

abstract:
  Properties of the matter in the inner crust of a neutron star are
investigated in a Hartree-Fock plus BCS approximation employing schematic
effective forces of the type of the Skyrme forces. Special attention is paid to
differences between a homogenous and inhomogeneous description of the matter
distribution. For that purpose self-consistent Hartree Fock calculations are
performed in a spherical Wigner-Seitz cell. The results are compared to
predictions of corresponding Thomas Fermi calculations. The influence of the
shell structure on the formation of pairing correlations in inhomogeneous
matter are discussed.


title:
$J/\psi$ Gluonic Dissociation Revisited : I. Fugacity, Flux And
  Formation Time Effects

abstract:
  We revisit the standard treatment [Xu, Kharzeev, Satz and Wang, Phys. Rev. C
{\bf 53}, 3051 (1996)] of $J/\psi$ suppression due to gluonic bombardment in an
equilibrating quark-gluon plasma. Effects arising from gluon fugacity, relative
$g-\psi$ flux, and $\psi$ meson formation time are correctly incorporated in
the formulation of the gluon number density, velocity-weighted cross section,
and the survival probability. Our new formulae are applied to numerically study
the pattern of $J/\psi$ suppression in the central rapidity region at RHIC/LHC
energies. The temperature and transverse momentum dependence of our graphs have
noticeable differences from those of Xu et al.


title: Fusion and breakup in the reactions of 6,7Li and 9Be

abstract:
  We develop a three body classical trajectory Monte Carlo (CTMC) method to
dicsuss the effect of the breakup process on heavy-ion fusion reactions induced
by weakly bound nuclei. This method follows the classical trajectories of
breakup fragments after the breakup takes place, and thus provides an
unambiguous separation between complete and incomplete fusion cross sections.
Applying this method to the fusion reaction $^{6}$Li + $^{209}$Bi, we find that
there is a significant contribution to the total complete fusion cross sections
from the process where all the breakup fragments are captured by the target
nucleus (i.e., the breakup followed by complete fusion).


title:
Gamma-radiation as a Signature of Ultra Peripheral Ion Collisions at LHC
  energies

abstract:
  We study the peripheral ion collisions at LHC energies in which a nucleus is
excited to the discrete state and then emits $\gamma$-rays. Large nuclear
Lorenz factor allows to observe the high energy photons up to a few ten GeV and
in the region of angles of a few hundred micro-radians around the beam
direction. These photons can be used for tagging the events with particle
production in the central rapidity region in the ultra-peripheral collisions.
For that it is necessary to have an electromagnetic detector in front of the
zero degree calorimeter in the LHC experiments.


title:
New results for the two neutrino double beta decay in deformed nuclei
  with angular momentum projected basis

abstract:
  Four nuclei which are proved to be $2\nu\beta\beta$ emitters ($^{76}$Ge,
$^{82}$Se, $^{150}$Nd, $^{238}$U), and four suspected, due to the corresponding
Q-values, to have this property ($^{148}$Nd, $^{154}$Sm, $^{160}$Gd,
$^{232}$Th), were treated within a proton-neutron quasiparticle random phase
approximation (pnQRPA) with a projected spherical single particle basis. The
advantage of the present procedure over the ones using a deformed Woods Saxon
or Nilsson single particle basis is that the actual pnQRPA states have a
definite angular momentum while all the others provide states having only K as
a good quantum number. The model Hamiltonian involves a mean field term
yielding the projected single particle states, a pairing interaction for alike
nucleons and a dipole-dipole proton-neutron interaction in both the
particle-hole (ph) and particle-particle (pp) channels. The effect of nuclear
deformation on the single beta strength distribution as well as on the double
beta Gamow-Teller transition amplitude (M$_{{\rm GT}}$) is analyzed. The
results are compared with the existent data and with the results from a
different approach, in terms of the process half life T$_{1/2}$. The case of
different deformations for mother and daughter nuclei is also presented.


title: Electromagnetic Form Factors in the hypercentral CQM

abstract:
  We report on the recent results of the hypercentral Constituent Quark Model
(hCQM). The model contains a spin independent three-quark interaction which is
inspired by Lattice QCD calculations and reproduces the average energy values
of the SU(6) multiplets. The splittings are obtained with a SU(6)-breaking
interaction, which can include also an isospin dependent term. Concerning
Constituent Quark models, we have shown for the first time that the decreasing
of the ratio of the elastic form factors of the proton is due to relativistic
effects using relativistic corrections to the e.m. current and boosts. Now the
elastic nucleon form factors have been recalculated, using a relativistic
version of the hCQM and a relativistic quark current showing a very detailed
reproduction of all the four form factor existing data over the complete range
of 0-4 $GeV^2$. Futhermore, the model has been used for predictions concerning
the electromagnetic transverse and longitudinal transition form factors giving
a good description of the medium $Q^2$ behaviour. We show that the
discrepancies in the reproduction of the helicity amplitudes at low $Q^2$ are
due to pion loops. We have calculated the helicity amplitudes for all the 3 and
4 star resonances opening the possibility of application to the evaluation of
cross sections.


title:
Consistent analysis of the reaction $\gamma p \to p \eta^\prime$ and $pp
  \to pp\eta^\prime$

abstract:
  The production of $\eta'$ mesons in the reactions $\gamma p\to p\eta'$ and
$pp\to pp\eta'$ is described consistently within a relativistic meson exchange
model of hadronic interactions. The photoproduction can be described quite well
over the entire energy range of available data by considering an $S_{11}$ and a
$P_{11}$ resonance, in addition to the $t$-channel mesonic current. The
observed angular distribution is due to the interference between the
$t$-channel and the nucleon resonance $s$- and $u$-channel contributions. Our
analysis yields positions close to 1650 MeV and 1870 MeV for the $S_{11}$ and
$P_{11}$ resonances, respectively. We argue that, at present, identifying these
states with the known $S_{11}(1650)$ resonance and the missing $P_{11}$
resonance predicted at 1880 MeV, respectively, would be premature. It is found
that the nucleonic current is relatively small and that the $NN\eta^\prime$
coupling constant cannot be much larger than $g_{NN\eta^\prime}=3$. As for the
$p p \to p p \eta^\prime$ reaction, different current contributions are
constrained by a combined analysis of this and the photoproduction reaction.
Difficulties to simultaneously account for the 47-MeV and 144-MeV angular
distributions measured by the COSY-11 and DISTO collaborations, respectively,
are addressed.


title: Review of QGP signatures - ideas versus observables

abstract:
  We investigate hadron production and transverse hadron spectra in
nucleus-nucleus collisions from 2 $A\cdot$GeV to 21.3 $A\cdot$TeV within two
independent transport approaches (UrQMD and HSD) based on quark, diquark,
string and hadronic degrees of freedom. The enhancement of pion production in
central Au+Au (Pb+Pb) collisions relative to scaled $pp$ collisions (the
'kink') is described well by both approaches without involving a phase
transition. However, the maximum in the $K^+/\pi^+$ ratio at 20 to 30
A$\cdot$GeV (the 'horn') is missed by $\sim$ 40%. Also, at energies above
$\sim$ 5 A$\cdot$GeV, the measured $K^{\pm}$ $m_{T}$-spectra have a larger
inverse slope than expected from the models. Thus the pressure generated by
hadronic interactions in the transport models at high energies is too low. This
finding suggests that the additional pressure - as expected from lattice QCD at
finite quark chemical potential and temperature - might be generated by strong
interactions in the early pre-hadronic/partonic phase of central heavy-ion
collisions. Finally, we discuss the emergence of density perturbations in a
first-order phase transition and why they might affect relative hadron
multiplicities, collective flow, and hadron mean-free paths at decoupling.


title:
Jastrow Two-nucleon Overlap Functions and Cross Sections of
  $^{16}$O$(e,e^{\prime}NN)^{14}$C Reactions

abstract:
  Using the relationship between the two-particle overlap functions (TOF's) and
the two-body density matrix (TDM), the TOF's for
$^{16}$O$(e,e^{\prime}pp)^{14}$C reaction are calculated on the basis of TDM
obtained with a Jastrow-type approach. The main contributions of the removal of
$^1S$ and $^3P$ $pp$-pairs from $^{16}$O are taken into account in the
calculations of the cross sections of the $^{16}$O$(e,e^{\prime}pp)^{14}$C
reaction using the Jastrow TOF's. The contributions of the one-body and
two-body delta currents are considered. The results are compared with the
calculations using TOF's from other approaches.


title:
Electroproduction, photoproduction, and inverse electroproduction of
  pions in the first resonance region

abstract:
  Methods are set forth for determining the hadron electromagnetic structure in
the sub-$N\bar{N}$-threshold timelike region of the virtual-photon ``mass'' and
for investigating the nucleon weak structure in the spacelike region from
experimental data on the process $\pi N\to e^+e^- N$ at low energies. These
methods are formulated using the unified description of photoproduction,
electroproduction, and inverse electroproduction of pions in the first
resonance region in the framework of the dispersion-relation model and on the
basis of the model-independent properties of inverse electroproduction.
Applications of these methods are also shown.


title: Structure of Exotic Nuclei

abstract:
  The progress in the modeling of exotic nuclei with an extreme
neutron-to-proton ratio is discussed. Two topics are emphasized: (i) the quest
for the universal microscopic nuclear energy density functional and (ii) the
progress in the continuum shell model.


title: Quark-mass dependence of baryon resonances

abstract:
  We study the quark-mass dependence of J^P = \frac12^- s-wave and J^P =
\frac32^- d-wave baryon resonances. Parameter-free results are obtained in
terms of the leading order chiral Lagrangian. In the 'heavy' SU(3) limit with
m_\pi =m_K \simeq 500 MeV the s-wave resonances turn into bound states forming
two octets plus a singlet representations of the SU(3) group. Similarly the
d-wave resonances turn into bound states forming an octet and a decuplet in
this limit. A contrasted result is obtained in the 'light' SU(3) limit with
m_\pi =m_K \simeq 140 MeV for which no resonances exist.


title: Gamow Shell-Model Description of Weakly Bound and Unbound Nuclear States

abstract:
  Recently, the shell model in the complex k-plane (the so-called Gamow Shell
Model) has been formulated using a complex Berggren ensemble representing bound
single-particle states, single-particle resonances, and non-resonant continuum
states. In this framework, we shall discuss binding energies and energy spectra
of neutron-rich helium and lithium isotopes. The single-particle basis used is
that of the Hartree-Fock potential generated self-consistently by the
finite-range residual interaction.


title: Enhancement of kinetic energy fluctuations due to expansion

abstract:
  Global equilibrium fragmentation inside a freeze out constraining volume is a
working hypothesis widely used in nuclear fragmentation statistical models. In
the framework of classical Lennard Jones molecular dynamics, we study how the
relaxation of the fixed volume constraint affects the posterior evolution of
microscopic correlations, and how a non-confined fragmentation scenario is
established. A study of the dynamical evolution of the relative kinetic energy
fluctuations was also performed. We found that asymptotic measurements of such
observable can be related to the number of decaying channels available to the
system at fragmentation time.


title:
Random interactions in nuclei and extension of $0^+$ dominance in ground
  states to irreps of group symmetries

abstract:
  Random one plus two-body hamiltonians invariant with respect to $O({\cal
N}_1) \oplus O({\cal N}_2)$ symmetry in the group-subgroup chains $U({\cal N})
\supset U({\cal N}_1) \oplus U({\cal N}_2) \supset O({\cal N}_1) \oplus O({\cal
N}_2)$ and $U({\cal N}) \supset O({\cal N}) \supset O({\cal N}_1) \oplus
O({\cal N}_2)$ chains of a variety of interacting boson models are used to
investigate the probability of occurrence of a given $(\omega_1 \omega_2)$
irreducible representation (irrep) to be the ground state in even-even nuclei;
$[\omega_1]$ and $[\omega_2]$ are symmetric irreps of $O({\cal N}_1)$ and
$O({\cal N}_2)$ respectively. Numerical results obtained for ${\cal N}_1 \geq
3, {\cal N}_2=1$ and ${\cal N}_1, {\cal N}_2 \geq 3$ situations are well
explained by an extended Hartree-Bose mean-field analysis.


title: Nucleon QCD sum rules in nuclear matter including four-quark condensates

abstract:
  We calculate the nucleon parameters in nuclear matter using the QCD sum rules
approach in Fermi gas approximation. Terms up to 1/q^2 in the operator product
expansion (OPE) are taken into account. The higher moments of the nucleon
structure functions are included. The complete set of the nucleon expectation
values of the four-quark operators is employed. Earlier the lack of information
on these values has been the main obstacle for the further development of the
approach. We show that the four-quark condensates provide the corrections of
the order 20% to the results obtained in the leading orders of the OPE. This is
consistent with the assumption about the convergence of the OPE. The nucleon
vector self-energy \Sigma_v and the nucleon effective mass m^* are expressed in
terms of the in-medium values of QCD condensates. The numerical results for
these parameters at the saturation value of the density agree with those
obtained by the methods of nuclear physics.


title: Nuclear quantum transport for barrier problems

abstract:
  A method is presented which allows one to introduce collective coordinates
self-consistently, in distinction to the Caldeira-Leggett model. It is
demonstrated how the partition function Z for the total nuclear system can be
calculated to deduce information both on its level density as well as on the
decay rate of unstable modes. For the evaluation of Z different approximations
are discussed. A recently developed variational approach turns out superior to
the conventional methods that include quantum effects on the level of local
RPA. Dissipation is taken into account by applying energy smearing, simulating
in this way the coupling to more complicated states. In principle, such a
coupling must depend on temperature. Previous calculations along another
microscopic approach show this fact to imply an intriguing variation of the
transport coefficients of collective motion with T. The relevance of this
feature is demonstrated for the thermal fission rate and for the formation
probability of super-heavy elements.


title: Nuclear transparencies in relativistic A(e,e'p) models

abstract:
  Relativistic and unfactorized calculations for the nuclear transparency
extracted from exclusive A(e,e'p) reactions for 0.3 \leq Q^2 \leq 10 (GeV/c)^2
are presented for the target nuclei C, Si, Fe and Pb. For Q^2 \geq 0.6
(GeV/c)^2, the transparency results are computed within the framework of the
recently developed relativistic multiple-scattering Glauber approximation
(RMSGA). The target-mass and Q^2 dependence of the RMSGA predictions are
compared with relativistic distorted-wave impulse approximation (RDWIA)
calculations. Despite the very different model assumptions underlying the
treatment of the final-state interactions in the RMSGA and RDWIA frameworks,
they predict comparable nuclear transparencies for kinematic regimes where both
models are applicable.


title: Low-energy pi pi photoproduction off nuclei

abstract:
  In the present paper we investigate pi0 pi0 and pi(+/-)pi0 photoproduction
off complex nuclei at incident beam energies of 400-460 MeV. Simulations of two
pion photoproduction on protons and nuclei are performed by means of a
semi-classical BUU transport model including a full coupled-channel treatment
of the final state interactions. Elastic scattering of the final state pions
with the nucleons in the surrounding nuclear medium is found to yield a
downward shift of the pi pi invariant mass distribution. We show that the
target mass dependence of the pi0 pi0 invariant mass spectrum as measured by
the TAPS collaboration can be explained without introducing medium effects
beyond absorption and quasi-elastic scattering of the final state particles. On
the other hand, we find considerable discrepancies with the data in the
pi(+/-)pi0 channel, which are not understood.


title: Quantum-tail effect in low energy d+d reaction in deuterated metals

abstract:
  The Bochum experimental enhancement of the d+d fusion rate in a deuterated
metal matrix at low incident energies is explained by the quantum broadening of
the momentum-energy dispersion relation and consequent modification of the
high-momentum tail of the distribution function from an exponential to a
power-law.


title: Quantum calculations of Coulomb reorientation for sub-barrier fusion

abstract:
  Classical mechanics and Time Dependent Hartree-Fock (TDHF) calculations of
heavy ions collisions are performed to study the rotation of a deformed nucleus
in the Coulomb field of its partner. This reorientation is shown to be
independent on charges and relative energy of the partners. It only depends
upon the deformations and inertias. TDHF calculations predict an increase by
30% of the induced rotation due to quantum effects while the nuclear
contribution seems negligible. This reorientation modifies strongly the fusion
cross-section around the barrier for light deformed nuclei on heavy collision
partners. For such nuclei a hindrance of the sub-barrier fusion is predicted.


title: Present Status of the Theory of Fission of hot Nuclei

abstract:
  Recent progress in the theory of fission of hot nuclei is reported. We
discuss in particular the properties of the friction formfactor as function of
the deformation (and possibly of the temperature) which are necessary to
reproduce data concerning fission of hot nuclei and its accompanying light
particle and $\gamma$-ray emission. Recent theoretical work gives support to a
phenomenological friction form factor (proposed some time ago), which is weak
for compact shapes and increases on the way to scission.


title:
Nonequilibrium Quantum-Field Dynamics and Off-Shell Transport for
  $\phi^4$-theory in 2+1 dimensions

abstract:
  We solve the Kadanoff-Baym equations for nonequilibrium initial
configurations of the $\phi^4$-theory in 2+1 dimensions and compare to explicit
solutions of generalized transport equations for the same theory. The latter
transport equations are derived from the Kadanoff-Baym equation in a first
order gradient expansion in phase space and explicitly retain the off-shell
dynamics as inherent in the time-dependent spectral functions. The solutions of
these equations compare very well with the exact solutions of the full
Kadanoff-Baym equations with respect to the occupation numbers of the
individual modes, the spectral evolution as well as the chemical equilibration
process. Furthermore, the proper equilibrium off-shell distribution is reached
for large times contrary to the quasiparticle Boltzmann limit. We additionally
present a direct comparison of the solution of the generalized transport
equations in the Kadanoff-Baym and Botermans-Malfliet form; both solutions are
found to agree very well with each other.


title: Extrapolation Method for the No-Core Shell Model

abstract:
  Nuclear many-body calculations are computationally demanding. An estimate of
their accuracy is often hampered by the limited amount of computational
resources even on present-day supercomputers. We provide an extrapolation
method based on perturbation theory, so that the binding energy of a large
basis-space calculation can be estimated without diagonalizing the Hamiltonian
in this space. The extrapolation method is tested for 3H and 6Li nuclei. It
will extend our computational abilities significantly and allow for reliable
error estimates.


title:
Deducing the asymptotic normalization constant of the 2+ subthreshold
  state in 16O from 12C + alpha elastic scattering

abstract:
  R-matrix analyses of the 12C + alpha elastic-scattering phase shifts deduced
from a recent high-precision measurement of the differential cross sections are
performed. The l=0 phase shifts constrain the R-matrix radius a around 5.85 fm,
while the l=2 phase shifts lead to a strong constrain neither on a nor on the
asymptotic normalization constant C of the 2+ subthreshold state (except for a
loose upper limit). This contradicts previous R-matrix analyses of the 12C +
alpha elastic scattering and explains the incompatibility between values of C
obtained in these analyses.


title: On the practical interest of one-body overlap functions

abstract:
  Two types of one-body functions extracted from microscpic models of the 8B
ground state are compared with one another and with a potential-model wave
function. The one-body overlap function seems to have the strongest physical
meaning.


title:
The stability of the relativistic three-body system and in-medium
  equations

abstract:
  We present a relativistic three-body equation to study the stability of the
isolated three-body system and the correlations in a medium of finite
temperatures and densities. Relativity is implemented utilizing the light front
form. Using a zero-range force we find the relativistic analog of the Thomas
collapse and investigate the possibility that the nucleon exists as a Borromean
system. Within a systematic Dyson equation approach we calculate the three-body
Mott transition and the critical temperature of the color-superconducting
phase.


title: Photoproduction of $K^*$ for the study of $\Lambda(1405)$

abstract:
  The photo-induced $K^*$ vector meson production is investigated for the study
of the $\Lambda(1405)$ resonance. This reaction is particularly suited to the
isolation of the second pole in the $\Lambda(1405)$ region which couples
dominantly to the $\bar K N$ channel. We obtain the mass distribution of the
$\Lambda(1405)$ which peaks at 1420 MeV, and differs from the nominal one.
Combined with several other reactions, like the $\pi^- p \to K^0 \pi \Sigma$
which favours the first pole, this detailed study will reveal a novel structure
of the $\Lambda(1405)$ state.


title:
Effects of color superconductivity on the structure and formation of
  compact stars

abstract:
  We show that if color superconducting quark matter forms in hybrid or quark
stars it is possible to satisfy most of recent observational boundaries on
masses and radii of compact stellar objects. An energy of the order of
$10^{53}$ erg is released in the conversion from a (metastable) hadronic star
into a (stable) hybrid or quark star in presence of a color superconducting
phase. If the conversion occurs immediately after the deleptonization of the
proto-neutron star, the released energy can help Supernovae to explode. If the
conversion is delayed the energy released can power a Gamma Ray Burst. A delay
between the Supernova and the subsequent Gamma Ray Burst is possible, in
agreement with the delay proposed in recent analysis of astrophysical data.


title:
Local density and the RPA corrections in charge current quasielastic
  neutrino on Oxygen, Argon and Iron scattering

abstract:
  Numerical computations of cross sections for quasielastic charge current
scattering of neutrino on Oxygen, Argon and Iron in Local Density Approximation
(LDA) are presented. We consider processes for a few GeV neutrino energy. We
include corrections from nucleon re-interaction in nucleus described by
relativistic Random Phase Approximation (RPA). We adopt the relativistic Fermi
gas model of nucleus with and without taking into account the effective mass of
nucleons.


title: Theory of the Trojan-Horse Method

abstract:
  The Trojan-Horse method is an indirect approach to determine the energy
dependence of S factors of astrophysically relevant two-body reactions. This is
accomplished by studying closely related three-body reactions under quasi-free
scattering conditions. The basic theory of the Trojan-Horse method is developed
starting from a post-form distorted wave Born approximation of the T-matrix
element. In the surface approximation the cross section of the three-body
reaction can be related to the S-matrix elements of the two-body reaction. The
essential feature of the Trojan-Horse method is the effective suppression of
the Coulomb barrier at low energies for the astrophysical reaction leading to
finite cross sections at the threshold of the two-body reaction. In a modified
plane wave approximation the relation between the two-body and three-body cross
sections becomes very transparent. Applications of the Trojan Horse Method are
discussed. It is of special interest that electron screening corrections are
negligible due to the high projectile energy.


title:
Raynal's use of the word "aberrant" appears more appropriate for his
  ECIS formulation

abstract:
  Recently, we published a paper (Nucl. Phys. A 728 (2003) 65; see
nucl-th/0306068) presenting a new calculational method for nucleon-nucleus
elastic scattering at low energies. That method is particularly appropriate for
analyses in the region of narrow resonances. The method is based upon the
sturmian representation of the S-matrix, and allows inclusion of nonlocality
effects due to Pauli principle. It also provides a systematic identification of
narrow-resonance spectra and subthreshold bound states. A phenomenological test
calculation for low-energy (below 4 MeV) neutrons on 12-C (including the first
two excitations of the target) was presented to illustrate the validity of the
approach. The model calculation received a violent criticism (see
nucl-th/0312038) by the developer of a method (ECIS) which to date cannot
handle nonlocality effects and cannot be used easily to identify all narrow
resonances. We demonstrate that Raynal's opposition to our development is not
well founded by the arguments he presents. Indeed the work we published shows,
on rewording the title of nucl-th/0312038, that it is ``aberrant''
phenomenologically to analyze resonant low-energy nucleon-nucleus processes
with coupled-channel methods without taking into account the nonlocalities due
to the Pauli principle; problems typically encountered in the ECIS formulation.


title:
Vacuum creation of quarks at the time scale of QGP thermalization and
  strangeness enhancement in heavy-ion collisions

abstract:
  The vacuum parton creation in quickly varying external fields is studied at
the time scale of order 1 fm/$c$ typical for the quark-gluon plasma formation
and thermalization. To describe the pre-equilibrium evolution of the system the
transport kinetic equation is employed. It is shown that the dynamics of
production process at times comparable with particle inverse masses can deviate
considerably from that based on classical Schwinger-like estimates for
homogeneous and constant fields. One of the effects caused by non-stationary
chromoelectric fields is the enhancement of the yield of $s\bar{s}$ quark
pairs. Dependence of this effect on the shape and duration of the field pulse
is studied together with the influence of string fusion and reduction of quark
masses.


title:
Surface tension in a compressible liquid-drop model: Effects on nuclear
  density and neutron skin thickness

abstract:
  We examine whether or not the surface tension acts to increase the nucleon
density in the nuclear interior within a compressible liquid-drop model. We
find that it depends on the density dependence of the surface tension, which
may in turn be deduced from the neutron skin thickness of stable nuclei.


title: Five-Dimensional Fission-Barrier Calulations from Se-70 to Cf-252

abstract:
  We present fission-barrier-height calculations for nuclei throught the
Periodic Table based on a realistic macroscopic-microscopic model. Compared to
other calculations: (1) we use a deformation space of sufficiently high
dimension, sampled densely enough to describe the relevant topography of the
fission potential, (2) we unambiguously find the physically relevant saddle
points in this space, and (3) we formulate our model so that we obtain
continuity of the potential energy at the division point between a single
system and separated fission fragments or colliding nuclei, allowing us to (4)
describe both fission-barrier heights and ground-state masses throughout the
Periodic Table.


title: Addendum: Attenuation of the intensity within a superdeformed band

abstract:
  We investigate a random matrix model [Phys. Rev. C {\bf 65} 024302 (2002] for
the decay-out of a superdeformed band as a function of the parameters:
$\Gamma^\downarrow/\Gamma_S$, $\Gamma_N/D$, $\Gamma_S/D$ and $\Delta/D$. Here
$\Gamma^\downarrow$ is the spreading width for the mixing of an SD state $|0>$
with a normally deformed (ND) doorway state $|d>$, $\Gamma_S$ and $\Gamma_N$
are the electromagnetic widths of the the SD and ND states respectively, $D$ is
the mean level spacing of the compound ND states and $\Delta$ is the energy
difference between $|0>$ and $|d>$. The maximum possible effect of an
order-chaos transition is inferred from analytical and numerical calculations
of the decay intensity in the limiting cases for which the ND states obey
Poisson and GOE statistics. Our results show that the sharp attenuation of the
decay intensity cannot be explained solely by an order-chaos transition.


title:
Boundary Conditions of the Hydro-Cascade Model and Relativistic Kinetic
  Equations for Finite Domains

abstract:
  A detailed analysis of the coupled relativistic kinetic equations for two
domains separated by a hypersurface having both space- and time-like parts is
presented. Integrating the derived set of transport equations, we obtain the
correct system of the hydro+cascade equations to model the relativistic nuclear
collision process. Remarkably, the conservation laws on the boundary between
domains conserve separately both the incoming and outgoing components of
energy, momentum and baryonic charge. Thus, the relativistic kinetic theory
generates twice the number of conservation laws compared to traditional
hydrodynamics. Our analysis shows that these boundary conditions between
domains, the three flux discontinuity, can be satisfied only by a special
superposition of two cut-off distribution functions for the ``out'' domain. All
these results are applied to the case of the phase transition between quark
gluon plasma and hadronic matter. The possible consequences for an improved
hydro+cascade description of the relativistic nuclear collisions are discussed.
The unique properties of the three flux discontinuity and their effect on the
space-time evolution of the transverse expansion are also analyzed. The
possible modifications of both transversal radii from pion correlations
generated by a correct hydro+cascade approach are discussed.


title: Correlated two-pion exchange and large-N(C) behavior of nuclear forces

abstract:
  The effect of correlated scalar-isoscalar two-pion exchange (CrTPE) modes is
considered in connection with central and spin-orbit parts of the NN force. The
two-pion correlation function is coupled directly to the scalar form factor of
the nucleon which we calculate in the large-N(C) limit where the nucleon can be
described as a soliton of an effective chiral theory. The results for the
central NN force show a strong repulsive core at short internucleon distances
supplemented by a moderate attraction beyond 1 fm. The long-range tail of the
central NN potential is driven by the the pion-nucleon sigma term and
consistent with the effective $\sigma$ meson exchange. The spin-orbit part of
the NN potential is repulsive. The large-N(C) scaling behavior of the
scalar-isoscalar NN interaction is addressed. We show that the spin-orbit part
is O(1/N^2(C)) in strength relative to the central force resulting in the ratio
$\simeq 1/9$ suggested by the 1/N(C) expansion for N(C)=3. The latter is in
agreement with our numerical analysis and with the Kaplan-Manohar large-N(C)
power counting. Unitarization of the $\pi \pi$ scattering amplitude plays here
an important role and improves the tree level results. Analytical
representations of the CrTPE NN potential in terms of elementary functions are
derived and their chiral content is discussed.


title:
Quasi-elastic knockout of pions and kaons from nucleons by high-energy
  electrons and quark microscopy of "soft" meson degrees of freedom in the
  nucleon

abstract:
  Electro-production of pions and kaons at the kinematics of quasi-elastic
knockout (which is well known in the physics of atomic nucleus and corresponds
to the $t$-pole diagram) is proposed for obtaining their momentum distribution
(MD) in various channels of virtual decay $N \to B+\pi$, $B=N$, $\Delta$,
$N^*$, $N^{**}$, and $N \to Y+K$, $Y=\Lambda$, $\Sigma$. It is a powerful tool
for investigation of a quark microscopic picture of the meson cloud in the
nucleon. A model of scalar $q \bar{q}$ ($^3P_0$) fluctuation in the non-trivial
QCD vacuum is used to calculate pion and kaon momentum distributions (MD) in
these channels.


title: Radii in weakly-bound light halo nuclei

abstract:
  A systematic study of the root-mean-square distance between the constituents
of weakly-bound nuclei consisting of two halo neutrons and a core is performed
using a renormalized zero-range model. The radii are obtained from a universal
scaling function that depends on the mass ratio of the neutron and the core, as
well as on the nature of the subsystems, bound or virtual. Our calculations are
qualitatively consistent with recent data for the neutron-neutron
root-mean-square distance in the halo of $^{11}$Li and $^{14}$Be nuclei.


title:
Supernova Inelastic Neutrino-Nucleus Cross Sections from High-Resolution
  Electron Scattering Experiments and Shell-Model Calculations

abstract:
  Highly precise data on the magnetic dipole strength distributions from the
Darmstadt electron linear accelerator for the nuclei 50Ti, 52Cr and 54Fe are
dominated by isovector Gamow-Teller-like contributions and can therefore be
translated into inelastic total and differential neutral-current
neutrino-nucleus cross sections at supernova neutrino energies. The results
agree well with large-scale shell-model calculations, validating this model.


title: Coulomb screening effect on the nuclear-pasta structure

abstract:
  Using the density functional theory (DFT) with the relativistic mean field
(RMF) model, we study the non-uniform state of nuclear matter, ``nuclear
pasta''. We self-consistently include the Coulomb interaction together with
other interactions. It is found that the Coulomb screening effect is
significant for each pasta structure but not for the bulk equation of state
(EOS) of the nuclear pasta phase.


title:
Induced Nucleon Polarization and Meson-Exchange Currents in (e,e'p)
  Reactions

abstract:
  Nucleon recoil polarization observables in $(e,e'\vec{p})$ reactions are
investigated using a semi-relativistic distorted-wave model which includes one-
and two-body currents with relativistic corrections. Results for the induced
polarization asymmetry are shown for closed-shell nuclei and a comparison with
available experimental data for $^{12}$C is provided. A careful analysis of
meson exchange currents shows that they may affect significantly the induced
polarization for high missing momentum.


title:
Polarization phenomena in elastic $e^{\mp}N$ scattering, for axial
  parametrization of two-photon exchange

abstract:
  We analyze polarization phenomena for elastic lepton-nucleon scattering,
parametrizing the $2\gamma$-exchange contribution, as the product of lepton and
nucleon axial vector currents, that correspond to $C=+1$ exchange in the
annihilation channel. We found two combinations of polarization observables
(one for three T-odd observables and another one - for five T-even
observables), which allow to measure the ratio $G_E(Q^2)/G_M(Q^2)$ of nucleon
electromagnetic form factors in model independent way, without any specific
assumption about the $2\gamma$-exchange mechanism. Both these combinations have
a general character and do not depend on the choice of the spin structure for
the $2\gamma$-exchange. We show the inconsistency of other approximations
recently used in the literature.


title: Super-Symmetry transformation for excitation processes

abstract:
  Quantum Mechanics SUper-SYmmetry (QM-SUSY) provides a general framework for
studies using phenomenological potentials for nucleons (or clusters)
interacting with a core. The SUSY potentials result from the transformation of
the mean field potential in order to account for the Pauli blocking of the core
orbitals. In this article, we discuss how other potentials (like external
probes or residual interactions between the valence nucleons) are affected by
the SUSY transformation. We illustrate how the SUSY transformations induce
off-diagonal terms in coordinate space that play the essential role on the
induced transition probabilities on two examples: the electric operators and
Gaussian external fields. We show that excitation operators, doorway states,
strength and sum rules are modified.


title: Limiting temperature from microscopic equation of state

abstract:
  The limiting temperature $T_{lim}$ of a series of nuclei is calculated
employing a set of microscopic nuclear Equations of State (EoS). It is shown
that the value of $T_{lim}$ is sensitive to the nuclear matter Equation of
State used. Comparison with the values extracted in recent phenomenological
analysis appears to favour a definite selection of EoS' s. On the basis of this
phenomenological analysis, it seems therefore possible to check the microscopic
calculations of the nuclear EoS at finite temperature, which is hardly
accessible through other experimental informations.


title:
Role of quark-quark correlation in baryon structure and non-leptonic
  weak transitions of hyperons

abstract:
  We study the role of quark-quark correlation in the baryon structure and, in
particular, the hyperon non-leptonic weak decay, which is sensitive to the
correlation between quarks in the spin-0 channel. We rigorously solve
non-relativistic three-body problem for SU(3) ground state baryons to take into
account the quark-pair correlation explicitly. With the suitable attraction in
the spin-0 channel, resulting static baryon properties as well as the parity
conserving weak decay amplitudes agree with the experimental values. Special
emphasis is placed also on the effect of the SU(6) spin-flavor symmetry
breaking on the baryon structure. Although the SU(6) breaking effects on the
local behavior of the quark wave functions are considerable due to the spin-0
attraction, the calculated magnetic moments are almost the same as the naive
SU(6) expectations.


title: The Solar $Hep$ Process

abstract:
  The $Hep$ process is a weak-interaction reaction, $He3 + p \to He4 + e^+ +
\nu_e$, which occurs in the sun. There is renewed interest in $Hep$ owing to
current experimental efforts to extract from the observed solar neutrino
spectrum information on non-standard physics in the neutrino sector. $Hep$
produces highest-energy solar neutrinos, although their flux is quite modest.
This implies that the $Hep$ neutrios can at some level influence the solar
neutrino spectrum near its upper end. Therefore, a precise interpretation of
the observed solar neutrino spectrum requires an accurate estimate of the $Hep$
rate. This is an interesting but challenging task. We describe the difficulties
involved and how the recent theoretical developments in nuclear physics have
enabled us to largely overcome these difficulties. A historical survey of $Hep$
calculations is followed by an overview of the latest developments. We compare
the results obtained in the conventional nuclear physics approach and those
obtained in a newly developed effective field theory approach. We also discuss
the current status of the experiments relevant to $Hep$.


title: Subthreshold antiproton production in pC, dC and $\alpha$C reactions

abstract:
  Data from KEK on subthreshold antiproton as well as on charged pion and kaon
production in pC, dC and $\alpha$C reactions at energies between 3.5 and 12.0 A
GeV are described for the first time within a unified approach. We use a model
which considers a nuclear reaction as an incoherent sum over collisions of
varying numbers of projectile and target nucleons. It samples complete events
and thus allows for the simultaneous consideration of all final particles
including the decay products of the nuclear residues. The enormous enhancement
of the antiproton cross section as well as the moderate increase of meson
production in dC and $\alpha$C compared to pC reactions is well reproduced. In
our approach, the observed enhancement near the production threshold is mainly
due to the contributions from the interactions of few-nucleon groups.


title: Weak non-mesonic decay of Hypernuclei

abstract:
  We review the mechanism of weak decay of hypernuclei, with emphasis on the
non-mesonic decay channels. Various theoretical approaches are discussed and
the results are compared with the available experimental data.


title: Baryon superfluidity and neutrino emissivity of neutron stars

abstract:
  For neutron stars with hyperon-mixed core, neutrino emissivity is studied
under the equation of state, obtained by introducing repulsive three-body force
universal for all baryons so as to assure the maximum mass compatible with the
observation. By paying attention to the density-dependence of critical
temperatures of baryon superfluids, which reflect the nature of baryon-baryon
interaction and control neutron star cooling, we show what neutrino emission
processes are efficient in the regions with and without hyperon mixing and
remark its implications related to neutron star cooling.


title: Recent Developments in Electromagnetic Excitation with Fast Heavy Ions

abstract:
  Coulomb dissociation is an especially simple and important reaction
mechanism. Since the perturbation due to the electric field of the (target)
nucleus is exactly known, firm conclusions can be drawn from such measurements.
Electromagnetic matrixelements and astrophysical $S$-factors for radiative
capture processes can be extracted from experiments. The dissociation of
neutron halo nuclei is studied in a zero range model using analytical methods.
Of special interest for nuclear structure physics is the appearence of low
lying electric dipole strength in neutron rich nuclei. We use effective range
methods to study it.


title:
Description of Drip-Line Nuclei within Relativistic Mean-Field Plus BCS
  Approach

abstract:
  Recently it has been demonstrated, considering Ni and Ca isotopes as
prototypes, that the relativistic mean-field plus BCS (RMF+BCS) approach
wherein the single particle continuum corresponding to the RMF is replaced by a
set of discrete positive energy states for the calculation of pairing energy
provides a good approximation to the full relativistic Hartree-Bogoliubov (RHB)
description of the ground state properties of the drip-line neutron rich
nuclei. The applicability of RMF+BCS is essentially due to the fact that the
main contribution to the pairing correlations is provided by the low-lying
resonant states. General validity of this approach is demonstrated by the
detailed calculations for the ground state properties of the chains of isotopes
of O, Ca, Ni, Zr, Sn and Pb nuclei. The TMA and NL-SH force parameter sets have
been used for the effective mean-field Lagrangian. Comprehensive results for
the two neutron separation energy, rms radii, single particle pairing gaps and
pairing energies etc. are presented. The Ca isotopes are found to exhibit
distinct features near the neutron drip line whereby it is found that further
addition of neutrons causes a rapid increase in the neutron rms radius with
almost no increase in the binding energy, indicating the occurrence of halos. A
comparison of these results with the available experimental data and with the
recent continuum relativistic Hartree-Bogoliubov (RCHB) calculations amply
demonstrates the validity and usefulness of this fast RMF+BCS approach.


title: Electromagnetic Signatures of the Color Glass Condensate: Dileptons

abstract:
  We evaluate the invariant cross section for production of dileptons in
forward rapidities at RHIC and LHC, using the Color Glass Condensate formalism
and present results for the nuclear modification factor $R_{d(p)A}$ as a
function of dilepton invariant mass for the most central deuteron
(proton)-nucleus collisions.


title: The Operator form of 3H (3He) and its Spin Structure

abstract:
  An operator form of the 3N bound state is proposed. It consists of eight
operators formed out of scalar products in relative momentum and spin vectors,
which are applied on a pure 3N spin 1/2 state. Each of the operators is
associated with a scalar function depending only on the magnitudes of the two
relative momenta and the angle between them. The connection between the
standard partial wave decomposition of the 3N bound state and the operator form
is established, and the decomposition of these scalar function in terms of
partial wave components and analytically known auxiliary functions is given.
That newly established operator form of the 3N bound state exhibits the
dominant angular and spin dependence analytically. The scalar functions are
tabulated and can be downloaded. As an application the spin dependent nucleon
momentum distribution in a polarized 3N bound state is calculated to illustrate
the use of the new form of the 3N bound state.


title: Shell effect in Pb isotopes near the proton drip line

abstract:
  A mass formula (BWM) without shell effect is employed to study the variation
of the shell effect in Pb isotopes through comparison with the experimental
data. Unlike other macroscopic formulae, the BWM reproduces the general trend
of the binding energy versus neutron number curves of all the nuclei from Li to
Bi. The shell effect in Pb-isotopes reduces to ~56 keV at N=106 but, increases
gradually for N<106, indicating increasing shell effect in Pb near the proton
drip line.


title:
Lepton interferometry in relativistic heavy ion collisions - a case
  study

abstract:
  We propose intensity interferometry with identical lepton pairs as an
efficient tool for the estimation of the source size of the expanding hot zone
produced in relativistic heavy ion collisions. This can act as a complementary
method to two photon interferometry. The correlation function of two electrons
with the same helicity has been evaluated for RHIC energies. The thermal shift
of the rho meson mass has negligible effects on the HBT radii.


title:
Nuclear matter saturation in a relativistic chiral theory and QCD
  susceptibilities

abstract:
  We study a chiral relativistic theory of nuclear matter aimed at the
desciption of both the binding and saturation properties and the QCD
properties, quark condensate and QCD susceptibilities. For this purpose the
nucleon scalar response of the quark-meson coupling model is introduced in the
linear sigma model. The consequences for the nuclear and the QCD scalar
susceptibilities are discussed.


title: Bounds on the angles for the parameterization of three neutrino mixing

abstract:
  An algebraic approach is used to derive symmetry relations for the
parameterization of the three neutrino mixing matrix. The symmetry relations
imply bounds on the mixing angles. Including a CP violating phase $\delta$, the
mixing angles $\theta_{jk}$ lie in the range [0,$\pi$/2], and $\delta$ lies
within [0,$2\pi$). If one restricts the CP phase $\delta \in [0,\pi)$, then one
must extend the range of either $\theta_{12}$ {\it or} $\theta_{23}$ to $[0,
\pi)$. In particular, for no CP violation, one can set $\delta=0$ {\it and}
$\delta=\pi$ with $\theta_{jk}$ in the range [0,$\pi$/2]. Alternatively, one
can set $\delta=0$ only, and allow either $\theta_{12}$ {\it or} $\theta_{23}$
to lie within [0,$\pi$).


title: Effect of resonance decays on hadron elliptic flows

abstract:
  The influence of resonance decays on the elliptic flows of stable hadrons is
studied in the quark coalescence model. Although difference between the
elliptic flow of pions from resonance decays, except the rho meson, and that of
directly produced pions is appreciable, those for other stable hadrons are
small. Since there are more pions from the decays of rho mesons than from other
resonances, including resonance decays can only account partially the deviation
of final pion elliptic flow from the observed scaling of hadron elliptic flows,
i.e., the hadron elliptic flow per quark is the same at same transverse
momentum per quark. The remaining deviation can be explained by including the
effect due to the quark momentum distribution inside hadrons.


title: Survey of charge symmetry breaking operators for dd -> alpha pi0

abstract:
  The charge-symmetry-breaking amplitudes for the recently observed d d ->
alpha pi0 reaction are investigated. Chiral perturbation theory is used to
classify and identify the leading-order terms. Specific forms of the related
one- and two-body tree level diagrams are derived. As a first step toward a
full calculation, a few tree-level two-body diagrams are evaluated at each
considered order, using a simplified set of d and alpha wave functions and a
plane-wave approximation for the initial dd state. The leading-order
pion-exchange term is shown to be suppressed in this model because of poor
overlap of the initial and final states. The higher-order one-body and
short-range (heavy-meson-exchange) amplitudes provide better matching between
the initial and final states and therefore contribute significantly and
coherently to the cross section. The consequences this might have for a full
calculation, with realistic wave functions and a more complete set of
amplitudes, are discussed.


title:
Novel effects of electromagnetic interaction on the correlation of
  nucleons in nuclear matter

abstract:
  The electromagnetic(EM) interactions between charged protons on the
correlations of nucleons are discussed by introducing the Anderson-Higgs
mechanism of broken U(1) EM symmetry into the relativistic nuclear theory with
a parametric photon mass. The non-saturating Coulomb force contribution is
emphasized on the equation of state of nuclear matter with charge symmetry
breaking(CSB) at finite temperature and the breached $^1S_0$ pairing
correlations of proton-proton and neutron-neutron. The universal properties
given by an order parameter field with a non-zero vacuum expectation value
(VEV) nearby phase transition are explored within the mean field theory(MFT)
level. This mechanism can be extended to the charged or charge neutralized
strongly coupling multi-components system for the discussion of binding or
pairing issues.

categories: nucl-th astro-ph cond-mat.soft cond-mat.str-el gr-qc hep-ph nucl-ex quant-ph


title: Nuclear halo and its scaling laws

abstract:
  We have proposed a procedure to extract the probability for valence particle
being out of the binding potential from the measured nuclear asymptotic
normalization coefficients. With this procedure, available data regarding the
nuclear halo candidates are systematically analyzed and a number of halo nuclei
are confirmed. Based on these results we have got a much relaxed condition for
nuclear halo occurrence. Furthermore, we have presented the scaling laws for
the dimensionless quantity $<r^{2}>/R^{2}$ of nuclear halo in terms of the
analytical expressions of the expectation value for the operator $r^{2}$ in a
finite square-well potential.


title: Intruder level and deformation in the SD-pair shell model

abstract:
  The influence of the intruder level on nuclear deformation is studied within
the framework of the nucleon-pair shell model truncated to an SD-pair subspace.
The results suggest that the intruder level has a tendency to soften the
deformation and plays an important role in determining the onset of rotational
behavior.


title:
Numerical modelling of the quantum-tail effect on fusion rates at low
  energy

abstract:
  Results of numerical simulations of fusion rate d(d,p)t, for low-energy
deuteron beam, colliding with deuterated metallic matrix (Raiola et al. Phys.
Lett.B 547 (2002) 193 and Eur. Phys J. A 13 (2002) 377) confirm analytical
estimate given in Coraddu et al. nucl-th/0401043, taking into account quantum
tails in the momentum distribution function of target particles, and predict an
enhanced astrophysical factor in the 1 keV region in qualitative agreement with
experiments.


title:
Strangeness dynamics and transverse pressure in relativistic
  nucleus-nucleus collisions

abstract:
  We investigate hadron production as well as transverse hadron spectra from
proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 $A\cdot$GeV
to 21.3 $A\cdot$TeV within two independent transport approaches (HSD and UrQMD)
that are based on quark, diquark, string and hadronic degrees of freedom. The
comparison to experimental data on transverse mass spectra from $pp$, $pA$ and
C+C (or Si+Si) reactions shows the reliability of the transport models for
light systems. For central Au+Au (Pb+Pb) collisions at bombarding energies
above $\sim$ 5 A$\cdot$GeV, furthermore, the measured $K^{\pm}$ transverse mass
spectra have a larger inverse slope parameter than expected from the default
calculations. We investigate various scenarios to explore their potential
effects on the $K^\pm$ spectra. In particular the initial state Cronin effect
is found to play a substantial role at top SPS and RHIC energies. However, the
maximum in the $K^+/\pi^+$ ratio at 20 to 30 A$\cdot$GeV is missed by ~40% and
the approximately constant slope of the $K^\pm$ spectra at SPS energies is not
reproduced either. Our systematic analysis suggests that the additional
pressure - as expected from lattice QCD calculations at finite quark chemical
potential $\mu_q$ and temperature $T$- should be generated by strong
interactions in the early pre-hadronic/partonic phase of central Au+Au (Pb+Pb)
collisions.


title: The role of the nucleon recoil in low--energy meson--nucleus reactions

abstract:
  The role of the nucleon recoil corrections in low--energy meson--nucleus
interactions is examined. We demonstrate explicitly when calculations within
the static approximation are justified and when the recoil terms need to be
kept explictly in the propagators, depending on whether the S-wave two--nucleon
intermediate state is Pauli blocked or not, while the meson is in flight. While
the effect is studied in detail for $\pi d$ scattering only, a large class of
other reactions is discussed for which the findings are relevant as well.


title: Balance functions from a thermal model

abstract:
  A calculation of the pion balance functions in a thermal model is presented.
The total result consists of resonance and non-resonance parts. A satisfactory
agreement with the data on Au+Au collisions at 130 GeV is found.


title:
Neutron halo and the impact-parameter dependence of the $\pi^+ - \pi^-$
  asymmetry in heavy ion collisions

abstract:
  The theoretical nuclear physics predictions and experimental results on
antiprotonic atoms lead to different proton and neutron spatial distributions.
At CERN SPS energies production of positive and negative pions differs for
$pp$, $pn$, $np$ and $nn$ scattering. These two facts lead to an impact
parameter dependence of the $\pi^+$ to $\pi^-$ ratio in $^{208}Pb + ^{208}Pb$
collisions. A recent experiment at CERN seems to confirm qualitatively these
predictions. The results for two models considered are almost identical. It may
open a new possibility for determination of neutron density distribution in
nuclei.


title:
Faddeev calculations of break-up reactions with realistic experimental
  constraints

abstract:
  We present a method to integrate predictions from a theoretical model of a
reaction with three bodies in the final state over the region of phase space
covered by a given experiment. The method takes into account the true
experimental acceptance, as well as variations of detector efficiency, and
eliminates the need for a Monte-Carlo simulation of the detector setup. The
method is applicable to kinematically complete experiments. Examples for the
use of this method include several polarization observables in dp break-up at
270 MeV. The calculations are carried out in the Faddeev framework with the CD
Bonn nucleon-nucleon interaction, with or without the inclusion of an
additional three-nucleon force.


title: Backbending and $Gamma$-Vibrations

abstract:
  We propose that the backbending phenomenon can be explained as a result of
the disappearance of collective $gamma$-vibrational mode in the rotating frame.
Using a cranking+random phase approximation approach for the modified Nilsson
potential + monopole pairing forces, we show that this mechanism is responsible
for the backbending in $^{156}$Dy, $^{158}$Er and obtain a good agreement
between theoretical and experimental results.


title: Superfluid Properties of the Inner Crust of Neutron Stars

abstract:
  Superfluid properties of the inner crust matter of neutron stars, formed by
nuclear clusters immersed in a dilute neutron gas, are analysed in a self-
consistent HFB approach. The calculations are performed with two pairing
forces, fixed so as to obtain in infinite nuclear matter the pairing gaps
provided by the Gogny force or by induced interactions. It is shown that the
nuclear clusters can either suppress or enhance the pairing correlations inside
the inner crust matter, depending on the density of the surrounding neutrons.
The profile of the pairing field in the inner crust is rather similar for both
pairing forces, but the values of the pairing gaps are drastically reduced for
the force which simulates the polarisation effects in infinite neutron matter.


title:
Adiabatic nucleus-nucleus potential at near-barrier energies from
  selfconsistent calculations

abstract:
  Adiabatic fusion potentials, extended well into compound nucleus region, are
calculated for a number of reactions within the static Hartree-Fock method with
the Skyrme SkM* interaction. The calculated fusion barriers agree quite well
with the data, in spite of considerable errors in reaction Q values. This
suggests some error cancellation, possibly with the relative kinetic energy
term. Calculated berrier heights are consistent with the idea of fusion
hindrance in tip collisions. Adiabatic potentials differ considerably from the
results of the frozen density approximation. We briefly discuss relative
positions and heights of the fusion and fission potentials and speculate on
their possible connection with the fusion hindrance for large Zt Zp.


title: Self-consistent Green's function method for nuclei and nuclear matter

abstract:
  Recent results obtained by applying the method of self-consistent Green's
functions to nuclei and nuclear matter are reviewed. Particular attention is
given to the description of experimental data obtained from the (e,e'p) and
(e,e'2N) reactions that determine one and two-nucleon removal probabilities in
nuclei since the corresponding amplitudes are directly related to the imaginary
parts of the single-particle and two-particle propagators. For this reason and
the fact that these amplitudes can now be calculated with the inclusion of all
the relevant physical processes, it is useful to explore the efficacy of the
method of self-consistent Green's functions in describing these experimental
data. Results for both finite nuclei and nuclear matter are discussed with
particular emphasis on clarifying the role of short-range correlations in
determining various experimental quantities. The important role of long-range
correlations in determining the structure of low-energy correlations is also
documented. For a complete understanding of nuclear phenomena it is therefore
essential to include both types of physical correlations. We demonstrate that
recent experimental results for these reactions combined with the reported
theoretical calculations yield a very clear understanding of the properties of
{\em all} protons in the nucleus. We propose that this knowledge of the
properties of constituent fermions in a correlated many-body system is a unique
feature of nuclear physics.


title: Stable Bose-Einstein correlations

abstract:
  The shape of Bose-Einstein (or HBT) correlation functions is determined for
the case when particles are emitted from a stable source, obtained after
convolutions of large number of elementary random processes. The two-particle
correlation function is shown to have a {\it stretched exponential} shape,
characterized by the L\'evy index of stability $ 0 < \alpha \le 2$ and the
scale parameter $R$. The normal, Gaussian shape corresponds to a particular
case, when $\alpha = 2$ is selected. The asymmetry parameter of the stable
source, $\beta$ is shown to be proportional to the angle, measured by the
normalized three-particle cumulant correlations.


title: Buda-Lund hydro model and the elliptic flow at RHIC

abstract:
  The ellipsoidally symmetric Buda-Lund hydrodynamic model describes naturally
the transverse momentum and the pseudorapidity dependence of the elliptic flow
in Au+Au collisions at $\sqrt{s_{NN}} = 130$ and 200 GeV. The result confirms
the indication of quark deconfinement in Au+Au collisions at RHIC, obtained
from Buda-Lund hydro model fits to combined spectra and HBT radii of BRAHMS,
PHOBOS, PHENIX and STAR.


title: A hint at quark deconfinement in 200 GeV Au+Au data at RHIC

abstract:
  We give the emission function of the axially symmetric Buda-Lund hydro model
and present its simultaneous, high quality fits to identified particle spectra,
two-particle Bose-Einstein or HBT correlations and charged particle
pseudorapidity distributions as measured by BRAHMS and PHENIX in 0-30 %
central, $\sqrt{s_{\NN}} = 200$ GeV Au+Au collisions at RHIC. The best fit is
achieved when the most central region of the particle emitting volume is
superheated to $T_0 = 200 \pm 9$ MeV $ \ge T_c =172 \pm 3$ MeV, a preliminary,
3 $\sigma$ effect.


title: Density Perturbations in Heavy-Ion Collisions below the Critical Point

abstract:
  Heavy ion collisions at large baryon density may exhibit a first order phase
transition from a chirally symmetric phase to the symmetry broken ground state.
This should then lead to large density inhomogeneities, which affect the
relative hadron multiplicities.


title:
In-medium properties of the omega meson through omega photoproduction in
  nuclei

abstract:
  The feasibility to study the in-medium properties of the omega meson in
photon induced reactions on nuclei is investigated by means of a semiclassical
transport model. The calculations are dedicated to an experiment presently
being analyzed by the TAPS/Crystal Barrel collaborations. A full
coupled-channel treatment of final state interactions allows a quantitative
analysis of the influence of absorption and elastic scattering of the produced
hadrons and likewise the application of kinematic cuts on the observables.
Within the scope of our calculations, the preliminary data by the TAPS/Crystal
Barrel collaborations indeed seem to indicate a modification of the isoscalar
spectral density in the strongly interacting environment.


title:
The detailed mechanism of the eta production in pp scattering up to the
  Tlab = 4.5 GeV

abstract:
  Contrary to very early beliefs, the experimental cross section data for the
eta production in proton-proton scattering are well described if pi and only
eta meson exchange diagrams are used to calculate the Born term. The inclusion
of initial and final state interactions is done in the factorization
approximation by using the inverse square of the Jost function. The two body
Jost functions are obtained from the S matrices in the low energy effective
range approximation. The danger of double counting in the p-eta final state
interaction is discussed. It is shown that higher partial waves in
meson-nucleon amplitudes do not contribute significantly bellow excess energy
of Q=100 MeV. Known difficulties of reducing the multi resonance model to a
single resonance one are illustrated.


title: Isospin effects in intermediate energy heavy ion collisions

abstract:
  We investigate the density dependence of the symmetry energy in a
relativistic description by decomposing the iso-vector mean field into
contributions with different Lorentz properties. We find important effects of
the iso-vector, scalar $\delta$ channel on the density behavior of the symmetry
energy. Finite nuclei studies show only moderate effects originating from the
virtual $\delta$ meson. In heavy ion collisions from Fermi to relativistic
energies up to $1-2 AGeV$ one finds important contributions on the dynamics
arising from the different treatment of the microscopic Lorentz structure of
the symmetry energy. We discuss a variety of possible signals which could set
constraints on the still unknown density dependence of the symmetry energy,
when experimental data will be available. Examples of such observables are
isospin collective flow, threshold production of pions and kaons, isospin
equilibration and stopping in asymmetric systems like $Au+Au$, $Sn+Sn$ and
$Ru(Zr)+Zr(Ru)$.


title: Charmonium chemistry in A+A collisions at relativistic energies

abstract:
  Charmonium production and suppression in heavy-ion collisions at relativistic
energies is investigated within different models, i.e. the comover absorption
model, the threshold suppression model, the statistical coalescence model and
the HSD transport approach. In HSD the charmonium dissociation cross sections
with mesons are described by a simple phase-space parametrization including an
effective coupling strength $|M_i|^2$ for the charmonium states $i=\chi_c,
J/\psi, \psi^\prime$. This allows to include the backward channels for
charmonium reproduction by $D \bar{D}$ channels -- which are missed in the
comover absorption and threshold suppression model -- employing detailed
balance without introducing any new parameters. It is found that all approaches
yield a reasonable description of $J/\psi$ suppression in S+U and Pb+Pb
collisions at SPS energies. However, they differ significantly in the
$\psi^\prime/J/\psi$ ratio versus centrality at SPS and especially at RHIC
energies. These pronounced differences can be exploited in future measurements
at RHIC to distinguish the hadronic rescattering scenarios from quark
coalescence close to the QGP phase boundary.


title:
Testing T Invariance in the Interaction of Slow Neutrons with Aligned
  Nuclei

abstract:
  The study of five-fold (P even, T odd) correlation in the interaction of slow
polarized neutrons with aligned nuclei is a possible way of testing the time
reversal invariance due to the expected enhancement of T violating effects in
compound resonances. Possible nuclear targets are discussed which can be
aligned both dynamically as well as by the "brute force" method at low
temperature. A statistical estimation is performed of the five-fold correlation
for low lying p wave compound resonances of the $^{121}$Sb, $^{123}$Sb and
$^{127}$I nuclei. It is shown that a significant improvement can be achieved
for the bound on the intensity of the fundamental parity conserving time
violating (PCTV) interaction.


title:
Nucleon resonances and the production of light vector mesons near
  thresholds

abstract:
  The production of the light vector mesons $V = \rho, \omega, \phi$ in the
reactions $\pi N \to V N$ and $N N \to V N N$ near threshold is studied. The
subsequent electromagnetic decay $V \to \gamma^* \to e^+ e^-$ is particularly
suited for exploring subthreshold $\omega N$ resonances.


title:
Density dependencies of interaction strengths and their influence on
  nuclear matter and neutron star in relativistic mean field theory

abstract:
  The density dependencies of various effective interaction strengths in the
relativistic mean field are studied and carefully compared for nuclear matter
and neutron stars. The influences of different density dependencies are
presented and discussed on mean field potentials, saturation properties for
nuclear matter, equations of state, maximum masses and corresponding radii for
neutron stars. Though the interaction strengths and the potentials given by
various interactions are quite different in nuclear matter, the differences of
saturation properties are subtle, except for NL2 and TM2, which are mainly used
for light nuclei, while the properties by various interactions for pure neutron
matter are quite different. To get an equation of state for neutron matter
without any ambiguity, it is necessary to constrain the effective interactions
either by microscopic many-body calculations for the neutron matter data or the
data of nuclei with extreme isospin. For neutron stars, the interaction with
large interaction strengths give strong potentials and large
Oppenheimer-Volkoff (OV) mass limits. The density-dependent interactions DD-ME1
and TW-99 favor a large neutron population due to their weak $\rho$-meson field
at high densities. The OV mass limits calculated from different equations of
state are 2.02 $\sim$ 2.81$ M_\odot$, and the corresponding radii are 10.78
$\sim$ 13.27 km. After the inclusion of the hyperons, the corresponding values
become 1.52 $\sim$ 2.06 $M_\odot$ and 10.24 $\sim$ 11.38 km.


title: The Shell Model as Unified View of Nuclear Structure

abstract:
  The last decade has witnessed both quantitative and qualitative progresses in
Shell Model studies, which have resulted in remarkable gains in our
understanding of the structure of the nucleus. Indeed, it is now possible to
diagonalize matrices in determinantal spaces of dimensionality up to 10^9 using
the Lanczos tridiagonal construction, whose formal and numerical aspects we
will analyze. Besides, many new approximation methods have been developed in
order to overcome the dimensionality limitations. Furthermore, new effective
nucleon-nucleon interactions have been constructed that contain both two and
three-body contributions. The former are derived from realistic potentials
(i.e., consistent with two nucleon data). The latter incorporate the pure
monopole terms necessary to correct the bad saturation and shell-formation
properties of the realistic two-body forces. This combination appears to solve
a number of hitherto puzzling problems. In the present review we will
concentrate on those results which illustrate the global features of the
approach: the universality of the effective interaction and the capacity of the
Shell Model to describe simultaneously all the manifestations of the nuclear
dynamics either of single particle or collective nature. We will also treat in
some detail the problems associated with rotational motion, the origin of
quenching of the Gamow Teller transitions, the double beta-decays, the effect
of isospin non conserving nuclear forces, and the specificities of the very
neutron rich nuclei. Many other calculations--that appear to have ``merely''
spectroscopic interest--are touched upon briefly, although we are fully aware
that much of the credibility of the Shell Model rests on them.


title: Probing nucleon-nucleon correlations with (e,e'p) and (e,e'pp) reactions

abstract:
  Some of the recent attempts to detect signals of nucleon-nucleon correlations
with semi-exclusive A(e,e'p) and exclusive A(e,e'pN) processes are reviewed.
Unfactorized and distorted-wave calculations for these processes are discussed.
The calculations implement two-body currents stemming from pion-exchange and
intermediate $\Delta$ excitation. The two-body currents are shown to be highly
competitive with the mechanisms related to nucleon-nucleon correlations. This
observation seriously hampers attempts to link semi-exclusive A(e,e'p)
measurements, which probe high missing energies, to the correlated part of the
nuclear spectral function. Signals of central short-range correlations (SRC)
have been detected in (e,e'pp) measurements on ^{12}C and ^{16}O, thereby
confirming the picture that in hadronic matter SRC solely affect nucleon pairs
with a small center-of-mass momentum and residing in a relative S state.


title:
QCD sum rules at finite density in the large-N_c limit: The coupling of
  the rho-nucleon system to the D_{13}(1520)

abstract:
  QCD sum rules are studied for the vector-isovector current at finite baryon
density in the limit of large number of colors N_c. For the condensate side it
is shown that in this limit the four-quark condensate factorizes also for the
finite density case. At the hadronic side the medium dependence is expressed in
terms of the current-nucleon forward scattering amplitude. Generalizing vector
meson dominance we allow for a direct coupling of the current to the nucleon as
well as a coupling via the rho meson. We discuss the N_c dependence of (a)
modifications of the pion cloud of the rho meson, (b) mixing with other mesons
(in particular a_1 and omega) and (c) resonance-hole excitations R N^{-1}. We
show that only the last effect survives in the large-N_c limit. Saturating the
sum rules with a simple hadronic ansatz which allows for the excitation of the
D_{13}(1520) we determine the coupling of the latter to the rho-nucleon and the
photon-nucleon system. These couplings are hard to determine from vacuum
physics alone.


title: Momentum anisotropies in the quark coalescence model

abstract:
  Based on the quark coalescence model, we derive relations among the momentum
anisotropies of mesons and baryons in relativistic heavy ion collisions from a
given, but arbitrary azimuthal distribution for the partons. Besides the
familiar even Fourier coefficients such as the elliptic flow, we also pay
attention to odd Fourier coefficients such as the directed flow, which has been
observed at finite rapidity even at RHIC energies.


title: Unbound exotic nuclei studied by transfer to the continuum reactions

abstract:
  In this paper we show that the theory of transfer reactions from bound to
continuum states is well suited to extract structure information from data
obtained by performing "spectroscopy in the continuum". The low energy unbound
states of nuclei such as $^{10}$Li and $^{5}$He can be analyzed and the
neutron-core interaction, necessary to describe the corresponding borromean
nuclei $^{11}$Li and $^{6}$He can be determined in a semi-phenomenological way.
An application to the study of $^{10}$Li is then discussed and it is shown that
the scattering length for s-states at threshold can be obtained from the ratio
of experimental and theoretical cross sections. The scattering single particle
states of the system n+$^{9}$Li are obtained in a potential model. The
corresponding S-matrix is used to calculate the transfer cross section as a
function of the neutron continuum energy with respect to $^{9}$Li. Three
different reactions are calculated $^{9}Li(d,p)^{10}Li$,
$^{9}Li(^{9}Be,^{8}Be)^{10}Li$, $^{9}Li(^{13}C,^{12}C)^{10}Li$, to check the
sensitivity of the results to the target used and in particular to the transfer
matching conditions. Thus the sensitivity of the structure information
extracted from experimental data on the reaction mechanism is assessed.


title: Aharonov-Bohm effect and nucleon-nucleon phase shifts on the lattice

abstract:
  We propose a method for the lattice QCD computation of nucleon-nucleon
low-energy interactions. It consists in simulating QCD in the background of a
''electromagnetic" field whose potential is non-vanishing, but whose field
strength is zero. By tuning the background field, phase-shifts at any (but
small) momenta can be determined by measuring the shift of the ground state
energy. Lattice sizes as small as 5 Fermi can be sufficient for the calculation
of phase shifts up to momenta of order of $m_{\pi}/2$.


title:
Compton Scattering off Nucleons: Focus on the Nucleonic Low-Energy
  Degrees of Freedom

abstract:
  In this sketch, I focus on Physics and formalism behind dynamical
polarisabilities, a new tool to test and interpret quantitative predictions
about the low-energy degrees of freedom inside the nucleon from the multipoles
of Compton scattering for photon energies below 300 MeV. A way to extract them
from double-polarised precision experiments is sketched. Predictions from
Chiral Effective Field Theory, both on the proton and on the neutron, serve as
guideline for forthcoming experiments. Special interest is put on the r\^ole of
the nucleon spin-polarisabilities. For details and a complete list of
references, consult Refs. [1,2,3].


title: Anisotropic flow from Lee-Yang zeroes: a practical guide

abstract:
  We present a new method to analyze anisotropic flow from the genuine
correlation among a large number of particles, focusing on the practical
implementation of the method.


title: An effective field theory for coupled-channel scattering

abstract:
  The problem of describing low-energy two-body scattering for systems with two
open channels with different thresholds is addressed in the context of an
effective field theory. In particular, the problem where the threshold is
unnaturally small and the cross section at low energy is unnaturally large is
considered. It is shown that the lowest-order point coupling associated with
the mixing of the channels scales as $\Lambda^{-2}$ rather than $\Lambda^{-1}$
(the scaling of the same-channel coupling and the scaling in a single-channel
case) where $\Lambda$ is the ultraviolet cutoff. The renormalization of the
theory at lowest order is given explicitly. The treatment of higher orders is
straightforward. The potential implications for systems with deep open channels
are discussed.


title:
Description of the Low-Energy Doublet Neutron-Deuteron Scattering on the
  Basis of the Triton Bound and Virtual State Parameters

abstract:
  Low-energy doublet neutron-deuteron scattering is described on the basis of
the triton bound and virtual state parameters - the energies and the nuclear
vertex constants of these states. The van Oers-Seagrave formula is derived from
the Bargmann representation of the S matrix for a system having two states. The
presence of a pole in this formula is shown to be a direct corollary of the
existence of a low-energy triton virtual state. Simple explicit expressions for
the nd scattering length and for the pole of the function $k\cot \delta $ are
obtained in terms of the triton bound and virtual state parameters. Numerical
calculations of the nd low-energy scattering parameters show their high
sensitivity to variations in the asymptotic normalization constant of the
virtual state $C_{v}^{2}$. The $C_{v}^{2}$ value fitted in our model to the
experimental result for the nd scattering length is $C_{v}^{2}=0.0592$.


title:
Relativistic Contribution of the Final-State Interaction to Deuteron
  Photodisintegration

abstract:
  The contribution of the final-state interaction to the differential
cross-section of deuteron photodisintegration at laboratory photon energies
below 50 MeV is analyzed in the framework of Bethe-Salpeter formalism with a
phenomenological rank-one separable interaction. The approximations made are
the neglect of two-body exchange currents, negative-energy components of the
bound-state vertex function and the scattering T matrix. It has been found that
the gross effect of the final-state interaction with J=0,1 comes from the net
contributions of the spin-triplet final states and spin-singlet (1S0+)-state.
The relativistic results are compared with the nonrelativistic ones in every
partial-wave channel. It is found that the relativistic effects change the
magnitude of the final-state interaction from several percent to several tens
of percent.