title:
Coleman-Weinberg mechanism for spontaneous chiral symmetry breaking in
  the massless chiral sigma model

abstract:
  We study the effect of one-loop corrections from nucleon together with those
from boson in the massless chiral sigma model, where we perform the
Coleman-Weinberg renormalization procedure. This renormalization procedure has
a mechanism of spontaneous symmetry breaking due to radiative corrections in
$\phi^4$ theory. We apply it to the system of nucleon and bosons with chiral
symmetry where the negative-mass term of bosons does not exist. Spontaneous
chiral symmetry breaking is derived from the contribution of nucleon and boson
loops which generates the masses of nucleon, scalar meson, and vector meson
dynamically. We find that the renormalization scale plays an important role for
the breaking of the symmetry between fermion (nucleon) and boson, and
eventually for the chiral symmetry at the same time. In addition, we find that
the naturalness restores by means of the introduction of the vacuum fluctuation
from both nucleon and boson. Finally we obtain a stable effective potential
with the effect of Dirac sea in the chiral model for the first time.


title: Dissipative hydrodynamics in 2+1 dimension

abstract:
  In 2+1 dimension, we have simulated the hydrodynamic evolution of QGP fluid
with dissipation due to shear viscosity. Comparison of evolution of ideal and
viscous fluid, both initialised under the same conditions e.g. same
equilibration time, energy density and velocity profile, reveal that the
dissipative fluid evolves slowly, cooling at a slower rate. Cooling get still
slower for higher viscosity. The fluid velocities on the otherhand evolve
faster in a dissipative fluid than in an ideal fluid. The transverse expansion
is also enhanced in dissipative evolution. For the same decoupling temperature,
freeze-out surface for a dissipative fluid is more extended than an ideal
fluid. Dissipation produces entropy as a result of which particle production is
increased. Particle production is increased due to (i) extension of the
freeze-out surface and (ii) change of the equilibrium distribution function to
a non-equilibrium one, the last effect being prominent at large transverse
momentum. Compared to ideal fluid, transverse momentum distribution of pion
production is considerably enhanced. Enhancement is more at high $p_T$ than at
low $p_T$. Pion production also increases with viscosity, larger the viscosity,
more is the pion production. Dissipation also modifies the elliptic flow.
Elliptic flow is reduced in viscous dynamics. Also, contrary to ideal dynamics
where elliptic flow continues to increase with transverse momentum, in viscous
dynamics, elliptic flow tends to saturate at large transverse momentum. The
analysis suggest that initial conditions of the hot, dense matter produced in
Au+Au collisions at RHIC, as extracted from ideal fluid analysis can be changed
significantly if the QGP fluid is viscous.


title: Gamow-Teller sum rule in relativistic nuclear models

abstract:
  Relativistic corrections are investigated to the Gamow-Teller(GT) sum rule
with respect to the difference between the $\beta_-$ and $\beta_+$ transition
strengths in nuclei. Since the sum rule requires the complete set of the
nuclear states, the relativistic corrections come from the anti-nucleon degrees
of freedom. In the relativistic mean field approximation, the total GT
strengths carried by the nucleon sector is quenched by about 12% in nuclear
matter, while by about 8% in finite nuclei, compared to the sum rule value. The
coupling between the particle-hole states with the nucleon-antinucleon states
is also discussed with the relativistic random phase approximation, where the
divergence of the response function is renormalized with use of the counter
terms in the Lagrangian. It is shown that the approximation to neglect the
divergence, like the no-sea approximation extensively used so far, is
unphysical, from the sum-rule point of view.


title:
Inclusive Photoproduction of $\eta$ Mesons on Nuclei and the in-medium
  properties of the S$_{11}$ Resonance

abstract:
  A relativistic non-local model for the inclusive photoproduction of $\eta$
mesons from complex nuclei is introduced. The model is based on the dominance
of the S$_{11}$(1535) resonance. We compare the results of our calculations
with the available data on inclusive cross sections for the nuclei C, Al and
Cu. Assuming the resonance propagates freely in the nuclear medium, we find
that the calculated angular distribution and energy dependence of the cross
sections reproduce the data in a reasonable fashion. The present non-local
model allows the inclusion of density dependent mass and width in the
calculations. Including these in the calculations reveals that the presently
available data do not show clear preference for the inclusion of such
modifications of the properties of the S$_{11}$(1535) in the nuclear medium.


title: Two-pion production in deuteron-deuteron collisions at low energies

abstract:
  The cross section for the dd -> 4He pi pi reaction is estimated near
threshold in a two-step model where a pion created in a first interaction
produces a second pion in a subsequent interaction. This approach, which
describes well the rates of 2pi and eta production in the pd -> 3He pi pi and
dd -> 4He eta reactions, leads to predictions that are much too low compared to
experiment. Alternatives to this and the double-Delta model will have to be
sought to explain these data.


title: Medium polarization isotopic effects on nuclear binding energies

abstract:
  There exist several effective interactions whose parameters are fitted to
force mean field predictions to reproduce experimental findings of finite
nuclei and calculated properties of infinite nuclear matter. Exploiting this
tecnique one can give a good description of nuclear binding energies. We
present evidence that further progress can be made by taking into account
medium polarization effects associated with surface and pairing vibrations.


title:
Effects of spin-orbit interaction on nuclear response and neutrino mean
  free path

abstract:
  The effects of the spin-orbit component of the particle-hole interaction on
nuclear response functions and neutrino mean free path are examined. A complete
treatment of the full Skyrme interaction in the case of symmetric nuclear
matter and pure neutron matter is given. Numerical results for neutron matter
are discussed. It is shown that the effects of the spin-orbit interaction
remain small, even at momentum transfer larger than the Fermi momentum. The
neutrino mean free paths are marginally affected.


title:
General study of superscaling in quasielastic $(e,e')$ and $(\nu,\mu)$
  reactions using the relativistic impulse approximation

abstract:
  The phenomenon of superscaling for quasielastic lepton induced reactions at
energies of a few GeV is investigated within the framework of the relativistic
impulse approximation. A global analysis of quasielastic inclusive electron and
charged-current neutrino scattering reactions on nuclei is presented. Scaling
and superscaling properties are shown to emerge from both types of processes.
The crucial role played by final state interactions is evaluated by using
different approaches. The asymmetric shape presented by the experimental
scaling function, with a long tail in the region of positive values of the
scaling variable, is reproduced when the interaction in the final state between
the knockout nucleon and the residual nucleus is described within the
relativistic mean field approach. The impact of gauge ambiguities and off-shell
effects in the scaling function is also analyzed.


title: Title Quantum Optics and Heavy Ion Physics

abstract:
  I shall try to say a few words about two particular ways in which my own work
has a certain relation to your work with heavy ions. My title is therefore
"Quantum Optics and Heavy Ion Physics".


title: Pionic Color Transparency

abstract:
  We use a semi-classical approximation to investigate the effects of color
transparency on pion electroproduction reactions. The resulting reduced nuclear
interactions produce significant, but not dominating, differences with the
results of conventional distorted-wave, Glauber-type treatments at kinematics
accessible to Jefferson Laboratory. Nuclear effects that could mimic the
influence of color transparency are also discussed.


title:
The Lipkin Model in Many-Fermion System as an Example of the su(1,1)
  times su(1,1)-Algebraic Model

abstract:
  Following the idea, recently, proposed by the present authors for the
two-level pairing model, the Lipkin model is reexamined. It is a natural
generalization of the method already developed by the present authors with
Kuriyama. This model is a schematic model for many-fermion system and obeys the
su(2)-algebra. It is shown that the use of the Schwinger boson representation,
the model is expressed in terms of the su(1,1) times su(1,1)-algebra and with
the aid of the MYT mapping method, it is disguised from the orginal form in
terms of the Holstein-Primakoff representation. Further, under various coherent
states, the classical counterparts are derived. It is concluded that the Lipkin
model can be treated in the common ring as that of the two-level pairing model.


title: beta-decay in neutron-deficient Hg, Pb, and Po isotopes

abstract:
  The effect of nuclear deformation on the energy distributions of the
Gamow-Teller strength is studied in neutron-deficient Hg, Pb, and Po even
isotopes. The theoretical framework is based on a self-consistent deformed
Skyrme Hartree-Fock mean field with pairing correlations between like nucleons
in BCS approximation and residual spin-isospin interactions treated in the
proton-neutron quasiparticle random phase approximation. After a systematic
study of the Gamow-Teller strength distributions in the low excitation energy
region, relevant for beta-decay, we have identified the best candidates to look
for deformation signatures in their beta-decay patterns. beta+ half-lives and
total Gamow-Teller strengths B(GT+) and B(GT-) are analyzed as well.


title: Phase diagram and thermodynamics of the PNJL model

abstract:
  QCD-based thermodynamics at zero and finite quark chemical potential is
studied using an extended Nambu and Jona-Lasinio approach in which quarks
couple simultaneously to the chiral condensate and to a background temporal
gauge field representing Polyakov loop dynamics. This so-called PNJL model thus
includes features of both deconfinement and chiral symmetry restoration. We
discuss the phase diagram as it emerges from this approach in close comparison
with results from lattice QCD thermodynamics. The critical point, separating
crossover from first order phase transition, is investigated with special focus
on its quark mass dependence, starting from the relatively large masses
presently accessible by lattice simulations, down to the chiral limit.


title:
Properties of Nuclear and Neutron Matter and Thermodynamic Consistency
  in a Nonlinear Mean-field Approximation

abstract:
  Properties of nuclear and neutron matter are discussed in a nonlinear
$\sigma$-$\omega$-$\rho$ mean-field approximation with self-interactions and
mixing-interactions of mesons and baryons. The nonlinear interactions are
renormalized by employing the theory of conserving approximations, which
results in a thermodynamically consistent approximation that maintains
Hugenholtz-Van Hove theorem and Landau's requirement of quasiparticles. The
approximation is equivalent to the Hartree approximation with {\it effective
masses} and {\it effective coupling constants} of baryons and mesons. The
effective masses and coupling constants are naturally required by
self-consistency of the theory of conserving approximations. The approximation
is applied to nuclear and neutron matter, which suggests that the lower bound
of nuclear compressibility $K \sim 180$ MeV (with the symmetry energy $a_4 =
35.0$ MeV) be required to be consistent with properties of nuclear matter and
the maximum masses of observed hadronic neutron stars ($M_{max} \ge 2.00$
$M_{\odot}$). The values of the compressibility, symmetry energy together with
effective masses and coupling constants of baryons and mesons will be important
constraints to examine models of nuclear and neutron matter. The accumulating
data and accurate measurements of observables in high density and energy region
will supply significant information in order to testify theoretical consistency
of nuclear models.


title:
New features in the stability and fission decay of superheavy Thorium
  isotopes

abstract:
  Superheavy isotopes are highly neutron rich nuclei in the vicinity of neutron
drip-line, stabilized by shell effect against the instability due to repulsive
component of nuclear force, analogous to superheavy elements similarly
stabilized against Coulomb instability. Here we discuss the stability and
fission decay properties of such nuclei in the $^{254}$Th region and show that
they are stable against $\alpha$ and fission decay and have $\beta$-decay life
time of several tens of seconds. In particular, the $^{254}$Th nucleus has a
low fission barrier and unusally large barrier width. This makes it an ideal
thermally fissile nucleus, if formed by means of a thermal neutron, like other
known nuclei such as $^{233}$U, $^{235}$U, $^{239}$Pu in this actinide region.
It shows a new mode of fast fission decay, which may be termed as
multifragmentation fission, in which in addition to two heavy fragments large
number of scission neutrons are simultaneously produced. Its likely synthesis
during the r-process nucleosynthesis will have important bearing on steller
evolution, and here in the laboratory, it has great potential in energy
production.


title: Two-body correlation functions in nuclear matter with $np$ condensate

abstract:
  The density, spin and isospin correlation functions in nuclear matter with a
neutron-proton ($np$) condensate are calculated to study the possible
signatures of the BEC-BCS crossover in the low-density region. It is shown that
the criterion of the crossover (Phys. Rev. Lett. {\bf 95}, 090402 (2005)),
consisting in the change of the sign of the density correlation function at low
momentum transfer, fails to describe correctly the density-driven BEC-BCS
transition at finite isospin asymmetry or finite temperature. As an unambiguous
signature of the BEC-BCS transition, there can be used the presence (BCS
regime) or absence (BEC regime) of the singularity in the momentum distribution
of the quasiparticle density of states.


title: A Perspective on Hadron Physics

abstract:
  The phenomena of confinement and dynamical chiral symmetry breaking are basic
to understanding hadron observables. They can be explored using Dyson-Schwinger
equations. The existence of a systematic, nonperturbative and symmetry
preserving truncation of these equations enables the proof of exact results in
QCD, and their illustration using simple but accurate models. We provide a
sketch of the material qualitative and quantitative success that has been
achieved in the study of pseudoscalar and vector mesons. Efforts are now
turning to the study of baryons, which we exemplify via a calculation of
nucleon weak and pionic form factors.


title: Diagrammatic calculation of thermodynamical quantities in nuclear matter

abstract:
  In medium T-matrix calculations for symmetric nuclear matter at zero and
finite temperatures are presented. The internal energy is calculated from the
Galitskii-Koltun's sum rule and from the summation of the diagrams for the
interaction energy. The pressure at finite temperature is obtained from the
generating functional form of the thermodynamic potential. The entropy at high
temperature is estimated and compared to expressions corresponding to a
quasiparticle gas.


title: Low-Energy Thermal Photons from Meson-Meson Bremsstrahlung

abstract:
  Within an effective hadronic model including electromagnetic interactions via
a U$_{\rm em}$(1) gauge, we reinvestigate photon Bremsstrahlung from a hot
hadronic gas as expected to be formed in relativistic heavy-ion collisions at
SPS energies. We calculate photon emission from the reactions
$\pi\pi\to\pi\pi\gamma$ and $\pi K \to\pi K\gamma$ by an explicit (numerical)
evaluation of the multi-dimensional phase space integral. This, in particular,
allows to avoid the commonly employed soft photon approximation (SPA), as well
as to incorporate final-state thermal enhancement factors. % during the
hadronic stage of the fireball. Both improvements are shown to result in an
appreciable increase of the photon production rate over previous hadronic
calculations. Upon convolution over a thermal fireball we find an improvement
in the description of recent low transverse-momentum WA98 data at SPS. The
influence of both Landau-Pomeranchuk-Migdal and in-medium effects on "$\sigma$"
and $\rho$-meson exchanges are briefly discussed.


title:
On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic
  Nuclear Collisions

abstract:
  Substantial collective flow is observed in collisions between large nuclei at
RHIC (Relativistic Heavy Ion Collider) as evidenced by single-particle
transverse momentum distributions and by azimuthal correlations among the
produced particles. The data are well-reproduced by perfect fluid dynamics. A
calculation of the dimensionless ratio of shear viscosity $\eta$ to entropy
density $s$ by Kovtun, Son and Starinets within anti-de Sitter space/conformal
field theory yields $\eta/s = \hbar/4\pi k_B$ which has been conjectured to be
a lower bound for any physical system. Motivated by these results, we show that
the transition from hadrons to quarks and gluons has behavior similar to
helium, nitrogen, and water at and near their phase transitions in the ratio
$\eta/s$. We suggest that experimental measurements can pinpoint the location
of this transition or rapid crossover in QCD.


title: Relativistic effects in exclusive neutron-deuteron breakup

abstract:
  We extended the study of relativistic effects in neutron-deuteron scattering
to the exclusive breakup. To this aim we solved the three-nucleon Faddeev
equation including such relativistic features as relativistic kinematics and
boost effects at incoming neutron lab. energies E_n^{lab}=65 MeV, 156 MeV and
200 MeV. As dynamical input a relativistic nucleon-nucleon interaction exactly
on-shell equivalent to the CD Bonn potential has been used. We found that the
magnitude of relativistic effects increases with the incoming neutron energy
and, depending on the phase-space region, relativity can increase as well as
decrease the nonrelativistic breakup cross section. In some regions of the
breakup phase-space dynamical boost effects are important. For a number of
measured exclusive cross sections relativity seems to improve the description
of data.


title:
New calculation schemes for proton-deuteron scattering including the
  Coulomb interaction

abstract:
  The Coulomb interaction between the protons is included in the description of
proton-deuteron scattering using the screening and renormalization approach in
the framework of momentum-space integral equations. Two new calculational
schemes are presented that confirm the reliability of the perturbative approach
for treating the screened Coulomb interaction in high partial waves, used by us
in earlier works.


title:
Chiral O(Q^4) two-body operators for s-wave pion photoproduction on the
  NN system

abstract:
  The two-body currents for s-wave pion photoproduction on the NN system are
derived to O(Q^4) in chiral perturbation theory. For the interesting case of
3S1 <-> 1S0 transitions, we show that an axial isovector two-nucleon contact
term connects the short-distance physics of pion photoproduction to pion
production and several important electroweak reactions. We also find that the
standard chiral Lagrangian gives a gamma pi pi N N vertex that have not been
explicitly mentioned in previous literature. The corresponding Feynman rule is
presented here and some processes where it should be important are briefly
discussed.


title: Effect of deformation on two-neutrino double beta decay matrix elements

abstract:
  We study the effect of deformation on the two-neutrino double beta decay for
ground state to ground state transitions in all the nuclei whose half-lives
have been measured. Our theoretical framework is a deformed QRPA based in
Woods-Saxon or Hartree-Fock mean fields. We are able to reproduce at the same
time the main characteristics of the two single beta branches, as well as the
double beta matrix elements. We find a suppression of the double beta matrix
element with respect to the spherical case when the parent and daughter nuclei
have different deformations.


title: New developments in nuclear supersymmetry

abstract:
  In this contribution, I discuss the role of symmetries and algebraic methods
in nuclear structure physics. In particular, I review some recent developments
in nuclear supersymmetry and indicate possible applications for light nuclei in
the sd- and pf-shell.


title: Gluon Saturation Effects in Relativistic U+U Collisions

abstract:
  We examine entropy production in relativistic U+U collisions on the basis of
a Color Glass Condensate (CGC) type picture as implemented in the
Kharzeev-Levin-Nardi model (KLN). In this framework, we find that the peak
entropy density produced in tip-on-tip U+U collisions is about 30% greater than
that seen in central Au+Au collisions. Although the resulting difference in the
produced charged particle multiplicity between tip-on-tip and side-on-side
collisions is smaller than that predicted by previous Glauber model estimates,
it is still large enough to allow for experimental discrimination between
average orientations of the uranium nuclei. We also point out that in the
saturation/CGC approach the collision geometry plays a more important role than
previously believed, and that the observed centrality dependence of the
produced particle multiplicity per participant in Au+Au collisions can be
qualitatively reproduced even without running coupling effects.


title: Electrically charged compact stars

abstract:
  We review here the classical argument used to justify the electrical
neutrality of stars and show that if the pressure and density of the matter and
gravitational field inside the star are large, then a charge and a strong
electric field can be present. For a neutron star with high pressure (~ 10^{33}
to 10^{35} dynes /cm^2) and strong gravitational field (~ 10^{14} cm/s^2),
these conditions are satisfied. The hydrostatic equation which arises from
general relativity, is modified considerably to meet the requirements of the
inclusion of the charge. In order to see any appreciable effect on the
phenomenology of the neutron stars, the charge and the electrical fields have
to be huge (~ 10^{21} Volts/cm). These stars are not however stable from the
viewpoint that each charged particle is unbound to the uncharged particles, and
thus the system collapses one step further to a charged black hole


title: Interference effect in elastic parton energy loss in a finite medium

abstract:
  Similar to the radiative parton energy loss due to gluon bremsstrahlung,
elastic energy loss of a parton undergoing multiple scattering in a finite
medium is demonstrated to be sensitive to interference effect. The interference
between amplitudes of elastic scattering via a gluon exchange and that of gluon
radiation reduces the effective elastic energy loss in a finite medium and
gives rise to a non-trivial length dependence. The reduction is most
significant for a propagation length $L< 4/\pi T$ in a medium with a
temperature $T$. Though the finite size effect is not significant for the
average parton propagation in the most central heavy-ion collisions, it will
affect the centrality dependence of its effect on jet quenching.


title: Formation time scaling and hadronization in cold nuclear matter

abstract:
  I propose a scaling analysis of the hadron multiplicity ratio measured in
Deep Inelastic Scattering on nuclear targets as a tool to distinguish energy
loss and nuclear absorption effects on hadron suppression in cold nuclear
matter. The proposed scaling variable is a function of the hadron fractional
energy and of the virtual photon energy. Its functional form, which depends on
a parameter \lambda, can be fixed by general theoretical considerations and
encompasses both energy loss and absorption models. The parameter \lambda is
fitted to HERMES experimental data and shown to favor prehadron nuclear
absorption as leading mechanism for hadron suppression as opposed to quark
energy loss.


title:
Arbitrary l-state solutions of the rotating Morse potential by the
  asymptotic iteration method

abstract:
  For non-zero $\ell$ values, we present an analytical solution of the radial
Schr\"{o}dinger equation for the rotating Morse potential using the Pekeris
approximation within the framework of the Asymptotic Iteration Method. The
bound state energy eigenvalues and corresponding wave functions are obtained
for a number of diatomic molecules and the results are compared with the
findings of the super-symmetry, the hypervirial perturbation, the
Nikiforov-Uvarov, the variational, the shifted 1/N and the modified shifted 1/N
expansion methods.


title: Tensor interactions in mean-field approaches

abstract:
  Basic properties of the nuclear tensor mean fields are reviewed, and their
role in changing the shell structure and masses of nuclei is analyzed within
the spherical Hartree-Fock-Bogolyubov approach.


title: Probing nuclear skins and halos with elastic electron scattering

abstract:
  I investigate the elastic electron scattering off nuclei far from the
stability line. The effects of the neutron and proton skins and halos on the
differential cross sections are explored. Examples are given for the charge
distribution in Sn isotopes and its relation to the neutron skin. The neutron
halo in $^{11}$Li and the proton halo in $^{8}$B are also investigated.
Particular interest is paid to the inverse scattering problem and its
dependence on the experimental precision. These studies are of particular
interest for the upcoming electron ion colliders at the GSI and RIKEN
facilities.


title:
Exploring the extended density-dependent Skyrme effective forces for
  normal and isospin-rich nuclei to neutron stars

abstract:
  We parameterize the recently proposed generalized Skyrme effective force
(GSEF) containing extended density dependence. The parameters of the GSEF are
determined by the fit to several properties of the normal and isospin-rich
nuclei. We also include in our fit a realistic equation of state for the pure
neutron matter up to high densities so that the resulting Skyrme parameters can
be suitably used to model the neutron star with the "canonical" mass ($\sim 1.4
M_\odot$). For the appropriate comparison we generate a parameter set for the
standard Skyrme effective force (SSEF) using exactly the same set of the data
as employed to determine the parameters of the GSEF. We find that the GSEF
yields larger values for the neutron skin thickness which are closer to the
recent predictions based on the isospin diffusion data. The Skyrme parameters
so obtained are employed to compute the strength function for the isoscalar
giant monopole, dipole and quadrupole resonances. It is found that in the case
of GSEF, due to the the larger value of the nucleon effective mass the values
of centroid energies for the isoscalar giant resonances are in better agreement
with the corresponding experimental data in comparison to those obtained using
the SSEF. We also present results for some of the key properties associated
with the neutron star of "canonical" mass and for the one with the maximum
mass.


title: Reconstructing supernova-neutrino spectra using low-energy beta-beams

abstract:
  Only weakly interacting, neutrinos are the principal messengers reaching us
from the center of a supernova. Terrestrial neutrino telescopes, such as SNO
and SuperKamiokande, can provide precious information about the processes in
the core of a collapsing and exploding star. But the information about the
supernova that a neutrino detector can supply, is restricted by the fact that
little experimental data on the neutrino-nucleus cross sections exists and by
the uncertainties in theoretical calculations. In this letter, we propose a
novel procedure that determines the response of a target nucleus in a
supernova-neutrino detector directly, by using low-energy beta-beams. We show
that fitting 'synthetic' spectra, constructed by taking linear combinations of
beta-beam spectra, to the original supernova-neutrino spectra reproduces the
folded differential cross sections very accurately. Comparing the response in a
terrestrial detector to these synthetic responses provides a direct way to
determine the main parameters of the supernova-neutrino energy-distribution.


title: Tetrahedral correlations in $^{80}$Zr and $^{98}$Zr

abstract:
  Axial octupole and tetrahedral correlations in $^{80}$Zr and $^{98}$Zr have
been investigated using the generator coordinate method, applied to a basis
generated by Skyrme HF+BCS calculations. We focus on the possible presence of
states with tetrahedral symmetry and their stability with respect to octupole
vibrations. We show that pairing significantly reduces the stability of the
tetrahedral configuration and that a shallow mean-field tetrahedral minimum
coexists with an axial octupole minimum. The contributions to the correlation
energies coming from the tetrahedral degree of freedom and octupole axial
deformation are discussed.


title: Deformation parameter for diffuse density

abstract:
  In extracting deformation parameters from multipole moments for deformed
nuclei, one commonly uses the formulas which are based on a sharp-cut density
distribution. We discuss a possible ambiguity for this procedure and clarify
the role of diffuseness parameter of the density distribution. For this
purpose, we use a deformed Woods-Saxon density as well as a density
distribution obtained from the self-consistent relativistic mean-field (RMF)
model. We show that the formula using a root-mean-square radius instead of a
sharp-cut radius requires a large correction due to a finite surface
diffuseness parameter even for stable nuclei. An implication to neutron-rich
nuclei is also discussed.


title:
Enhanced formation of a dense Kbar nuclear cluster K^- pp in pp
  collisions - Lambda*-p doorway dominance

abstract:
  We have found theoretically that the elementary process, p + p to K+ +
Lambda(1405) + p, which occurs in a short impact parameter (around 0.2 fm) and
with a large momentum transfer (Q ~ 1.6 GeV/c), leads to unusually large
self-trapping of Lambda(1405) by the projectile proton, when a Lambda* -p
system exists as a dense bound state (size ~ 1.0 fm) propagating to K^-pp. The
seed, called "Lambda*-p doorway", is expected to play an important role in the
(p, K*) type reactions and heavy-ion collisions to produce various Kbar nuclear
clusters.


title:
The role of the continuum and the spurious 1- transitions in incoherent
  mu - e conversion rate calculations

abstract:
  By using the Continuum RPA (CRPA) method, the incoherent transition strength
of the exotic mu - e conversion in the 208Pb and 40Ca nuclei is investigated.
The question whether excited nuclear states lying high in the continuum give an
important contribution to the incoherent rate is addressed. The admixture of
spurious components in the rate coming from 1- excitations is investigated in
detail by using the self-consistent CRPA with Skyrme interactions as well as a
less consistent version and by employing two ways to remove the spurious
strength: the use of effective operators or simply the exclusion of the
spurious state appearing close to zero energy. In all cases, the correction
achieved is quite large.


title:
Properties of effective interactions and the excitation of 6- states in
  28Si

abstract:
  Cross-section and analyzing power data from (p,p') scattering to the 6-
states at 11.58 and 14.35 MeV in 28Si, taken with energies of 80, 100, 134, and
180 MeV protons, have been analyzed using a distorted wave approximation with
microscopically defined wave functions. The results, taken in conjunction with
an analysis of an M6 electron scattering form factor, suggest that the two
states exhaust respectively, ~50% and ~60% of the strengths of isoscalar and
isovector particle-hole excitations from the ground state. The energy variation
of data also suggests that the non-central components of the effective
interactions at 80 and 100 MeV may need to be enhanced.


title: The possible existence of Hs in nature from a geochemical point of view

abstract:
  A hypothesis of the existence of a long-lived isotope 271Hs in natural
molybdenites and osmirides is considered from a geochemical point of view. It
is shown that the presence of Hs in these minerals can be explained only by
making an additional ad hoc assumption on the existence of an isobaric pair of
271Bh-271Hs. This assumption could be tested by mass-spectrometric measurements
of U, Pb, Kr, Xe, and Zr isotopic shifts.


title: Universality in a 2-component Fermi System at Finite Temperature

abstract:
  Thermodynamic properties of a fermionic system close to the unitarity limit,
where the 2-body scattering length |a| approaches infinity is studied at high
temperature Boltzmann regime. For dilute systems the virial expansion
coefficients in the Boltzmann regime are expected, from general arguments, to
be universal. A model independent finite temperature T calculation of the third
virial coefficient b3(T) is presented. At the unitarity limit, b3(T) = -0.48 is
an universal number. The energy density up to the third virial expansion is
derived. These results are relevant for dilute neutron matter and could be
tested in current atomic experiments on dilute fermionic gases near the
Feshbach resonance.


title: Near-Fields and Initial Energy Density in High Energy Nuclear Collisions

abstract:
  We calculate the classical gluon field created at early times in collisions
of large nuclei at high energies. We find that the field is dominated by the
longitudinal chromoelectric and chromomagnetic components. We estimate the
initial energy density of this gluon field to be approximately 260 GeV/fm$^3$
at RHIC.


title: Origins of Viscosity in Relativistic Heavy Ion Collisons

abstract:
  Withdrawn by author. This paper was mistakenly submitted twice (See
nucl-th/0604008)


title:
Multinucleon Mechanisms in Inclusive Subthreshold K+ Production in p+C12
  Collisions at 1 GeV

abstract:
  We analyze recent inclusive data on K+ production in proton induced
Lambda-multi nucleon knock out on Carbon 12. We describe collective effects
among the incoming p and bound nucleons in a pi, rho rescattering model via the
excitation of various baryon resonances. We find the dominance of Lambda N and
Lambda NN final states for K+ momenta below 200 MeV/c, while for momenta above
400 MeV/c the data reflect a continuum with an unbound Lambda together with the
bound residual nucleus C 12.


title: Investigation of subthreshold resonances with the Trojan horse method

abstract:
  It is pointed out that the Trojan horse method is a suitable tool to
investigate subthreshold resonances.


title:
Ferromagnetic instabilities in neutron matter at finite temperature with
  the Gogny interaction

abstract:
  The properties of spin polarized neutron matter are studied both at zero and
finite temperature using the D1 and the D1P parameterizations of the Gogny
interaction. The results show two different behaviors: whereas the D1P force
exhibits a ferromagnetic transition at a density of $\rho_c \sim 1.31$
fm$^{-3}$ whose onset increases with temperature, no sign of such a transition
is found for D1 at any density and temperature, in agreement with recent
microscopic calculations.


title:
Energy Dependence of the Lambda-Sigma0 Production in Proton-Proton
  Collisions

abstract:
  The energy dependence of the reactions pp -> p Lambda K+ and pp -> p Sigma0
K+ and the ratio R(Lambda/Sigma0} is studied in a constituent quark-gluon
model, including the excitation of the baryon resonances N*(1650), N*(1710) and
N*(1720) near the Lambda/Sigma0 thresholds. Representing the baryons as
quark-diquark objects, the energy dependent ratio Lambda/Sigma0, which is
qualitatively reproduced up to excess energies of 60 MeV above threshold,
provides detailed information on the momentum spectrum of axial diquarks in the
proton and the Sigma0.


title: Relativistic Covariance and Quark-Diquark Wave Functions

abstract:
  We derive covariant wave functions for hadrons composed of two constituents
for arbitrary Lorentz boosts. Focussing explicitly on baryons as quark-diquark
systems, we reduce their manifestly covariant Bethe-Salpeter equation to
covariant 3-dimensional forms by projecting on the relative quark-diquark
energy. Guided by a phenomenological multi gluon exchange representation of
covariant confining kernels, we derive explicit solutions for harmonic
confinement and for the MIT Bag Model. We briefly sketch implications of
breaking the spherical symmetry of the ground state and the transition from the
instant form to the light cone via the infinite momentum frame.


title:
Quark Model Estimates of the Structure of the Meson-N-N*(1535,1/2-)
  Transition Vertices

abstract:
  We address an actual problem of baryon-resonance dominated meson-exchange
processes in the low GeV regime, i.e. the phase and the structure of meson-NN*
transition vertices. Our starting point is a quark-diquark model for the
baryons (obeying approximate covariance; the mesons are kept as elementary
objects), together with the relative phases for the NN vertices, as determined
from low energy NN scattering. From the explicit representation of the N and N*
baryons, we exemplify the derivation of the coupling constants and form factors
of the NN*(1535,1/2-)transition vertices for pseudo-scalar, scalar and vector
mesons.


title: From Dimensional to Cut-Off Regularization

abstract:
  We extent the standard approach of dimensional regularization of Feynman
diagrams: we replace the transition to lower dimensions by a 'natural' cut-off
regulator. Introducing an external regulator of mass Lambda^(2e), we regain in
the limit e -> 0 and e > 0 the results of dimensional and cut-off
regularization, respectively. We demonstrate the versatility and adequacy of
the different regularization schemes for practical examples (such as non
covariant regularization, the axial anomaly or regularization in effective
field theories).


title: Quenching of the Deuteron in Flight

abstract:
  We investigate the Lorentz contraction of a deuteron in flight. Our starting
point is the Blankenbecler-Sugar projection of the Bethe-Salpeter equation to a
3-dimensional quasi potential equation, wqhich we apply for the deuteron bound
in an harmonic oscillator potential (for an analytical result) and by the Bonn
NN potential for a more realistic estimate. We find substantial quenching with
increasing external momenta and a significant modification of the high momentum
spectrum of the deuteron.


title:
OZI violation in low energy omega and phi production in the pp system in
  a quark-gluon model

abstract:
  We investigate OZI violation in near-threshold omega and phi production in
the pp system. Assuming ideal omega/phi mixing (corrections are estimated), the
energy dependence of the ratio R(omega/phi) is analyzed in a perturbative
quark-gluon exchange model up to the third other in the strong coupling
constant alpha(s) with the proton represented as a quark - scalar diquark
system. We give a very natural explanation of the violation of the OZI rule in
omega/phi production and its energy dependence near the production thresholds.


title:
Production and Width of the Pentaquark Theta+(1540) in Strangeness
  Production in the Proton-Proton System

abstract:
  We analyze recent experimental information on the excitation of the
Theta+(1540) pentaquark in the hadronic reaction pp -> p Sigma+ K0. Upon
describing the conventional production process - which serves as a
normalization - in a meson exchange model, we estimate the resonant Theta+
induced cross section and the width of the pentaquark via K - exchange in a
meson-baryon and a quark-gluon model. From a comparison with experiment we
extract information on the width of the Theta+, the p Theta+ K0 coupling
constant in the meson exchange and the relative s or p wave function for a
nucleon-kaon cluster in the Theta+.


title:
Polarization effects in $e^+ +e^-\to \bar d+d$ and determination of time
  like deuteron form factors

abstract:
  Polarization effects in the reaction $e^++e^-\to \bar d+d$ have been
investigated for the case of longitudinally polarized electron beam and
arbitrary polarization of the produced deuteron, with the aim of a
determination of the time-like complex deuteron electromagnetic form factors.
General expressions of polarization observables are derived and numerical
estimations have been carried out by means of various models of deuteron
electromagnetic form factors, for kinematical conditions near threshold.


title: $\bar K$-Nuclear Deeply Bound States?

abstract:
  Following the prediction by Akaishi and Yamazaki of relatively narrow $\bar
K$-nuclear states, deeply bound by over 100 MeV where the main decay channel
$\bar K N \to \pi \Sigma$ is closed, several experimental signals in stopped
$K^-$ reactions on light nuclei have been interpreted recently as due to such
states. In this talk I review (i) the evidence from $K^-$-atom data for a {\it
deep} $\bar K$-nucleus potential, as attractive as $V_{\bar K}(\rho_0) \sim
-(150 - 200)$ MeV at nuclear matter density, that could support such states;
and (ii) the theoretical arguments for a {\it shallow} potential, $V_{\bar
K}(\rho_0) \sim -(40 - 60)$ MeV. I then review a recent work by Mare\v{s},
Friedman and Gal in which $\bar K$-nuclear bound states are generated
dynamically across the periodic table, using a RMF Lagrangian that couples the
$\bar K$ to the scalar and vector meson fields mediating the nuclear
interactions. Substantial polarization of the core nucleus is found for light
nuclei, with central nuclear densities enhanced by almost a factor of two. The
binding energies and widths calculated in this dynamical model differ
appreciably from those calculated for a static nucleus. These calculations
provide a lower limit of $\Gamma_{\bar K} \sim 50 \pm 10$ MeV on the width of
nuclear bound states for $\bar K$ binding energy in the range $B_{\bar K} = 100
- 200$ MeV.


title:
Relating pseudospin and spin symmetries through charge conjugation and
  chiral transformations: the case of the relativistic harmonic oscillator

abstract:
  We solve the generalized relativistic harmonic oscillator in 1+1 dimensions,
i.e., including a linear pseudoscalar potential and quadratic scalar and vector
potentials which have equal or opposite signs. We consider positive and
negative quadratic potentials and discuss in detail their bound-state solutions
for fermions and antifermions. The main features of these bound states are the
same as the ones of the generalized three-dimensional relativistic harmonic
oscillator bound states. The solutions found for zero pseudoscalar potential
are related to the spin and pseudospin symmetry of the Dirac equation in 3+1
dimensions. We show how the charge conjugation and $\gamma^5$ chiral
transformations relate the several spectra obtained and find that for massless
particles the spin and pseudospin symmetry related problems have the same
spectrum, but different spinor solutions. Finally, we establish a relation of
the solutions found with single-particle states of nuclei described by
relativistic mean-field theories with scalar, vector and isoscalar tensor
interactions and discuss the conditions in which one may have both nucleon and
antinucleon bound states.


title: Statistical Properties of Nuclei by the Shell Model Monte Carlo Method

abstract:
  We use quantum Monte Carlo methods in the framework of the interacting
nuclear shell model to calculate the statistical properties of nuclei at finite
temperature and/or excitation energies. With this approach we can carry out
realistic calculations in much larger configuration spaces than are possible by
conventional methods. A major application of the methods has been the
microscopic calculation of nuclear partition functions and level densities,
taking into account both correlations and shell effects. Our results for nuclei
in the mass region A ~ 50 - 70 are in remarkably good agreement with
experimental level densities without any adjustable parameters and are an
improvement over empirical formulas. We have recently extended the shell model
theory of level statistics to higher temperatures, including continuum effects.
We have also constructed simple statistical models to explain the dependence of
the microscopically calculated level densities on good quantum numbers such as
parity. Thermal signatures of pairing correlations are identified through
odd-even effects in the heat capacity.


title: Spin-Excitation Mechanisms in Skyrme-Force Time-Dependent Hartree-Fock

abstract:
  We investigate the role of odd-odd (with respect to time inversion) couplings
in the Skyrme force on collisions of light nuclei, employing a fully
three-dimensional numerical treatment without any symmetry restrictions and
with modern Skyrme functionals. We demonstrate the necessity of these couplings
to suppress spurious spin excitations owing to the spin-orbit force in free
translational motion of a nucleus but show that in a collision situation there
is a strong spin excitation even in spin-saturated systems which persists in
the departing fragments. The energy loss is considerably increased by the
odd-odd terms.


title: Thermal Dimuon Yields at NA60

abstract:
  Dilepton emission rates from a hadronic gas at finite temperature and baryon
density are completely constrained by broken chiral symmetry in a density
expansion. The rates can be expressed in terms of vacuum correlations which are
measured in $e^+e^-$ annihilation, $\tau$ decays and photo-reactions on
nucleons and nuclei. In this paper, the theoretical results are summarized and
the total dimuon yield is calculated by integrating the dimuon rates over the
space-time history of a fireball based on hydrodynamic calculations with CERN
SPS conditions. The resulting dimuon yield is in good agreement with the recent
measurements reported by NA60.


title:
Collective-coupling analysis of spectra of mass-7 isobars: ^7He, ^7Li,
  ^7Be, ^7B

abstract:
  A nucleon-nucleus interaction model has been applied to ascertain the
underlying character of the negative-parity spectra of four isobars of mass
seven, from neutron-- to proton--emitter driplines. With one single nuclear
potential defined by a simple coupled-channel model, a multichannel algebraic
scattering approach (MCAS) has been used to determine the bound and resonant
spectra of the four nuclides, of which ^7He and ^7B are particle unstable.
Incorporation of Pauli blocking in the model enables a description of all known
spin-parity states of the mass-7 isobars. We have also obtained spectra of
similar quality by using a large space no-core shell model. Additionally, we
have studied ^7Li and ^7Be using a dicluster model. We have found a
dicluster-model potential that can reproduce the lowest four states of the two
nuclei, as well as the relevant low-energy elastic scattering cross sections.
But, with this model, the rest of the energy spectra cannot be obtained.


title: Isospin asymmetry in nuclei and nuclear symmetry energy

abstract:
  The volume and surface symmetry parts of the nuclear symmetry energy and
other coefficients of the liquid droplet model are determined from the measured
atomic masses by the maximum likelihood estimator. The volume symmetry energy
coefficient extracted from finite nuclei provides a constraint on the nuclear
symmetry energy. This approach also yields the neutron skin of a finite nucleus
through its relationship with the volume and surface symmetry terms and the
Coulomb energy coefficient. The description of nuclear matter from the
isoscalar and isovector components of the density dependent M3Y effective
interaction provide a value of the symmetry energy that is consistent with the
empirical value of the symmetry energy extracted from measured atomic masses
and with other modern theoretical descriptions of nuclear matter.


title:
Evolution of the symmetry energy of hot neutron-rich matter formed in
  heavy-ion reactions

abstract:
  It is shown that the experimentally observed decrease of the nuclear symmetry
energy with the increasing centrality or the excitation energy in isotopic
scaling analyses of heavy-ion reactions can be well understood analytically
within a degenerate Fermi gas model. The evolution of the symmetry energy is
found to be mainly due to the variation in the freeze-out density rather than
temperature. The isoscaling analyses are useful for probing the interaction
part of the nuclear symmetry energy, provided that both the freeze-out
temperature and density of the fragments can be inferred simultaneously from
the experiments.


title: Multifragmentation and Symmetry Energy Studied with AMD

abstract:
  The antisymmetrized molecular dynamics (AMD) simulations suggest that the
isospin composition of fragments produced dynamically in multifragmentation
reactions is basically governed by the symmetry energy of low-density uniform
nuclear matter rather than the symmetry energy for the ground-state finite
nuclei. After the statistical secondary decay of the excited fragments, the
symmetry energy effect still remains in the fragment isospin composition,
though the effect in the isoscaling parameter seems a very delicate problem.


title:
Anomalous dimensions determine the power counting -- Wilsonian RG
  analysis of nuclear EFT --

abstract:
  The Legendre flow equation, a version of exact Wilsonian renormalization
group (WRG) equation, is employed to consider the power counting issues in
Nuclear Effective Field Theory. A WRG approach is an ideal framework because it
is nonperturbative and does not require any prescribed power counting rule. The
power counting is determined systematically from the scaling dimensions of the
operators at the nontrivial fixed point. The phase structure is emphasized and
the inverse of the scattering length, which is identified as a relevant
coupling, is shown to play a role of the order parameter. The relations to the
work done by Birse, McGovern, and Richardson and to the Kaplan-Savage-Wise
scheme are explained.


title: Charged and neutral hyperonic effects on the driplines

abstract:
  Modification of neutron and proton driplines by the capture of strange
hyperon(s) by normal nuclei has been investigated. A generalised mass formula
(BWMH) based on the strangeness dependent extended liquid drop model is used to
calculate the binding energy of normal nuclei as well as strange hypernuclei.
The neutron (Sn) and proton (Sp) separation energies of all hypernuclei with
neutral hyperons Lambda, double Lambda or charged hyperons Cascade(-), Theta(+)
inside are calculated using BWMH mass formula. The normal neutron and proton
driplines get modified due to the addition of the hyperon(s)(Lambda, double
Lambda, Cascade(-), Theta(+) etc.) to the core of normal nuclei. The
hypernuclei containing the charged hyperon(s) like those with neutral
hyperon(s) have similar nucleon separation energies like core nuclei if proton
number instead of net charge is used in the symmetry term. Due to the effect of
opposite charges present in Theta(+) and Cascade(-), hyperons their
corresponding driplines get separated from each other. All the hyperons modify
mean field potential due to strong hyperon-nucleon coupling. Addition of a
single charged hyperon in normal nuclei affects the entire proton drip line
more prominently than that by neutral hyperon. The neutral hyperonic effect on
proton dripline is significant for lighter nuclei than for heavier ones whereas
both the charged as well as neutral hyperons affect almost the entire neutron
dripline.


title: Isospin violation in the vector form factors of the nucleon

abstract:
  A quantitative understanding of isospin violation is an increasingly
important ingredient for the extraction of the nucleon's strange vector form
factors from experimental data. We calculate the isospin violating electric and
magnetic form factors in chiral perturbation theory to leading and
next-to-leading order respectively, and we extract the low-energy constants
from resonance saturation. Uncertainties are dominated largely by limitations
in the current knowledge of some vector meson couplings. The resulting bounds
on isospin violation are sufficiently precise to be of value to on-going
experimental studies of the strange form factors.


title:
Global Examination of the $^{12}$C+$^{12}$C Reaction Data at Low and
  Intermediate Energies

abstract:
  We examine the $^{12}$C+$^{12}$C elastic scattering over a wide energy range
from 32.0 to 70.7 MeV in the laboratory system within the framework of the
Optical model and the Coupled-Channels formalism. The $^{12}$C+$^{12}$C system
has been extensively studied within and over this energy range in the past.
These efforts have been futile in determining the shape of the nuclear
potential in the low energy region and in describing the individual angular
distributions, single-angle 50$^{0}$ to 90$^{0}$ excitation functions and
reaction cross-section data simultaneously. In order to address these problems
systematically, we propose a potential that belongs to a family other than the
one used to describe higher energy experimental data and show that it is
possible to use it over this wide energy range. This potential also predicts
the resonances at correct energies with reasonable widths.


title: Hydrodynamic Models for Heavy Ion Collisions

abstract:
  Application of hydrodynamics for modeling of heavy-ion collisions is
reviewed. We consider several physical observables that can be calculated in
this approach and compare them to the experimental measurements.


title:
Critical Survey of Isoscalar and Isovector Contributions to the Spin
  Orbit Potential in Relativistic Mean Field Theory

abstract:
  The spin-orbit (SO) interaction, emerging naturally from the Relativistic
Mean Field (RMF) theory is examined critically in the light of the recently
measured excitation energy differences between the terminating states built on
two different configurations for nuclei belonging to the lower pf shell. The
calculations are carried out using the cranked RMF framework. To further probe
the iso-vector dependence of the spin-orbit potential, the energy spacing
between the g_{7/2} and h_{11/2} states in the Sb-chain is compared to
experiment. It is found that the calculation at the quantitative level deviates
strongly from the experiment. In particular the balance of the iso-scalar and
iso-vector strengths of the effective one body SO potential indicates that
additional terms like tensor couplings may be needed to account for the
experimental data.


title:
Role of the boundary conditions in the Wigner-Seitz approximation
  applied to the neutron star inner crust

abstract:
  The influence of the boundary conditions used in the Wigner-Seitz (WS)
approximation applied to the neutron star inner crust is examined. The
generalized energy functional method which includes the neutron and proton
pairing correlations is used. Predictions of two versions of the boundary
conditions are compared with each other. The uncertainties in the equilibrium
configuration (Z,R_c) of the crust, where Z is the proton charge and R_c, the
radius of the WS cell, correspond to variation of Z by 2 - 6 units and of R_c,
by 1 - 2 fm. The effect of the boundary conditions is enhanced at increasing
density. These uncertainties are smaller than the variation of Z and R_c coming
from the pairing effects.
  In the case of high densities, k_F greater than 1 1/fm, the most important
uncertainty occurs in the value of the neutron gap. In the WS approximation, it
originates from the shell effect in the neutron single-particle spectrum which
is rather pronounced in the case of larger k_F and, correspondingly, small R_c
values, but it becomes negligible at lower density near the drip point. An
approximate recipe to avoid this uncertainty is suggested.


title: Exactly-solvable models of proton and neutron interacting bosons

abstract:
  We describe a class of exactly-solvable models of interacting bosons based on
the algebra SO(3,2). Each copy of the algebra represents a system of neutron
and proton bosons in a given bosonic level interacting via a pairing
interaction. The model that includes s and d bosons is a specific realization
of the IBM2, restricted to the transition regime between vibrational and
gamma-soft nuclei. By including additional copies of the algebra, we can
generate proton-neutron boson models involving other boson degrees of freedom,
while still maintaining exact solvability. In each of these models, we can
study not only the states of maximal symmetry, but also those of mixed
symmetry, albeit still in the vibrational to gamma-soft transition regime.
Furthermore, in each of these models we can study some features of F-spin
symmetry breaking. We report systematic calculations as a function of the
pairing strength for models based on s, d, and g bosons and on s, d, and f
bosons. The formalism of exactly-solvable models based on the SO(3,2) algebra
is not limited to systems of proton and neutron bosons, however, but can also
be applied to other scenarios that involve two species of interacting bosons.


title:
The eccentricity in heavy-ion collisions from Color Glass Condensate
  initial conditions

abstract:
  The eccentricity in coordinate-space at midrapidity of the overlap zone in
high-energy heavy-ion collisions predicted by the $k_\perp$-factorization
formalism is generically larger than expected from scaling with the number of
participants. We provide a simple qualitative explanation of the effect which
shows that it is not caused predominantly by edge effects. We also show that it
is quite insensitive to ``details'' of the unintegrated gluon distribution
functions such as the presence of leading-twist shadowing and of an extended
geometric scaling window. The larger eccentricity increases the azimuthal
asymmetry of high transverse momentum particles. Finally, we point out that the
longitudinal structure of the Color Glass Condensate initial condition for
hydrodynamics away from midrapidity is non-trivial but requires understanding
of large-$x$ effects.


title:
The Neutrino Response of Low-Density Neutron Matter from the Virial
  Expansion

abstract:
  We generalize our virial approach to study spin-polarized neutron matter and
the consistent neutrino response at low densities. In the long-wavelength
limit, the virial expansion makes model-independent predictions for the density
and spin response, based only on nucleon-nucleon scattering data. Our results
for the neutrino response provide constraints for random-phase approximation or
other model calculations, and we compare the virial vector and axial response
to response functions used in supernova simulations. The virial expansion is
suitable to describe matter near the supernova neutrinosphere, and this work
extends the virial equation of state to predict neutrino interactions in
neutron matter.


title:
Analysis of the consistency of kaon photoproduction data with Lambda in
  the final state

abstract:
  The recent CLAS 2005, SAPHIR 2003, LEPS, and the old, pre-1972, data on K^+
Lambda photoproduction are compared with theoretical calculations in the energy
region of E_gamma^lab < 2.6 GeV in order to learn about their mutual
consistency. The isobaric models Kaon-Maid and Saclay-Lyon, along with new fits
to the CLAS data are utilized in this analysis. The SAPHIR 2003 data are shown
to be coherently shifted down with respect to the CLAS, LEPS, and pre-1972
data, especially at forward kaon angles. The CLAS, LEPS, and pre-1972 data in
the forward hemisphere can be described satisfactorily by using the isobaric
model without hadronic form factors. The inclusion of the hadronic form factors
yields a strong suppression of the cross sections at small kaon angles and c.m.
energies larger than 1.9 GeV, which is not observed in the existing
experimental data. We demonstrate that the discrepancy between the CLAS and
SAPHIR data has a significant impact on the predicted values of the mass and
width of the ``missing-resonance'' D_{13}(1895) in the Kaon-Maid model.


title:
Semiclassical expansion of quantum characteristics for many-body
  potential scattering problem

abstract:
  In quantum mechanics, systems can be described in phase space in terms of the
Wigner function and the star-product operation. Quantum characteristics, which
appear in the Heisenberg picture as the Weyl's symbols of operators of
canonical coordinates and momenta, can be used to solve the evolution equations
for symbols of other operators acting in the Hilbert space. To any fixed order
in the Planck's constant, many-body potential scattering problem simplifies to
a statistical-mechanical problem of computing an ensemble of quantum
characteristics and their derivatives with respect to the initial canonical
coordinates and momenta. The reduction to a system of ordinary differential
equations pertains rigorously at any fixed order in $\hbar$. We present
semiclassical expansion of quantum characteristics for many-body scattering
problem and provide tools for calculation of average values of time-dependent
physical observables and cross sections. The method of quantum characteristics
admits the consistent incorporation of specific quantum effects, such as
non-locality and coherence in propagation of particles, into the semiclassical
transport models. We formulate the principle of stationary action for quantum
Hamilton's equations and give quantum-mechanical extensions of the Liouville
theorem on the conservation of phase-space volume and the Poincar\'e theorem on
the conservation of $2p$ forms. The lowest order quantum corrections to the
Kepler periodic orbits are constructed. These corrections show the resonance
behavior.

categories: nucl-th hep-th math-ph math.DS math.MP quant-ph


title:
Tensor electric polarizability of the deuteron in storage-ring
  experiments

abstract:
  The tensor electric polarizability of the deuteron gives important
information about spin-dependent nuclear forces. If a resonant horizontal
electric field acts on a deuteron beam circulating into a storage ring, the
tensor electric polarizability stimulates the buildup of the vertical
polarization of the deuteron (the Baryshevsky effect). General formulas
describing this effect have been derived. Calculated formulas agree with the
earlier obtained results. The problem of the influence of tensor electric
polarizability on spin dynamics in such a deuteron electric-dipole-moment
experiment in storage rings has been investigated. Doubling the resonant
frequency used in this experiment dramatically amplifies the Baryshevsky effect
and provides the opportunity to make high-precision measurements of the
deuteron's tensor electric polarizability.


title: Probing internucleus potential with large-angle quasi-elastic scattering

abstract:
  Recent measurements for fusion cross section at energies around the Coulomb
barrier have systematically indicated a significant deviation of fusion cross
sections from a prediction of double-folding model. It has been argued that the
deviation can be accounted for if one uses a large value of surface diffuseness
parameter for a Woods-Saxon internuclear potential. We investigate this problem
using large-angle quasi-elastic scattering, that is a good counterpart of
fusion reaction. Towards a reconciliation of the apparent anomaly in the
diffuseness parameter for fusion reactions, we also discuss possible
ingredients which are missing in present nuclear reaction models. Those include
a deviation from the frozen density approximation, the effect of
antisymmetrization and the role of coordinate dependent moment of inertia for
the relative motion between the colliding nuclei.


title: Quantum calculation of Coulomb reorientation and near-barrier fusion

abstract:
  We investigate the role of deformation on the fusion probability around the
barrier using the Time-Dependent Hartree-Fock theory with a full Skyrme force.
We obtain a distribution of fusion probabilities around the nominal barrier due
to the different contributions of the various orientations of the deformed
nucleus at the touching point. It is also shown that the long range Coulomb
reorientation reduces the fusion probability around the barrier.


title: Azimuthal flow of decay photons in relativistic nuclear collisions

abstract:
  An overwhelming fraction of photons from relativistic heavy ion collisions
has its origin in the decay of $\pi^0$ and $\eta$ mesons. We calculate the
azimuthal asymmetry of the decay photons for several azimuthally asymmetric
pion distributions. We find that the $k_T$ dependence of the elliptic flow
parameter$v_2$ for the decay photons closely follows the elliptic flow
parameter $v_2^{\pi^0}$ evaluated at $p_T \approx k_T+\delta$, where
$\delta\approx$ 0.1 -- 0.2 GeV, for typical pion distributions measured in
nucleus-nucleus collisions at relativistic energies. Similar results are
obtained for photons from the 2-$\gamma$ decay of $\eta$ mesons. Assuming that
the flow of $\pi^0$ is similar to those for $\pi^+$ and $\pi^-$ for which
independent measurements would be generally available, this ansatz can help in
identifying additional sources for photons. Taken along with quark number
scaling suggested by the recombination model, it may help to estimate $v_2$ of
the parton distributions in terms of azimuthal asymmetry of the decay photons
at large $k_T$.


title: Removal of forbidden states in a three-$\alpha$ system

abstract:
  The ground and excited 0$^+$ states of $^{12}$C are investigated in a
3$\alpha$ macroscopic model using the deep potential of Buck, Friedrich and
Wheatley. The elimination of forbidden states is performed either by
constructing the allowed state space explicitly or by using the orthogonalizing
pseudopotential. The well-known enigmatic behavior of the latter approach is
resolved. It is safe to define the forbidden states referring to the underlying
microscopic model.


title: Patches to UrQMD Model Code

abstract:
  Patches to the code of the Ultra-relativisic Quantum Molecular Dynamics model
(UrQMD version 1.3) are described. They improve the code operation. The most
important one is done for the file ANNDEC.F.


title:
Scaling of Anisotropic Flow and Momentum-Space Densities for Light
  Particles in Intermediate Energy Heavy Ion Collisions

abstract:
  Anisotropic flows ($v_2$ and $v_4$) of light nuclear clusters are studied by
Isospin-Dependent Quantum Molecular Dynamics model for the system of $^{86}$Kr
+ $^{124}$Sn at intermediate energy and large impact parameters.
Number-of-nucleon scaling of the elliptic flow ($v_2$) are demonstrated for the
light fragments up to $A$ = 4, and the ratio of $v_4/v_2^2$ shows a constant
value of 1/2. In addition, the momentum-space densities of different clusters
are also surveyed as functions of transverse momentum, in-plane transverse
momentum and azimuth angle relative to the reaction plane. The results can be
essentially described by momentum-space power law. All the above phenomena
indicate that there exists a number-of-nucleon scaling for both anisotropic
flow and momentum-space densities for light clusters, which can be understood
by the coalescence mechanism in nucleonic degree of freedom for the cluster
formation.


title: On three topical aspects of the N=28 isotonic chain

abstract:
  The evolution of single-particle orbits along the N=28 isotonic chain is
studied within the framework of a relativistic mean-field approximation. We
focus on three topical aspects of the N=28 chain: (a) the emergence of a new
magic number at Z=14; (b) the possible erosion of the N=28 shell; and (c) the
weakening of the spin-orbit splitting among low-j neutron orbits. The present
model supports the emergence of a robust Z=14 subshell gap in 48Ca, that
persists as one reaches the neutron-rich isotone 42Si. Yet the proton removal
from 48Ca results in a significant erosion of the N=28 shell in 42Si. Finally,
the removal of s1/2 protons from 48Ca causes a ~50% reduction of the spin-orbit
splitting among neutron p-orbitals in 42Si.


title: Deuteron Matrix Elements in Chiral Effective Theory at Leading Order

abstract:
  We consider matrix elements of two-nucleon operators that arise in chiral
effective theories of the two-nucleon system. Generically, the short-distance
piece of these operators scales as 1/r^n, with r the relative separation of the
two nucleons. We show that, when evaluated between the leading-order wave
functions obtained in this effective theory, these two-nucleon operators are
independent of the cutoff used to renormalize the two-body problem for n=1 and
2. However, for n greater than or equal to 3 general arguments about the
short-distance behavior of the leading-order deuteron wave function show that
the matrix element will diverge.


title:
Geoantineutrino Spectrum, 3He/4He-ratio Distribution in the Earth's
  Interior and Slow Nuclear Burning on the Boundary of the Liquid and Solid
  Phases of the Earth's Core

abstract:
  The description problem of geoantineutrino spectrum and reactor antineutrino
experimental spectrum in KamLAND, which takes place for antineutrino energy
\~2.8 MeV, and also the experimental results of the interaction of uranium
dioxide and carbide with iron-nickel and silicaalumina melts at high pressure
(5-10 GP?) and temperature (1600-2200C) have motivated us to consider the
possible consequences of the assumption made by V.Anisichkin and coauthors that
there is an actinid shell on boundary of liquid and solid phases of the Earth's
core. We have shown that the activation of a natural nuclear reactor operating
as the solitary waves of nuclear burning in 238U- and/or 232Th-medium (in
particular, the neutron- fission progressive wave of Feoktistov and/or
Teller-Ishikawa-Wood) can be such a physical consequence. The simplified model
of the kinetics of accumulation and burnup in U-Pu fuel cycle of Feoktistov is
developed. The results of the numerical simulation of neutron-fission wave in
two-phase UO2/Fe medium on a surface of the Earth's solid core are presented.
The georeactor model of 3He origin and the 3He/4He-ratio distribution in the
Earth's interior is offered. It is shown that the 3He/4He ratio distribution
can be the natural quantitative criterion of georeactor thermal power. On the
basis of O'Nions-Evensen-Hamilton geochemical model of mantle differentiation
and the crust growth supplied by actinid shell on the boundary of liquid and
solid phases of the Earth's core as a nuclear energy source (georeactor with
power of 30 TW), the tentative estimation of geoantineutrino intensity and
geoantineutrino spectrum on the Earth surface are given.


title:
Nuclear Excitations Described by Randomly Selected Multiple Slater
  Determinants

abstract:
  We propose a new stochastic method to describe low-lying excited states of
finite nuclei superposing multiple Slater determinants without assuming
generator coordinates a priori. We examine accuracy of our method by using
simple BKN interaction.


title:
Parity-projected Skyrme Hartree-Fock and angular momentum projection
  approach to Mg isotopes

abstract:
  We perform calculations of the variation after parity projection with Skyrme
interaction for ground and excited states of even-even Mg isotopes. Using the
3D real-space representation, we can take into account any kind of deformation;
e.g., cluster structure, gamma-deformation. We also perform the full 3D angular
momentum projection to obtained rotational spectra and B(E2). In 24Mg, the
ground K^pi=0+ and several odd-parity bands are calculated. In 30,32,34Mg, our
calculation reproduces a breaking of the N=20 magic number, so-called "Island
of inversion" phenomena. Properties of both the ground and excited states are
reasonably reproduced.


title:
Fusion reaction of halo nuclei: A real-time wave-packet method for
  three-body tunneling dynamics

abstract:
  We investigate fusion cross section of a nucleus with a valence neutron,
using the time-dependent wave-packet method. For a stable projectile, in which
the valence neutron is tightly bound (e_n < -3 MeV), the neutron could enhance
the fusion probability when the matching condition of orbital energies are
satisfied. In contrast, for a halo nucleus, in which the binding energy of the
neutron is very small (e_n>-1 MeV), the fusion probability is hindered by the
presence of the weakly bound neutron.


title:
Near-barrier Fusion Induced by Stable Weakly Bound and Exotic Halo Light
  Nuclei

abstract:
  The effect of breakup is investigated for the medium weight
$^{6}$Li+$^{59}$Co system in the vicinity of the Coulomb barrier. The strong
coupling of breakup/transfer channels to fusion is discussed within a
comparison of predictions of the Continuum Discretized Coupled-Channels model
which is also applied to $^{6}$He+$^{59}$Co a reaction induced by the borromean
halo nucleus $^{6}$He.


title:
Shell model test of quadrupole properties predicted by the rotational
  formula--the degenerate SDI interaction and non-degenerate FPD6

abstract:
  In the rotational model for a K=0 band in an even-even nucleus, there is a
single parameter--Q_0, the intrinsic quadrupole moment. All B(E2)'s in the band
and all static quadrupole moments are expressed in terms of this one parameter.
In shell-model calculations, this does not have to be the case. In this work,
we consider ground-state bands in {44}Ti, {46}Ti, {48}Ti, {48}Cr, and {50}Cr.
We have two models. First, we use a Surface Delta Interaction with degenerate
single-particle energies (SDI-deg). We compare this with results of a
shell-model calculation using the standard interaction FPD6 and include the
single-particle energy splitting. Neither model yields a perfect rotational
I(I+1) spectrum, although the SDI-deg model comes somewhat closer. Overall, the
simple rotational formula for B(E2)'s and static quadrupole moments hangs
together very nicely.


title: Conserved electromagnetic currents in a relativistic optical model

abstract:
  A simple model of a relativistic optical model is constructed by reducing the
three-body Bethe-Salpeter equation to an effective two-body optical model. A
corresponding effective current is derived for use with the optical-model wave
functions. It is shown that this current satisfies a Ward-Takahashi identity
involving the optical potential which results in conserved current matrix
elements.


title:
Dynamical collective potential energy landscape: its impact on the
  competition between fusion and quasi-fission in a heavy fusing system

abstract:
  A realistic microscopically-based quantum approach to the competition between
fusion and quasi-fission in a heavy fusing system is applied to several
reactions leading to $^{256}$No. Fusion and quasi-fission are described in
terms of a diffusion process of nuclear shapes through a dynamical collective
potential energy landscape which is initially diabatic and gradually becomes
adiabatic. The microscopic ingredients of the theory are obtained with a
realistic two-center shell model based on Woods-Saxon potentials. The results
indicate that (i) the diabatic effects play a very important role in the onset
of fusion hindrance for heavy systems, and (ii) very asymmetric reactions
induced by closed shell nuclei seem to be the best suited to synthesize the
heaviest compound nuclei.


title:
Quantum Monte-Carlo methods and exact treatment of the two-body problem
  with Hartree-Fock Bogoliubov states

abstract:
  In this article, we show that the exact two-body problem can be replaced by
quantum jumps between densities written as $D=| \Psi_a \right> \left< \Psi_b |$
where $| \Psi_a \right>$ and $| \Psi_b \right>$ are vacuum for different
quasi-particles operators. It is shown that the stochastic process can be
written as a Stochastic Time-Dependent Hartree-Fock Bogoliubov theory
(Stochastic TDHFB) for the generalized density ${\cal R}$ associated to $D$
where ${\cal R}^2 = {\cal R}$ along each stochastic trajectory.


title: Applications of Continuum Shell Model

abstract:
  The nuclear many-body problem at the limits of stability is considered in the
framework of the Continuum Shell Model that allows a unified description of
intrinsic structure and reactions. Technical details behind the method are
highlighted and practical applications combining the reaction and structure
pictures are presented.


title: Open-charm enhancement at FAIR?

abstract:
  We have calculated the D-meson spectral density at finite temperature within
a self-consistent coupled-channel approach that generates dynamically the
$\Lambda_c$ (2593) resonance. We find a small mass shift for the D-meson in
this hot and dense medium while the spectral density develops a sizeable width.
The reduced attraction felt by the D-meson in hot and dense matter together
with the large width observed have important consequences for the D-meson
production in the future CBM experiment at FAIR.


title:
Propagation of broad meson resonances in a BUU type transport model:
  Application to di-electron production

abstract:
  We apply a BUU type transport model for the interpretation of the di-electron
invariant mass spectrum measured by the HADES collaboration for the reaction
C(2 AGeV) + C. Our model incorporates the propagation of broad meson resonances
emerging from the decay of baryon resonances.


title:
Forward Production With Large p/\pi Ratio and Without Jet Structure at
  Any p_T

abstract:
  Particle production in the forward region of heavy-ion collisions is shown to
be due to parton recombination without shower partons. The regeneration of soft
partons due to momentum degradation through the nuclear medium is considered.
The degree of degradation is determined by fitting the $\bar p/p$ ratio. The
data at $\sqrt s=62.4$ GeV and $\eta=3.2$ from BRAHMS on the $p_T$ distribution
of average charged particles are well reproduced. Large proton-to-pion ratio is
predicted. The particles produced at any $p_T$ should have no associated
particles above background to manifest any jet structure.


title:
Particle distribution and nuclear stopping in Au-Au collisions at
  $\sqrt{s_{NN}}$=200 GeV

abstract:
  The transverse momentum distribution of produced charged particles is
investigated for gold-gold collisions at $\sqrt{s_{NN}}=200$ GeV. A simple
parameterization is suggested for the particle distribution based on the
nuclear stopping effect. The model can fit very well both the transverse
momentum distributions at different pseudo-rapidities and the pseudo-rapidity
distributions at different centralities. The ratio of rapidity distributions
for peripheral and central collisions is calculated and compared with the data.


title: Web-page on UrQMD Model Validation

abstract:
  A WEB-page containing materials of comparing experimental data and UrQMD
model calculations has been designed. The page provides its user with a variety
of tasks solved with the help of the model, accuracy and/or quality of
experimental data description, and so on. The page can be useful for new
experimental data analysis, or new experimental research planning.
  The UrQMD model is cited in more than 272 publications. Only 44 of them
present original calculations. Their main results on the model are presented on
the page.


title:
Electromagnetic corrections to the dominant two-pion exchange
  nucleon-nucleon potential

abstract:
  We calculate at two-loop order in chiral perturbation theory the
electromagnetic corrections to the dominant two-pion exchange nucleon-nucleon
interaction that is generated by the isoscalar $\pi N$ contact-vertex
proportional to the large low-energy constant $c_3$. We find that the
respective $2\pi\gamma$-exchange potential contains sizeable isospin-breaking
components which amount to about -1% of the strongly attractive isoscalar
central $2\pi$-exchange potential. The typical value of these novel
charge-independence and charge-symmetry breaking central potentials is $0.3
$MeV at a nucleon distance of $r= m_\pi^{-1} = 1.4 $fm. Our analytical result
for this presumably dominant $2\pi\gamma$-exchange interaction is in a form
such that it can be easily implemented into phase-shift analyses and few-body
calculations.


title:
Medium effects on phi decays to dilepton and kaon-antikaon pairs in
  relativistic heavy ion reactions

abstract:
  We consider the role of rescattering of secondary kaons on the dilepton
branching ratio of the phi meson. In-medium mass modifications and broadening
of kaons and phi mesons are taken into account. We find in the framework of a
Bjorken scenario for the time evolution of the expanding fireball that the phi
yield from dimuons is moderately or at least only slightly enhanced compared to
that from kaon-antikaon pairs. The relation to experimental yields measured by
the NA49, NA50 and CERES Collaborations at CERN SPS and the PHENIX
Collaboration at RHIC is discussed.


title: From multifragmentation to supernovae and neutron stars

abstract:
  The thermodynamics properties of globally neutral dense stellar matter are
analyzed both in terms of mean field instabilities and structures beyond the
mean field. The mean field response to finite wavelenght fluctuations is
calculated with the realistic Sly230a effective interaction. A Monte Carlo
simulation of a schematic lattice Hamiltonian shows the importance of
calculations beyond the mean field to calculate the phase diagram of stellar
matter. The analogies and differences respect to the thermodynamics of nuclear
matter and finite nuclei are stressed.


abstract:
  Nuclear model effects in neutrino-nucleus quasielastic scattering are studied
within the distorted wave impulse approximation, using a relativistic shell
model to describe the nucleus, and comparing it with the relativistic Fermi
gas. Both charged-current and neutral-current processes are considered and, for
the neutral-current case, the uncertainties that nuclear effects may introduce
in measurements of the axial strange form-factor of the nucleon are
investigated.


title: Universal scaling of the elliptic flow at RHIC

abstract:
  Recent PHOBOS measurements of the excitation function for the pseudo-rapidity
dependence of elliptic flow in Au+Au collisions at RHIC, have posed a
significant theoretical challenge. We show here that these data are described
by the Buda-Lund model. A universal scaling curve, predicted by the Buda-Lund
hydro model, describes not only PHOBOS data, but also recent, detailed PHENIX
and STAR elliptic flow data. This is a consequence of perfect fluid
hydrodynamics as implemented in the Buda-Lund hydro model.


title:
Failure of the Standard Coupled-Channels Method in Describing the
  Inelastic Reaction Data: On the Use of a New Shape for the Coupling Potential

abstract:
  We present the failure of the standard coupled-channels method in explaining
the inelastic scattering together with other observables such as elastic
scattering, excitation function and fusion data. We use both microscopic
double-folding and phenomenological deep potentials with shallow imaginary
components. We argue that the solution of the problems for the inelastic
scattering data is not related to the central nuclear potential, but to the
coupling potential between excited states. We present that these problems can
be addressed in a systematic way by using a different shape for the coupling
potential instead of the usual one based on Taylor expansion.


title: Classical Strongly Coupled QGP II: Screening and Equation of State

abstract:
  We analyze the screening and bulk energy of a classical and strongly
interacting plasma of color charges, a model we recently introduced for the
description of a quark-gluon plasma at T=(1-3)Tc. The partition function is
organized around the Debye-Huckel limit. The linear Debye-Huckel limit is
corrected by a virial expansion. For the pressure, the expansion is badly
convergent even in the dilute limit. The non-linear Debye-Huckel theory is
studied numerically as an alternative for moderately strong plasmas. We use
Debye theory of solid to extend the analysis to the crystal phase at very
strong coupling. The analytical results for the bulk energy per particle
compare well with the numerical results from molecular dynamics simulation for
all couplings.


title: Structure of ground and excited states of $^{12}$C

abstract:
  We studied the ground and excited states of $^{12}$C based on variational
calculations after spin-parity projection in a framework of antisymmetrized
molecular dynamics(AMD). The calculations systematically reproduce various
experimental data. It was found that the sub-shell closure and SU(3)-limit
$3\alpha$ cluster components are contained in the ground state, while various
$3\alpha$ cluster structures develop in the excited states. We discussed
effects of $\alpha$ breaking and show the importance of coexistence of the
cluster and shell-model-like aspects.


title: Local Fermi gas in inclusive muon capture from nuclei

abstract:
  We compare local Fermi gas and shell model in muon capture in nuclei in order
to estimate the effect of finite nuclear size in low energy weak reactions.


title:
Lorentz boosted nucleon-nucleon potential applied to the 3He(e,e'p)pn
  and 3He(e,e'n)pp processes

abstract:
  We formulate an approximate relativistic framework for an analysis of the
3He(e,e'p)pn and 3He(e,e'n)pp reactions with polarized electrons and 3He in the
initial state. Restricting the rescattering series to one term linear in the
two-nucleon t-matrix we incorporate various relativistic features when
calculating a nuclear current matrix element. These relativistic ingredients
encompass the relativistic 3He wave function based on the concept of the
Lorentz boosted nucleon-nucleon potential together with the boosted 2N
t-matrix, relativistic kinematics and relativistic single-nucleon current
operator. This allows us to estimate the magnitude of relativistic effects not
included in the standard nonrelativistic approach.


title: Hyperon-nucleon interactions - a chiral effective field theory approach

abstract:
  We construct the leading order hyperon-nucleon potential in chiral effective
field theory. We show that a good description of the available data is possible
and discuss briefly further improvements of this scheme.


title: Random Phase Approximation and neutrino-nucleus cross sections

abstract:
  The Random Phase Approximation theory is used to calculate the total cross
sections of electron neutrinos on $^{12}$C nucleus. The role of the excitation
of the discrete spectrum is discussed. A comparison with electron scattering
and muon capture data is presented. The cross section of electron neutrinos
coming from muon decay at rest is calculated.


title:
The order, shape and critical point for the quark-gluon plasma phase
  transition

abstract:
  The order, shape and critical point for the phase transition between the
hadronic matter and quark-gluon plasma are considered in a thermodynamical
consistent approach. The hadronic phase is taken as Van der Waals gas of all
the known hadronic mass spectrum particles $m_H\le 2.0$ GeV as well as Hagedorn
bubbles which correspond hadronic states with mass spectrum $m_H> 2.0$ GeV. The
density of states for Hagedorn bubbles is derived by calculating the
microcanonical ensemble for a bag of quarks and gluons with specific internal
color-flavor symmetry. The mixed-grand and microcanonical ensembles are derived
for massless and massive flavors. We find Hagedorn bubbles are strongly
suppressed in the dilute hadronic matter and they appear just below the line of
the phase transition. The order of the phase transition depends on Hagedorn
bubble's internal color-flavor structure and the volume fluctuation as well. On
the other hand, the highly compressed hadronic matter undergoes a smooth phase
transition from the gas of known mass spectrum hadrons to another one dominated
by Hagedorn bubbles with specific internal color-flavor structure before the
phase transition to quark-gluon plasma takes place at last. The phase
transition is found a first order for the intermediate and large chemical
potentials. The existence of the tri-critical point depends on the modification
of the bubble's internal structure specified by a phenomenological parameter
$\gamma\propto\mu_B$ in the medium.


title: Relativistic Coulomb excitation at small impact parameters

abstract:
  The semiclassical model of relativistic Coulomb excitation is studied in
situations in which the impact parameter is small enough so that projectile and
target charge distributions overlap. The electromagnetic effects of this
overlap are shown to be small. Realistic nucleon-nucleon reaction
cross-sections, and realistic nuclear radial charge and matter distributions
are used to determine a formula for the lower impact parameter limit to be used
in the calculation of the Coulomb excitation cross-section. A wide selection of
projectile-target pairs is explored, in the bombarding energy range of 1 GeV to
5 GeV per nucleon.


title:
Suppression of statistical background in the event structure of
  away-side $\Delta\phi$ distribution

abstract:
  An approach is proposed to analyze the azimuthal distribution of particles
produced on the away side in heavy-ion collisions without background
subtraction. Measures in terms of factorial moments are suggested that can
suppress the statistical background, while giving clear distinction between
one-jet and two-jet event structures on the away side. It is also possible to
map the position and strength of the recoil jet to suitably chosen asymmetry
moments.


title: $^{22}$C: $S$-Wave Two-Neutron Halo

abstract:
  A dripline nucleus $^{22}$C is studied in a Borromean three-body model of
$^{20}$C+$n$+$n$. The valence neutrons, interacting via a realistic potential,
are constrained to be orthogonal to the occupied orbits in $^{20}$C. We obtain
ample results supporting that $^{22}$C is an ideal $S$-wave two-neutron halo
nucleus: The ground state is bound by 390-570 keV, the root mean square neutron
and proton radii are 4.0 and 2.4 fm, and the two neutrons are predominantly in
$(s_{1/2})^2$ orbits. The binding mechanism of $^{22}$C is discussed. One- and
two-body density distributions elucidate the halo character as well as the
correlated motion of the neutrons. The reaction cross sections of
$^{22}$C+$^{12}$C collisions are predicted.


title:
Benchmark calculation of inclusive electromagnetic responses in the
  four-body nuclear system

abstract:
  Both the no-core shell model and the effective interaction hyperspherical
harmonic approaches are applied to the calculation of different response
functions to external electromagnetic probes, using the Lorentz integral
transform method. The test is performed on the four-body nuclear system, within
a simple potential model. The quality of the agreement in the various cases is
discussed, together with the perspectives for rigorous ab initio calculations
of cross sections of heavier nuclei.


title:
Quark-gluon vertex dressing and meson masses beyond ladder-rainbow
  truncation

abstract:
  We include a generalized infinite class of quark-gluon vertex dressing
diagrams in a study of how dynamics beyond the ladder-rainbow truncation
influences the Bethe-Salpeter description of light quark pseudoscalar and
vector mesons. The diagrammatic specification of the vertex is mapped into a
corresponding specification of the Bethe-Salpeter kernel, which preserves
chiral symmetry. This study adopts the algebraic format afforded by the simple
interaction kernel used in previous work on this topic. The new feature of the
present work is that in every diagram summed for the vertex and the
corresponding Bethe-Salpeter kernel, each quark-gluon vertex is required to be
the self-consistent vertex solution. We also adopt from previous work the
effective accounting for the role of the explicitly non-Abelian three gluon
coupling in a global manner through one parameter determined from recent
lattice-QCD data for the vertex. With the more consistent vertex used here, the
error in ladder-rainbow truncation for vector mesons is never more than 10% as
the current quark mass is varied from the u/d region to the b region.


title: Dynamical chiral symmetry breaking and a critical mass

abstract:
  On a bounded, measurable domain of non-negative current-quark mass, realistic
models of QCD's gap equation can simultaneously admit two inequivalent
dynamical chiral symmetry breaking (DCSB) solutions and a solution that is
unambiguously connected with the realisation of chiral symmetry in the Wigner
mode. The Wigner solution and one of the DCSB solutions are destabilised by a
current-quark mass and both disappear when that mass exceeds a critical value.
This critical value also bounds the domain on which the surviving DCSB solution
possesses a chiral expansion. This value can therefore be viewed as an upper
bound on the domain within which a perturbative expansion in the current-quark
mass around the chiral limit is uniformly valid for physical quantities. For a
pseudoscalar meson constituted of equal mass current-quarks, it corresponds to
a mass m_{0^-}~0.45GeV. In our discussion we employ properties of the two DCSB
solutions of the gap equation that enable a valid definition of <bar-q q> in
the presence of a nonzero current-mass. The behaviour of this condensate
indicates that the essentially dynamical component of chiral symmetry breaking
decreases with increasing current-quark mass.


title:
Gauge-invariant approach to meson photoproduction including the
  final-state interaction

abstract:
  A fully gauge-invariant (pseudoscalar) meson photoproduction amplitude off a
nucleon including the final-state interaction is derived. The approach based on
a comprehensive field-theoretical formalism developed earlier by one of the
authors replaces certain dynamical features of the full interaction current by
phenomenological auxiliary contact currents. A procedure is outlined that
allows for a systematic improvement of this approximation. The feasibility of
the approach is illustrated by applying it to both the neutral and charged pion
photoproductions.


title:
Covariant theory of particle-vibrational coupling and its effect on the
  single-particle spectrum

abstract:
  The Relativistic Mean Field (RMF) approach describing the motion of
independent particles in effective meson fields is extended by a microscopic
theory of particle vibrational coupling. It leads to an energy dependence of
the relativistic mass operator in the Dyson equation for the single-particle
propagator. This equation is solved in the shell-model of Dirac states. As a
result of the dynamics of particle-vibrational coupling we observe a noticeable
increase of the level density near the Fermi surface. The shifts of the
single-particle levels in the odd nuclei surrounding 208-Pb and the
corresponding distributions of the single-particle strength are discussed and
compared with experimental data.


title: EMC and Polarized EMC Effects in Nuclei

abstract:
  We determine nuclear structure functions and quark distributions for $^7$Li,
$^{11}$B, $^{15}$N and $^{27}$Al. For the nucleon bound state we solve the
covariant quark-diquark equations in a confining Nambu--Jona-Lasinio model,
which yields excellent results for the free nucleon structure functions. The
nucleus is described using a relativistic shell model, including mean scalar
and vector fields that couple to the quarks in the nucleon. The nuclear
structure functions are then obtained as a convolution of the structure
function of the bound nucleon with the light-cone nucleon distributions. We
find that we are readily able to reproduce the EMC effect in finite nuclei and
confirm earlier nuclear matter studies that found a large polarized EMC effect.


title: Strangeness s = -6 dibaryon

abstract:
  The structure of $(\Omega\Omega)_{0^+}$ dibaryon with strangeness $s=-6$ is
studied in the extended chiral SU(3) quark model, in which vector meson
exchange dominates the short range interaction. The resonating group method
(RGM) is adopted, in which the $\Omega\Omega$ and $CC$ (hidden color) channels
are involved. The color screening effect and the effects of mixing of scalar
mesons on $(\Omega\Omega)_{0^+}$ are also investigated.


title: Four-Body Bound State Calculations in Three-Dimensional Approach

abstract:
  The four-body bound state with two-body interactions is formulated in
Three-Dimensional approach, a recently developed momentum space representation
which greatly simplifies the numerical calculations of few-body systems without
performing the partial wave decomposition. The obtained three-dimensional
Faddeev-Yakubovsky integral equations are solved with two-body potentials.
Results for four-body binding energies are in good agreement with achievements
of the other methods.


title: Monte Carlo Calculation for the neutron-rich Ca isotopes

abstract:
  We computed ground-state energies of calcium isotopes from 42Ca to 48Ca by
means of the Auxiliary Field Diffusion Monte Carlo (AFDMC) method. Calculations
were performed by replacing the 40Ca core with a mean-field self consistent
potential computed using Skyrme interaction. The energy of the external
neutrons is calculated by projecting the ground-state from a wave function
built with the single particle orbitals computed in the self consistent
external potential. The shells considered were the 1F_7/2 and the 1F_5/2. The
Hamiltonian employed is semi-realistic and includes tensor, spin--orbit and
three--body forces. While absolute binding energies are too deep if compared
with experimental data, the differences between the energies for nearly all
isotopes are in very good agreement with the experimental data.


title: Excited decuplet baryons from QCD sum rules

abstract:
  A calculation of the mass spectrum in the baryon decuplet sector is presented
using the method of QCD sum rules. Sum rules are derived for states of
spin-parity 3/2+- and 1/2+ using both the conventional method and a
parity-projection method. The predictive ability of the sum rules is explored
by a Monte-Carlo based analysis procedure in which the three phenomenological
parameters (mass, coupling, threshold) are treated as free parameters and
fitted simultaneously. Taken together, the results give an improved
determination of the mass spectrum in this sector from the perspective of
non-perturbative QCD.