title: Semiclassical description of a sixth order quadrupole boson Hamiltonian

abstract:
  A sixth order quadrupole boson Hamiltonian is treated through a time
dependent variational principle approach choosing as trial function a coherent
state with respect to zeroth $b^{\dagger}_0$ and second
$b^{\dagger}_2+b^{\dagger}_{-2}$ components of the quadrupole bosons. The
coefficients involved in the model Hamiltonian are chosen so that the classical
effective potential energy term has two distinct minima. The equation of motion
for the radial coordinate is analytically solved and the resulting trajectories
are extensively studied. One distinguishes three energy regions exhibiting
different types of trajectories. When one passes from the region characterized
by two wells to the region of energies higher than the maximum value of the
effective potential the trajectories period exhibits a singularity which
reflects a phase transition. The classical trajectories are quantized by a
constraint similar to the Bohr-Sommerfeld quantization condition. The
semiclassical spectra corresponding to the two potential wells have specific
properties. The tunneling process through the potential barrier is also
studied. The transmission coefficients exhibit jumps in magnitude when the
angular momentum acquires certain values.


title: Introduction to statistical models and non-extensive statistics

abstract:
  Quark matter is being expected to be found in heavy ion collisions on the
basis of calculations in the framework of traditional, extensive
thermodynamics. Recently a non-extensive generalization of the thermodynamics
is emerging in the theoretical research. We review here some basic concepts in
statistics, kinetic theory and thermodynamics, in particular those encountered
in non-extensive thermodynamics. This offers an introduction into the
theoretical basis of considering non-extensive parton kinetics for describing
the hadronization of quark matter.


title: From Brueckner Approach to Skyrme-type Energy Density Functional

abstract:
  A Skyrme-like effective interaction is built up from the equation of state of
nuclear matter. The latter is calculated in the framework of the
Brueckner-Hartree-Fock approximation with two and three body forces. A complete
Skyrme parametrization requires a fit of the neutron and proton effective
masses and also the Landau parameters. The new parametrization is probed on the
properties of a set of closed-shell and closed-subshell nuclei, including
binding energies and charge radii.


title: Very Narrow Resonances in Spherical Proton Emitting Nuclei

abstract:
  The separation energy and half-life of some heavy proton emitting nuclei, and
the single-particle structure of the unbound 11-N, have been evaluated by
implementing a careful numerical treatment to solve Schrodinger equation in a
continuum discretization context. The basic scheme behind the method consists
in using the ground-state proton emitter in connection with an isolated
single-particle resonance.


title:
STAR $\rho^0/\pi^-$ Ratio in Au-Au Peripheral Collisions at RHIC and the
  Vector Manifestation of Hidden Local Symmetry

abstract:
  The hidden local symmetry effective theory, Wilsonian matched to QCD at a
matching scale near the chiral scale $\sim 4\pi f_\pi$ as formulated by Harada
and Yamawaki, presents a scenario drastically different from the standard
scenario of heavy-ion collisions in that as the temperature approaches the
critical temperature $T_c$ of chiral restoration from below, the mass of the
vector mesons and their widths go to zero in the chiral limit or nearly zero
otherwise, proportionally to some power of the quark condensate at what is
called "vector manifestation (VM) fixed point". This scenario makes a striking
prediction that as the fire-ball expands and cools from $T_c$ down toward the
freezeout temperature $T_{freezeout}$ in heavy ion collisions, what we call
"hadronic freedom" sets in in which hadrons do not interact or barely interact.
We suggest that this scenario is testable at RHIC and as a specific example, we
provide an astonishingly simple explanation in terms of the vector
manifestation suitably extended to include axial-vector mesons for the
anomalously large $\rho^0/\pi^-$ ratio measured in peripheral collisions by
STAR.


title:
The Observable of Lambda Polarity Caused by Source Global Angular
  Momentum Localizing in Peripheral Au-Au Collision at RHIC

abstract:
  An observable to measure the polarity of lambda that caused by source global
angular momentum in peripheral AU-AU collision at RHIC is proposed.This
observable's capacity of measurement is tested by Monte Carlo method.And the
main factors that influence the observable are also researched.This observable
will give an effective proof of the formation of deconfined matter.


title:
Renormalization of NN Interaction with Chiral Two Pion Exchange
  Potential. Non-Central Phases

abstract:
  We extend the renormalization of the NN interaction with Chiral Two Pion
Exchange Potential to the calculation of non-central partial wave phase shifts
with total angular momentum j<=5 . The short distance singularity structure of
the potential as well as the requirement of orthogonality conditions on the
wave functions determines exactly the number of undetermined parameters after
renormalization.


title:
Phase-Space Description of Momentum Spectra in Relativistic Heavy-Ion
  Collisions

abstract:
  We consider a phase-space model for particle production in nuclear
collisions. Once the multiplicities of the individual particle species are
known, single-inclusive momentum spectra can be computed after making
simplifying assumptions for the matrix element for multiparticle production.
Comparison of the calculated spectra with data for pions and kaons from central
Pb+Pb collisions at E_{Lab}=158 AGeV reveals a residual longitudinal
phase-space dominance in the final state of the reaction. We account for this
by modifying the isotropic, relativistic invariant phase space in a way which
retains boost invariance in beam direction but suppresses large transverse
momenta. Adjusting a single parameter, we obtain a reasonably good description
of transverse momentum and rapidity spectra for both pions and kaons.


title: Power counting with one-pion exchange

abstract:
  Techniques developed for handing inverse-power-law potentials in atomic
physics are applied to the tensor one-pion exchange potential to determine the
regions in which it can be treated perturbatively. In S-, P- and D-waves the
critical values of the relative momentum are less than or of the order of 400
MeV. The RG is then used to determine the power counting for short-range
interaction in the presence of this potential. In the P-and D-waves, where
there are no low-energy bound or virtual states, these interactions have
half-integer RG eigenvalues and are substantially promoted relative to naive
expectations. These results are independent of whether the tensor force is
attractive or repulsive. In the 3S1 channel the leading term is relevant, but
it is demoted by half an order compared to the counting for the effective-range
expansion with only a short-range potential. The tensor force can be treated
perturbatively in those F-waves and above that do not couple to P- or D-waves.
The corresponding power counting is the usual one given by naive dimensional
analysis.


title:
Explicit treatment of tensor force with a method of Antisymmetrized
  Molecular Dynamics

abstract:
  In order to treat tensor force explicitly, we propose a microscopic model for
nuclear structure based on antisymmetrized molecular dynamics (AMD). As a
result of the present study, it is found that some extentions of the AMD method
are effective to incorporate the tensor correlation into wave functions.
Calculating the deuteron, triton and $^4$He with the extended version of AMD,
we obtained solutions that have large contribution of the tensor force. By
analyzing the wave funtion of $^4$He, it is found that its single-particle
orbits are composed of normal-size $0s$ orbits and shrunk $p$ orbits so as to
gain the tensor force.


title: Quantitative Relativistic Effects in the Three-Nucleon Problem

abstract:
  The quantitative impact of the requirement of relativistic invariance in the
three-nucleon problem is examined within the framework of Poincar\'e invariant
quantum mechanics. In the case of the bound state, and for a wide variety of
model implementations and reasonable interactions, most of the quantitative
effects come from kinematic factors that can easily be incorporated within a
non-relativistic momentum-space three-body code.


title:
On the treatment of the $\Delta$-contribution in electromagnetic
  $pp$-knockout reactions

abstract:
  The treatment of the $\Delta$-current and its contribution in the exclusive
$^{16}$O$(e,e'pp)^{14}$C and $^{16}$O$(\gamma,pp)^{14}$C knockout reactions are
investigated in combination with the effects of correlations.
  Different parametrizations of the effective $\Delta$-current and different
treatments of correlations in the two-nucleon overlap function are considered.
The results are presented and discussed for a suitable choice of kinematics. It
is found that the investigation of different mutually supplementing kinematics
is necessary to resolve the uncertainties in the theoretical ingredients and
extract clear and unambiguous information on correlations.


title:
Isospin Dependence in the Odd-Even Staggering of Nuclear Binding
  Energies

abstract:
  The FRS-ESR facility at GSI provides unique conditions for precision
measurements of large areas on the nuclear mass surface in a single experiment.
Values for masses of 604 neutron-deficient nuclides (30<=Z<=92) were obtained
with a typical uncertainty of 30 microunits. The masses of 114 nuclides were
determined for the first time. The odd-even staggering (OES) of nuclear masses
was systematically investigated for isotopic chains between the proton shell
closures at Z=50 and Z=82. The results were compared with predictions of modern
nuclear models. The comparison revealed that the measured trend of OES is not
reproduced by the theories fitted to masses only. The spectral pairing gaps
extracted from models adjusted to both masses, and density related observables
of nuclei agree better with the experimental data.


title: Global properties of the Skyrme-force-induced nuclear symmetry energy

abstract:
  Large scale calculations are performed to establish the global mass
dependence of the nuclear symmetry energy, $a_{sym}(A)$, which in turn depends
on two basic ingredients: the mean-level spacing, $\epsilon(A)$, and the
effective strength of the isovector mean-potential, $\kappa(A)$. Surprisingly,
our results reveal that in modern parameterizations including SLy4, SkO, SkXc,
and SkP these two basic ingredients of $a_{sym}$ are almost equal after
rescaling them linearly by the isoscalar and the isovector effective masses,
respectively. This result points toward a new fundamental property of the
nuclear interaction that remains to be resolved. In addition, our analysis
determines the ratio of the surface-to-volume contributions to $a_{sym}$ to be
$\sim$1.6, consistent with hydrodynamical estimates for the static dipole
polarizability as well as the neutron-skin.


title: Description of the nuclear octupole and quadrupole deformation

abstract:
  A parametrization of octupole plus quadrupole deformation, in terms of
intrinsic variables defined in the rest frame of the overall tensor of inertia,
is presented and discussed. The model is valid for situations close to the
axial symmetry, but non axial deformation parameters are not frozen to zero.
The properties of the octupole excitations in the deformed Thorium isotopes
Th-226, Th-228 are interpreted in the frame of this model. A tentative
interpretation of octupole oscillations in nuclei close to the X(5) symmetry,
in terms of an exactly separable potential, is also discussed.


title:
Recursive renormalization of the singlet one-pion-exchange plus
  point-like interactions

abstract:
  The subtracted kernel approach is shown to be a powerful method to be
implemented recursively in scattering equations with regular plus point-like
interactions. The advantages of the method allows one to recursively
renormalize the potentials, with higher derivatives of the Dirac-delta,
improving previous results. The applicability of the method is verified in the
calculation of the $^1S_0$ nucleon-nucleon phase-shifts, when considering a
potential with one-pion-exchange plus a contact interaction and its
derivatives. The $^1S_0$ renormalization parameters are fitted to the data. The
method can in principle be extended to any derivative order of the contact
interaction, to higher partial waves and to coupled channels.


title: Pentaquarks in the medium in the quark-meson coupling model

abstract:
  We calculate the properties of the pentaquarks $\Theta^+$ and $\Xi^{--,0}$ in
symmetric nuclear matter using the quark meson coupling model (QMC). The
stability of the $\Theta^+$ in the medium with respect to the channel
$\Theta^+\to NK^+$ is discussed.


title: Fast nucleon emission as a probe of the isospin momentum dependence

abstract:
  In this article we investigate the structure of the non-local part of the
symmetry term, that leads to a splitting of the effective masses of protons and
neutrons in asymmetric matter. Based on microscopic transport simulations we
suggest some rather sensitive observables in collisions of neutron-rich
(unstable) ions at intermediate ($RIA$) energies. In particular we focus the
attention on pre-equilibrium nucleon emissions. We discuss interesting
correlations between the N/Z content of the fast emitted particles and their
rapidity or transverse momentum, that show a nice dependence on the
prescription used for the effective mass splitting.


title: Elliptic flow and incomplete equilibration at RHIC

abstract:
  We argue that RHIC data, in particular those on the anisotropic flow
coefficients v_2 and v_4, suggest that the matter produced in the early stages
of nucleus-nucleus collisions is incompletely thermalized. We interpret the
parameter (1/S)(dN/dy), where S is the transverse area of the collision zone
and dN/dy the multiplicity density, as an indicator of the number of collisions
per particle at the time when elliptic flow is established, and hence as a
measure of the degree of equilibration. This number serves as a control
parameter which can be varied experimentally by changing the system size, the
centrality of the collision, or the beam energy. We provide predictions for
Cu-Cu collisions at RHIC as well as for Pb-Pb collisions at the LHC.


title:
Connection between the "Strutinsky level density" and the semiclassical
  level density (published version)

abstract:
  We establish an analytical link between the level density obtained by means
of the Strutinsky averaging method, and the semiclassical level density. This
link occurs only in the so-called "asymptotic limit". It turns out that the
Strutinsky method amounts to an approximation to the semiclassical method. This
approximation contains an unavoidable remainder which constitutes an intrinsic
noise in comparison to the semiclassical method. Thus, the "old" problem of the
dependency of the Strutinsky procedure on the two free smoothing parameters of
the averaging is intimately connected to this noise. On the other hand, we
demonstrate that the noise of the method is small in the average density of
states and in the average energy, whereas it might be non-negligible in the
shell correction itself. In order to improve this method, we give a "rule"
which consists simply of minimizing the relative error made on the average
energy.


title: On a variational principle model for the Nuclear Caloric curve

abstract:
  Following the lead of a recent work we perform a variational principle model
calculation for the nuclear caloric curve. A Skyrme type interaction with and
without momentum dependence is used. The calculation is done for a large
nucleus, i.e, in the nuclear matter limit. Thus we address the issue of volume
fragmentation only. Nonetheless the results are similar to the previous,
largely phenomenological calculation for a finite nucleus. We find the onset of
fragmentation can be sudden as a function of temperature/excitation energy.


abstract:
  The electric dipole form factor of the nucleon stemming from the QCD
$\bar{\theta}$ term is calculated in chiral perturbation theory in leading
order. To this order, the form factor originates from the pion cloud. Its
momentum-dependence is proportional to a non-derivative time-reversal-violating
pion-nucleon coupling, and the scale for momentum variation--appearing, in
particular, in the radius of the form factor--is the pion mass.


title: The physical interest in kaonic- and antiprotonic-deuterium atoms

abstract:
  Exotic deuterium and helium are discussed. The S, P and D levels of
antiprotonic and kaonic atoms are calculated. Absorptive, subthreshold
antiproton-nucleon amplitudes are extracted from experimental data and compared
to model calculations. The existence of a quasi-bound state in the
antiproton-nucleon system is indicated. In the kaonic atoms some effects of the
Sigma(1385) resonance are evaluated.


title: Scattering theory for arbitrary potentials

abstract:
  The fundamental quantities of potential scattering theory are generalized to
accommodate long-range interactions. New definitions for the scattering
amplitude and wave operators valid for arbitrary interactions including
potentials with a Coulomb tail are presented. It is shown that for the Coulomb
potential the generalized amplitude gives the physical on-shell amplitude
without recourse to a renormalization procedure.


title:
High-Energy Approach for Heavy-Ion Scattering with Excitations of
  Nuclear Collective States

abstract:
  A phenomenological optical potential is generalized to include the Coulomb
and nuclear interactions caused by the dynamical deformation of its surface. In
the high-energy approach analytical expressions for elastic and inelastic
scattering amplitudes are obtained where all the orders in the deformation
parameters are included. The multistep effect of the 2$^+$ rotational state
excitation on elastic scattering is analyzed. Calculations of inelastic cross
sections for the $^{17}$O ions scattered on different nuclei at about hundred
Mev/nucleon are compared with experimental data, and important role of the
Coulomb excitation is established.


title:
Shell Model Monte Carlo method in the $pn$-formalism and applications to
  the Zr and Mo isotopes

abstract:
  We report on the development of a new shell-model Monte Carlo algorithm which
uses the proton-neutron formalism. Shell model Monte Carlo methods, within the
isospin formulation, have been successfully used in large-scale shell-model
calculations. Motivation for this work is to extend the feasibility of these
methods to shell-model studies involving non-identical proton and neutron
valence spaces. We show the viability of the new approach with some test
results. Finally, we use a realistic nucleon-nucleon interaction in the model
space described by (1p_1/2,0g_9/2) proton and
(1d_5/2,2s_1/2,1d_3/2,0g_7/2,0h_11/2) neutron orbitals above the Sr-88 core to
calculate ground-state energies, binding energies, B(E2) strengths, and to
study pairing properties of the even-even 90-104 Zr and 92-106 Mo isotope
chains.


title:
Proton polarizations in polarized 3He studied with the \vec{3He}
  (\vec{e},e' p)d and \vec{3He} (\vec{e},e' p)pn processes

abstract:
  We study within the Faddeev framework the \vec{3He} (\vec{e},e' p)d as well
as the \vec{3He} (\vec{e},e' p)pn and \vec{3He} (\vec{e},e' n)pp reactions in
order to extract information on the proton and neutron polarization in
polarized 3He. We achieve clear analytical insight for simplified dynamical
assumptions and define conditions for experimental access to important 3He
properties. In addition we point to the possibility to measure the
electromagnetic proton form factors in the process \vec{3He} (\vec{e},e' p)d
which would test the dynamical picture and put limits on medium corrections of
the form factors.


title:
$J$-pairing interaction, number of states, and nine-$j$ sum rules of
  four identical particles

abstract:
  In this paper we study $J$-pairing Hamiltonian and find that the sum of
eigenvalues of spin $I$ states equals sum of norm matrix elements within the
pair basis for four identical particles such as four fermions in a single-$j$
shell or four bosons with spin $l$. We relate number of states to sum rules of
nine-$j$ coefficients. We obtained sum rules for nine-$j$ coefficients
$<(jj)J,(jj)K:I| (jj)J, (jj)K:I>$ and $<(ll)J,(ll)K:I| (ll)J, (ll)K:I>$ summing
over (1) even $J$ and $K$, (2) even $J$ and odd $K$, (3) odd $J$ and odd $K$,
and (4) both even and odd $J,K$, where $j$ is a half integer and $l$ is an
integer.


title: Energy Centroids in the presence of random interactions

abstract:
  In this paper we study energy centroids such as those with fixed spin and
isospin, those with fixed irreducible representations for bosons, in the
presence of random two-body and/or three-body interactions. Our results show
that regularities of energy centroids of fixed spin states reported in earlier
works are more robust than expected.


title:
Relativistic Continuum Hartree Bogoliubov Theory for Ground State
  Properties of Exotic Nuclei

abstract:
  The Relativistic Continuum Hartree-Bogoliubov (RCHB) theory, which properly
takes into account the pairing correlation and the coupling to (discretized)
continuum via Bogoliubov transformation in a microscopic and self-consistent
way, has been reviewed together with its new interpretation of the halo
phenomena observed in light nuclei as the scattering of particle pairs into the
continuum, the prediction of the exotic phenomena -- giant halos in nuclei near
neutron drip line, the reproduction of interaction cross sections and
charge-changing cross sections in light exotic nuclei in combination with the
Glauber theory, better restoration of pseudospin symmetry in exotic nuclei,
predictions of exotic phenomena in hyper nuclei, and new magic numbers in
superheavy nuclei, etc. Recent investigations on new effective interactions,
the density dependence of the interaction strengthes, the RMF theory on the
Woods-Saxon basis, the single particle resonant states, and the resonant BCS
(rBCS) method for the pairing correlation, etc. are also presented in some
details.


title: Smallness of the imaginary part of the eta-nucleus scattering length

abstract:
  In two recent analyses of eta meson production a very small imaginary part
was obtained for the eta-He3 scattering length, which is in contradiction with
most theoretical predictions. In this report a plausible explanation is given
to this unexpectedly weak absorption by suppression of the two main
inelasticity channels. It is stressed that the real and imaginary parts of the
elementary scattering length do not necessarily always have the same isospin
algebraic and spatial properties in a nuclear environment and caution should be
exercised in their use in multiple scattering calculations and even
constructing simple optical potentials.


title: Variational Calculations of Nuclei with Low-Momentum Potentials

abstract:
  Variational calculations of the deuteron and the triton illustrate that
simple wave function ans\"atze become more effective after evolving the
nucleon-nucleon potential to lower momentum (``$V_{low k}$''). This is
consistent with many-body wave functions becoming much less correlated at lower
cutoffs, as shown by two-particle wave functions and pair-distribution
functions in nuclear matter. These results motivate a program to explore
variational many-body calculations of binding energies and other low-energy
nuclear properties using low-momentum potentials.


title:
Neutron localization induced by the pairing field in an inhomogeneous
  neutron matter

abstract:
  It is shown that in an inhomogeneous neutron matter the pairing field bounds
neutrons around the Fermi level leading to the formation of localized Andreev
states. In the case of the inner crust of neutron stars the localization length
has been determined as a function of the nuclear density.


title:
Nucleon-nucleon cross sections in neutron-rich matter and isospin
  transport in heavy-ion reactions at intermediate energies

abstract:
  Nucleon-nucleon (NN) cross sections are evaluated in neutron-rich matter
using a scaling model according to nucleon effective masses. It is found that
the in-medium NN cross sections are not only reduced but also have a different
isospin dependence compared with the free-space ones. Because of the
neutron-proton effective mass splitting the difference between nn and pp
scattering cross sections increases with the increasing isospin asymmetry of
the medium. Within the transport model IBUU04, the in-medium NN cross sections
are found to influence significantly the isospin transport in heavy-ion
reactions. With the in-medium NN cross sections, a symmetry energy of
$E_{sym}(\rho)\approx 31.6(\rho /\rho_{0})^{0.69}$ was found most acceptable
compared with both the MSU isospin diffusion data and the presently acceptable
neutron-skin thickness in $^{208}$Pb. The isospin dependent part $K_{asy}(\rho
_{0})$ of isobaric nuclear incompressibility was further narrowed down to
$-500\pm 50$ MeV. The possibility of determining simultaneously the in-medium
NN cross sections and the symmetry energy was also studied. The proton
transverse flow, or even better the combined transverse flow of neutrons and
protons, can be used as a probe of the in-medium NN cross sections without much
hindrance from the uncertainties of the symmetry energy.


title: Muonic Hydrogen and the Third Zemach Moment

abstract:
  We determine the third Zemach moment of hydrogen (<r^3>_(2)) using only the
world data on elastic electron-proton scattering. This moment dominates the O
(Z alpha)^5 hadronic correction to the Lamb shift in muonic atoms. The
resulting moment, <r^3 >_(2) = 2.71(13) fm^3, is somewhat larger than
previously inferred values based on models. The contribution of that moment to
the muonic hydrogen 2S level is -0.0247(12) meV.


title:
Radii and Binding Energies of Nuclei from a Model of the pn-pair
  Interactions

abstract:
  New formulas to calculate the nuclear charge radii and the nuclear binding
energies have been derived in the framework of an alpha-cluster model. The
particular features of the model are two assumptions that the proton-neutron
pair interactions are responsible for adherence between alpha-clusters and that
the proton and the neutron from a proton-neutron pair have equal nuclear
potentials. These assumptions allow one to determine the charge and Coulomb
radii in dependence on the amount of proton-neutron pairs in the nucleus.
Unlike the Weizsacker's formula to calculate nuclear binding energies, in the
model the binding energies of alpha-clusters and excess neutrons are estimated
separately. The calculated values are in a good agreement with the experimental
data.


title: The nuclear moment of inertia and spin distribution of nuclear levels

abstract:
  We introduce a simple model to calculate the nuclear moment of inertia at
finite temperature. This moment of inertia describes the spin distribution of
nuclear levels in the framework of the spin-cutoff model. Our model is based on
a deformed single-particle Hamiltonian with pairing interaction and takes into
account fluctuations in the pairing gap. We derive a formula for the moment of
inertia at finite temperature that generalizes the Belyaev formula for zero
temperature. We show that a number-parity projection explains the strong
odd-even effects observed in shell model Monte Carlo studies of the nuclear
moment of inertia in the iron region.


title: Hartree-Fock-Bogolyubov calculations with Gaussian expansion method

abstract:
  We extensively develop an algorithm of implementing the
Hartree-Fock-Bogolyubov calculations, in which the Gaussian expansion method is
employed. This algorithm is advantageous in describing the energy-dependent
exponential and oscillatory asymptotics of the quasiparticle wave functions at
large $r$, and in handling various effective interactions including those with
finite ranges. We apply the present method to the oxygen isotopes with the
Gogny interaction, keeping the spherical symmetry. In respect to the new magic
numbers, effects of the pair correlation on the N=16 and 32 nuclei are
investigated.


title:
Refractive Distortions of Two-Particle Correlations from Classical
  Trajectory Calculations

abstract:
  Calculations of two-particle correlations usually assume particles interact
only pair-wise after their final collisions with third bodies. By considering
classical trajectories, we show that interactions with the mean field can alter
the spatial dimensions of the outgoing phase-space-density profiles by tens of
percent, consistent with more complicated quantum complications.


title: A simple analytical calculation of mean-field potential in heavy nuclei

abstract:
  In many-body theory of particles with long range interaction potential, such
as the potential of Newtonian gravity and its relativistic generalization,
Newton-Birkhoff theorem plays a very important role. This theorem is violated
in the case of short range interaction potential, such as the Yukawa potential
in nuclear physics. We discuss the relevance of this in the many-body treatment
of heavy nuclei. In particular, using techniques similar to those in Newtonian
gravity, we calculate analytically the mean-field potential in heavy nuclei.
The mean-field potential thus calculated depends on well known quantities such
as the pion-nucleon coupling constant, inverse pion mass, nuclear radius and
density. The qualitative features of the mean-field potential thus obtained is
similar to the well known phenomenological Wood-Saxon potential.


title: The properties of kaonic nuclei in relativistic mean-field theory

abstract:
  The static properties of some possible light and moderate kaonic nuclei, from
C to Ti, are studied in the relativistic mean-field theory. The 1s and 1p state
binding energies of $K^-$ are in the range of $73\sim 96$ MeV and $22\sim 63$
MeV, respectively. The binding energies of 1p states increase monotonically
with the nucleon number A. The upper limit of the widths are about $42\pm 14$
MeV for the 1s states, and about $71\pm 10$ MeV for the 1p states. The lower
limit of the widths are about $12\pm 4$ MeV for the 1s states, and $21\pm 3$
MeV for the 1p states. If $V_{0}\leq 30$ MeV, the discrete $K^-$ bound states
should be identified in experiment. The shrinkage effect is found in the
possible kaonic nuclei. The interior nuclear density increases obviously, the
densest center density is about $2.1\rho_{0}$.


title:
Non-adiabatic dynamics in 10Be with the microscopic alpha+alpha+N+N
  model

abstract:
  The alpha+6He low-energy reactions and the structural changes of 10Be in the
microscopic alpha+alpha+N+N model are studied by the generalized two-center
cluster model with the Kohn-Hulthen-Kato variation method. It is found that, in
the inelastic scattering to the alpha+6He(2+) channel, characteristic
enhancements are expected as the results of the parity-dependent non-adiabatic
dynamics. In the positive parity state, the enhancement originates from the
excited eigenstate generated by the radial excitation of the relative motion
between two alpha-cores. On the other hand, the enhancement in the negative
parity state is induced by the Landau-Zener level-crossing. These non-adiabatic
processes are discussed in connection to the formation of the inversion doublet
in the compound system of 10Be.


title:
Continuous differential operators and a new interpretation of the
  charmonium spectrum

abstract:
  The definition of the standard differential operator is extended from integer
steps to arbitrary stepsize. The classical, nonrelativistic Hamiltonian is
quantized, using these new continuous operators. The resulting Schroedinger
type equation generates free particle solutions, which are confined in space.
The angular momentum eigenvalues are calculated algebraically. It is shown,
that the charmonium spectrum may be classified by the derived angular momentum
eigenvalues for stepsize=2/3.


title:
The Piecewise Moments Method: A Generalized Lanczos Technique for
  Nuclear Response Surfaces

abstract:
  For some years Lanczos moments methods have been combined with large-scale
shell-model calculations in evaluations of the spectral distributions of
certain operators. This technique is of great value because the alternative, a
state-by-state summation over final states, is generally not feasible. The most
celebrated application is to the Gamow-Teller operator, which governs beta
decay and neutrino reactions in the allowed limit. The Lanczos procedure
determines the nuclear response along a line q=0 in the (omega,q) plane, where
omega and q are the energy and three-momentum transfered to the nucleus.
However, generalizing such treatments from the allowed limit to general
electroweak response functions at arbitrary momentum transfers seems
considerably more difficult: the response function must be determined over the
entire (omega,q) plane for an operator O(q) that is not fixed, but depends
explicitly on q. Such operators arise in any semileptonic process where the
momentum transfer is comparable to (or larger than) the inverse nuclear size.
Here we show, for Slater determinants built on harmonic oscillator basis
functions, that the nuclear response for any multipole operator O(q) can be
determined efficiently over the full response plane by a generalization of the
standard Lanczos moments method. We describe the Piecewise Moments Method and
thoroughly explore its convergence properties for the test case of
electromagnetic responses in a full sd-shell calculation of 28Si. We discuss
possible extensions to a variety of electroweak processes, including charged-
and neutral-current neutrino scattering.


title: Pairing properties of nucleonic matter employing dressed nucleons

abstract:
  A survey of pairing properties of nucleonic matter is presented that includes
the off-shell propagation associated with short-range and tensor correlations.
For this purpose, the gap equation has been solved in its most general form
employing the complete energy and momentum dependence of the normal self-energy
contributions. The latter correlations include the self-consistent calculation
of the nucleon self-energy that is generated by the summation of ladder
diagrams. This treatment preserves the conservation of particle number unlike
approaches in which the self-energy is based on the Brueckner-Hartree-Fock
approximation. A huge reduction in the strength as well as temperature and
density range of ${}^3S_1$-${}^3D_1$ pairing is obtained for nuclear matter as
compared to the standard BCS treatment. Similar dramatic results pertain to
${}^1S_0$ pairing of neutrons in neutron matter.


title: Quarks and Antiquarks in Nuclei

abstract:
  The Chiral Quark-Soliton model provides the quark and antiquark substructure
of the nucleon, which is embedded in nuclear matter. This provides a new way to
asses the effects of the nuclear medium on the nucleon. We calculate nuclear
binding and saturation, describe the European Muon Collaboration (EMC) effect
consistently with Drell-Yan experiments, and predict modifications to the
polarized parton distributions. We also calculate the electromagnetic form
factors of a bound proton, and find significant modifications of the
electromagnetic form factors in the nuclear environment. In every case, the
properties of the sea of quark-antiquark pairs in the nucleon are very
important, and serve to mitigate the valence quark effect. The changes in the
sea quarks when the nucleon is immersed in the nuclear medium are the primary
mode by which consistency is maintained with experimental constraints
(Drell-Yan data, magnetic moment), while still maintaining a significant effect
needed to explain the deep inelastic scattering and polarization transfer data.


title: Proton radii and two-photon exchange

abstract:
  We investigate the effect of two-photon exchange processes upon the rms- and
Zemach radii extracted from electron-proton scattering. We find that the
changes are small and do not help to explain the discrepancy between
experimental and calculated HFS in the hydrogen atom.


title: Exactly Solvable Model for the Decay of Superdeformed Nuclei

abstract:
  The history and importance of superdeformation in nuclei is briefly
discussed. A simple two-level model is then employed to obtain an elegant
expression for the branching ratio for the decay via the E1 process in the
normal-deformed band of superdeformed nuclei. From this expression, the
spreading width Gamma^downarrow for superdeformed decay is found to be
determined completely by experimentally known quantities. The accuracy of the
two-level approximation is verified by considering the effects of other
normal-deformed states. Furthermore, by using a statistical model of the energy
levels in the normal-deformed well, we can obtain a probabilistic expression
for the tunneling matrix element V.


title: A new analysis of 14O beta decay: branching ratios and CVC consistency

abstract:
  The ground-state Gamow-Teller transition in the decay of 14O is strongly
hindered and the electron spectrum deviates markedly from the allowed shape. A
reanalysis of the only available data on this spectrum changes the branching
ratio assigned to this transition by seven standard deviations: our new result
is (0.54 \pm 0.02)%. The Kurie plot data from two earlier publications are also
examined and a revision to their published branching ratios is recommended. The
required nuclear matrix elements are calculated with the shell model and, for
the first time, consistency is obtained between the M1 matrix element deduced
from the analog gamma transition in 14N and that deduced from the slope of the
shape-correction function in the beta transition, a requirement of the
conserved vector current hypothesis. This consistency is only obtained,
however, if renormalized rather than free-nucleon operators are used in the
shell-model calculations. In the mirror decay of 14C a similar situation
occurs. Consistency between the 14C lifetime, the slope of the shape-correction
function and the M1 matrix element from gamma decay can only be achieved with
renormalized operators in the shell-model calculation.


title: Behavior of shell-model configuration moments

abstract:
  An important input into reaction theory is the density of states or the level
density. Spectral distribution theory (also known as nuclear statistical
spectroscopy) characterizes the secular behavior of the density of states
through moments of the Hamiltonian. One particular approach is to partition the
model space into subspaces and find the moments in those subspaces; a
convenient choice of subspaces are spherical shell-model configurations. We
revisit these configuration moments and find, for complete $0\hbar\omega$
many-body spaces, the following behaviors: (a) the configuration width is
nearly constant for all configurations; (b) the configuration asymmetry or
third moment is strongly correlated with the configuration centroid; (c) the
configuration fourth moment, or excess is linearly related to the square to the
configuration asymmetry. Such universal behavior may allow for more efficient
modeling of the density of states in a shell-model framework.


title: Isospin relations for four nucleons in a single j shell

abstract:
  We had previously used techniques involving isospin to count the number of
states for three identical fermions in a single j shell with total angular
momentum I=j. We generalize this to all I, but the main thrust of this work is
to consider now a 4-fermion system. As before, one evaluates the eigenvalues of
the Hamiltonian \sum_{i<j}[a + bt(i)t(j)] both from an isospin point of view
and an angular momentum point of view. In the 4-particle case, we get a more
limited result than in the 3-particle case, namely the number of T=0 states
minus twice the number of T=2 states, all of a given angular momentum I.


title:
The $^4$He$(e,e^\prime p)^3$H Reaction with Full Final--State
  Interaction

abstract:
  An {\it ab initio} calculation of the $^4$He$(e,e^\prime p)^3$H longitudinal
response is presented. The use of the integral transform method with a Lorentz
kernel has allowed to take into account the full four--body final state
interaction (FSI). The semirealistic nucleon-nucleon potential MTI--III and the
Coulomb force are the only ingredients of the calculation. The reliability of
the direct knock--out hypothesis is discussed both in parallel and in non
parallel kinematics. In the former case it is found that lower missing momenta
and higher momentum transfers are preferable to minimize effects beyond the
plane wave impulse approximation (PWIA). Also for non parallel kinematics the
role of antisymmetrization and final state interaction become very important
with increasing missing momentum, raising doubts about the possibility of
extracting momentum distributions and spectroscopic factors. The comparison
with experimental results in parallel kinematics, where the Rosenbluth
separation has been possible, is discussed.


title: Thermal Radiation from Au + Au Collisions at \sqrt{s} = 200 GEV/A Energy

abstract:
  The transverse momentum distribution of the direct photons measured by the
PHENIX collaboration in $Au + Au$ collisions at $\sqrt{s}=200$ GeV/A has been
analyzed. It has been shown that the data can be reproduced reasonably well
assuming a deconfined state of thermalized quarks and gluons with initial
temperature more than the transition temperature for deconfinement inferred
from lattice QCD. The value of the initial temperature depends on the equation
of state of the evolving matter. The sensitivities of the results on various
input parameters have been studied. The effects of the modifications of
hadronic properties at non-zero temperature have been discussed.


title: Dynamical response of the nuclear pasta in neutron star crusts

abstract:
  The nuclear pasta -- a novel state of matter having nucleons arranged in a
variety of complex shapes -- is expected to be found in the crust of neutron
stars and in core-collapse supernovae at subnuclear densities of about
$10^{14}$ g/cm$^3$. Due to frustration, a phenomenon that emerges from the
competition between short-range nuclear attraction and long-range Coulomb
repulsion, the nuclear pasta displays a preponderance of unique low-energy
excitations. These excitations could have a strong impact on many transport
properties, such as neutrino propagation through stellar environments. The
excitation spectrum of the nuclear pasta is computed via a molecular-dynamics
simulation involving up to 100,000 nucleons. The dynamic response of the pasta
displays a classical plasma oscillation in the 1-2 MeV region. In addition,
substantial strength is found at low energies. Yet this low-energy strength is
missing from a simple ion model containing a single-representative heavy
nucleus. The low-energy strength observed in the dynamic response of the pasta
is likely to be a density wave involving the internal degrees of freedom of the
clusters.


title:
High-energy behavior of the nuclear symmetry potential in asymmetric
  nuclear matter

abstract:
  Using the relativistic impulse approximation with empirical NN scattering
amplitude and the nuclear scalar and vector densities from the relativistic
mean-field theory, we evaluate the Dirac optical potential for neutrons and
protons in asymmetric nuclear matter. From the resulting Schr\"{o}%
dinger-equivalent potential, the high energy behavior of the nuclear symmetry
potential is studied. We find that the symmetry potential at fixed baryon
density is essentially constant once the nucleon kinetic energy is greater than
about 500 MeV. Moreover, for such high energy nucleon, the symmetry potential
is slightly negative below a baryon density of about $% \rho =0.22$ fm$^{-3}$
and then increases almost linearly to positive values at high densities. Our
results thus provide an important constraint on the energy and density
dependence of nuclear symmetry potential in asymmetric nuclear matter.


title: Resonance states in the $^{12}$C+$^{12}$C modified Morse potential

abstract:
  The resonances in $^{12}$C+$^{12}$C system described earlier using long range
Morse potential determined from resonance data itself, are reexamined in the
light of the recent development of the two new methods for identification of
resonances in the scattering theory, namely Imaginary Test Potential and
Imaginary Phase-shift methods. The high lying resonances are found to be not
genuine as pointed out by Kato and Abe, and as such are discarded. This
discomfiture is due to the (i) shallow behavior of the Morse potential at the
outer edge and (ii) inappropriate insertion of Coulomb tail used in that work.
These two deficiencies are now removed in the present study by finding a
modified Morse potential with steep rise in the outer edge, and joining
smoothly to it a term approximating the Coulomb tail. Calculation of the
resonances for this modified Morse potential using the above two methods of
identification of resonances in our study, yields more than 25 states with
angular momenta $0^{+}$ - $12^{+}$ in the relevant energy regions. This
reaffirms the diatomic-like rotational and vibrational picture of the nuclear
molecular resonances in $^{12}$C+$^{12}$C system proposed earlier, and shows
close resemblance with the physics of diatomic molecules, a phenomenon
belonging to altogether a different area. It is revealing that the similarity
extends right upto the level of potential which is Morse type in both the
cases. This study also reveals new features of heavy ion potential.


title: Test of modified BCS model at finite temperature

abstract:
  A recently suggested modified BCS (MBCS) model has been studied at finite
temperature. We show that this approach does not allow the existence of the
normal (non-superfluid) phase at any finite temperature. Other MBCS predictions
such as a negative pairing gap, pairing induced by heating in closed-shell
nuclei, and ``superfluid -- super-superfluid'' phase transition are discussed
also. The MBCS model is tested by comparing with exact solutions for the picket
fence model. Here, severe violation of the internal symmetry of the problem is
detected. The MBCS equations are found to be inconsistent. The limit of the
MBCS applicability has been determined to be far below the ``superfluid --
normal'' phase transition of the conventional FT-BCS, where the model performs
worse than the FT-BCS.


title: Two-Body Electrodisintegration of $^3$He at High Momentum Transfer

abstract:
  The $^3$He$(e,e^\prime p)$$d$ reaction is studied using an accurate
three-nucleon bound state wave function, a model for the electromagnetic
current operator including one- and two-body terms, and the Glauber
approximation for the treatment of final state interactions. In contrast to
earlier studies, the profile operator in the Glauber expansion is derived from
a nucleon-nucleon scattering amplitude, which retains its full spin and isospin
dependence and is consistent with phase-shift analyses of two-nucleon
scattering data. The amplitude is boosted from the center-of-mass frame, where
parameterizations for it are available, to the frame where rescattering occurs.
Exact Monte Carlo methods are used to evaluate the relevant matrix elements of
the electromagnetic current operator. The predicted cross section is found to
be in quantitative agreement with the experimental data for values of the
missing momentum $p_{\rm m}$ in the range (0--700) MeV/c, but underestimates
the data at $p_{\rm m} \simeq 1$ GeV/c by about a factor of two. However, the
longitudinal-transverse asymmetry, measured up to $p_{\rm m} \simeq$ 600 MeV/c,
is well reproduced by theory. A critical comparison is carried out between the
results obtained in the present work and those of earlier studies.


title:
Study of Lattice QCD Form Factors Using the Extended Gari-Krumpelmann
  Model

abstract:
  We explore the suitability of a modern vector meson dominance (VMD) model as
a method for chiral extrapolation of nucleon electromagnetic form factor
simulations in lattice QCD. It is found that the VMD fits to experimental data
can be readily generalized to describe the lattice simulations. However, the
converse is not true. That is, the VMD form is unsuitable as a method of
extrapolation of lattice simulations at large quark mass to the physical
regime.


title: Low-lying isovector monopole resonances

abstract:
  The mass difference between the even-even isobaric nuclei having the valence
nucleons on the same degenerate level is attributed to a Josephson-type
interaction between pairs of protons and pairs of neutrons. This interaction
can be understood as an isospin symmetry-breaking mean field for a
four-particle interaction separable in the two particles-two holes channel. The
strength of this mean field is estimated within an o(5) algebraic model, by
using the experimental value of the inertial parameter for the collective
isorotation induced by the breaking of the isospin symmetry. In superfluid
nuclei, the presumed interaction between the proton and neutron condensates
leads to coupled oscillations of the BCS gauge angles, which should appear in
the excitation spectrum as low-lying isovector monopole resonances.


title:
Representations in Density Dependent Hadronic Field Theory and
  compatibility with QCD sum-rules

abstract:
  Different representations of an effective, covariant theory of the hadronic
interaction are examined. For this purpose we have introduced nucleon-meson
vertices parametrized in terms of scalar combinations of hadronic fields,
extending the conceptual frame of the Density Dependent Hadronic Field Theory.
Nuclear matter properties at zero temperature are examined in the Mean Field
Approximation, including the equation of state, the Landau parameters, and
collective modes. The treatment of isospin channels in terms of QCD sum rules
inputs is outlined.


title: Global study of quadrupole correlation effects

abstract:
  We discuss the systematics of ground-state quadrupole correlations of binding
energies and mean-square charge radii for all even-even nuclei, from O16 up to
the superheavies, for which data are available. To that aim we calculate their
correlated J=0 ground state by means of the angular-momentum and
particle-number projected generator coordinate method, using the axial mass
quadrupole moment as the generator coordinate and self-consistent mean-field
states only restricted by axial, parity, and time-reversal symmetries. The
calculation is performed within the framework of a non-relativistic
self-consistent mean-field model using the same non-relativistic Skyrme
interaction SLy4 and a density-dependent pairing force to generate the
mean-field configurations and mix them. (See the paper for the rest of the
abstract).


title:
Beam normal spin asymmetry of elastic $eN$ scattering in the leading
  logarithm approximation

abstract:
  The beam normal spin asymmetry for the elastic $eN$ scattering is studied in
the leading logarithm approximation. We derive the expression for the
asymmetry, which is valid for any scattering angles. The result is compared
with the results of other authors, obtained for the forward kinematics. We also
calculate the numerical values of the asymmetry at intermediate energy and show
that they are consistent with existing experimental data.


title: Pairing schemes for HFB calculations of nuclei

abstract:
  Several pairing schemes currently used to describe superfluid nuclei through
Hartree-Fock-Bogolyubov (HFB) calculations are briefly reviewed. We put a
particular emphasis on the regularization recipes used in connection with
zero-range forces and on the density dependence which usually complement their
definition. Regarding the chosen regularization process, the goal is not only
to identify the impact it may or may not have on pairing properties of nuclei
through spherical 1D HFB calculations but also to assess its tractability for
systematic axial 2D and 3D mean-field and beyond-mean-field calculations.


title: Heavy-Quark Probes of the Quark-Gluon Plasma at RHIC

abstract:
  Thermalization and collective flow of charm (c) and bottom (b) quarks in
ultra-relativistic heavy-ion collisions are evaluated based on elastic parton
rescattering in an expanding quark-gluon plasma (QGP). We show that resonant
interactions in a strongly interacting QGP (sQGP), as well as the effects of
parton coalescence, can play an essential role in the interpretation of recent
data from the Relativistic Heavy-Ion Collider (RHIC), and thus illuminate the
nature of the sQGP and its hadronization. Our main assumption, motivated by
recent findings in lattice computations of Quantum Chromodynamics, is the
existence of D- and B-meson states in the sQGP, providing resonant cross
sections for heavy quarks up to temperatures of sim 2 T_c. Pertinent drag and
diffusion coefficients are implemented into a relativistic Langevin simulation
to compute transverse-momentum spectra and azimuthal asymmetries (v_2) of b-
and c-quarks in Au-Au collisions at RHIC. Hadronization into D- and B-mesons is
calculated from a combination of coalescence with light quarks and
fragmentation, and associated electron-decay spectra and v_2 are compared to
recent RHIC data. We also comment on the relative importance of radiative and
elastic energy loss of heavy quarks in the QGP.


title: Proton-neutron pairing energies in N=Z nuclei at finite temperature

abstract:
  Thermal behavior of isoscalar and isovector proton-neutron (pn) pairing
energies at finite temperature are investigated by the shell model
calculations. These pn pairing energies can be estimated by double differences
of "thermal" energies which are extended from the double differences of binding
energies as the indicators of pn pairing energies at zero temperature. We found
that the delicate balance between isoscalar and isovector pn pairing energies
at zero temperature disappears at finite temperature. When temperature rises,
while the isovector pn pairing energy decreases, the isoscalar pn pairing
energy rather increases. We discuss also the symmetry energy at finite
temperature.


title:
Dipole resonances in light neutron-rich nuclei studied with
  time-dependent calculations of antisymmetrized molecular dynamics

abstract:
  In order to study isovector dipole response of neutron-rich nuclei, we have
applied a time-dependent method of antisymmetrized molecular dynamics. The
dipole resonances in Be, B and C isotopes have been investigated. In $^{10}$Be,
$^{15}$B, $^{16}$C, collective modes of the vibration between a core and
valence neutrons cause soft resonances at the excitation energy $E_x=10-15$ MeV
below the giant dipole resonance(GDR). In $^{16}$C, we found that a remarkable
peak at $E_x=14$ MeV corresponds to coherent motion of four valence neutrons
against a $^{12}$C core, while the GDR arises from the core vibration in the
$E_x >20$ MeV region. In $^{17}$B and $^{18}$C, the dipole strengths in the low
energy region decline compared with those in $^{15}$B and $^{16}$C. We also
discuss the energy weighted sum rule for the $E1$ transitions.


title: Pairing correlations in nuclei on the neutron-drip line

abstract:
  Paring correlations in weakly bound nuclei on the edge of neutron drip line
is studied by using a three-body model. A density-dependent contact interaction
is employed to calculate the ground state of halo nuclei $^{6}$He and
$^{11}$Li, as well as a skin nucleus $^{24}$O. Dipole excitations in these
nuclei are also studied within the same model. We point out that the di-neutron
type correlation plays a dominant role in the halo nuclei $^{6}$He and
$^{11}$Li having the coupled spin of the two neutrons $S$=0, while the
correlation similar to the BCS type is important in $^{24}$O. Contributions of
the spin $S$=1 and S=0 configurations are separately discussed in the low
energy dipole excitations.


title: Improving the Feshbach-Rubinow approximation

abstract:
  The binding energy of three identical bosons is estimated by coupled
differential equations which generalise the Feshbach--Rubinow approximation.
This method turns out to be rather efficient, especially in the limit of
vanishing binding.


title:
Spin observables in antiproton-proton to AntiLambda-Lambda and
  density-matrix constraints

abstract:
  The positivity conditions of the spin density matrix constrain the spin
observables of the reaction antiproton-proton to AntiLambda-Lambda, leading to
model-independent, non-trivial inequalities. The formalism is briefly presented
and examples of inequalities are provided.


title: Dynamics of hyperon--antihyperon production

abstract:
  The dynamics of the strangeness-exchange reactions antiproton-proton to
AntiLambda-Lambda, AntiLambda-Sigma or AntiSigma-Sigma is discussed, either at
the hadron level, in terms of strange-meson exchange, or at the quark level, in
terms of quark--antiquark creation or annihilation.


title: Quark Matter 2005 -- Theoretical Summary

abstract:
  This is a review of the latest developments in the theory of superdense
nuclear matter, formed in relativistic heavy ion collisions or in the core of
collapsed stars, as they were reported and discussed at the Quark Matter 2005
conference in Budapest (Hungary).


title: Spectral properties of nuclear matter

abstract:
  We review self-consistent spectral methods for nuclear matter calculations.
The in-medium T-matrix approach is conserving and thermodynamically consistent.
It gives both the global and the single-particle properties the system. The
T-matrix approximation allows to address the pairing phenomenon in cold nuclear
matter. A generalization of nuclear matter calculations to the superfluid phase
is discussed and numerical results are presented for this case. The linear
response of a correlated system going beyond the
Hartree-Fock+Random-Phase-Approximation scheme is studied. The polarization is
obtained by solving a consistent Bethe-Salpeter equation for the coupling of
dressed nucleons to an external field. We find that multipair contributions are
important for the spin(isospin) response when the interaction is spin(isospin)
dependent.


title: Helicity-dependent photoabsorption cross sections on the nucleon

abstract:
  We examine the energy dependence of single-meson photoproduction as it
contributes to the Gerasimov-Drell-Hearn (GDH) sum rule. For photon energies
above approximately 1 GeV, through the full resonance region, this contribution
dominates the proton sum rule integral. Over the same energy region, our
single-pion contribution to the neutron sum rule also qualitatively follows a
recent set of GDH data. The predicted neutral-pion contribution to the neutron
sum rule is nearly zero above 1 GeV in this result. The SAID and Mainz (MAID)
results are very different for a number of observables over this energy region.


title:
Effect of isovector-scalar meson on neutron star matter in strong
  magnetic fields

abstract:
  We study the effects of isovector-scalar meson $\delta$ on the equation of
state (EOS) of neutron star matter in strong magnetic fields. The EOS of
neutron-star matter and nucleon effective masses are calculated in the
framework of Lagrangian field theory, which is solved within the mean-field
approximation. From the numerical results one can find that the $\delta$-field
leads to a remarkable splitting of proton and neutron effective masses. The
strength of $\delta$-field decreases with the increasing of the magnetic field
and is little at ultrastrong field. The proton effective mass is highly
influenced by magnetic fields, while the effect of magnetic fields on the
neutron effective mass is negligible. The EOS turns out to be stiffer at $B <
10^{15}$G but becomes softer at stronger magnetic field after including the
$\delta$-field. The AMM terms can affect the system merely at ultrastrong
magnetic field($B > 10^{19}$G). In the range of $10^{15}$ G -- $10^{18}$ G the
properties of neutron-star matter are found to be similar with those without
magnetic fields.


title: Pairing in Nuclei

abstract:
  Simple generic aspects of nuclear pairing in homogeneous medium as well as in
finite nuclei are discussed. It is argued that low-energy nuclear structure is
not sensitive enough to resolve fine details of nuclear nucleon-nucleon (NN)
interaction in general and pairing NN interaction in particular what allows for
regularization of the ultraviolet (high-momentum) divergences and a consistent
formulation of effective superfluid local theory. Some aspects of
(dis)entanglement of pairing with various other effects as well as forefront
ideas concerning isoscalar pairing are also briefly discussed.


title:
NA60 and BR Scaling in Terms of the Vector Manifestation: A Model
  Approach

abstract:
  It is pointed out that the comparison between the recent NA60 dimuon data and
the so-called "Brown-Rho (BR) scaling" as presented at QM2005 is $not$ founded
on a correct interpretation of the prediction of BR scaling as formulated in
1991 and modernized recently and hence the conclusion drawn by both the
experimental and theoretical speakers that "BR scaling is ruled out by NA60" is
erroneous and should be disregarded. We use a simplified model description of
how the vector manifestation of hidden local symmetry theory enters into the
dilepton production, relegating more rigorous discussions to a follow-up paper.


title:
NA60 and BR Scaling In Terms of The Vector Manifestation: Formal
  Consideration

abstract:
  The arguments developed in the preceding article on how BR scaling would
predict for dilepton production in heavy-ion collisions, e.g., NA60, are
augmented with more precise and rigorous arguments.


title: X(5) Critical-Point Structure in a Finite System

abstract:
  X(5) is a paradigm for the structure at the critical point of a particular
first-order phase transition for which the intrinsic energy surface has two
degenerate minima separated by a low barrier. For a finite system, we show that
the dynamics at such a critical point can be described by an effective
deformation determined by minimizing the energy surface after projection onto
angular momentum zero, and combined with two-level mixing. Wave functions of a
particular analytic form are used to derive estimates for energies and
quadrupole rates at the critical point.


title:
Use of V_{low-k} in a chiral-perturbation-theory description of the
  $pp\to pp\pi^0$ reaction

abstract:
  Previously, the near-threhold $pp\to pp\pi^0$ reaction was studied with the
use of transition operators derived from chiral perturbation theory ($\chi$PT)
and the nuclear wave functions generated by high-precision phenomenological
potentials. A conceptual problem in that approach was that the transition
amplitude receives contributions from very high momentum components (above the
cutoff scale of $\chi$PT) in the nuclear wave functions. In the present work,
we avoid this problem by replacing the "bare" phenomenological potentials with
V_{low-k}, which is an effective potential derived from a bare potential by
integrating out momentum components higher than a specified cutoff scale. The
use of V_{low-k} is found to give an enhancement of the $pp\to pp\pi^0$ cross
sections over the values obtained with bare potentials. Although this
enhancement brings the calculated cross sections closer to the experimental
values, the incident-energy dependence of the cross section is not well
reproduced, a problem that seems to indicate the necessity of including higher
chiral order terms than considered in the present work.


title:
Electromagnetic form factors of the nucleon in chiral perturbation
  theory including vector mesons

abstract:
  We calculate the electromagnetic form factors of the nucleon up to fourth
order in manifestly Lorentz-invariant chiral perturbation theory with vector
mesons as explicit degrees of freedom. A systematic power counting for the
renormalized diagrams is implemented using both the extended on-mass-shell
renormalization scheme and the reformulated version of infrared regularization.
We analyze the electric and magnetic Sachs form factors, $G_E$ and $G_M$, and
compare our results with the existing data. The inclusion of vector mesons
results in a considerably improved description of the form factors. We observe
that the most dominant contributions come from tree-level diagrams, while loop
corrections with internal vector meson lines are small.


title:
Extended quark mass density- and temperature- dependent model and the
  deconfinement phase transition

abstract:
  An extended quark mass density- and temperature- dependent model which
includes the couplings between quarks and the sigma-mesons, omega-mesons is
suggested. The MIT bag boundary constrain has been given up and the
interactions between quarks and mesons are extended to the whole free space. We
show that the present model is successful to describe both the saturation
properties and the deconfinement phase transition of nuclear matter. When the
effective nucleon masses vanish and the bag radius tends to infinite, the quark
deconfinement takes place. The corresponding QGP phase diagram is addressed.


title: Symmetries in physics

abstract:
  The concept of symmetries in physics is briefly reviewed. In the first part
of these lecture notes, some of the basic mathematical tools needed for the
understanding of symmetries in nature are presented, namely group theory, Lie
groups and Lie algebras, and Noether's theorem. In the second part, some
applications of symmetries in physics are discussed, ranging from isospin and
flavor symmetry to more recent developments involving the interacting boson
model and its extension to supersymmetries in nuclear physics.


title: Sensitivity to multi-phonon excitations in heavy-ion fusion reactions

abstract:
  Measured cross sections for the fusion of {64}Ni with {64}Ni, {74}Ge, and
{100}Mo targets are analyzed in a coupled-channels approach. The data for the
{64}Ni target above 0.1 mb are reproduced by including couplings to the
low-lying 2^+ and 3^- states and the mutual and two-phonon excitations of these
states. The calculations become more challenging as the fusing nuclei become
softer and heavier, and excitations to multi-phonon states start to play an
increasingly important role. Thus it is necessary to include up to four-phonon
excitations in order to reproduce the data for the {64}Ni+{74}Ge system.
Similar calculations for {64}Ni+{100}Mo, and also for the symmetric
{74}Ge+{74}Ge system, show large discrepancies with the data. Possible ways to
improve the calculations are discussed.


title:
Nuclear matter symmetry energy and the neutron skin thickness of heavy
  nuclei

abstract:
  Correlations between the thickness of the neutron skin in finite nuclei and
the nuclear matter symmetry energy are studied in the Skyrme Hartree-Fock
model. From the most recent analysis of the isospin diffusion data in heavy-ion
collisions based on an isospin- and momentum-dependent transport model with
in-medium nucleon-nucleon cross sections, a value of $L=88\pm 25$ MeV for the
slope of the nuclear symmetry energy at saturation density is extracted, and
this imposes stringent constraints on both the parameters in the Skyrme
effective interactions and the neutron skin thickness of heavy nuclei.
Predicted thickness of the neutron skin is $0.22\pm 0.04$ fm for $% ^{208}$Pb,
$0.29\pm 0.04$ fm for $^{132}$Sn, and $0.22\pm 0.04$ fm for $% ^{124}$Sn.


title:
The isovector effective charge and the staggering of the 2+ to 0+
  transition probabilities in the Titanium isotopes

abstract:
  In an effort to understand the magical status of N=32 and N=34 at the very
neutron rich edge, experiments have been carried out in the Titanium isotopes
up to A=56. The measured staggering of the B(E2)'s is not reproduced by the
shell model calculations using the best effective interactions. We argue that
this may be related to the choice of the isovector effective charge and to the
value of the N=34 neutron gap.


title:
More on nucleon-nucleon cross sections in symmetric and asymmetric
  matter

abstract:
  Following a recent work, we present numerical results for total two-nucleon
effective cross sections in isospin symmetric and asymmetric matter. The
present calculations include the additional effect of Pauli blocking of the
final states.


title:
The leading asymptotic terms of the three-body Coulomb scattering wave
  function

abstract:
  The asymptotic wave function derived by Alt and Mukhamedzhanov [Phys. Rev. A
47, 2004 (1993)] and Mukhamedzhanov and Lieber [Phys. Rev. A 54, 3078 (1996)]
has been refined in the region where the pair $ (\beta,\gamma)$ remains close
to each other while the third particle $\alpha$ is far away from them
$(\rho_{\alpha} \to \infty$, $r_{\alpha}/\rho_{\alpha}\to 0)$. The improved
wave function satisfies the Schr\"odinger equation up to the terms of order
$O(1/{\rho_{\alpha}}^{3})$, provides the leading asymptotic terms of the
three-body scattering wave function with Coulomb interactions and gives further
insight into the continuum behavior of the three-charged-particle wave function
and helps to obtain $3\to 3$ scattered wave. This opens up further ways of
solving and analysing the three-body Schr\"odinger equation by numerical means.


title:
Origin of the drastic decrease of fusion probability in superheavy mass
  region

abstract:
  The fusion-fission process in the superheavy mass region is studied
systematically by solving the time evolution of nuclear shape in
three-dimensional deformation space using the Langevin equation. By analyzing
the trajectory in the deformation space, we identify the critical area when the
trajectory's destination is determined to be the fusion or the quasi-fission
process. It is also clarified that the potential landscape around the critical
area is crucial for estimating the fusion probability, and its dependence on
the atomic number is presented.


title:
Equation of state for asymmetric nuclear matter with infinite-order
  summation of ring diagrams

abstract:
  The particle-particle hole-hole ring-diagram summation method is employed to
obtain the equation of state of asymmetric nuclear matter over a wide range of
asymmetry fraction. Compared with Brueckner Hartree-Fock and model-space
Brueckner Hartree-Fock calculations, this approach gives a softer equation of
state, increased symmetry energy and a lower value for the incompressibility
modulus which agrees quite well with the values used in the hydrodynamical
model for the supernovae explosion.


title: Backbending phenomena in light nuclei at A~60 mass region

abstract:
  Recent studies of the backbending phenomenon in medium light weight nuclei
near A~60 expanded greatly our interest about how the single particle orbits
are nonlinearly affected by the collective motion. As a consequence we have
applied a modi…ed version of the exponential model with the inclusion of
paring correlation to describe the energy spectra of the ground state bands
and/or the backbending phenomenon in mass region at A~60. A firm conclusion is
obtained concerning the successful validity of the proposed modified model in
describing the backbending phenomenon in this region. Comparison with different
theoretical descriptions is discussed.


title: Hans Bethe: The Nuclear Many Body Problem

abstract:
  We discuss the work of Hans Bethe and others in formulating a theoretical
foundation for the nuclear shell model. Written for a general audience, this
article describes the evolution from Brueckner's reaction matrix theory to the
Moszkowski-Scott separation method and ultimately to the Reference Spectrum
method of Bethe, Brandow, and Petschek. We also discuss connections with the
recently developed low momentum nucleon-nucleon interactions.


title:
Cold dilute neutron matter on the lattice I: Lattice virial coefficients
  and large scattering lengths

abstract:
  We study cold dilute neutron matter on the lattice using an effective field
theory. We work in the unitary limit in which the scattering length is much
larger than the interparticle spacing. In this paper we focus on the equation
of state at temperatures above the Fermi temperature and compare lattice
simulations to the virial expansion on the lattice and in the continuum. We
find that in the unitary limit lattice discretization errors in the second
virial coefficient are significantly enhanced. As a consequence the equation of
state does not show the universal scaling behavior expected in the unitary
limit. We suggest that scaling can be improved by tuning the second virial
coefficient rather than the scattering length.


title:
Cold dilute neutron matter on the lattice II: Results in the unitary
  limit

abstract:
  This is the second of two papers which investigate cold dilute neutron matter
on the lattice using pionless effective field theory. In the unitary limit,
where the effective range is zero and scattering length is infinite, simple
scaling relations relate thermodynamic functions at different temperatures.
When the second virial coefficient is properly tuned, we find that the lattice
results obey these scaling relations. We compute the energy per particle,
pressure, spin susceptibility, dineutron correlation function, and an upper
bound for the superfluid critical temperature.


title:
Insensitivity of the elastic proton-nucleus reaction to the neutron
  radius of 208Pb

abstract:
  The sensitivity--or rather insensitivity--of the elastic proton-nucleus
reaction to the neutron radius of 208Pb is investigated using a
non-relativistic impulse-approximation approach. The energy region (Tlab=500
MeV and Tlab=800 MeV) is selected so that the impulse approximation may be
safely assumed. Therefore, only free nucleon-nucleon scattering data are used
as input for the optical potential. Further, the optical potential includes
proton and neutron ground-state densities that are generated from
accurately-calibrated models. Even so, these models yield a wide range of
values (from 0.13 fm to 0.28 fm) for the poorly known neutron skin thickness in
208Pb. An excellent description of the experimental cross section is obtained
with all neutron densities. We have invoked analytic insights developed within
the eikonal approximation to understand the insensitivity of the differential
cross section to the various neutron densities. As the diffractive oscillations
of the cross sections are controlled by the matter radius of the nucleus, the
large spread in the neutron skin among the various models gets diluted into a
mere 1.5% difference in the matter radius. This renders ineffective the elastic
reaction as a precision tool for the measurement of neutron radii.


title: Effective Lagrangian Approach to pion photoproduction from the nucleon

abstract:
  We present a pion photoproduction model on the free nucleon based on an
Effective Lagrangian Approach (ELA) which includes the nucleon resonances
($\Delta(1232)$, N(1440), N(1520), N(1535), $\Delta (1620)$, N(1650), and
$\Delta (1700)$), in addition to Born and vector meson exchange terms. The
model incorporates a new theoretical treatment of spin-3/2 resonances, first
introduced by Pascalutsa, avoiding pathologies present in previous models.
Other main features of the model are chiral symmetry, gauge invariance, and
crossing symmetry. We use the model combined with modern optimization
techniques to assess the parameters of the nucleon resonances on the basis of
world data on electromagnetic multipoles. We present results for
electromagnetic multipoles, differential cross sections, asymmetries, and total
cross sections for all one pion photoproduction processes on free nucleons. We
find overall agreement with data from threshold up to 1 GeV in laboratory
frame.


title:
Effective three-body interactions in the alpha-cluster model for the
  ^{12}C nucleus

abstract:
  Properties of the lowest $0^{+}$ states of $^{12}\mathrm{C}$ are calculated
to study the role of three-body interactions in the $\alpha$-cluster model. An
additional short-range part of the local three-body potential is introduced to
incorporate the effects beyond the $\alpha$-cluster model. There is enough
freedom in this potential to reproduce the experimental values of the
ground-state and excited-state energies and the ground-state root-mean-square
radius. The calculations reveal two principal choices of the two-body and
three-body potentials. Firstly, one can adjust the potentials to obtain the
width of the excited $0_2^+$ state and the monopole $0_2^+ \to 0_1^+ $
transition matrix element in good agreement with the experimental data. In this
case, the three-body potential has strong short-range attraction supporting a
narrow resonance above the $0_2^+$ state, the excited-state wave function
contains a significant short-range component, and the excited-state
root-mean-square radius is comparable to that of the ground state. Next,
rejecting the solutions with an additional narrow resonance, one finds that the
excited-state width and the monopole transition matrix element are insensitive
to the choice of the potentials and both values exceed the experimental ones.


title: Superscaling and Charge-changing Neutrino Cross Sections

abstract:
  The superscaling function extracted from inclusive electron scattering data
is used to predict high energy charge-changing neutrino cross sections in the
quasi-elastic and $\Delta$ regions.


title:
Spin observables of the reactions NN -> DeltaN and pd -> Delta (pp)(1S0)
  in collinear kinematics

abstract:
  A general formalism for double and triple spin-correlations of the reaction
NN -> DeltaN is developed for the case of collinear kinematics. A complete
polarization experiment allowing to reconstruct all of the four amplitudes
describing this process is suggested. Furthermore, the spin observables of the
inelastic charge-exchange reaction pd -> Delta^0(pp)(1S0) are analyzed in
collinear kinematics within the single pN scattering mechanism involving the
subprocess pn -> Delta^0p. The full set of spin observables related to the
polarization of one or two initial particles and one final particle is obtained
in terms of three invariant amplitudes of the reaction pd -> Delta (pp)(1S0)
and the transition form factor d->(pp)(1S0). A complete polarization experiment
for the reaction pd -> Delta^0(pp)(1S0) is suggested which allows one to
determine three independent combinations of the four amplitudes of the
elementary subprocess NN -> DeltaN.


title:
Relativistic mean field study of neutron rich even-even C and Be
  isotopes

abstract:
  Ground state properties of neutron rich even-even Be and C nuclei have been
investigated using Relativistic Mean Field approach in co-ordinate space. The
positions of the neutron drip line are correctly predicted for both the
elements. The nucleus $^{14}$Be shows a two neutron halo but, contrary to
expectation, $^{22}$C does not exhibit any halo structure. In carbon nuclei,
N=16 comes out as a new magic number. The single particle level ordering
observed in stable nuclei is found to be modified in neutron rich Be isotopes.
Elastic partial scattering cross sections for proton scattering in inverse
kinematics have been calculated using the theoretically obtained densities for
some of the nuclei and compared with available experimental data. The total
cross cross sections for elastic scattering have also been calculated for all
the nuclei studied showing a large increase for the halo nucleus $^{14}$Be. The
nuclei have also been investigated for deformation. The nuclei $^{10}$Be and
$^{16,18,20}$C are observed to be deformed in their ground state.


title:
Solution of the microscopic gap equation for a slab of nuclear matter
  with the Paris NN-potential

abstract:
  The gap equation in the $^1S_0$-channel is solved for a nuclear slab with the
separable form of the Paris potential. The gap equation is considered in the
model space in terms of the effective pairing interaction which is found in the
complementary subspace. The absolute value of the gap $\Delta$ turned out to be
very sensitive to the cutoff $K_{max}$ in the momentum space in the equation
for the effective interaction. It is necessary to take $K_{max}=160-180
fm^{-1}$ to guarantee 1% accuracy for $\Delta$. The gap equation itself is
solved directly, without any additional approximations. The solution reveals
the surface enhancement of the gap $\Delta$ which was earlier found with an
approximate consideration. A strong surface-volume interplay was found also
implying a kind of the proximity effect. The diagonal matrix elements of
$\Delta$ turned out to be rather close to the empirical values for heavy atomic
nuclei.


title:
Description of the 17F(p,gamma)18Ne radiative capture reaction in the
  continuum shell model

abstract:
  The shell model embedded in the continuum is applied to calculate the
astrophysical S-factor and the reaction rate for the radiative proton capture
reaction 17F(p,gamma)18Ne. The dominant contribution to the cross-section at
very low energies is due to M1 transitions J_i^pi = 2^+ --> J_f^pi = 2_1^+
whose magnitude is controlled by a weakly bound 2_2^+ state at the excitation
energy E_x = 3.62 MeV.


title: An extra push from entrance-channel effects

abstract:
  Symmetric heavy-ion collisions are known to display an `extra-push' effect.
That is, the energy at which the s-wave transmission is 0.5 lies significantly
higher than the nominal Coulomb barrier. Despite this, however, the capture
cross section is still greatly enhanced below the uncoupled barrier. It is
shown that this phenomenon can be simply explained in terms of entrance-channel
effects which account for long-range Coulomb excitations.


title: Nuclear Symmetry Energy in Relativistic Mean Field Theory

abstract:
  The Physical origin of the nuclear symmetry energy is studied within the
relativistic mean field (RMF) theory. Based on the nuclear binding energies
calculated with and without mean isovector potential for several isobaric
chains we conform earlier Skyrme-Hartree-Fock result that the nuclear symmetry
energy strength depends on the mean level spacing $\epsilon (A)$ and an
effective mean isovector potential strength $\kappa (A)$. A detaied analysis of
isospin dependence of the two components contributing to the nuclear symmetry
energy reveals a quadratic dependence due to the mean-isoscalar potential,
$\sim\epsilon T^2$, and, completely unexpectedly, the presence of a strong
linear component $\sim\kappa T(T+1+\epsilon/\kappa)$ in the isovector
potential. The latter generates a nuclear symmetry energy in RMF theory that is
proportional to $E_{sym}\sim T(T+1)$ at variance to the non-relativistic
calculation. The origin of the linear term in RMF theory needs to be further
explored.


title:
Signature of the eta-NN configurations in coherent pi0 photoproduction
  on the deuteron

abstract:
  The photoproduction of a neutral pion on the deuteron is considered in the
energy region around the eta threshold, where a bump-like structure was
observed at very backward pion angles. Different dynamical aspects which may be
responsible for this phenomenon are analysed within a theoretical frame which
includes intermediate eta-NN configurations. The results show in particular,
that a three-body treatment of the eta-NN interaction is of special importance.


title: Signals of spinodal hadronization: strangeness trapping

abstract:
  If the deconfinement phase transformation of strongly interacting matter is
of first-order and the expanding chromodynamic matter created in a high-energy
nuclear collision enters the corresponding region of phase coexistence, a
spinodal phase separation might occur. The matter would then condense into a
number of separate blobs, each having a particular net strangeness that would
remain approximately conserved during the further evolution. We investigate the
effect that such `strangeness trapping' may have on strangeness-related
hadronic observables. The kaon multiplicity fluctuations are significantly
enhanced and thus provide a possible tool for probing the nature of the phase
transition experimentally.


title: Renormalisation-group analysis of repulsive three-body systems

abstract:
  A coordinate space approach, based on that used by Efimov, is applied to
three-body systems with contact interactions between pairs of particles. In
systems with nonzero orbital angular momentum or with asymmetric spatial wave
functions, the hyperradial equation contains a repulsive 1/r^2 potential. The
resulting wave functions are used in a renormalisation group analysis. This
confirms Griesshammer's power counting for short-range three-body forces in
these systems. The only exceptions are ones like the 4S channel for three
nucleons, where any derivatives needed in the interaction are found to be
already counted by the scaling with the cut-off.


title: Few-Nucleon Forces and Systems in Chiral Effective Field Theory

abstract:
  We outline the structure of the nuclear force in the framework of chiral
effective field theory of QCD and review recent applications to processes
involving few nucleons.


title: Role of the nuclear vector potential in deep inelastic scattering

abstract:
  We study the influence of the strong nuclear vector potential, treated using
the mean-field approximation, in deep inelastic scattering. A consistent
treatment of the electromagnetic current operator, combined with the use of the
operator product expansion is presented and discussed.


title:
Momentum-space description of three-nucleon breakup reactions including
  the Coulomb interaction

abstract:
  The Coulomb interaction between the two protons is included in the
calculation of proton-deuteron breakup and of three-body electromagnetic
disintegration of ${}^3\mathrm{He}$. The hadron dynamics is based on the purely
nucleonic charge-dependent (CD) Bonn potential and its realistic extension CD
Bonn + $\Delta$ to a coupled-channel two-baryon potential, allowing for single
virtual $\Delta$-isobar excitation. Calculations are done using integral
equations in momentum space. The screening and renormalization approach is
employed for including the Coulomb interaction. Convergence of the procedure is
found at moderate screening radii. The reliability of the method is
demonstrated. The Coulomb effect on breakup observables is seen at all energies
in particular kinematic regimes.


title:
Indirect techniques in nuclear astrophysics. Asymptotic Normalization
  Coefficient and Trojan Horse

abstract:
  Owing to the presence of the Coulomb barrier at astrophysically relevant
kinetic energies it is very difficult, or sometimes impossible, to measure
astrophysical reaction rates in the laboratory. That is why different indirect
techniques are being used along with direct measurements. Here we address two
important indirect techniques, the asymptotic normalization coefficient (ANC)
and the Trojan Horse (TH) methods. We discuss the application of the ANC
technique for calculation of the astrophysical processes in the presence of
subthreshold bound states, in particular, two different mechanisms are
discussed: direct capture to the subthreshold state and capture to the
low-lying bound states through the subthreshold state, which plays the role of
the subthreshold resonance. The ANC technique can also be used to determine the
interference sign of the resonant and nonresonant (direct) terms of the
reaction amplitude. The TH method is unique indirect technique allowing one to
measure astrophysical rearrangement reactions down to astrophysically relevant
energies. We explain why there is no Coulomb barrier in the sub-process
amplitudes extracted from the TH reaction. The expressions for the TH amplitude
for direct and resonant cases are presented.


title: The Semiclassical Coulomb Interaction

abstract:
  The semiclassical Coulomb excitation interaction is at times expressed in the
Lorentz gauge in terms of the electromagnetic fields and a contribution from
the scalar electric potential. We point out that the potential term can make
spurious contributions to excitation cross sections, especially when the the
decay of excited states is taken into account. We show that, through an
appropriate gauge transformation, the excitation interaction can be expressed
in terms of the electromagnetic fields alone.


title:
$\sigma$ meson exchange effect on nonmesonic hypernuclear weak decay
  observables

abstract:
  We analyze the influence of $\sigma$ meson exchange on the main nonmesonic
hypernuclear weak decay observables: the total rate, $\Gamma_{NM}$, the
neutron-to-proton branching ratio, $\Gamma_{n/p}$, and the proton asymmetry
parameter, $a_\Lambda$. The $\sigma$ meson exchange is added to the standard
strangeness-changing weak $\Lambda N\to NN$ transition potential, which
includes the exchange of the complete pseudoscalar and vector mesons octet
($\pi$, $\eta$, $K$, $\rho$, $\omega$, $K^*$). Using a shell model formalism,
the $\sigma$ meson weak coupling constants are adjusted to reproduce the recent
$\Gamma_{NM}$ and $\Gamma_{n/p}$ experimental data for $^5_{\Lambda}He$.
Numerical results for the remaining observables of $^5_{\Lambda}He$ and all the
observables of $^{12}_{\Lambda}C$ decays are presented. They clearly show that
the addition of the $\sigma$ meson, in spite of improving some observables
values, is not enough to reproduce simultaneously all the measurements, and the
puzzle posed by the experimental data remains unexplained.


title:
Unusual photon isospin mixing and instantaneous Coulomb effects on the
  thermodynamics of compact matter

abstract:
  A hidden local symmetry formalism with a two-photon counterterm approach is
performed based on the relativistic continuum quantum many-body theory. The
underlying electromagnetic under-screening as well as screening effects between
the electric charged point-like electrons and composite protons are discussed
by analyzing the in-medium isospin mixing of Lorentz vector with scalar due to
electromagnetic photon. Besides the usual screening results, the main
conclusion is that an effective oscillatory instantaneous Coulomb potential
between the like-charged collective electrons contributes a very large negative
term to the equation of state. This counterintuitive like-charged attraction
results from the modulation factor of the opposite charged baryon superfluid
background. The anomalous long distance quantum dragging effects between the
collective electrons can be induced in a compact Coulomb confinement
environment. The physics is of the strongly coupling characteristic in a
specific dilute regime.

categories: nucl-th astro-ph cond-mat.str-el hep-ph quant-ph


title: Particle spectra and hydro-inspired models

abstract:
  Several popular parameterizations of the freeze-out conditions in
ultra-relativistic heavy-ion collisions are shortly reviewed. The common
features of the models, responsible for the successful description of hadronic
observables, are outlined.


title:
Relativistic nuclear energy density functional constrained by low-energy
  QCD

abstract:
  A relativistic nuclear energy density functional is developed, guided by two
important features that establish connections with chiral dynamics and the
symmetry breaking pattern of low-energy QCD: a) strong scalar and vector fields
related to in-medium changes of QCD vacuum condensates; b) the long- and
intermediate-range interactions generated by one-and two-pion exchange, derived
from in-medium chiral perturbation theory, with explicit inclusion of
$\Delta(1232)$ excitations. Applications are presented for binding energies,
radii of proton and neutron distributions and other observables over a wide
range of spherical and deformed nuclei from $^{16}O$ to $^{210}Po$. Isotopic
chains of $Sn$ and $Pb$ nuclei are studied as test cases for the isospin
dependence of the underlying interactions. The results are at the same level of
quantitative comparison with data as the best phenomenological relativistic
mean-field models.


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

abstract:
  We investigate hadron production in deep inelastic lepton-nucleus scattering
in the kinematic regime of the HERMES experiment. Our calculations are carried
out in the framework of a BUU transport model which contains the Lund event
generators PYTHIA and FRITIOF for the simulation of high-energy elementary
interactions. For the first time we consistently use the complete
four-dimensional information of the Lund string break up vertices as input for
our transport theoretical studies of (pre)hadronic final state interactions. We
compare our results with experimental HERMES data on charged hadron
attenuation.


title: Can the meson cloud explain the nucleon strangeness?

abstract:
  We use the meson cloud model, including the kaon and the $K^*$ contributions,
to estimate the electric and magnetic strange form factors of the nucleon. We
compare our results with the recent measurements of the strange quark
contribution to parity-violating asymmetries in the forward G0 electron-proton
scattering experiment. We conclude that it is not possible to explain the data
using this model.


title: Dynamic nature at the QCD Critical End Point

abstract: This paper has been withdrawn by the authors due to inadequate arguments.


title: Universality in the triton charge form factor

abstract:
  We consider the three-nucleon system within an effective theory with contact
interactions at leading order in the large scattering length. We calculate the
charge form factor of the triton at low momentum transfer and extract the
triton charge radius. At this order, no two-body currents contribute and the
calculation can be performed in the impulse approximation. We also comment on
the power counting for higher orders. The requirement of a three-body force for
renormalization of the three-nucleon system explains the previously observed
correlation between the triton binding energy and charge radius for different
model potentials.


title: Heavy flavor production at RHIC and LHC energy

abstract:
  In a leading order pQCD model, we have studied the heavy flavor production in
p+p collisions at RHIC and LHC energy. Leading order pQCD models require a
K-factor. At RHIC energy, $\sqrt{s}$=200 GeV, we fix K such that the model
reproduces the integrated charm yield, $dN^{c\bar{c}}/dy$, estimated by the
STAR and the PHENIX collaboration in p+p collisions. The model then explains
the STAR data on the transverse momentum distribution of open charm mesons
$(D^0)$ and decay electrons in p+p collisions. The p+p predictions, scaled by
the number of binary collisions, also explain the electron spectra in STAR p+d
collisions and PHENIX Au+Au collisions in different centrality bins. Assuming
that at LHC energy K-factor is of the order of unity, we have used the model to
predict the transverse momentum distribution of $D$ and $B$ mesons and also of
electrons from semileptonic decay of $D\to e$ and $B\to e$, in p+p collisions
at LHC energy, $\sqrt{s}$=14 TeV.


title: Helicity amplitudes and electromagnetic decays of hyperon resonances

abstract:
  We present results for the helicity amplitudes of the lowest-lying hyperon
resonances Y*, computed within the framework of the Bonn constituent-quark
model, which is based on the Bethe-Salpeter approach. The seven parameters
entering the model were fitted to the best known baryon masses. Accordingly,
the results for the helicity amplitudes are genuine predictions. Some hyperon
resonances are seen to couple more strongly to a virtual photon with finite Q^2
than to a real photon. Other Y*'s, such as the S_{01}(1670) Lambda resonance or
the S_{11}(1620) Sigma resonance, couple very strongly to real photons. We
present a qualitative argument for predicting the behaviour of the helicity
asymmetries of baryon resonances at high Q^2.


title: A critical analysis on deeply bound kaonic states in nuclei

abstract:
  We make a critical analysis on the theoretical calculations that lead to
predictions of deeply bound kaonic states in nuclei. The model set-up, after
dropping several important processes and channels, leads unavoidably to an
unrealistic deep potential with a very small imaginary part. We review also the
experimental results taken as reference for the claim of deeply bound kaons. We
suggest that the peaks of the proton spectra come from $K^-$ absorption on a
pair of nucleons, leaving the rest of the nucleons as spectators. Based on this
conjecture we predict what would happen in other nuclei.


title:
Model independent study of the Dirac structure of the nucleon-nucleon
  interaction

abstract:
  Relativistic and non-relativistic modern nucleon-nucleon potentials are
mapped on a relativistic operator basis using projection techniques. This
allows to compare the various potentials at the level of covariant amplitudes
were a remarkable agreement is found. In nuclear matter large scalar and vector
mean fields of several hundred MeV magnitude are generated at tree level. This
is found to be a model independent feature of the nucleon-nucleon interaction.


title: Neutron Dripline in Odd and Even Mass Calcium and Nickel Nuclei

abstract:
  Neutron rich Ca and Ni nuclei have been studied in spherical Relativistic
Mean Field formalism in co-ordinate space. A delta interaction has been has
been adopted to treat the pairing correlations for the neutrons. Odd nuclei
have been treated in the blocking approximation. The effect of the positive
energy continuum and the role of pairing in the stability of nuclei have been
investigated using the resonant-BCS (rBCS) approach. In Ca isotopes, N=50 is no
longer a magic number while in Ni nuclei, a new magic number emerges at N=70.
There is a remarkable difference in the relative positions of the drip lines
for odd and even isotopes. In Ca isotopes, the last bound even and odd nuclei
are found to be $^{72}$Ca and $^{59}$Ca, respectively. In Ni isotopes, the
corresponding nuclei are $^{98}$Ni and $^{97}$Ni, respectively. The origin of
this difference in relative positions of the dripline in even and odd isotopes
in the two chain is traced to the difference in the single particle level
structures and consequent modification in the magic numbers in the two
elements. Pairing interaction is seen to play a major role. The effect of the
width of the resonance states on pairing has also been investigated.