title: On the extension of the Bethe-Weizsacker mass formula to light nuclei

abstract:
  Some general features of the Bethe-Weizsacker mass formula recently extended
to light nuclei have been explored. Though this formula improves fits to the
properties of light nuclei and it does seem to work well in delineating the
positions of all old and new magic numbers found in that region, yet it is not
well tuned for predicting finer details. The mass predictions have also been
found to be less accurate compared to those by the macroscopic-microscopic
calculations. It is concluded that such semi-empirical mass formulae can not be
a substitute for more fundamental mass formulae having its origin based upon
the basic nucleon-nucleon effective interaction.


title:
Asymmetric nuclear matter in the relativistic mean field approach with
  vector cross-interaction

abstract:
  Asymmetric nuclear matter is studied in the frame of relativistic mean-field
theory, using scalar-isoscalar sigma, vector-isoscalar omega meson together
with their selfinteractions, vector-isovector rho meson with its
cross-interaction with omega meson too, and scalar-isovector delta meson as
degrees of freedom. The model is used to parameterize the nuclear matter
properties results calculated by more fundamental Dirac-Brueckner-Hartree-Fock
theory and thus to provide an effective DBHF model applicable also to finite
nuclei. Vector omega-rho cross-interaction seems to be an useful degree of
freedom for describing of the asymmetric nuclear matter, mostly due to its
impact on density dependence of the symmetry energy.


title: Can quark effects be observed in intermediate heavy ion collisions?

abstract:
  In recent years a tentative description of the short-range part of hadron
interactions with constituent quark interchange has been developed providing an
alternative approach to meson physics. Quark interchange plays a role, for
example, in the nucleon-nucleon ($NN$) phase-shifts and cross-section. In heavy
ion collision simulations at intermediate energies one of the main features is
the $NN$ cross-section in the collisional term, where in most cases it is an
input adjusted to the free space value. In this paper we introduce the quark
degrees of freedom to the $NN$ cross-section in the Vlasov-Uehling-Uhlenbeck
(VUU) model and explore the possibility that these effects appear in the
observables at lower energies.


title:
Neutron Moderation in the Oklo Natural Reactor and the Time Variation of
  alpha

abstract:
  In the analysis of the Oklo (gabon) natural reactor to test for a possible
time variation of the fine structure constant alpha, a Maxwell-Boltzmann low
energy neutron spectrum was assumed. We present here an analysis where a more
realistic spectrum is employed and show that the most recent isotopic analysis
of samples implies a non-zero change in alpha, over the last two billion years
since the reactor was operating, of \Delta\alpha/\alpha\geq 4.5\times 10^{-8}
(6\sigma confidence). Issues regarding the interpretation of the shifts of the
low energy neutron resonances are discussed.


title: Schwinger tunneling and thermal character of hadron spectra

abstract:
  It is shown that an oscillatory character of the solutions of the
collisionless kinetic equations describing production of the quark-gluon plasma
in strong color fields leads to the exponential (thermal-like)
transverse-momentum spectra of partons produced in the soft region (100 MeV <
pt < 1 GeV). In addition, the production of partons in the very soft region (pt
< 100 MeV) is clearly enhanced above the thermal-like background.


title:
Probing the shell valence structure underlying the B(E2: 0+->2+) for
  N,Z~40: preponderance of the p-n interaction over the sub-shell closures

abstract:
  The very simple product of the number of particles by the number of holes
appearing in the expression of the reduced B(E2:0+->2+) transition probability
of even-even nuclei obtained from the extension of the seniority scheme is used
to analyze the experimental B(E2:0+->2+) values in the Cr up to Se isotopes. A
new interpretation is given to the B(E2:0+->2+) measured in 68Ni and 70Zn. The
B(E2:0+->2+) features of the even-even nuclei between Ni and Se with neutron
number ranging from 28 up to 50 fit in with a global scenario involving p-n
interaction. The evolution of the B(E2:0+->2+) curves presenting very large
values is amazingly reproduced by very schematic binomial calculations.


title: Reinterpretation of Faddeev-Niemi Knot in Skyrme Theory

abstract:
  We identify the Faddeev-Niemi knot in Skyrme theory as a vortex ring made of
a helical baby skyrmion (a twisted chromomagnetic vortex which is periodic in
$z$-coodinate) with the periodic ends connected together. This allows us to
interpret the knot as two quantized magnetic flux rings linked together, the
first one winding the second $m$ times and the second one winding the first $n$
times, whose linking number $mn$ is fixed by the Chern-Simon index of the
magnetic potential. This interpretation strongly suggests that the Skyrme
theory could also describe a very interesting low energy physics in a
completely different environment, which puts the theory in a totally new
perspective.


title: Neck fragmentation reaction mechanism

abstract:
  Based on a microscopic transport model, we study the origin of nonstatistical
Intermediate Mass Fragment ($IMF$) production in semicentral heavy ion
collisions at the Fermi energies. We show that a fast, dynamical $IMF$
formation process, the {\it neck fragmentation mechanism}, can explain the
experimentally observed features: deviations from Viola systematics and
anisotropic, narrow angular distributions. It may be regarded as the
continuation of the multifragmentation mechanism towards intermediate impact
parameters. Its relation to other dynamical mechanisms, the induced fission and
the abrasion of the spectator zones, that can also contribute to mid-rapidity
$IMF$ production, is discussed. The dependence on beam energy and centrality of
the collision is carefully analysed. The competition between volume and surface
instabilities makes this mechanism very sensitive to the in-medium
nucleon-nucleon interactions, from the cross sections for hard collisions to
the compressibility and other Equation of State ($EOS$) properties.
  For charge asymmetric collisions the sensitivity of various observables to
the symmetry energy is investigated. Of particular interest appears the isospin
diffusion dynamics with no signal of isospin equilibration. However, in spite
of the short time scales and of the dynamical aspects, we notice isoscaling
features of the neck mechanism. We observe that isospin enrichement of the neck
zone as well as the isoscaling parameters are sensitive to the density
dependence of asymmetry term of EOS around and below saturation value.


title: Atomic Nucleus as a Laboratory for Fundamental Processes

abstract:
  Concluding remarks about the scientific contents of the XXVIII Mazurian Lakes
Conference on Physics are presented.


title:
Polarization Observables in Hard Rescattering Mechanism of Deuteron
  Photodisintegration

abstract:
  Polarization properties of high energy photodisintegration of the deuteron
are studied within the framework of the hard rescattering mechanism~(HRM). In
HRM, a quark of one nucleon knocked-out by the incoming photon rescatters with
a quark of the other nucleon leading to the production of two nucleons with
high relative momentum. Summation of all relevant quark rescattering amplitudes
allows us to express the scattering amplitude of the reaction through the
convolution of a hard photon-quark interaction vertex, the large angle p-n
scattering amplitude and the low momentum deuteron wave function. Within HRM,
it is demonstrated that the polarization observables in hard
photodisintegration of the deuteron can be expressed through the five helicity
amplitudes of NN scattering at high momentum transfer. At 90$^\circ$ CM
scattering HRM predicts the dominance of the isovector channel of hard $pn$
rescattering, and it explains the observed smallness of induced, $P_y$ and
transfered, $C_x$ polarizations without invoking the argument of helicity
conservation. Namely, HRM predicts that $P_y$ and $C_x$ are proportional to the
$\phi_5$ helicity amplitude which vanishes at $\theta_{cm}=90^\circ$ due to
symmetry reasons. HRM predicts also a nonzero value for $C_z$ in the
helicity-conserving regime and a positive $\Sigma$ asymmetry which is related
to the dominance of the isovector channel in the hard reinteraction. We extend
our calculations to the region where large polarization effects are observed in
$pp$ scattering as well as give predictions for angular dependences.


title:
Causal Theories of Dissipative Relativistic Fluid Dynamics for Nuclear
  Collisions

abstract:
  Non-equilibrium fluid dynamics derived from the extended irreversible
thermodynamics of the causal M\"uller--Israel--Stewart theory of dissipative
processes in relativistic fluids based on Grad's moment method is applied to
the study of the dynamics of hot matter produced in ultra--relativistic heavy
ion collisions. The temperature, energy density and entropy evolution are
investigated in the framework of the Bjorken boost--invariant scaling limit.
The results of these second order theories are compared to those of first order
theories due to Eckart and to Landau and Lifshitz and those of zeroth order
(perfect fluid) due to Euler. In the presence of dissipation perfect fluid
dynamics is no longer valid in describing the evolution of the matter. First
order theories fail in the early stages of evolution. Second order theories
give a better description in good agreement with transport models. It is shown
in which region the Navier--Stokes--Fourier laws (first order theories) are a
reasonable limiting case of the more general extended thermodynamics (second
order theories).


title: Shear Viscosity Coefficient from Microscopic Models

abstract:
  The transport coefficient of shear viscosity is studied for a hadron matter
through microscopic transport model, the Ultra--relativistic Quantum Molecular
Dynamics (UrQMD), using the Green--Kubo formulas. Molecular--dynamical
simulations are performed for a system of light mesons in a box with periodic
boundary conditions. Starting from an initial state composed of $\pi, \eta
,\omega ,\rho ,\phi$ with a uniform phase--space distribution, the evolution
takes place through elastic collisions, production and annihilation. The system
approaches a stationary state of mesons and their resonances, which is
characterized by common temperature. After equilibration, thermodynamic
quantities such as the energy density, particle density, and pressure are
calculated. From such an equilibrated state the shear viscosity coefficient is
calculated from the fluctuations of stress tensor around equilibrium using
Green--Kubo relations. We do our simulations here at zero net baryon density so
that the equilibration times depend on the energy density. We do not include
hadron strings as degrees of freedom so as to maintain detailed balance. Hence
we do not get the saturation of temperature but this leads to longer
equilibration times.


title: Hadron formation in electron induced reactions at HERMES energies

abstract:
  We investigate meson electroproduction off complex nuclei in the kinematic
regime of the HERMES experiment using a semi-classical transport model which is
based on the Boltzmann-Uehling-Uhlenbeck (BUU) equation. We discuss coherence
length and color transparency effects in exclusive rho^0 production as well as
hadron formation and attenuation of charged pions, kaons, protons and
anti-protons in deep inelastic lepton scattering off nuclei.


title:
New Glance at the Experimental Data for Low Lying Collective Excited
  States

abstract:
  Recently the classification of low-lying excited 0+ states in even even
deformed nuclei has been done. The available experimental data were represented
as the energies parabolic distributed by number of monopole excitations. With
other words each 0+ state now is determined as the collective state with the
corresponding number of monopole type phonons n . In this paper we discuss
whether the experimental data for low-lying excited states possessing not equal
to zero spins can also be described with parabolic distribution function
depending on integer classification parameter and find any vindication of the
connection between this integer parameter and the number of collective
excitations building the corresponding state.


title: Phenomenology of pp->pp eta reaction close to threshold

abstract:
  The recent high statistics measurement of the pp -> pp eta reaction at an
excess energy Q=15.5 MeV has been analysed by means of partial wave
decomposition of the cross section. Guided by the dominance of the final state
1S0 pp interaction (FSI), we keep only terms involving the FSI enhancement
factor. The measured p-p and p-eta effective mass spectra can be well
reproduced by lifting the standard on-shell approximation in the enhancement
factor and by allowing for a linear energy dependence in the leading 3P0->1S0,s
partial wave amplitude. Higher partial waves seem to play only a marginal role.


title:
Description of single and double analog states in the f7/2 shell: The Ti
  isotopes

abstract:
  The excitation energies of single analog states in even-odd Ti isotopes and
double analog states in even-even Ti isotopes are microscopically described in
a single j-shell formalism. A projection procedure for generalized BCS states
has been used. As an alternative description a particle-core formalism is
presented. The latter picture provides a two-parameter expression for
excitation energies, which describes fairly well the data in four odd and three
even isotopes of Ti.


title:
Single-spin asymmetries of $d(\gamma,\pi)NN$ in the first resonance
  region

abstract:
  Incoherent photoproduction of pions on the deuteron in the first resonance
region is investigated with special emphasis on single-spin asymmetries. For
the elementary pion production operator an effective Lagrangian model which
includes the standard pseudovector Born terms and a resonance contribution from
the $\Delta$(1232)-excitation is used. Single-spin asymmetries, both for
charged and neutral pion photoproduction on the deuteron, are analyzed and
calculated for the first time in the first resonance region. The linear photon
asymmetry $\Sigma$, vector target asymmetry $T_{11}$ and tensor target
asymmetries $T_{20}$, $T_{21}$, and $T_{22}$ for the reaction $d(\gamma,\pi)NN$
are predicted for forthcoming experiments.


title:
Kaonic nuclei studied based on a new framework of Antisymmetric
  Molecular Dynamics

abstract:
  We have developed a new framework of Antisymmetrized Molecular Dynamics
(AMD), to adequately treat the I=0 \={K}N interaction, which is essential to
study kaonic nuclei. The improved points are 1) pK$^-$/n\={K}$^0$ mixing and 2)
total spin and isospin projections. These improvements enable us to investigate
various kaonic nuclei (ppnK$^-$, pppK$^-$, pppnK$^-$, $^6$BeK$^-$ and
$^9$BK$^-$) systematically. We have found that they are deeply bound and
extremely dense with a variety of shapes.


title: Isoscaling bearing information on the nuclear caloric curve

abstract:
  We show that the qualitative behavior of the nuclear caloric curve can be
inferred from the energy dependence of the isoscaling parameters. Since there
are strong indications that the latter are not distorted by the secondary decay
of primary hot fragments, in contrast to other observables, this suggests that
valuable information on the nuclear caloric curve may be obtained through the
analysis presented in this work.


title:
The Energy-Weighted and Non Energy-Weighted Gamow-Teller Sum Rules in
  Relativistic Random Phase Approximation

abstract:
  The non energy-weighted Gamow-Teller(GT) sum rule is satisfied in
relativistic models, when all nuclear density-dependent terms, including Pauli
blocking terms from nucleon-antinucleon excitations, are taken into account in
the RPA correlation function. The no-sea approximation is equivalent to this
approximation for the giant GT resonance state and satisfies the sum rule, but
each of the total $\beta_-$ and $\beta_+$ strengths is different in the two
approximations. It is also shown that the energy-weighted sum of the GT
strengths for the $\beta_-$ and $\beta_+$ transitions in RPA is equal to the
expectation value of the double commutator of the nuclear Hamiltonian with the
GT operator, when the expectation value is calculated with the ground state in
the mean field approximation. Since the present RPA neglects renormalization of
the divergence, however, the energy-weighted strengths outside of the giant GT
resonance region become negative. These facts are shown by calculating in an
analytic way the GT strengths of nuclear matter.


title:
Precise method for the determination of the neutron electric form factor
  based on a relativistic analysis of the process $d(e,e'n)p

abstract:
  We generalize the recoil polarization method for the determination of the
proton form factor to the case of the disintegration of vector polarized
deuterons by longitudinally polarized electrons, $\vec d(\vec e, e'n)p$. We
suggest to measure for this reaction, in the kinematics of quasi-elastic
$en$-scattering, the ratio $R_{xz}=A_x/A_z$ of the asymmetries induced by the
$x$- and $z$-components of the deuteron vector polarization. In the framework
of the relativistic impulse approximation the ratio $R_{xz}$ is sensitive to
$G_{En}$ in a wide interval of momentum transfer squared, whereas it depends
weakly on the details of the $np$-interaction and on the choice of the deuteron
wave function. Moreover, in the range $0.5\le Q^2\le$1.5 GeV$^2$, the ratio
$R_{xz}$ shows a smooth dependence on $Q^2$, making the analysis simpler.


title: N-d scattering including electromagnetic forces

abstract:
  The electromagnetic potential consisting in the Coulomb plus the magnetic
moment interactions between two nucleons is studied in nucleon-deuteron
scattering. For states in which the relative N-d angular momentum L has low
values the three--nucleon problem has been solved using the correlated
hyperspherical harmonic expansion basis. For states in which the angular
momentum L has large values, explicit formulae for the nucleon-deuteron
magnetic moment interaction are derived and used to calculate the corresponding
T-matrices in Born approximation. Then, the transition matrices describing N-d
elastic scattering have been derived including an infinite number of partial
waves as required by the 1/r^3 behavior of the magnetic moment interaction.
Appreciable effects are observed in the vector analyzing powers at low
energies. The evolution of these effects by increasing the collision energy is
examined.


title:
Description of the Ground and Octupole Bands in the Symplectic Extension
  of the Interacting Vector Boson Model

abstract:
  In the framework of the symplectic extension of the
  Interacting Vector Boson Model (IVBM) a good description of the first excited
positive and negative parity bands of the nuclei in the rare earth and the
actinide region is achieved. The bands investigated in the model are extended
to very high angular momenta as a result of their consideration as "yrast"
bands with respect to the symplectic classification of the basis states. The
analysis of the eigenvalues of the model Hamiltonian reveals the presence of an
interaction between these bands. Due to this iteraction the Delta(L)=1
staggering effect between the energies of the states of two bands is also
reproduced including the "beat" patterns.


title: Simulating the scalar glueball on the lattice

abstract:
  Techniques for efficient computation of the scalar glueball mass on the
lattice are described. Directions and physics goals of proposed future
calculations will be outlined.


title: Three-dimensional rotation of even-even triaxial nuclei

abstract:
  With the self-consistent three-dimensional cranked Hartree-Fock-Bogoliubov
(3d-cranked HFB) method, various types of rotational motion near the yrast line
are investigated in an even-even nucleus in the $A\simeq 130$ mass region
($^{134}_{58}$Ce$_{76}$). The possibilities of chiral rotations,
tilted-rotations, and dynamical aspects of these rotations are discussed
through the analysis of the 3d-cranked HFB solutions. Although a stable planar
solution of the chiral rotation is obtained, an aplanar chiral configuration is
found to be unstable when triaxial deformation is treated self-consistently.


title: Limiting fragmentation and $\phi$ meson production at RHIC

abstract:
  The PHOBOS's limiting fragmentation etc. three empirical scaling rules for
charged multiplicity in $Au+Au$ collisions at RHIC are investigated by a hadron
and string cascade model LUCIAE. Similar studies are performed for the $\phi$
meson exploring its production mechanism via comparing with the charged
multiplicity. The LUCIAE results for charged multiplicity are compatible with
PHOBOS observations. However, for the $\phi$ meson the three empirical scaling
rules are either kept only or kept better in the LUCIAE calculations without
reduction mechanism of the $s$ quark suppression extra introduced for the
strangeness in LUCIAE model. These results seem indicating a universal
production mechanism for charged particle and $\phi$ meson in string
fragmentation regime. It is discussed that the PHOBOS's empirical scaling rules
are model dependent indeed.


title: Nuclear Structure, Random Interactions and Mesoscopic Physics

abstract:
  Standard concepts of nuclear physics explaining the systematics of ground
state spins in nuclei by the presence of specific coherent terms in the
nucleon-nucleon interaction were put in doubt by the observation that these
systematics can be reproduced with high probability by randomly chosen
rotationally invariant interactions. We review the recent development in this
area, along with new original results of the authors. The self-organizing role
of geometry in a finite mesoscopic system explains the main observed features
in terms of the created mean field and correlations that are considered in
analogy to the random phase approximation.


title:
Neutrino Bremsstrahlung in Neutron Matter from Effective Nuclear
  Interactions

abstract:
  We revisit the emissivity from neutrino pair bremsstrahlung in
neutron-neutron scattering, nn -> nn nu nubar, which was calculated from the
one-pion exchange potential including correlation effects by Friman and
Maxwell. Starting from the free-space low-momentum nucleon-nucleon interaction
V_{low k}, we include tensor, spin-orbit and second-order medium-induced
non-central contributions to the scattering amplitude in neutron matter. We
find that the screening of the nucleon-nucleon interaction reduces the
emissivity from neutrino bremsstrahlung for densities below nuclear matter
density. We discuss the implications of medium modifications for the cooling of
neutron stars via neutrino emission, taking into account recent results for the
polarization effects on neutron superfluidity.


title: Non Trivial Effects in Heavy Nuclear Systems due to Charge Rearrangement

abstract:
  In this report we propose that a charge rearrangement within heavy ions may
occur during fusion reactions, lowering the Coulomb barrier as the nuclear
systems approach each other. In this situation a modified Gamow factor has been
calculated, which emphasizes the importance of spatial degrees of freedom in
nuclear matter.


title:
New effective nuclear forces with a finite-range three-body term and
  their application to AMD+GCM calculations

abstract:
  We propose new effective inter-nucleon forces with a finite-range three-body
operator. The proposed forces are suitable for describing the nuclear structure
properties over a wide mass number region, including the saturation point of
nuclear matter. The forces are applied to microscopic calculations of $Z=N$
($A\le 40$) nuclei and O isotopes with a method of antisymmetrized molecular
dynamics. We present the characteristics of the forces and discuss the
importance of the finite-range three-body term.


title:
Description of \eta-distributions at RHIC energies in terms of a
  stochastic model

abstract:
  To explain \eta-distributions at RHIC energies we consider the
Ornstein-Uhlenbeck process. To account for hadrons produced in the central
region, we assume existence of third source located there (y \approx 0) in
addition to two sources located at the beam and target rapidities (\pm y_{max}
= \pm \ln[\sqrt{s_{NN}}/m_{N}]). This results in better \chi^2/n.d.f. than
those for only two sources when analysing data.


title:
Charm- and Bottom- Baryons: A Variational Approach Using Heavy Quark
  Symmetry

abstract:
  We evaluate masses of bottom and charmed baryons using several
non-relativistic quark potentials which parameters have been adjusted to the
meson spectra. Heavy Quark Symmetry leads to important simplifications of the
three body problem, which turns out to be easily solved by a simple variational
ansatz. The wave functions obtained can be readily used to compute further
observables as mass densities or form factors. The quark-quark potentials
explored so far, show an overall good agreement with the experimental masses.


title: Universal Transition Curve in Pseudo-Rapidity Distribution

abstract:
  We show that an unambiguous way of determining the universal limiting
fragmentation region is to consider the derivative ($d^2n/d\eta^2$) of the
pseudo-rapidity distribution per participant pair.
  In addition, we find that the transition region between the fragmentation and
the central plateau regions exhibits a second kind of universal behavior that
is only apparent in $d^2n/d\eta^2$.
  The $\sqrts$ dependence of the height of the central plateau
$(dn/d\eta)_{\eta=0}$ and the total charged particle multiplicity $n_{\rm
total}$ critically depend on the behavior of this universal transition curve.
  Analyzing available RHIC data, we show that $(dn/d\eta)_{\eta=0}$ can be
bounded by $\ln^2 s$ and $n_{\rm total}$ can be bounded by $\ln^3 s$.
  We also show that the deuteron-gold data from RHIC has the exactly same
features as the gold-gold data indicating that these universal behaviors are a
feature of the initial state parton-nucleus interactions and not a consequence
of final state interactions.
  Predictions for LHC energy are also given.


title:
Disoriented Chiral Condensate and Charge-Neutral Particle Fluctuations
  in Heavy Ion Collisions

abstract:
  The posibility of large charge and isospin fluctuations in high-energy heavy
ion-collisions is studied within the framework of the nonlinear $\sigma $-model
with quark degrees of freedom. The multipion exchange potential between two
quarks is derived. It is shown that the soft chiral pion bremsstralung leads to
anomalously large fluctuations in the ratio of neutral to charged pions,
predicted by the formation of a disoriented chiral condensate (DCC). The
factorization property of the scattering amplitude in the impact parameter
space of the leading two-nucleon system is used to study semiclassical
production of pions in the central region. We show that the DCC-type
fluctuations are suppressed if a large number of pions are produced in $\rho
$-type clusters. Our conclusion is supported through the calculation of two
pion correlation parameters as a function of the $\rho $-to-$\pi $ ratio.


title: Pairing correlations and transitions in nuclear systems

abstract:
  We discuss several pairing-related phenomena in nuclear systems, ranging from
superfluidity in neutron stars to the gradual breaking of pairs in finite
nuclei. We describe recent experimental evidence that points to a relation
between pairing and phase transitions (or transformations) in finite nuclear
systems. A simple pairing interaction model is used in order to study and
classify an eventual pairing phase transition in finite fermionic systems such
as nuclei. We show that systems with as few as 10-16 fermions can exhibit clear
features reminiscent of a phase transition.


title: Is a neutron halo nothing but a large neutron skin?

abstract:
  We discuss the difference between neutron halos and neutron skins matching to
our usual thinking of a skin as being connected to a body whereas a halo is, in
some sense, disconnected from the body. We emphasize that the existence of one
or more neutrons behaving incoherently with respect to the rest of the nucleons
in a nucleus can match the picture of a neutron halo.


title:
Hartree-Fock-Bogoliubov Calculations in Coordinate Space: Neutron-Rich
  Sulfur, Zirconium, Cerium, and Samarium Isotopes

abstract:
  Using the Hartree-Fock-Bogoliubov (HFB) mean field theory in coordinate
space, we investigate ground state properties of the sulfur isotopes from the
line of stability up to the two-neutron dripline ($^{34-52}S$). In particular,
we calculate two-neutron separation energies, quadrupole moments, and rms-radii
for protons and neutrons. Evidence for shape coexistence is found in the very
neutron-rich sulfur isotopes. We compare our calculations with results from
relativistic mean field theory and with available experimental data. We also
study the properties of neutron-rich zirconium ($^{102,104}Zr$), cerium
($^{152}Ce$), and samarium ($^{158,160}Sm$) isotopes which exhibit very large
prolate quadrupole deformations.


title: Instability of nuclear wobbling motion and tilted axis rotation

abstract:
  We study a possible correspondence between the softening of the wobbling mode
and the "phase transition" of the one-dimensionally rotating mean field to a
three-dimensionally rotating one by comparing the properties of the wobbling
mode obtained by the one-dimensional cranking model + random phase
approximation with the total routhian surface obtained by the three-dimensional
tilted-axis cranking model. The potential surface for the observed wobbling
mode excited on the triaxial superdeformed states in $^{163}$Lu is also
analyzed.


title: P and T odd nuclear moments

abstract:
  We discuss the nuclear anapole moment, a new P odd, T even electromagnetic
multipole. Its discovery in the cesium experiment gives a first-rate
information on parity-nonconserving nuclear forces. New prospects in the field
are considered. Upper limits on the electric dipole moments, which are P odd, T
odd multipoles, of elementary particles and atoms are presented, and their
physical implications discussed. The atomic experiments are demonstrated to be
as informative in this respect as the neutron ones. Tremendous progress in the
field can be expected from experiments at ion storage rings and linear
electrostatic traps.


title:
Influence of the nucleon spectral function in photon and electron
  induced reactions on nuclei

abstract:
  We study the influence of the nucleon spectral function on eta photo- and
electroproduction on nuclei. Besides kinematical effects due to groundstate
correlations, also a modification of the S11(1535) decay width is taken into
account, which is caused by the possible decay into nucleons with mass smaller
than the pole mass in the medium. Hence, resonances with masses below the free
N eta threshold can contribute to eta production.


title: Hadronic Spectral Functions in Nuclear Matter

abstract:
  We study the in-medium properties of mesons $(\pi,\eta,\rho)$ and baryon
resonances in cold nuclear matter within a coupled-channel analysis. The meson
self energies are generated by particle-hole excitations. Thus multi-peak
spectra are obtained for the mesonic spectral functions. In turn this leads to
medium-modifications of the baryon resonances. Special care is taken to respect
the analyticity of the spectral functions and to take into account effects from
short-range correlations both for positive and negative parity states. Our
model produces sensible results for pion and $\Delta$ dynamics in nuclear
matter. We find a strong interplay of the $\rho$ meson and the $D_{13}(1520)$,
which moves spectral strength of the $\rho$ spectrum to smaller invariant
masses and leads to a broadening of the baryon resonance. The optical potential
for the $\eta$ meson resulting from our model is rather attractive whereas the
in-medium properties modifications of the $S_{11}(1535)$ are found to be quite
small.


title:
Realistic calculations of correlations and final state interaction
  effects in the A(e,e'p)X process off complex nuclei

abstract:
  A linked cluster expansion for the calculation of ground state observables of
complex nuclei with realistic interactions has been used to calculate the
ground state energy, density and momentum distribution of 16O and 40Ca. Using
the same cluster expansion and the wave function and correlation parameters
obtained from the energy calculation, we have evaluated the semi inclusive
reaction A(e,e'p)X taking final state interaction (FSI) into account by a
Glauber type approach; the comparison between the distorted and undistorted
momentum distributions provides an estimate of the transparency of the nuclear
medium to the propagation of the hit proton. The effect of color transparency
is also included by considering the Finite Formation Time (FFT) that the hit
hadron needs to reach its asymptotic physical state.


title: Complex Energy Method in 4-Body Faddeev-Yakubovsky Equations

abstract:
  The Complex Energy Method [Prog. Theor. Phys. {\bf 109}, 869L (2003)] is
applied to the 4-body Faddeev-Yakubovsky equations in the 4-nucleon system. We
obtain a well converged solution in all energy regions below and above the
4-nucleon break-up threshold.


title: Medium Effects of Low Energy Pions

abstract:
  Fits of pion-nucleus potentials to large sets of pionic atom data reveal
departures of parameter values from the corresponding free $\pi N$ parameters.
These medium effects can be quantitatively reproduced by a chiral-motivated
model where the pion decay constant is modified in the medium or by including
the empirical on-shell energy dependence of the amplitudes. No consistency is
obtained between pionic atoms and the free $\pi N$ interaction when an extreme
off-shell chiral model is used. The role of the size of data sets is briefly
discussed.


title:
Hadron Multiplicity in Semi-Inclusive Lepton-Nucleon and Lepton-Nucleus
  Scattering

abstract:
  We discuss multi-hadron production in both inelastic neutrino-nucleon
interactions in the current fragmentation region and neutrino-nucleus
collisions in the target fragmentation region. Our analysis, carried out within
the framework of the quark-gluon string model, is mainly focused on the
difference between these two processes. We show that the $Q^2$ dependence of
hadron multiplicity in the current and target fragmentation regions is indeed
completely different. The study of inelastic $\nu-A$ scattering in the target
fragmentation region also provides new information on nuclear structure at
small $N-N$ distances. The results of the proposed approach are in satisfactory
agreement with the data recently obtained at CERN by the NOMAD Collaboration.


title:
A nucleonic NJL model for finite nuclei: dynamic mass generation and
  ground-state observables

abstract:
  We test the compatibility of chiral symmetry, dynamic mass generation of the
nucleon due to spontaneous breaking of chiral symmetry, and the description of
finite nuclear systems by employing an NJL model understood as a chiral
invariant effective theory for nucleons. We apply the model to nuclear matter
as well as to finite nuclei. In the latter case, the model is adjusted to
nuclear ground-state observables. We treat the case of a pure chiral theory and
the physically more realistic case where a portion of the nucleon mass (160
MeV) explicitly breaks chiral symmetry. The best version of this current model
is found to deliver reasonably good results simultaneously for both finite
nuclei and the nucleon mass, which supports our motivation of probing a link
between low-momentum QCD and the nuclear many-body problem. However, the
observables calculated for finite nuclei are not as good as those coming from
existing relativistic mean field models without explicit chiral symmetry.


title:
Local Density Approximation for proton-neutron pairing correlations. I.
  Formalism

abstract:
  In the present study we generalize the self-consistent
Hartree-Fock-Bogoliubov (HFB) theory formulated in the coordinate space to the
case which incorporates an arbitrary mixing between protons and neutrons in the
particle-hole (p-h) and particle-particle (p-p or pairing) channels. We define
the HFB density matrices, discuss their spin-isospin structure, and construct
the most general energy density functional that is quadratic in local
densities. The consequences of the local gauge invariance are discussed and the
particular case of the Skyrme energy density functional is studied. By varying
the total energy with respect to the density matrices the self-consistent
one-body HFB Hamiltonian is obtained and the structure of the resulting mean
fields is shown. The consequences of the time-reversal symmetry, charge
invariance, and proton-neutron symmetry are summarized. The complete list of
expressions required to calculate total energy is presented.


title:
Quark Condensates in Nuclear Matter in the Global Color Symmetry Model
  of QCD

abstract:
  With the global color symmetry model being extended to finite chemical
potential, we study the density dependence of the local and nonlocal scalar
quark condensates in nuclear matter. The calculated results indicate that the
quark condensates increase smoothly with the increasing of nuclear matter
density before the critical value (about 12$\rho_0$) is reached. It also
manifests that the chiral symmetry is restored suddenly as the density of
nuclear matter reaches its critical value. Meanwhile, the nonlocal quark
condensate in nuclear matter changes nonmonotonously against the space-time
distance among the quarks.


title: Warm Asymmetric Nuclear Matter and Proto-Neutron Star

abstract:
  Asymmetric nuclear matter equation of state at finite temperature is studied
in SU(2) chiral sigma model using mean field approximation. The effect of
temperature on effective mass, entropy, and binding energy is discussed.
Treating the system as one with two conserved charges the liquid-gas phase
transition is investigated. We have also discussed the effect of proton
fraction on critical temperature with and without $\rho$-meson contribution. We
have extended our work to study the structure of proto-neutron star with
neutron free charge-neutral matter in beta-equilibrium. We found that the mass
and radius of the star decreases as it cools from the entropy per baryon S = 2
to S = 0 and the maximum temperature of the core of the star is about 62 MeV
for S = 2.


title: Short- and long-distance QCD effects in B-meson decays

abstract:
  Various exclusive and inclusive decays of B mesons are studied, at present,
with dedicated experiments at ``B factories''. In order to compete with the
experimental accuracy, we need a reliable theoretical framework to compute
strong interaction effects in a hadronic environment. I discuss how the
separation of (perturbatively calculable) short-distance QCD effects from
(non-perturbative) long-distance phenomena helps to obtain precise theoretical
predictions.


title: Test of Pseudospin Symmetry in Deformed Nuclei

abstract:
  Pseudospin symmetry is a relativistic symmetry of the Dirac Hamiltonian with
scalar and vector mean fields equal and opposite in sign. This symmetry imposes
constraints on the Dirac eigenfunctions. We examine extensively the Dirac
eigenfunctions of realistic relativistic mean field calculations of deformed
nuclei to determine if these eigenfunctions satisfy these pseudospin symmetry
constraints.


title: Superheavy nuclei in relativistic effective Lagrangian model

abstract:
  Isotopic and isotonic chains of superheavy nuclei are analyzed to search for
spherical double shell closures beyond Z=82 and N=126 within the new effective
field theory model of Furnstahl, Serot, and Tang for the relativistic nuclear
many-body problem. We take into account several indicators to identify the
occurrence of possible shell closures, such as two-nucleon separation energies,
two-nucleon shell gaps, average pairing gaps, and the shell correction energy.
The effective Lagrangian model predicts N=172 and Z=120 and N=258 and Z=120 as
spherical doubly magic superheavy nuclei, whereas N=184 and Z=114 show some
magic character depending on the parameter set. The magicity of a particular
neutron (proton) number in the analyzed mass region is found to depend on the
number of protons (neutrons) present in the nucleus.


title:
Relativistic $O(q^4)$ two-pion exchange nucleon-nucleon potential:
  configuration space

abstract:
  We have recently performed a relativistic $O(q^4)$ chiral expansion of the
two-pion exchange $NN$ potential, and here we explore its configuration space
content. Interactions are determined by three families of diagrams, two of
which involve just $g_A$ and $f_{\pi}$, whereas the third one depends on
empirical coefficients fixed by subthreshold $\pi N$ data. In this sense, the
calculation has no adjusted parameters and gives rise to predictions, which are
tested against phenomenological potentials. The dynamical structure of the
eight leading non-relativistic components of the interaction is investigated
and, in most cases, found to be clearly dominated by a well defined class of
diagrams. In particular, the central isovector and spin-orbit, spin-spin, and
tensor isoscalar terms are almost completely fixed by just $g_A$ and $f_{\pi}$.
The convergence of the chiral series in powers of the ratio (pion mass/nucleon
mass) is studied as a function of the internucleon distance and, for $r>$ 1 fm,
found to be adequate for most components of the potential. An important
exception is the dominant central isoscalar term, where the convergence is
evident only for $r>$ 2.5 fm. Finally, we compare the spatial behavior of the
functions that enter the relativistic and heavy baryon formulations of the
interaction and find that, in the region of physical interest, they differ by
about 5%.


title:
Is the strong-interaction proton-proton scattering length
  renormalization scale dependent in effective field theory?

abstract:
  It is shown that the strong-interaction ${}^1S_0$ proton-proton scattering
length in very low-energy effective field theory does not depend on the
renormalization scale, if the electromagnetic interaction is "switched off"
consistently.


title: Simplified approach to the application of the geometric collective model

abstract:
  The predictions of the geometric collective model (GCM) for different sets of
Hamiltonian parameter values are related by analytic scaling relations. For the
quartic truncated form of the GCM -- which describes harmonic oscillator,
rotor, deformed gamma-soft, and intermediate transitional structures -- these
relations are applied to reduce the effective number of model parameters from
four to two. Analytic estimates of the dependence of the model predictions upon
these parameters are derived. Numerical predictions over the entire parameter
space are compactly summarized in two-dimensional contour plots. The results
considerably simplify the application of the GCM, allowing the parameters
relevant to a given nucleus to be deduced essentially by inspection. A
precomputed mesh of calculations covering this parameter space and an
associated computer code for extracting observable values are made available
through the Electronic Physics Auxiliary Publication Service. For illustration,
the nucleus 102Pd is considered.


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

abstract:
  The boson-pair coherent state developed in Part (I) is generalized to the
case in which the state is a mixture of even-boson and odd-boson number states.
A general framework is shown and its three concrete examples are discussed.
Main idea is in the application of the deformed boson scheme presented by the
present authors.


title: Possible evidence of extended objects inside the proton

abstract:
  Recent data on the Nachtmann moments of the unpolarized proton structure
function F2p, obtained at low momentum transfer with the CLAS detector at
Jefferson Lab, are interpreted in terms of the dominance of the elastic
coupling of the virtual photon with extended substructures inside the proton.
The CLAS data exhibit a new type of scaling behavior and the resulting scaling
function can be interpreted as a constituent form factor consistent with the
elastic nucleon data. A constituent size of ~ 0.2 - 0.3 fm is obtained.


title: Analysis of anisotropic flow with Lee-Yang zeroes

abstract:
  We present a new method to extract anisotropic flow in heavy ion collisions
from the genuine correlation among a large number of particles. Anisotropic
flow is obtained from the zeroes in the complex plane of a generating function
of azimuthal correlations, in close analogy with the theory of phase
transitions by Lee and Yang. Flow is first estimated globally, i.e., averaged
over the phase space covered by the detector, and then differentially, as a
function of transverse momentum and rapidity for identified particles. The
corresponding estimates are less biased by nonflow correlations than with any
other method. The practical implementation of the method is rather
straightforward. Furthermore, it automatically takes into account most
corrections due to azimuthal anisotropies in the detector acceptance. The main
limitation of the method is statistical errors, which can be significantly
larger than with the ``standard'' method of flow analysis if the flow and/or
the event multiplicities are too small. In practice, we expect this to be the
most accurate method to analyze directed and elliptic flow in fixed-target
heavy-ion collisions between 100 MeV and 10 GeV per nucleon (at the Darmstadt
SIS synchrotron and the Brookhaven Alternating Gradient Synchrotron), and
elliptic flow at ultrarelativistic energies (at the Brookhaven Relativistic
Heavy Ion Collider, and the forthcoming Large Hadron Collider at CERN).


title:
Lagrangians for invariant sub-spaces of the squared Pauli-Lubanski
  vector

abstract:
  We present an alternative formalism to the Rarita-Schwinger framework for the
description of "has-been" higher spins at rest that avoids the Velo-Zwanziger
problem.


title:
Analysis of polarized $^{16}$O$(\vec{e},e'\vec{p})$ observables within
  the relativistic distorted wave impulse approximation

abstract:
  Recoil nucleon transferred polarization observables in coincidence
quasielastic electron scattering are studied within the relativistic distorted
wave impulse approximation. Results for response functions and polarization
asymmetries are discussed for proton knockout from $p_{1/2}$, $p_{3/2}$ and
$s_{1/2}$ shells in $^{16}$O. The impact of spinor distortion is examined by
comparing the fully relativistic calculation with results obtained by
projecting out the negative-energy components. In particular, a careful
analysis of effects linked to the description of the bound and scattered
relativistic nucleon wave functions is presented. The high sensitivity of some
polarization observables to the dynamical enhancement of the lower components,
already shown within the relativistic plane wave impulse approximation, is
proven to be maintained in the relativistic distorted wave approach.
Semi-relativistic approaches based on the effective momentum approximation are
also studied. Finally, comparison with experimental data and a brief analysis
of effects linked to medium modified form factors is presented.


title:
Superheavy element production, nucleus-nucleus potential and
  mu-catalysis

abstract:
  The semi-microscopic potential between heavy nuclei is evaluated for various
colliding ions in the approach of frozen densities in the framework of the
extended Thomas-Fermi approximation with hbar^2 correction terms in the kinetic
energy density functional. The proton and neutron densities of each nucleus are
obtained in the Hartree-Fock-BCS approximation with SkM* parameter set of the
Skyrme force. A simple expression for the nuclear interaction potential between
spherical nuclei is presented. It is shown that muon bound with light
projectile induces the superheavy elements production in nucleus-nucleus
collisions.


title: Giant Resonances from TDHF

abstract:
  A method of calculating giant resonance strength functions using
Time-Dependent Hartree-Fock techniques is described. An application to
isoscalar giant monopole resonances in spherical nuclei is made, thus allowing
a comparison between independent 1-, 2- and 3-Dimensional computer codes.


title: Indication of anomalous exchange in exclusive charmonium photoproduction

abstract:
  We find that available data on $J/\Psi$ photoproduction at $|t|{\ge}$1 GeV
are energy independent over the range $22{\le}\sqrt{s}{\le}170$ GeV and show a
very soft $t$ dependence. Through a systematic analysis of the data we detect a
new trajectory, which manifests itself at threshold and is energy independent.
The trajectory couples to the axial form factor of the nucleon and can
reproduce the $J/\Psi$ exclusive photoproduction data at large -$t$.


title: A model for $J/\psi$ - kaon cross section

abstract:
  We calculate the cross section for the dissociation of $J/\psi$ by kaons
within the framework of a meson exchange model. We find that, depending on the
values of the coupling constants used, the cross section can vary from 5 mb to
30 mb at $\sqrt{s}\sim5$ GeV.


title: Skyrme forces with extended density dependence

abstract:
  A generalized parameterization of the Skyrme effective force is discussed.
Preliminary results are presented for infinite symmetric and asymmetric nuclear
matter. In particular, it is shown that an enlarged density dependence based on
two terms allows to choose independently the incompressibility and the
isoscalar effective mass.


title: A new screening function for Coulomb renormalization

abstract:
  We introduce a new screening function which is useful for the few-body
Coulomb scattering problem in ``screening and renormalization'' scheme. The new
renormalization phase factor of the screening function is analytically shown.
The Yukawa type of the screening potential has been used in several decades, we
modify it to make more useful. As a concrete example, we compare the
proton-proton scattering phase shifts calculated from these potentials. The
numerical results document that high precision calculations of the
renormalization are performed by the new screening function.


title: Strangeness production via electromagnetic probes: 40 years later

abstract:
  A brief review of the associated strangeness electromagnetic production is
presented. Very recent K+ Lambda photoproduction data on the proton from
threshold up to E=2.6 GeV are interpreted within a chiral constituent quark
formalism, which embodies all known nucleonic and hyperonic resonances. The
preliminary results of this work are reported here.


title:
Proton-nucleus elastic scattering and the equation of state of nuclear
  matter

abstract:
  We calculate differential cross sections for proton-nucleus elastic
scattering by using a Glauber theory in the optical limit approximation and
nucleon distributions that can be obtained in the framework of macroscopic
nuclear models in a way dependent on the equation of state of uniform nuclear
matter near the saturation density. We find that the peak angle calculated for
unstable neutron-rich nuclei in the small momentum transfer regime increases as
the parameter L characterizing the density dependence of the symmetry energy
decreases. This is a feature associated with the L dependence of the predicted
matter radii.


title: Energy level displacement of the excited nl state of pionic hydrogen

abstract:
  The energy level displacements of the excited nl states of pionic hydrogen
and the contribution of the ns -> 1s transitions and the (pi^-p)_Coul -> 1s
transitions of the pi^-p pair, coupled by the attractive Coulomb field in the
S-wave state with a continuous energy spectrum, to the shift of the energy
level of the ground state of pionic hydrogen, caused by strong low-energy
interactions, are calculated within a quantum field theoretic, relativistic
covariant and model-independent approach developed in nucl-th/0306047.


title: Solving Three-Cluster OCM Equations in the Faddeev Formalism

abstract:
  Two different types of orthogonality condition models (OCM) are equivalently
formulated in the Faddeev formalism. One is the OCM which uses pairwise
orthogonality conditions for the relative motion of clusters, and the other is
the one which uses the orthogonalizing pseudo-potential method. By constructing
a redundancy-free T-matrix, one can exactly eliminate the redundant components
of the total wave function for the harmonic-oscillator Pauli-forbidden states,
without introducing any limiting procedure. As an example, a
three-alpha-particle model interacting via the deep alpha alpha potential by
Buck, Friedrich and Wheatley is investigated.


title: "Super-radiance" and the width of exotic baryons

abstract:
  It is suggested that the narrow width of the recently observed resonance
$\Theta^{+}(1540)$ with strangeness $S=+1$ could be a result of the
super-radiance mechanism of the redistribution of the widths of overlapping
resonances due to their coupling through common decay channels.


title: Spin-Isospin Resonances and Neutron Skin of Nuclei

abstract:
  The Gamow-Teller resonances (GTR) and isobaric analog states (IAS) of a
sequence of even-even Sn target nuclei are calculated by using the framework of
the relativistic Hartree-Bogoliubov model plus proton-neutron quasiparticle
random-phase approximation. The calculation reproduces the experimental data on
ground-state properties, as well as the excitation energies of the isovector
excitations. It is shown that the isotopic dependence of the energy spacings
between the GTR and IAS provides direct information on the evolution of neutron
skin-thickness along the Sn isotopic chain. A new method is suggested for
determining the difference between the radii of the neutron and proton density
distributions along an isotopic chain, based on measurement of the excitation
energies of the GTR relative to the IAS.


title: Integrability and Quantum Phase Transitions in Interacting Boson Models

abstract:
  The exact solution of the boson pairing hamiltonian given by Richardson in
the sixties is used to study the phenomena of level crossings and quantum phase
transitions in the integrable regions of the sd and sdg interacting boson
models.


title:
Alpha-decay chains of $^{288}_{173}115$ and $^{287}_{172}115$ in the
  Relativistic Mean Field theory

abstract:
  In the recent experiments designed to synthesize the element 115 in the
$^{243}$Am+$^{48}$Ca reaction at Dubna in Russia, three similar decay chains
consisting of five consecutive $\alpha$-decays, and another different decay
chain of four consecutive $\alpha$-decays are detected, and the decay
properties of these synthesized nuclei are claimed to be consistent with
consecutive $\alpha$-decays originating from the parent isotopes of the new
element 115, $^{288}115$ and $^{287}115$, respectively\cite{ogan.03}. Here in
the present work, the recently developed deformed RMF+BCS method with a
density-independent delta-function interaction in the pairing channel is
applied to the analysis of these newly synthesized superheavy nuclei
$^{288}115$, $^{287}115$, and their $\alpha$-decay daughter nuclei. The
calculated $\alpha$-decay energies and half-lives agree well with the
experimental values and with those of the macroscopic-microscopic FRDM+FY and
YPE+WS models. In the mean field Lagrangian, the TMA parameter set is used.
Particular emphasis is paid on the influence to both the ground-state
properties and energy surfaces introduced by different treatments of pairing.
Two different effective interactions in the particle-particle channel, i.e.,
the constant pairing and the density-independent delta-function interaction,
together with the blocking effect are discussed in detail.


title: Nuclear Tetrahedral Symmetry

abstract:
  We recall the main features of the Td (tetrahedral) symmetry in atomic nuclei
and present realistic mean-field calculations supporting the existence such a
symmetry all over the nuclear chart. A few potential candidate-nuclei are
investigated and the possible experimental signatures of the tetrahedral
symmetry are also briefly discussed.


title: Final state interaction in the reaction NN -> eta NN

abstract:
  The production of $\eta$ mesons in $NN$ collisions in the near threshold
region is analyzed with special emphasis on the role of final state interaction
which is calculated using three-body scattering theory. The three-body aspects
are shown to be very important in interpreting experimental results for the
total cross section of $pp\to\eta pp$. Furthermore, energy spectra and angular
distributions of the emitted particles are calculated and compared to
experimental data.


title:
Nonequilibrium chiral dynamics by the time dependent variational
  approach with squeezed states

abstract:
  We investigate the inhomogeneous chiral dynamics of the O(4) linear sigma
model in 1+1 dimensions using the time dependent variational approach in the
space spanned by the squeezed states. We compare two cases, with and without
the Gaussian approximation for the Green's functions. We show that mode-mode
correlation plays a decisive role in the out-of-equilibrium quantum dynamics of
domain formation and squeezing of states.


title:
Phase-space densities and effects of resonance decays in hydrodynamic
  approach to heavy ion collisions

abstract:
  A method allowing analysis of the overpopulation of phase-space in heavy ion
collisions in a model independent way is proposed within the hydrodynamic
approach. It makes it possible to extract a chemical potential of thermal pions
at freeze out irrespective of the form of freeze-out (isothermal) hypersurface
in Minkowski space and transverse flows on it. The contributions of resonance
(with masses up to 2 GeV) decays to spectra, interferometry volumes and
phase-space densities are calculated and discussed in detail. The estimates of
average phase-space densities and chemical potentials of thermal pions are
obtained for SPS and RHIC energies. They demonstrate that multibosonic
phenomena at those energies might be considered as a correction factor rather
than as a significant physical effect. The analysis of the evolution of the
pion average phase-space density in chemically frozen hadron systems shows that
it is almost constant or slightly increases with time while the particle
density and phase-space density at each space point drops down rapidly during
the system's expansion. We found that, unlike the particle density, the average
phase-space density has no direct link to the freeze-out criterion and final
thermodynamic parameters, being connected rather to the initial phase-space
density of hadronic matter formed in relativistic nucleus-nucleus collisions.


title: Application of the generalized two-center cluster model to 10Be

abstract:
  A generalized two-center cluster model (GTCM), including various partitions
of the valence nucleons around two alpha-cores, is proposed for studies on the
exotic cluster structures of Be isotopes. This model is applied to the 10Be =
alpha + alpha + n + n system and the adiabatic energy surfaces for alpha-alpha
distances are calculated. It is found that this model naturally describes the
formation of the molecular orbitals as well as that of asymptotic cluster
states dependeing on their relative distance. In the negative-parity state, a
new type of the alpha + 6He cluster structure is also predicted.


title: Polarization observables in $\pi$-photoproduction on the deuteron

abstract:
  A general analysis of polarization observables for the $d(\gamma,\pi)NN$
reaction with polarized photons and/or oriented deuterons is presented. The
unpolarized differential cross section, linear photon asymmetry, vector and
tensor target asymmetries are predicted for forthcoming experiments.


title: Meson loop effects on the pion electromagnetic form factor

abstract:
  In this work we calculate the meson loop effects on the pion electromagnetic
form factor and perform a comparison with experimental data. We show that, even
though the meson cloud is not the only nonperturbative process to be
considered, its contribution is significant.


title:
Buda-Lund hydro model for ellipsoidally symmetric fireballs and the
  elliptic flow at RHIC

abstract:
  The ellipsoidally symmetric extension of Buda-Lund hydrodynamic model is
shown here to yield a natural description of the pseudorapidity dependence of
the elliptic flow $v_2(\eta)$, as determined recently by the PHOBOS experiment
for Au+Au collisions at $\sqrt{s_{NN}} = 130$ and 200 GeV. With the same set of
parameters, the Buda-Lund model describes also the transverse momentum
dependence of $v_2$ of identified particles at mid-rapidity. The results
confirm the indication for quark deconfinement in Au+Au collisions at RHIC,
obtained from a successful Buda-Lund hydro model fit to the single particle
spectra and two-particle correlation data, as measured by the BRAHMS, PHOBOS,
PHENIX and STAR collaborations.


title: Electroproduction of nucleon resonances

abstract:
  The unitary isobar model MAID has been extended and used for a partial wave
analysis of pion photo- and electroproduction in the resonance region W < 2
GeV. Older data from the world data base and more recent experimental results
from Mainz, Bates, Bonn and JLab for Q^2 up to 4.0 (GeV/c)^2 have been analyzed
and the Q^2 dependence of the helicity amplitudes have been extracted for a
series of four star resonances. We compare single-Q^2 analyses with a
superglobal fit in a new parametrization of Maid2003 together with predictions
of the hypercentral constituent quark model. As a result we find that the
helicity amplitudes and transition form factors of constituent quark models
should be compared with the analysis of bare resonances, where the pion cloud
contributions have been subtracted.


title: Bose-Einstein correlations for Levy stable source distributions

abstract:
  The peak of the two-particle Bose-Einstein correlation functions has a very
interesting structure. It is often believed to have a multivariate Gaussian
form. We show here that for the class of stable distributions, characterized by
the index of stability $0 < \alpha \le 2$, the peak has a stretched exponential
shape. The Gaussian form corresponds then to the special case of $\alpha = 2$.
We give examples for the Bose-Einstein correlation functions for univariate as
well as multivariate stable distributions, and check the model against
two-particle correlation data.


title: Zemach Moments for Hydrogen and Deuterium

abstract:
  We determine the Zemach moments of hydrogen and deuterium for the first time
using only the world data on elastic electron-proton and electron-deuteron
scattering. Such moments are required for the calculation of the nuclear
corrections to the hyperfine structure of these hydrogenic atoms. We compare
the resulting HFS predictions to the available high-precision data and provide
an estimate of the size of the nuclear polarization corrections necessary to
produce agreement between experimental HFS and theoretical calculations.


title: Medium induced jet absorption at relativistic heavy ion collisions

abstract:
  The dense medium created in Au + Au collisions at the Relativistic Heavy-Ion
Collider (RHIC) significantly suppresses particle production from hard
scattering processes and their characteristic back-to-back angular correlation.
We present a simple model of jet absorption in dense matter which incorporates
a realistic nuclear geometry. Our calculations are performed at the jet level
and assume independent jet fragmentation in the vacuum. This model describes
quantitatively the centrality dependence of the observed suppression of the
high $p_T$ hadron yield and of the back-to-back angular correlations. The
azimuthal anisotropy of high $p_T$ particle production can not be accounted for
using a realistic nuclear geometry.


title: Phi meson production in near threshold proton-nucleus collisions

abstract:
  The cross section for production of Phi mesons in proton-nucleus reactions is
calculated as a function of the target mass. The decay width of the Phi meson
is affected by the change of the masses of the Phi, K+ and K- mesons in the
medium. A strong attractive K- potential leads to a measurable change of the
behavior of the cross section as a function of of the target mass. Comparison
between the kaon and electron decay modes are made.


title:
Properties of a relativistic equation of state for collapse-driven
  supernovae

abstract:
  We study characteristics of the relativistic equation of state (EOS) for
collapse-driven supernovae, which is derived by relativistic nuclear many body
theory. Recently the relativistic EOS table has become available as a new
complete set of physical EOS for numerical simulations of supernova explosion.
We examine this EOS table by using general relativistic hydrodynamics of the
gravitational collapse and bounce of supernova cores. In order to study dense
matter in dynamical situation, we perform simplified calculations of core
collapse and bounce by following adiabatic collapse with the fixed electron
fraction for a series of progenitor models. This is intended to give us
``approximate models'' of prompt explosion. We investigate the profiles of
thermodynamical quantities and the compositions during collapse and bounce. We
also perform the calculations with the Lattimer-Swesty EOS to compare the
properties of dense matter. As a measure of the stiffness of the EOS, we
examine the explosion energy of the prompt explosion with electron capture
totally suppressed. We study the derivative of the thermodynamical quantities
obtained by the relativistic EOS to discuss the convective condition in
neutron-rich environment, which may be important in the delayed explosion.


title: Quasielastic neutrino-nucleus scattering

abstract:
  We study the sensitivity of neutral-current neutrino-nucleus scattering to
the strange-quark content of the axial-vector form factor of the nucleon. A
model-independent formalism for this reaction is developed in terms of eight
nuclear structure functions. Taking advantage of the insensitivity of the ratio
of proton $(\nu,\nu' p)$ to neutron $(\nu,\nu' n)$ yields to distortion
effects, we compute all structure functions in a relativistic plane wave
impulse approximation approach. Further, by employing the notion of a
bound-state nucleon propagator, closed-form, analytic expressions for all
nuclear-structure functions are developed in terms of an accurately calibrated
relativistic mean-field model. Using a strange-quark contribution to the
axial-vector form factor of $g_{A}^{s}=-0.19$, a significant enhancement in the
proton-to-neutron yields is observed relative to one with $g_{A}^{s}=0$.


title: Renormalization of EFT for nucleon-nucleon scattering

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


title: Breakup Reactions of Drip Line Nuclei

abstract:
  The formal theory of breakup reactions is reviewed. The direct breakup
mechanism which is formulated within the framework of the post form distorted
wave Born approximation is discussed in detail. In this theory, which requires
the information about only the ground state wave function of the projectile,
the fragment-target interactions are included to all orders while
fragment-fragment interaction is treated only in the first order. The general
applicability of this theory to describe the breakup of halo nuclei is
demonstrated by comparing the calculations with data for total, as well as
energy and angle integrated cross sections and momentum distributions of
fragments in reactions induced by a number of halo nuclei. We investigate the
role played by the pure Coulomb, pure nuclear and the Coulomb-nuclear
interference terms. Postacceleration effects in the Coulomb breakup of neutron
halo nuclei is also studied.


title:
Ultra peripheral heavy ion collisions and the energy dependence of the
  nuclear radius

abstract:
  To estimate realistic cross sections in ultra peripheral heavy ion collisions
we must remove effects of strong absorption. One method to eliminate these
effects make use of a Glauber model calculation, where the nucleon-nucleon
energy dependent cross sections at small impact parameter are suppressed. In
another method we impose a geometrical cut on the minimal impact parameter of
the nuclear collision ($b_{min} > R_1 + R_2$, where $R_i$ is the radius of ion
"$i$"). In this last case the effect of a possible nuclear radius dependence
with the energy has not been considered in detail up to now. Here we introduce
this effect showing that for final states with small invariant mass the effect
is negligible. However when the final state has a relatively large invariant
mass, e.g. an intermediate mass Higgs boson, the cross section can decrease up
to 50%.


title:
Rate Equation Network for Baryon Production in High Energy Nuclear
  Collisions

abstract:
  We develop and solve a network of rate equations for the production of
baryons and anti-baryons in high energy nuclear collisions. We include all
members of the baryon octet and decuplet and allow for transformations among
them. This network is solved during a relativistic 2+1 hydrodynamical expansion
of the of the hot matter created in the collision. As an application we compare
to the number of protons, lambdas, negative cascades, and omega baryons
measured at mid-rapidity in central collisions of gold nuclei at 65 GeV per
nucleon at the Relativistic Heavy Ion Collider (RHIC).


title:
Nuclear moments of inertia and wobbling motions in triaxial
  superdeformed nuclei

abstract:
  The wobbling motion excited on triaxial superdeformed nuclei is studied in
terms of the cranked shell model plus random phase approximation. Firstly, by
calculating at a low rotational frequency the \gamma-dependence of the three
moments of inertia associated with the wobbling motion, the mechanism of the
appearance of the wobbling motion in positive-\gamma nuclei is clarified
theoretically -- the rotational alignment of the \pi i_{13/2} quasiparticle(s)
is the essential condition. This indicates that the wobbling motion is a
collective motion that is sensitive to the single-particle alignment. Secondly,
we prove that the observed unexpected rotational-frequency dependence of the
wobbling frequency is an outcome of the rotational-frequency dependent
dynamical moments of inertia.


title:
Unified Scheme for Describing Time Delay and Time Advance in the
  Interpolation of Rotational Bands of Resonances

abstract:
  In this paper we show how rotational bands of resonances can be described by
using trajectories of poles of the scattering amplitude in the complex angular
momentum plane: each band of resonances is represented by the evolution of a
single pole lying in the first quadrant of the plane. The main result of the
paper consists in showing that also the antiresonances (or echoes) can be
described by trajectories of the scattering amplitude poles, instead of using
the hard-sphere potential scattering as prescribed by the classical
Breit-Wigner theory. The antiresonance poles lie in the fourth quadrant of the
complex angular momentum plane, and are associated with non-local potentials
which take into account the exchange forces; it derives a clear-cut separation
between resonance and antiresonance poles. The evolution of these latter poles
describes the passage from quantum to semi-classical physics. The theory is
tested on the rotational band produced by $\alpha$-$\alpha$ elastic scattering
and on the hadronic rotational bands in $\pi^+$-p elastic scattering.


title: Mass dependence of inclusive nuclear $\phi$ photoproduction

abstract:
  Based on a prior determination of the $\phi$ selfenergy in a nuclear medium
we perform a theoretical study of inclusive $\phi$ photoproduction in nuclei,
looking at the $A$ dependence of the cross sections for different $\phi$
momenta. We find sizeable reductions in the nuclear cross sections with respect
to the elementary one, using a $\phi$ selfenergy which implies a width about
six times the free one at normal nuclear density. The calculations are done to
match the set up for an ongoing experiment at {\it SPring8/Osaka} which should
provide valuable information on the renormalization of the $\phi$ properties in
nuclei.


title: Light clusters in nuclear matter of finite temperature

abstract:
  We investigate properties and the distribution of light nuclei (A<4) in
symmetric nuclear matter of finite temperature within a microscopic framework.
For this purpose we have solved few-body Alt-Grassberger-Sandhas type equations
for quasi-nucleons that include self-energy corrections and Pauli blocking in a
systematic way. In a statistical model we find a significant influence in the
composition of nuclear matter if medium effects are included in the microscopic
calculation of nuclei. If multiplicities are frozen out at a certain time (or
volume), we expect significant consequences for the formation of light
fragments in a heavy ion collision. As a consequence of the systematic
inclusion of medium effects the ordering of multiplicities becomes opposite to
the law of mass action of ideal components. This is necessary to explain the
large abundance of $\alpha$-particles in a heavy ion collision that are
otherwise largely suppressed in an ideal equilibrium scenario.


title: Spontaneus pion emission during fission - a new nuclear radioactivity

abstract:
  In this paper a short review of the theoretical problems of the pionic
radioactivity is presented. The essential experimental results obtained in the
18 years of existence of the nuclear pionic radioactivity are reviewed.
Moreover, using the recent results on the spontaneous fission half lives of the
heavy nuclei with Z >= 100 new predictions on the pionic yields in the region
of superheavy elements are established.


title:
Source Chaoticity from Two- and Three-Pion Correlations in Au+Au
  collisions at $\sqrt{s_{NN}}=130$ GeV?

abstract:
  We consistently analyze two-pion correlation functions and three-pion
correlation functions of 130$A$ GeV Au+Au collisions measured at RHIC, applying
three models of partially coherent pion sources. The effect of long-lived
resonances on the chaoticity in the two-pion correlation function is estimated
on the basis of a statistical model. We find that the chaoticity extracted from
the three-pion correlation function is consistent with that extracted from the
two-pion correlation function at vanishing relative momenta after the
subtraction of the contribution of the long-lived resonance decays.
  All three models indicate that pions are emitted from the mixture of a
chaotic source and coherent sources in the 130$A$ GeV Au+Au collisions.


title: Electric and magnetic form factors of strange baryons

abstract:
  Predictions for the electromagnetic form factors of the Lambda$, Sigma and Xi
hyperons are presented. The numerical calculations are performed within the
framework of the fully relativistic constituent-quark model developed by the
Bonn group. The computed magnetic moments compare favorably with the
experimentally known values. Most magnetic form factors G_M(Q^2) can be
parametrized in terms of a dipole with cutoff masses ranging from 0.79 to 1.14
GeV.


title: Two Proton Emission with Electromagnetic Probes

abstract:
  A model to study two-proton emission from nuclei induced by electromagnetic
probes is developed. The process is due to one-body electromagnetic operators,
acting together with short-range correlations, and two-body $\Delta$ currents.
The model includes all the diagrams containing a single correlation function.
The sensitivity of the cross section to the details of the correlation function
is studied by using realistic and schematic correlations. Results for the
$^{16}$O nucleus are presented.


title:
Low-Mass Proton-Antiproton Enhancement: Belle and BES Results, Premises
  of LEAR and Expectations from CLAS

abstract:
  We present a simple explanation for the recently observed near-threshold
proton-antiproton enhancement. It is described by a set of low-energy
parameters deduced from the analysis of NantiN experiments at LEAR. We predict
a related effect in photoproduction reaction under study by CLAS collaboration.


title: $J/\psi$-kaon cross section in meson exchange model

abstract:
  We calculate the cross section for the dissociation of $J/\psi$ by kaons
within the framework of a meson exchange model including anomalous parity
interactions. Off-shell effects at the vertices were handled with QCD sum rule
estimates for the running coupling constants. The total $J/\psi$-kaon cross
section was found to be $1.0 \sim1.6$ mb for $4.1\leq\sqrt{s}\leq5 \GeV$.


title: Balance functions in a thermal model with resonances

abstract:
  The pi+ pi- balance function in rapidity is computed in a thermal model with
resonances. It is found that the correlations from the neutral-resonance decays
are important, yielding about a half of the total contribution, which in
general consist of resonance and non-resonance parts. The model yields the
pionic balance function a few per cent wider that what follows from the recent
data for the Au+Au collisions at 130GeV.


title:
Charge density distributions and related form factors in neutron-rich
  light exotic nuclei

abstract:
  Charge form factors corresponding to proton density distributions in exotic
nuclei, such as $^{6,8}$He, $^{11}$Li, $^{17,19}$B and $^{14}$Be are calculated
and compared. The results can be used as tests of various theoretical models
for the exotic nuclei structure in possible future experiments using a
colliding electron-exotic nucleus storage ring. The result of such a comparison
would show the effect of the neutron halo or skin on the proton distributions
in exotic nuclei.


title:
Critical stability of three-body relativistic bound states with
  zero-range interaction

abstract:
  For zero-range interaction providing a given mass M_2 of the two-body bound
state, the mass M_3 of the relativistic three-body bound state is calculated.
We have found that the three-body system exists only when M_2 is greater than a
critical value M_c (approx. 1.43m for bosons and approx. 1.35m for fermions, m
is the constituent mass). For M_2=M_c the mass M_3 turns into zero and for
M_2<M_c there is no solution with real value of M_3.


title:
Family of Hermitian Low-Momentum Nucleon Interactions with Phase Shift
  Equivalence

abstract:
  Using a Schmidt orthogonalization transformation, a family of Hermitian
low-momentum NN interactions is derived from the non-Hermitian Lee-Suzuki (LS)
low-momentum NN interaction. As special cases, our transformation reproduces
the Hermitian interactions for Okubo and Andreozzi. Aside from their common
preservation of the deuteron binding energy, these Hermitian interactions are
shown to be phase shift equivalent, all preserving the empirical phase shifts
up to decimation scale Lambda. Employing a solvable matrix model, the Hermitian
interactions given by different orthogonalization transformations are studied;
the interactions can be very different from each other particularly when there
is a strong intruder state influence. However, because the parent LS
low-momentum NN interaction is only slightly non-Hermitian, the Hermitian
low-momentum nucleon interactions given by our transformations, including the
Okubo and Andreozzi ones, are all rather similar to each other. Shell model
matrix elements given by the LS and several Hermitian low-momentum interactions
are compared.


title:
Superfluid LDA (SLDA): Local Density Approximation for Systems with
  Superfluid Correlations

abstract:
  We present a concise account of our development of the first genuine Local
Density Approximation (LDA) to the Energy Density Functional (EDF) for
fermionic systems with superfluid correlations, with a particular emphasis to
nuclear systems.


title: Inclusive omega photoproduction off nuclei

abstract:
  We investigate inclusive omega photoproduction off complex nuclei,
concentrating on the feasibility to examine a possible in-medium change of the
omega meson properties by observing the pi^0 gamma invariant mass spectrum. The
simulations are performed by means of a BUU transport model including a full
coupled-channel treatment of the final state interactions. In-medium changes of
the omega spectral density are found to yield a moderate modification of the
observables as compared to the situation in free space. Also the effects of a
momentum dependence of the strong omega potential are discussed.


title: Theory of shell structure and of the "magic" effect in spherical nuclei

abstract:
  A consistent theory is developed of the volume energy oscillations of
spherical nuclei due to sharpness of the Fermi distribution boundary for
quasiparticles. The lowest value of the oscillating part of the energy
corresponds to a magic nucleus. A formula is obtained for the corresponding
limiting momentum of a quasiparticle and it is shown that we have here an
isolated point of a temperatureless second-order phase transition. An
expression for the discontinuity of the derivative of the energy of the body
with respect to the number of particles is obtained in the case of a sharp
(step-like) Fermi distribution limit. Comparison with experimental nuclear-mass
data permits some conclusions to be drawn regarding the true structure of the
boundary layer of the Fermi distribution and regarding its variation with
increasing nuclear size. In the region of magic nuclei actually accessible up
to the present time, apparently no signs are observed of any appreciably
expressed residual phenomenon, such as the Cooper phenomenon, which would
result in instability of the energy spectrum of infinite nuclear matter with an
absolutely sharp Fermi limit for quasiparticles.


title: A new semiempirical formula for exotic cluster decays of nuclei

abstract:
  A new semiempirical formula, with only three parameters, is proposed for
cluster decay half-lives. The parameters of the formula are obtained by making
a least square fit to the available experimental data. The calculated
half-lives are compared with an other model-independent scaling law proposed
earlier by Horoi {\it et al}. Also, the calculated results of this formula are
compared with the recent results of the preformed cluster model for $^{12}$C
and $^{14}$C emissions from different deformed and superdeformed Nd and Gd
parents. The results are in good agreement with experiments as well as other
models.


title: Resonance production in a thermal model

abstract:
  We discuss the pi+ pi- invariant-mass correlations and the resonance
production in a thermal model with single freeze-out. The predictions are
confronted with the recent data from the STAR Collaboration.


title: Pseudospin symmetry and the relativistic harmonic oscillator

abstract:
  A generalized relativistic harmonic oscillator for spin 1/2 particles is
studied. The Dirac Hamiltonian contains a scalar $S$ and a vector $V$ quadratic
potentials in the radial coordinate, as well as a tensor potential $U$ linear
in $r$. Setting either or both combinations $\Sigma=S+V$ and $% \Delta=V-S$ to
zero, analytical solutions for bound states of the corresponding Dirac
equations are found. The eigenenergies and wave functions are presented and
particular cases are discussed, devoting a special attention to the
nonrelativistic limit and the case $\Sigma=0$, for which pseudospin symmetry is
exact. We also show that the case $U=\Delta=0$ is the most natural
generalization of the nonrelativistic harmonic oscillator. The radial node
structure of the Dirac spinor is studied for several combinations of
harmonic-oscillator potentials, and that study allows us to explain why nuclear
intruder levels cannot be described in the framework of the relativistic
harmonic oscillator in the pseudospin limit.


title: A microscopic NN to NN*(1440) potential

abstract:
  By means of a NN to NN*(1440) transition potential derived in a
parameter-free way from a quark-model based NN potential, we determine
simultaneously the $\pi NN^*(1440)$ and $\sigma NN^*(1440)$ coupling constants.
We also present a study of the target Roper excitation diagram contributing to
the $p(d,d')$ reaction.


title: Resource Note on Photofission of Nuclei

abstract:
  Open-source data exists, in widely scattered places, on photofission of the
important nuclear isotopes ^{235}U and ^{239}Pu. This data is useful for
studies aimed at detecting these materials at ports of entry. An introductory
survey is given to access that data.


title: Hadrons in Nuclei

abstract:
  Changes of hadronic properties in dense nuclear matter as predicted by theory
have usually been investigated by means of relativistic heavy-ion reactions. In
this talk I show that observable consequences of such changes can also be seen
in more elementary reactions on nuclei. Particular emphasis is put on a
discussion of photonuclear reactions; examples are the dilepton production at
$\approx 1$ GeV and the hadron production in nuclei at 10 - 20 GeV photon
energies. The observable effects are expected to be as large as in relativistic
heavy-ion collisions and can be more directly related to the underlying
hadronic changes.


title:
Hybrid stars in the quark-meson coupling model with superconducting
  quark matter

abstract:
  The phase transition to a deconfined phase is studied and the consequences in
the formation of neutron stars are investigated. We use the
quark-meson-coupling model for the hadron matter and the MIT Bag model for the
quark matter in order to build the appropriate equations of state for the
hybrid stars. The properties of the stars are then calculated. The differences
between unpaired and color-flavor locked quark matter are discussed.


title: Heavy Quark Radiative Energy Loss in QCD Matter

abstract:
  Heavy quark medium induced radiative energy loss is derived to all orders in
opacity, $(L/\lambda_g)^n$. The analytic expression generalizes the GLV opacity
expansion for massless quanta to heavy quarks with mass $M$ in a QCD plasma
with a gluon dispersion characterized by an asymptotic plasmon mass,
$m_g=gT/\sqrt{2}$. Remarkably, we find that the general result is obtained by
simply shifting all frequencies in the GLV series by $(m_g^2+x^2 M^2)/(2 x E)$.
Numerical evaluation of the first order in opacity energy loss shows that both
charm and bottom energy losses are much closer to the incoherent radiation
limit than light partons in nuclear collisions at both RHIC and LHC energies.
However, the radiation lengths of heavy quarks remain large compared to nuclear
dimensions and hence high $p_T$ heavy quark production is volume rather than
surface dominated.


title: Dilute Multi Alpha Cluster States in Nuclei

abstract:
  Dilute multi $\alpha$ cluster condensed states with spherical and axially
deformed shapes are studied with the Gross-Pitaevskii equation and Hill-Wheeler
equation, where the $\alpha$ cluster is treated as a structureless boson.
Applications to self-conjugate $4N$ nuclei show that the dilute $N\alpha$
states of $^{12}$C to $^{40}$Ca with $J^\pi=0^+$ appear in the energy region
from threshold up to about 20 MeV, and the critical number of $\alpha$ bosons
that the dilute $N\alpha$ system can sustain as a self-bound nucleus is
estimated roughly to be $N_{cr}\sim10$. We discuss the characteristics of the
dilute $N\alpha$ states with emphasis on the $N$ dependence of their energies
and rms radii.


title:
Exclusive $\phi$ production in proton-proton collisions in the resonance
  model

abstract:
  The exclusive $\phi$ meson production in proton-proton reactions is
calculated within the resonance model. The considered model was already
successfully applied to the description of $\pi$, $\eta$, $\rho$, $\omega$,
$\pi\pi$ production in proton-proton collisions. The only new parameter
entering into the model is the $\omega-\phi$ mixing angle $\theta_{mix}$ which
is taken equal to $\theta_{mix} \approx 3.7^o$.


title: The $\eta{-}^3$He scattering length revisited

abstract:
  The possible existence of $\eta$-mesic nuclei poses an interesting and still
open issue of research. Since the occurence of such $\eta$-nucleus bound states
is reflected in the corresponding $\eta$-nucleus scattering length, we
critically review the present knowledge for the $\eta$$^3$He system.
Specifically, we scrutinize the available experimental information for the
reaction $p{+}d \to \eta {+} ^3{\rm He}$ which is commonly used to extract the
$\eta$$^3$He scattering length. We point out several striking discrepancies
between the various measurements. Subject to those inconsistencies we deduce a
value of $a{=}|4.3{\pm}0.3|{+}i(0.5{\pm}0.5)$ fm.


title: The mass of charmonium in nuclear matter

abstract:
  The masses of charmonium states immersed in nuclear matter are calculated in
LO QCD and in QCD sum rules. While the mass shift for $J/\psi$ are found to be
less than -10 MeV, those for the $\chi_{0,1,2}$ and $\psi(3686)$ and
$\psi(3770)$ are found to be more than -40 MeV. We investigate the feasibility
of observing such mass shifts in the future accelerator project at GSI.


title:
On kaonic hydrogen. Quantum field theoretic and relativistic covariant
  approach

abstract:
  We study kaonic hydrogen, the bound K^-p state A_(Kp). Within a quantum field
theoretic and relativistic covariant approach we derive the energy level
displacement of the ground state of kaonic hydrogen in terms of the amplitude
of K^-p scattering for arbitrary relative momenta. The amplitude of low-energy
K^-p scattering near threshold is defined by the contributions of three
resonances Lambda(1405), Lambda(1800) and Sigma^0(1750) and a smooth elastic
background. The amplitudes of inelastic channels of low-energy K^-p scattering
fit experimental data on near threshold behaviour of the cross sections and the
experimental data by the DEAR Collaboration. We use the soft-pion technique
(leading order in Chiral Perturbation Theory) for the calculation of the
partial width of the radiative decay of pionic hydrogen A_(pi p) -> n + gamma
and the Panofsky ratio. The theoretical prediction for the Panofsky ratio
agrees well with experimental data. We apply the soft-kaon technique (leading
order in Chiral Perturbation Theory) to the calculation of the partial widths
of radiative decays of kaonic hydrogen A_(Kp) -> Lambda^0 + gamma and A_(Kp) ->
Sigma^0 + gamma. We show that the contribution of these decays to the width of
the energy level of the ground state of kaonic hydrogen is less than 1%.


title: Coupled cluster calculations of ground and excited states of nuclei

abstract:
  The standard and renormalized coupled cluster methods with singles, doubles,
and noniterative triples and their generalizations to excited states, based on
the equation of motion coupled cluster approach, are applied to the He-4 and
O-16 nuclei. A comparison of coupled cluster results with the results of the
exact diagonalization of the Hamiltonian in the same model space shows that the
quantum chemistry inspired coupled cluster approximations provide an excellent
description of ground and excited states of nuclei. The bulk of the correlation
effects is obtained at the coupled cluster singles and doubles level. Triples,
treated noniteratively, provide the virtually exact description.


title: Three-neutrino model analysis of the world's oscillation data

abstract:
  A model of neutrino oscillation experiments is constructed. The experiments
incorporated are: solar neutrinos (Chlorine, Gallium, Super-K, and SNO),
reactor neutrinos (Bugey and CHOOZ), beam stop neutrinos (LSND decay at rest
and decay in flight), and atmospheric neutrinos. Utilizing this model and the
standard three-neutrino mixing extension of the standard model, the data are
analyzed. Solutions for the mixing angles and mass-squared differences are
found to occur in pairs corresponding to the interchange $\Delta m^2_{12}
\leftrightarrow \Delta m^2_{23}$. Two pairs of solutions are found that
reasonably reproduce the data, including the LSND data. These solutions are
$\theta_{12}\approx 0.5$, $\theta_{13}\approx 0.1$, $\theta_{23}\approx 0.7$,
$\Delta m^2_{12} \approx 5\times 10^{-5}$ eV$^2$ and $\Delta m^2_{23} \approx
0.2$ eV$^2$ or 2.4 eV$^2$. Other statistically significant solutions are also
found which produce negligible oscillations for the LSND experiments.


title: Nuclear Periphery in Mean-Field Models

abstract:
  The halo factor is one of the experimental data which describes a
distribution of neutrons in nuclear periphery. In the presented paper we use
Skyrme-Hartree (SH) and the Relativistic Mean Field (RMF) models and we
calculate the neutron excess factor $\Delta_B$ defined in the paper which
differs slightly from halo factor $f_{\rm exp}$. The results of the
calculations are compared to the measured data.


title:
Invariant-Mass Spectroscopy for Condensed Single- and Double-\kbar
  Nuclear Clusters to be Formed as Residues in Relativistic Heavy-Ion
  Collisions

abstract:
  Using a phenomenological \={K}N interaction combined with the method of
Antisymmetrized Molecular Dynamics., we predict that few-body double-\kbar
nuclei, such as ppK$^-$K$^-$ and ppnK$^-$K$^-$, as well as single-\kbar nuclei,
are tightly bound compact systems with large binding energies and ultra-high
nucleon densities. We point out that these \kbar nuclear clusters can be
produced as residual fragments in relativistic heavy-ion collisions and that
their invariant masses can be reconstructed from their decay particles.


title: Self-consistent treatment of the self-energy in nuclear matter

abstract:
  The influence of hole-hole propagation in addition to the conventional
particle-particle propagation, on the energy per nucleon and the momentum
distribution is investigated. The results are compared to the
Brueckner-Hartree-Fock (BHF) calculations with a continuous choice and
conventional choice for the single-particle spectrum. The Bethe-Goldstone
equation has been solved using realistic $NN$ interactions. Also, the structure
of nucleon self-energy in nuclear matter is evaluated. All the self-energies
are calculated self-consistently. Starting from the BHF approximation without
the usual angle-average approximation, the effects of hole-hole contributions
and a self-consistent treatment within the framework of the Green function
approach are investigated. Using the self-consistent self-energy, the hole and
particle self-consistent spectral functions including the particle-particle and
hole-hole ladder contributions in nuclear matter are calculated using realistic
$NN$ interactions. We found that, the difference in binding energy between both
results, i.e. BHF and self-consistent Green function, is not large. This
explains why is the BHF ignored the 2h1p contribution.


title:
Pentaquark $\Theta^+$ production from the reaction $\gamma
  p\to\pi^+K^-\Theta^+$

abstract:
  The cross section for $\Theta^+$ production from the reaction $\gamma
p\to\pi^+K^-\Theta^+$, which was observed in the CLAS experiment at the
Jefferson National Laboratory, is evaluated in a hadronic model that includes
couplings of $\Theta^+$ to both $KN$ and $K^*N$. With their coupling constants
determined from the empirical $\pi NN(1710)$ and $\rho NN(1710)$ coupling
constants using the SU(3) symmetry, the cross section for this reaction has
been evaluated by taking $\Theta^+$ to have spin 1/2 and isospin 0 but either
positive or negative parity. We find that the cross section is 10-15 nb if
$\Theta^+$ has positive parity as predicted by the chiral soliton model. The
cross section is reduced by more than a factor of 10 if $\Theta^+$ has negative
parity as given by lattice QCD studies. For both parities, the differential
distribution peaks at small negative four momentum transfer as expected from
the dominating $t$-channel kaon-exchange diagram that involves only the
coupling of $\Theta^+$ to $KN$.


title: Quark-Hadron Duality and Scaling in Reduced QCD

abstract:
  We introduce a generalization of 1+1 dimensional large Nc QCD, which we refer
to as ``reduced'' QCD, or rQCD. In this model gluons and quark momenta live in
1+1 dimensions only, but the quark spin and all other particles (leptons, and
the photon) live in the full 1+3 dimensions. The bound states of quarks and
antiquarks are identical to those originally described by 't Hooft (except that
there are new transversely polarized states previously excluded), so the model
is exactly soluable. However, significant differences arise when the model is
applied to electromagnetic interactions. After reviewing the strongly
interacting sector of the theory, we discuss deep inelastic scattering (DIS) in
this model, and show that the new states with transverse polarization give the
Callan-Gross relation and remove the pathological features of the original 1+1
dimensional description. We conclude that rQCD gives a satisfactory description
of the phenomenology and provides a deep understanding of both duality and DIS.