title: Canonical Quantization of SU(3) Skyrme Model in a General Representation

abstract:
  A complete canonical quantization of the SU(3) Skyrme model performed in the
collective coordinate formalism in general irreducible representations. In the
case of SU(3) the model differs qualitatively in different representations. The
Wess-Zumino-Witten term vanishes in all self-adjoint representations in the
collective coordinate method for separation of space and time variables. The
canonical quantization generates representation dependent quantum mass
corrections, which can stabilize the soliton solution. The standard symmetry
breaking mass term, which in general leads to representation mixing,
degenerates to the SU(2) form in all self-adjoint representations.


title: 3D Jet Tomography of Twisted Strongly Coupled Quark Gluon Plasmas

abstract:
  The triangular enhancement of the rapidity distribution of hadrons produced
in p+A reactions relative to p+p is a leading order in A^{1/3}/log(s) violation
of longitudinal boost invariance at high energies. In A+A reactions this leads
to a trapezoidal enhancement of the local rapidity density of produced gluons.
The local rapidity gradient is proportional to the local participant number
asymmetry, and leads to an effective rotation in the reaction plane. We propose
that three dimensional jet tomography, correlating the long range rapidity and
azimuthal dependences of the nuclear modification factor,
R_{AA}(\eta,\phi,p_\perp; b>0), can be used to look for this intrinsic
longitudinal boost violating structure of $A+A$ collisions to image the
produced twisted strongly coupled quark gluon plasma (sQGP). In addition to
dipole and elliptic azimuthal moments of R_{AA}, a significant high p_\perp
octupole moment is predicted away from midrapidity. The azimuthal angles of
maximal opacity and hence minima of R_{AA} are rotated away from the normal to
the reaction plane by an `Octupole Twist' angle, \theta_3(\eta), at forward
rapidities.


title:
A relativistic Glauber approach to polarization transfer in
  4He(\vec{e},e'\vec{p})

abstract:
  Polarization-transfer components for 4He(\vec{e},e'\vec{p})3H are computed
within the relativistic multiple-scattering Glauber approximation (RMSGA). The
RMSGA framework adopts relativistic single-particle wave functions and
electron-nucleon couplings. The predictions with free and various
parametrizations for the medium-modified electromagnetic form factors are
compared to the world data.


title:
A derivation of the Boltzmann-Vlasov equation from multiple scattering
  using the Wigner function

abstract:
  A derivation is given of the Boltzmann-Vlasov equation beginning from
multiple scattering considerations. The motivation for the discussion, which is
purely pedagogical in nature, is the current interest in understanding the
origins of transport equations in terms of rigorous field-theory descriptions,
or, as in this case, exact nonrelativistic formulations.


title:
Determination of S17 from 8B breakup by means of the method of
  continuum-discretized coupled-channels

abstract:
  The astrophysical factor for 7Be(p,\gamma)8B at zero energy, S17(0), is
determined from an analysis of 208Pb(8B, p+7Be)208Pb at 52 MeV/nucleon by means
of the method of continuum-discretized coupled-channels (CDCC) taking account
of all nuclear and Coulomb breakup processes. The asymptotic normalization
coefficient (ANC) method is used to extract S17(0) from the calculated
breakup-cross-section. The main result of the present paper is S17(0)=20.9
+2.0/-1.9 eV b. The error consists of 8.4% experimental systematic error and
the error due to the ambiguity in the s-wave p-7Be scattering length. This
value of S17(0) differs from the one extracted with the first-order
perturbation theory including Coulomb breakup by dipole transitions: 18.9 +/-
1.8 eV b. It turns out that the difference is due to the inclusion of the
nuclear and Coulomb-quadrupole transitions and multi-step processes of
all-order in the present work. The p-7Be interaction potential used in the CDCC
calculation is also used in the ANC analysis of 7Be(p,\gamma)8B. The value of
S17(0)=21.7 +0.62/-0.55 eV b obtained is consistent with the previous one
obtained from a precise measurement of the p-capture reaction cross section
extrapolated to zero incident energy, S17(0)=22.1 +/- 0.6 (expt) +/- 0.6 (theo)
eV b, where (theo) stands for the error in the extrapolation. Thus, the
agreement between the values of S17(0) obtained from direct 7Be(p,\gamma)8B and
indirect 8B-breakup measurements is significantly improved.


title: Relativistic models for quasi-elastic neutrino scattering

abstract:
  We present quasi-elastic neutrino-nucleus cross sections in the energy range
from 150 MeV up to 5 GeV for the target nuclei 12C and 56Fe. A relativistic
description of the nuclear dynamics and the neutrino-nucleus coupling is
adopted. For the treatment of final-state interactions (FSI) we rely on two
frameworks succesfully applied to exclusive electron-nucleus scattering: a
relativistic optical potential and a relativistic multiple-scattering Glauber
approximation. At lower energies, the optical-potential approach is considered
to be the optimum choice, whereas at high energies a Glauber approach is more
natural. Comparing the results of both calculations, it is found that the
Glauber approach yields valid results down to the remarkably small nucleon
kinetic energies of 200 MeV. We argue that the nuclear transparencies extracted
from A(e,e'p) measurements can be used to obtain realistic estimates of the
effect of FSI mechanisms on quasi-elastic neutrino-nucleus cross sections. We
present two independent relativistic plane-wave impulse approximation (RPWIA)
calculations of quasi-elastic neutrino-nucleus cross sections. They agree at
the percent level, showing the reliability of the numerical techniques adopted
and providing benchmark RPWIA results.


title: High energy electroproduction off complex nuclei

abstract:
  We investigate hadron attenuation in deep-inelastic lepton scattering off
complex nuclei in the kinematic regime of the HERMES experiment. Our transport
theoretical simulations reveal strong prehadronic final state interactions of
the reaction products with the surrounding nuclear medium early after the
initial photon-nucleon interaction has taken place. In this work we compare our
model results with the measured hadron multiplicity ratios for a Kr target at
HERMES and provide an extended discussion of the double-hadron attenuation
recently observed at HERMES.


title:
A coupled-channel analysis of $K\Lambda$ production in the nucleon
  resonance region

abstract:
  A unitary coupled-channel effective Lagrangian model is applied to the
combined analysis of the $(\pi,\gamma) N \to K\Lambda$ reactions in the energy
region up to 2 GeV. To constrain the resonance couplings to the $K\Lambda$
final state the recent photoproduction data obtained by the SAPHIR, SPring-8,
and CLAS groups are included into the calculations. The main resonance
contributions to the process stem from the $S_{11}(1650)$, $P_{13}(1720)$, and
$P_{13}(1900)$ states. The second bump at 1.9 GeV seen in the photoproduction
cross section data is described as a coherent sum of the resonance and
background contributions. The prediction for the beam polarization observable
is presented.


title: Quasiparticle Resonances in the BCS Approach

abstract:
  We present a simple method for calculating the energies and the widths of
quasiparticle resonant states. The method is based on BCS equations solved in
the Berggren representation. In this representation the quasiparticle
resonances are associated to the Gamow states of the mean field. The method is
illustrated for the case of neutron-rich nuclei $^{20-22}$O and $^{84}$Ni. It
is shown that the contribution of the continuum coupling to the pairing
correlations is small and largely dominated by a few resonant states close to
the continuum threshold.


title:
Landau-Ginzburg method applied to finite fermion systems: Pairing in
  Nuclei

abstract:
  Given the spectrum of a Hamiltonian, a methodology is developed which employs
the Landau-Ginsburg method for characterizing phase transitions in infinite
systems to identify phase transition remnants in finite fermion systems. As a
first application of our appproach we discuss pairing in finite nuclei.


title:
On the splitting of nucleon effective masses at high isospin density:
  reaction observables

abstract:
  We review the present status of the nucleon effective mass splitting $puzzle$
in asymmetric matter, with controversial predictions within both
non-relativistic $and$ relativistic approaches to the effective in medium
interactions. Based on microscopic transport simulations we suggest some rather
sensitive observables in collisions of asymmetric (unstable) ions at
intermediate ($RIA$) energies: i) Energy systematics of Lane Potentials; ii)
Isospin content of fast emitted nucleons; iii) Differential Collective Flows.
Similar measurements for light isobars (like $^3H-^3He$) could be also
important.


title: Pedestal and Peak Structure in Jet Correlation

abstract:
  We study the characteristics of correlation between particles in jets
produced in heavy-ion collisions. In the framework of parton recombination we
calculate the $\eta$ and $\phi$ distributions of a pion associated with a
trigger particle. The origin of the pedestal in $\Delta\eta$ is related to the
longitudinal expansion of the thermal partons that are enhanced by the energy
loss of hard partons traversing the bulk medium. The peaks in $\Delta\eta$ and
$\Delta\phi$ are related to the same angular spread of the shower partons in a
jet cone. No artificial short- or long-range correlations are put in by hand. A
large part of the correlation between hadrons in jets is due to the correlation
among the shower partons arising from momentum conservation. Recombination
between thermal and shower partons dominates the correlation characterisitics
in the intermediate $p_T$ region.


title: Special Relativity and Reactions with Unstable Nuclei

abstract:
  Dynamical relativistic effects are often neglected in the description of
reactions with unstable nuclear beams at intermediate energies (E ~ 100
MeV/nucleon). Evidently, this introduces sizable errors in experimental
analysis and theoretical descriptions of these reactions. This is particularly
important for the experiments held in GANIL/France, MSU/USA, RIKEN/Japan and
GSI/Germany. I review a few examples where relativistic effects have been
studied in nucleus-nucleus scattering at intermediate energies.


title: Hadrons in Medium

abstract:
  In these lectures I first give a motivation for investigations of in-medium
properties of hadrons. I discuss the relevant symmetries of QCD and how they
might affect the observed hadron properties. I then discuss at length the
observable consequences of in-medium changes of hadronic properties in
reactions with elementary probes, and in particular photons, on nuclei. Here I
put an emphasis on new experiments on changes of the sigma and omega mesons in
medium.


title:
Analytic Description of Critical Point Actinides in a Transition from
  Octupole Deformation to Octupole Vibrations

abstract:
  An analytic collective model in which the relative presence of the quadrupole
and octupole deformations is determined by a parameter (phi_0), while axial
symmetry is obeyed, is developed. The model [to be called the analytic
quadrupole octupole axially symmetric model (AQOA)] involves an infinite well
potential, provides predictions for energy and B(EL) ratios which depend only
on phi_0, draws the border between the regions of octupole deformation and
octupole vibrations in an essentially parameter-independent way, and describes
well 226-Th and 226-Ra, for which experimental energy data are shown to suggest
that they lie close to this border. The similarity of the AQOA results with
phi_0=45 degrees for ground state band spectra and B(E2) transition rates to
the predictions of the X(5) model is pointed out. Analytic solutions are also
obtained for Davidson potentials, leading to the AQOA spectrum through a
variational procedure.


title:
Shape Phase Transition of the Axially Symmetric States Between the U(5)
  and SU(3) Symmetries

abstract:
  The shape phase structure and its transition of the nucleus in the
transitional region between the U(5) and SU(3) symmetries is restudied within
the framework of coherent-state theory with angular momentum projection in
IBM-1. The certain angular momentum (or rotation-driven) effect on the nuclear
shape is discussed. A coexistence of prolate and oblate shapes is found for the
ground states of the transitional nuclei. A phase diagram in terms of the
deformation parameter and angular momentum is given.


title:
Review of HBT or Bose-Einstein correlations in high energy heavy ion
  collisions

abstract:
  A brief review is given on the discovery and the first five decades of the
Hanbury Brown - Twiss effect and its generalized applications in high energy
nuclear and particle physics, that includes a meta-review. Interesting and
inspiring new directions are also highlighted, including for example source
imaging, lepton and photon interferometry, non-Gaussian shape analysis as well
as many other new directions. Existing models are compared to two-particle
correlation measurements and the so-called RHIC HBT puzzle is resolved.
Evidence for a (directional) Hubble flow is presented and the conclusion is
confirmed by a successful description of the pseudorapidity dependence of the
elliptic flow as measured in Au+Au collisions by the PHOBOS Collaboration.


title:
Screened thermonuclear reactions and predictive stellar evolution of
  detached double-lined eclipsing binaries

abstract:
  The low energy fusion cross sections of charged-particle nuclear reactions
(and the respective reaction rates) in stellar plasmas are enhanced due to
plasma screening effects. We study the impact of those effects on predictive
stellar evolution simulations for detached double-lined eclipsing binaries. We
follow the evolution of binary systems (pre-main sequence or main sequence
stars) with precisely determined radii and masses from 1.1Mo to 23Mo (from
their birth until their present state). The results indicate that all the
discrepancies between the screened and unscreened models (in terms of
luminosity, stellar radius, and effective temperature) are within the
observational uncertainties. Moreover, no nucleosynthetic or compositional
variation was found due to screening corrections. Therefore all thermonuclear
screening effects on the charged-particle nuclear reactions that occur in the
binary stars considered in this work (from their birth until their present
state) can be totally disregarded. In other words, all relevant
charged-particle nuclear reactions can be safely assumed to take place in a
vacuum, thus simplifying and accelerating the simulation processes.


title: Enhancement Mechanisms of Low Energy Nuclear Reactions

abstract:
  The review of possible stimulation mechanisms of LENR (low energy nuclear
reaction) is represented. We have concluded that transmutation of nuclei at low
energies and excess heat are possible in the framework of the modern physical
theory - the universal resonance synchronization principle [1] and based on its
different enhancement mechanisms of reaction rates are responsible for these
processes [2]. The excitation and ionization of atoms may play role as a
trigger for LENR. Superlow energy of external fields may stimulate LENR [3].
Investigation of this phenomenon requires knowledge of different branches of
science: nuclear and atomic physics, chemistry and electrochemistry, condensed
matter and solid state physics,... The results of this research field can
provide a new source of energy, substances and technologies.
  The puzzle of poor reproducibility of experimental data is due to the fact
that LENR occurs in open systems and it is extremely sensitive to parameters of
external fields and systems. Classical reproducibility principle should be
reconsidered for LENR experiments. Poor reproducibility and unexplained results
do not means that the experiment is wrong. Our main conclusions:


title: Recent Theoretical Studies on Hadronic Atoms

abstract:
  A report contains a review of recent theoretical investigations on kaonic
atoms carried out at Stefan Meyer Institute of the Austrian Academy of
Sciences. We discuss (1) a phenomenological quantum field theoretic model for
bar-K N interactions at threshold of the reactions K^-p -> K^-p, K^-n -> K^-n
and K^-d ->K^-d, and (2) the energy level displacements of the ground and nP
excited states of kaonic hydrogen, (3) the contribution of the sigma-term to
the shift of the energy level of the ground state of kaonic hydrogen, (4) the
isospin-breaking and dispersive corrections to the energy level displacement of
the ground state of kaonic hydrogen, (5) the radiative transitions nP -> 1S +
\gamma, induced by strong low-energy interactions and enhanced by the Coulomb
interaction, in kaonic hydrogen and kaonic deuterium, (6) Perspectives and (7)
Comments on the approach, where we adduce our recent results obtained after the
Workshop EXA05.


title:
Exactly Solvable Pairing Model Using an Extension of Richardson-Gaudin
  Approach

abstract:
  We introduce a new class of exactly solvable boson pairing models using the
technique of Richardson and Gaudin. Analytical expressions for all energy
eigenvalues and first few energy eigenstates are given. In addition, another
solution to Gaudin's equation is also mentioned. A relation with the
Calogero-Sutherland model is suggested.


title: Structure of isomeric states in 66As and 67As

abstract:
  Strong residual correlations between neutrons and protons in N ~ Z systems
can lead to unusual structure. Using the spherical shell model, we show that a
low-excitation shape isomer can occur in the odd-odd N=Z nucleus 66As. This
extends the picture of shape coexistence beyond even-even nuclei. Furthermore,
it is demonstrated that in 66As and in the N=Z+1 nucleus 67As, a new type of
isomer, which we term j-isomer, can be formed. The underlying mechanism for the
isomerism formation is structure change in the isomeric states, which involves
either an alignment of a neutron-proton pair from the high-j intruder orbitals,
or a simultaneous occupation of these neutron and proton high-j orbitals.


title: Isospin asymmetry and type-I superconductivity in neutron star matter

abstract:
  It has been argued by Buckley et. al.(Phys. Rev. Lett. 92, 151102, 2004) that
nuclear matter is a type-I rather than a type-II superconductor. The suggested
mechanism is a strong interaction between neutron and proton Cooper pairs,
which arises from an assumed U(2) symmetry of the effective potential, which is
supposed to originate in isospin symmetry of the underlying nuclear
interactions. To test this claim, we perform an explicit mean-field calculation
of the effective potential of the Cooper pairs in a model with a simple
four-point pairing interaction. In the neutron star context, matter is very
neutron rich with less than 10% protons, so there is no neutron-proton pairing.
We find that under these conditions our model shows no interaction between
proton Cooper pairs and neutron Cooper pairs at the mean-field level. We
estimate the leading contribution beyond mean field and find that it is is
small and attractive at weak coupling.


title:
Description of intermediate- and short-range NN nuclear force within a
  covariant effective field theory

abstract:
  The present paper is aimed to developing an effective field theory in the GeV
region to describe consistently both elastic and inelastic NN-scattering in a
fully covariant way. In this development we employ our novel s-channel
mechanism of NN-interaction at intermediate and short ranges assuming a
formation of the six-quark bag dressed with basic meson fields such as $\pi$,
$\sigma$, $\rho$ and $\omega$ in the intermediate state. The peripheral part of
the interaction is governed by t-channel one- and two-pion exchanges described
fairly well by chiral perturbation theory. The $\sigma$-meson dressing should
be especially important for the stabilization of the bag due to a high coupling
constant of the $\sigma$-meson with the bag and also a strong interaction
between the $\sigma$-field and space symmetric quark core $|s^6[6]>$. This
stabilization of the intermediate dressed bag (which shifts the mass of the bag
downward to NN threshold) will be crucially important for the description of
$\pi$, $2\pi$, $\rho$ and $\omega$-meson production in NN-collisions, and, in
particular, for the correct description of $\pi^0$ production near threshold.
So that, we expect that the results of the present work will lead to a deeper
understanding the short- and intermediate-range nuclear forces and internucleon
correlations in nuclei.


title:
Resonance Absorption and Regeneration in Relativistic Heavy Ion
  Collisions

abstract:
  The regeneration of hadronic resonances is discussed for heavy ion collisions
at SPS and SIS-300 energies. The time evolutions of Delta, rho and phi
resonances are investigated. Special emphasize is put on resonance regeneration
after chemical freeze-out. The emission time spectra of experimentally
detectable resonances are explored.


title:
Improved (e,e') response functions at intermediate momentum transfers:
  the 3He case

abstract:
  A possibility of extending the applicability range of non-relativistic
calculations of electronuclear response functions in the quasielasic peak
region is studied. We show that adopting a particular model for determining the
kinematical inputs of the non-relativistic calculations can extend this range
considerably, almost eliminating the reference frame dependence of the results.
We also show that there exists one reference frame, where essentially the same
result can be obtained with no need of adopting the particular kinematical
model. The calculation is carried out with the Argonne V18 potential and the
Urbana IX three-nucleon interaction. A comparison of these improved
calculations with experimental data shows a very good agreement for the
quasielastic peak positions at $q=500,$ 600, 700 MeV/c and for the peak heights
at the two lower $q$--values, while for the peak height at $q=700$ MeV/c one
finds differences of about 20%.


title:
Molecular dynamics simulation for baryon-quark phase transition at
  finite temperature and density

abstract:
  We study the baryon-quark phase transition in a molecular dynamics (MD) of
quark degrees of freedom at finite temperature and density. The baryon state at
low density and temperature, and the deconfined quark state at high density and
temperature are reproduced. We investigate the equations of state of matters
with different $u$-$d$-$s$ compositions. Then we draw phase diagrams in the
temperature-density plane by this simulation. It is found that the baryon-quark
transition is sensitive to the quark width.


title:
$\pi^0$-Photoproduction on the deuteron via $\Delta$-excitation using
  the Lorentz Integral Transform

abstract:
  The Lorentz Integral Transform method (LIT) is extended to pion
photoproduction in the $\Delta$-resonance region. The main focus lies on the
solution of the conceptual difficulties which arise if energy dependent
operators for nucleon resonance excitations are considered. In order to
demonstrate the applicability of our approach, we calculate the inclusive cross
section for $\pi^0$-photoproduction off the deuteron within a simple pure
resonance model.


title:
Quasiparticle time blocking approximation within the framework of
  generalized Green function formalism

abstract:
  The problem of the microscopic description of excited states of the even-even
open-shell atomic nuclei is considered. A model is formulated which allows one
to go beyond the quasiparticle random phase approximation. The physical content
of the model is determined by the quasiparticle time blocking approximation
(QTBA) which enables one to include contributions of the two-quasiparticle and
the two-phonon configurations, while excluding (blocking) more complicated
intermediate states. In addition, the QTBA ensures consistent treatment of
ground state correlations in the Fermi systems with pairing. The model is based
on the generalized Green function formalism (GGFF) in which the normal and the
anomalous Green functions are treated in a unified way in terms of the
components of generalized Green functions in a doubled space. Modification of
the GGFF is considered in the case when the many-body nuclear Hamiltonian
contains two-, three-, and other many-particle effective forces.


title:
Extraction of Structure Functions from Quasielastic Electron Scattering
  (e,e') from Medium and Heavy Nuclei

abstract:
  Using a relativistic mean-field single particle knock-out model for (e,e')
reactions on nuclei, we investigate approximate treatments of Coulomb
distortion effects and the extraction of longitudinal and transverse structure
functions. We show that an effective momentum approximation (EMA) when coupled
with a focusing factor provides a good description of the transverse
contributions to the (e,e') cross sections for electron energies above 300 MeV
on 208Pb. This approximation is not as good for the longitudinal contributions
even for incident electron eneriges above 1 GeV and if one requires very
precise extraction of longitudinal and transverse structure functions in the
quasielastic region it is necessary to utilize distortion factors based on a
nuclear model and a more accurate inclusion of Coulomb distortion effects.


title: Finite hadronization time and unitarity in quark recombination model

abstract:
  The effect of finite hadronization time is considered in the recombination
model, and it is shown that the hadron multiplicity turns out to be
proportional to the initial quark density and unitarity is conserved in the
model. The baryon to meson ratio increases rapidly with the initial quark
density due to competition among different channels.


title:
Effect of Hadronic Rescattering on Elliptic Flow Following Hydrodynamics
  Model

abstract:
  The effect of hadronic rescattering on the elliptic flow has been
investigated by the Cooper-Frye hadronization model from hydrodynamic evolution
following by the afterburner hadronic rescattering model for 200 GeV/c Au + Au
at 20-40% centrality. It is found that the hadronic rescattering can suppress
elliptic flow $v_2$ in momentum space especially in lower transverse momentum
region. In addition, the hadronic rescattering effects on transverse momentum
spectra and anisotropy coordinate space of hadrons are studied.


title: Isoscaling of projectile-like fragments

abstract:
  The isotopic and isotonic distributions of the projectile fragmentation
products have been simulated by a modified statistical abrasion-ablation (SAA)
model and the isoscaling behavior of projectile-like fragments has been
discussed. The isoscaling parameters $\alpha$ and $\beta$ for hot fragments
before evaporation and cold fragments after evaporation have been extracted,
respectively. It looks that the evaporation has strong effect on $\alpha$. For
cold fragments, a monotonic increase of $\alpha$ and $|\beta|$ with the
increasing of $Z$ and $N$ is observed. The relation between isoscaling
parameter and the change of isospin content is demonstrated. In addition, the
disappearance of the isospin effect of projectile fragmentation is also
discussed in the viewpoint of isoscaling parameter.


title:
Anisotropy of flow and the order of phase transition in relativistic
  heavy ion collisions

abstract:
  Using a hydrodynamical model we study how the order of phase transition in
the equation of state of strongly interacting matter affects single particle
spectra, elliptic flow and higher order anisotropies in Au+Au collisions at
RHIC (sqrt{s_NN}=200 GeV energy). We find that the single particle spectra are
independent of the order of phase transition and that the fourth harmonic
v_4(p_T) shows only a weak dependence in the p_T region where hydrodynamics is
expected to work. The differential elliptic flow, v_2(p_T), of baryons shows
the strongest dependence on equation of state. Surprisingly the closest fit to
data was obtained when the equation of state had a strong first order phase
transition and a lattice inspired equation of state fits the data as badly as a
purely hadronic equation of state.


title: Matter formed at the BNL relativistic heavy ion collider

abstract:
  We suggest that the "new form of matter" found just above $T_c$ by RHIC is
made up of tightly bound quark-antiquark pairs, essentially 32 chirally
restored (more precisely, nearly massless) mesons of the quantum numbers of
$\pi$, $\sigma$, $\rho$ and $a_1$. Taking the results of lattice gauge
simulations (LGS) for the color Coulomb potential from the work of the
Bielefeld group and feeding this into a relativistic two-body code, after
modifying the heavy-quark lattice results so as to include the
velocity-velocity interaction, all ground-state eigenvalues of the 32 mesons go
to zero at $T_c$ just as they do from below $T_c$ as predicted by the vector
manifestation (VM in short) of hidden local symmetry. This could explain the
rapid rise in entropy up to $T_c$ found in LGS calculations. We argue that how
the dynamics work can be understood from the behavior of the hard and soft
glue.


title: Re-appearance of the pairing correlations at finite temperature

abstract:
  Rotational and deformation dependence of isovector and isoscalar pairing
correlations at finite temperature are studied in an exactly solvable cranked
deformed shell model Hamiltonian. It is shown that isovector pairing
correlations, as expected, decrease with increasing deformation and the
isoscalar pairing correlations remain constant at temperature, T=0. However, it
is observed that at finite temperature both isovector and isoscalar pairing
correlations are enhanced with increasing deformation, which contradict the
mean-field predictions. It is also demonstrated that the pair correlations,
which are quenched at T=0 and high rotational frequency re-appear at finite
temperature. The changes in the individual multipole pairing fields as a
function of rotation and deformation are analyzed in detail.


title:
Precision calculation of $\gamma d\to \pi^+ nn$ within chiral
  perturbation theory

abstract:
  The reaction $\gamma d\to \pi^+ nn$ is calculated up to order $\chi^{5/2}$ in
chiral perturbation theory, where $\chi$ denotes the ratio of the pion to the
nucleon mass. Special emphasis is put on the role of nucleon--recoil
corrections that are the source of contributions with fractional power in
$\chi$. Using the known near threshold production amplitude for $\gamma p\to
\pi^+ n$ as the only input, the total cross section for $\gamma d\to \pi^+ nn$
is described very well. A conservative estimate suggests that the theoretical
uncertainty for the transition operator amounts to 3 % for the computed
amplitude near threshold.


title: A short remark on the velocities of neutrinos

abstract:
  An attempt is made to estimate the velocity $V_{\nu}$ of electron
antineutrino by using a theory of nuclear reactions \cite{1}. To estimate it,
the experimental values of absorption cross sections $\mathbf{\sigma}%
_{a}(\widetilde{\nu}_{e})$ and $\mathbf{\sigma}_{a}(n)$ for electron
antineutrinos and neutrons by nuclei are compared. Based on the approach
proposed below, one could assume that the maximum velocity at weak interactions
$c_{w}>c,$ which is inconsistent with the theory of relativity (TR)


title: Quasi-inertial ellipsoidal flows in relativistic hydrodynamics

abstract:
  We search for non-trivial relativistic solutions of the hydrodynamic
equations with quasi-inertial flows such as in the Bjorken-like models. The
problem is analyzed in general and the known results are reproduced by a method
proposed. A new class of 3D anisotropic analytic solutions with quasi-inertial
property is found. An ellipsoidal generalization of the spherically symmetric
Hubble flow with constant pressure is proposed as a particular case. The
relativistic expansion of finite systems into vacuum is also described within
this class. A region of applicability and possible utilization of the new
solutions for processes of A+A collisions is discussed.


title:
Space-Time Evolution of Hadronization in DIS: Semi-Exclusive Processes
  and Grey Track Production

abstract:
  Semi-exclusive processes and grey track production in DIS off nuclear targets
are analyzed as possible tools to investigate the space time evolution of
hadronization.


title: A relativistic two-nucleon model for $A(p,K^+){_\Lambda}B$ reaction

abstract:
  We investigate the $A(p,K^+){_\Lambda}B$ reaction within a covariant two
nucleon model. We focus on amplitudes which are described by creation,
propagation and decay into relevant channel of $N^*$(1650), $N^*$(1710), and
$N^*$(1720) intermediate baryonic resonance states in the initial collision of
the projectile nucleon with one of its target counterparts. This collision is
modeled by the exchange of $\pi$ as well as $\rho$ and $\omega$ mesons. The
bound state nucleon and hyperon wave functions are obtained by solving the
Dirac equation with appropriate scalar and vector potentials. Expressions for
the reaction amplitudes are derived taking continuum particle wave functions in
both distorted wave and plane wave approximations. Detailed numerical results
are presented in the plane wave approximation; estimates of the effects of the
initial and final state interactions are given in the eikonal approximation.
Cross sections of 1 - 2 nb/sr at the peak positions, are obtained for favored
transitions in case of heavier targets.


title:
System size dependence of elliptic flows in relativistic heavy-ion
  collisions

abstract:
  The elliptic flows in both Cu+Cu and Au+Au collisions at the Relativistic
Heavy Ion Collider are studied in a multi-phase transport model. For both
collisions at same reduced impact parameter and minimum bias collisions, the
elliptic flow of partons in Cu+Cu collisions is about a factor of three smaller
than that in Au+Au collisions at same energy. The reduction factor is similar
to the ratio of the sizes of the two colliding systems and is also related to
the combined effects of initial energy density and spatial elliptic deformation
in the two reactions. A similar system size dependence is also seen in the
elliptic flow of charged hadrons from minimum bias collisions.


title: HBT search for new states of matter in A+A collisions

abstract:
  A method allowing studies of the hadronic matter at the early evolution stage
in A+A collisions is developed. It is based on an interferometry analysis of
approximately conserved values such as the averaged phase-space density (APSD)
and the specific entropy of thermal pions. The plateau found in the APSD
behavior vs collision energy at SPS is associated, apparently, with the
deconfinement phase transition at low SPS energies; a saturation of this
quantity at the RHIC energies indicates the limiting Hagedorn temperature for
hadronic matter. It is shown that if the cubic power of effective temperature
of pion transverse spectra grows with energy similarly to the rapidity density
(that is roughly consistent with experimental data), then the interferometry
volume is inverse proportional to the pion APSD that is about a constant
because of limiting Hagedorn temperature. This sheds light on the HBT puzzle.


title: Understanding low energy reaction with exotic nuclei

abstract:
  Recent developments on the understanding of low energy reactions are
highlighted. Emphasis is given to the CDCC framework where the breakup channels
of the projectile are included explicitly. Properties of the breakup couplings
are presented. Comments are given with regard to the separation between the
nuclear and the Coulomb contributions to breakup cross sections as well as the
dependence on the optical potentials. A discussion on the sensitivity of the
CDCC basis is discussed, by comparing pure breakup results with transfer to the
continuum calculations. Finally, some remaining controversies show the need to
go beyond the single particle picture for the projectile.


title: Combined method to extract spectroscopic information

abstract:
  Spectroscopic factors (SF) play an important role in nuclear physics and
astrophysics. The traditional method of extracting SF from direct transfer
reactions suffers from serious ambiguities. We discuss a modified method which
is based on including the asymptotic normalization coefficient (ANC) of the
overlap functions into the transfer analysis. In the modified method the
contribution of the external part of the reaction amplitude, typically
dominant, is fixed and the SF is determined from fitting the internal part. We
illustrate the modified method with $(d,p)$ reactions on ${}^{208}{\rm Pb},
{}^{12}{\rm C}$, and ${}^{84}{\rm Se}$ targets at different energies. The
modified method allows one to extract the SF, which do not depend on the shape
of the single-particle nucleon-target interaction, and has the potential of
improving the reliability and accuracy of the structure information. This is
specially important for nuclei on dripline, where not much is known.


title: Polarized quark distributions in nuclear matter

abstract:
  We compute the polarized quark distribution function of a bound nucleon. The
Chiral Quark-Soliton model provides the quark and antiquark substructure of the
nucleon embedded in nuclear matter. Nuclear effects cause significant
modifications to the polarized distributions including an enhancement of the
axial coupling constant.


title: Hadron production from resonance decay in relativistic collisions

abstract:
  A statistical model for decay and formation of heavy hadronic resonances is
formulated. The resonance properties become increasingly uncertain with
increasing resonance mass. Drawing on analogy with the situation in low-energy
nuclear physics, we employ the Weisskopf approach to the resonance processes.
In the large-mass limit, the density of resonance states in mass is governed by
a universal Hagedorn-like temperature T_H. As resonances decay, progressively
more and more numerous lighter states get populated. For T_H \simeq 170 MeV,
the model describes data for the hadron yield ratios at the RHIC and SPS
energies under the extreme assumption of a single heavy resonance giving rise
to measured yields.


title: Critical line of the deconfinement phase transition

abstract:
  Phase diagram of strongly interacting matter is discussed within the exactly
solvable statistical model of the quark-gluon bags. The model predicts two
phases of matter: the hadron gas at a low temperature T and baryonic chemical
potential muB, and the quark-gluon gas at a high T and/or muB. The nature of
the phase transition depends on a form of the bag mass-volume spectrum (its
pre-exponential factor), which is expected to change with the muB/T ratio. It
is therefore likely that the line of the 1st} order transition at a high muB/T
ratio is followed by the line of the 2nd order phase transition at an
intermediate muB/T, and then by the lines of "higher order transitions" at a
low muB/T.


title:
Isospin Diffusion in Heavy-Ion Collisions and the Neutron Skin Thickness
  of Lead

abstract:
  The correlation between the thickness of the neutron skin in Pb-208, and the
degree of isospin diffusion in heavy-ion collisions is examined. The same
equation of state is used to compute the degree of isospin diffusion in an
isospin-depedent transport model and the neutron skin thickness in the
Hartree-Fock approximation. We find that skin thicknesses less than 0.15 fm are
excluded by the isospin diffusion data.


title:
Baryon-strangeness correlations: a diagnostic of strongly interacting
  matter

abstract:
  The correlation between baryon number and strangeness elucidates the nature
of strongly interacting matter, such as that formed transiently in high-energy
nuclear collisions. This diagnostic can be extracted theoretically from lattice
QCD calculations and experimentally from event-by-event fluctuations. The
analysis of present lattice results above the critical temperature severely
limits the presence of q-qbar bound states, thus supporting a picture of
independent (quasi)quarks.


title:
Production of complex particles in low energy spallation and in
  fragmentation reactions by in-medium random clusterization

abstract:
  Rules for in-medium complex particle production in nuclear reactions are
proposed. These rules have been implemented in two models to simulate
nucleon-nucleus and nucleus-nucleus reactions around the Fermi energy. Our work
emphasizes the effect of randomness in cluster formation, the importance of the
nucleonic Fermi motion as well as the role of conservation laws. The concepts
of total available phase-space and explored phase-space under constraint
imposed by the reaction are clarified. The compatibility of experimental
observations with a random clusterization is illustrated in a schematic
scenario of a proton-nucleus collision. The role of randomness under constraint
is also illustrated in the nucleus-nucleus case.


title:
Inhomogeneities in the freeze-out of relativistic heavy ion collisions
  at CERN SPS

abstract:
  We study the role of temperature and density inhomogeneities on the
freeze-out of relativistic heavy ion collisions at CERN SPS. Especially the
impact on the particle abundancies is investigated. The quality of the fits to
the measured particle ratios in 158 AGeV Pb+Pb collisions significantly
improves as compared to a homogeneous model.


title: Momentum spectra of charmonium produced in a quark-gluon plasma

abstract:
  We calculate rapidity and transverse momentum distributions of charmonium
formed in high energy heavy ion collsions from incoherent recombination of
charm quarks. The results are very sensitive to the corresponding distributions
of the charm quarks, and thus can serve as a probe of the state of matter
produced in the heavy ion collision. At one extreme we generate a set of charm
pair momenta directly from pQCD amplitudes, which are appropriate if one can
neglect interaction of the quarks with the medium. At the other extreme we
generate momenta of charm quarks in thermal equilibrium with the expanding
medium, appropriate for an extremely strong interaction. Explicit predictions
are made for J/Psi formation in Au-Au interactions at RHIC. We find that for
the case in which charm quark momenta are unchanged from the pQCD production
calculation, both the rapidity and transverse momentum spectra of the formed
J/Psi are substantially narrower than would be anticipated in scenarios which
do not include the in-medium formation. In particular, the average transverse
momentum of the J/Psi will exhibit a non-monotonic behavior in the progression
from p-p to p-A to A-A interactions.


title: Low energy 0+ excitations in 158Gd

abstract:
  High precision (p,t) studies of the deformed nucleus 158Gd allowed the
observation of 13 excited 0+ states below an excitation energy of 3.1 MeV. This
high density of low energy states, and particularly their measured B(E2)
transition strengths to the first excited 2+ state challenge nuclear models.
The pseudo SU(3) model, which successfully describes many excited bands in Dy
isotopes, is used to analyze this nuclei. We have fairly good reproduction of
most of the states but the absence of actively including nucleons occupying
intruders orbits may be the reason for the observed limitations of the model.


title: Degeneracies when only T=1 two-body interactions are present

abstract:
  In the nuclear f_7/2 shell, the nucleon-nucleon interaction can be
represented by the eight values E(J)=<(f^2_{7/2})^J |V| (f^2_{7/2})^J>,
J=0,1,...,7, where for even J the isospin is 1, and for odd J it is 0. If we
set the T=0 (odd J) two-body matrix elements to 0 (or to a constant), we find
several degeneracies which we attempt to explain in this work. We also give
more detailed expressions than previously for the energies of the states in
question. New methods are used to explain degeneracies that are found in {45}Ti
(I=25/2- and 27/2-), {46}V (I=12^+_1 and 13^+_1, as well as I=13^+_2 and 15+),
and {47}V (I=29/2- and 31/2-).


title:
Determination of \pi^0 meson quadrupole polarizabilities from the
  process \gamma\gamma -> \pi^0\pi^0

abstract:
  A fit of the experimental data to the total cross section of the process
\gamma\gamma->\pi^0\pi^0 in the energy region from 270 to 2250 MeV has been
carried out using dispersion relations for the invariant amplitudes where the
quadrupole polarizabilities are free parameters. As a result the sum and
difference of the electric and magnetic quadrupole polarizabilities of the
\pi^0 meson have been found for the first time:
(\alpha2+\beta2)_\pi^0=(-0.181+-0.004)*10^{-4}fm^5,
(\alpha2-\beta2)_pi^0=(39.70+-0.02)*10^{-4}fm^5. In addition, dispersion sum
rules have been constructed for this sum and difference, respectively. The
values of (\alpha2-\beta2)_\pi^0 and (\alpha2+\beta2)_\pi^0 extracted from the
experimental data on the process \gamma\gamma->\pi^0\pi^0 are in good agreement
with the result of calculations in the framework of these dispersion sum rules.


title:
Dynamics of the Landau-Pomeranchuk-Migdal Effect in Au+Au Collisions at
  200 AGeV

abstract:
  We study the role played by the Landau-Pomeranchuk-Midgal (LPM) effect in
relativistic collisions of hadrons and heavy nuclei, within a parton cascade
model. We find that the LPM effect strongly affects the gluon multiplication
due to radiation and considerably alters the space-time evolution of the
dynamics of the collision. It ensures a multiplicity distribution of hadrons in
aggreement with the experimental proton-proton data. We study the production of
single photons in relativistic heavy ion collisions and find that the inclusion
of LPM suppression leads to a reduction in the single photon yield at small and
intermediate transverse momenta. The parton cascade calculation of the single
photon yield including the LPM effect is shown to be in good agreement with the
recent PHENIX data taken at the Relativistic Heavy-Ion Collider.


title: Higher Twist Effects in Parton Fragmentation Functions

abstract:
  We study twist expansions for parton fragmentation functions based on the
definition of the twist as an invariant matrix element of a light-cone, bilocal
operator. The results are then applied to a method which might be used to
extract higher twist effects in the fragmentation sector using both $e^+ e^-$,
and $e^- p$ collisions. We discuss how to apply the later measurements to
experiments at the Jefferson National Acceleration Facility.


title:
Effect of space-momentum correlations on the constituent quark number
  scaling of hadron elliptic flows

abstract:
  Using models ranging from schematic one with a simple quark distribution to
more realistic blast wave, we study the elliptic flow of hadrons produced from
coalescence of quarks and antiquarks in the quark-gluon plasma that is formed
in ultrarelativistic heavy ion collisions. In particular, we study effects due
to azimuthal anisotropy in the local transverse momentum distribution of
quarks, as generated by their position-momentum correlations as a result of
radial flow and/or jet quenching. We find that even if quarks have large local
non-elliptic anisotropic flow, the elliptic flow of produced hadrons can still
scale with their constituent quark numbers. This scaling is, however, broken if
the radial flow of coalescing quarks is anisotropic and/or if the momentum
dispersion of quarks inside hadrons is included.


title: Isospin Asymmetry in Nuclei, Neutron Stars, and Heavy-Ion Collisions

abstract:
  The roles of isospin asymmetry in nuclei and neutron stars are investigated
using a range of potential and field-theoretical models of nucleonic matter.
The parameters of these models are fixed by fitting the properties of
homogeneous bulk matter and closed-shell nuclei. We discuss and unravel the
causes of correlations among the neutron skin thickness in heavy nuclei, the
pressure of beta-equilibrated matter at a density of 0.1 fm$^{-3}$, and the
radii of moderate mass neutron stars. The influence of symmetry energy on
observables in heavy-ion collisions is summarized.


title: Finite size effects on kaonic pasta structures

abstract:
  Non-uniform structures of mixed phases at the first-order phase transition to
charged kaon condensation are studied using a density functional theory within
the relativistic mean field model. Including electric field effects and
applying the Gibbs conditions in a proper way, we numerically determine density
profiles of nucleons, electrons and condensed kaons. Importance of charge
screening effects is elucidated and thereby we show that the Maxwell
construction is effectively justified. Surface effect is also studied to figure
out its effect on the density profiles.


title: Collective motion in finite Fermi systems within Vlasov dynamics

abstract:
  A semiclassical theory of linear response in finite Fermi systems, based on
the Vlasov equation, and its applications to the study of isoscalar vibrations
in heavy nuclei are reviewed. It is argued that the Vlasov equation can be used
to study the response of small quantum systems like (heavy) nuclei in regimes
for which the finite size of the system is more important than the collisions
between constituents. This requires solving the linearized Vlasov equation for
finite systems, however, in this case the problem of choosing appropriate
boundary conditions for the fluctuations of the phase-space-density is
non-trivial. Calculations of the isoscalar response functions performed by
using different boundary conditions, corresponding to fixed and moving nuclear
surface, are compared for different multipoles and it is found that, in a
sharp-surface model, the moving-surface boundary conditions give better
agreement with experiment. The semiclassical strength functions given by this
theory are strikingly similar to the results of analogous quantum calculations,
in spite of the fact that shell effects are not included in the theory, this
happens because of a well known close relation between classical trajectories
and shell structure.


title:
Six-dimensional Davidson potential as a dynamical symmetry of the
  symplectic Interacting Vector Boson Model

abstract:
  A six-dimensional Davidson potential, introduced within the framework of the
Interacting Vector Boson Model (IVBM), is used to describe nuclei that exhibit
transitional spectra between the purely rotational and vibrational limits of
the theory. The results are shown to relate to a new dynamical symmetry that
starts with the $Sp(12,R) \supset SU(1,1) \times SO(6)$ reduction. Exact
solutions for the eigenstates of the model Hamiltonian in the basis defined by
a convenient subgroup chain of SO(6) are obtained. A comparison of the
theoretical results with experimental data for heavy nuclei with transitional
spectra illustrates the applicability of the theory.


title:
Induced Polarization in the $^2$H($\gamma,\vec n$)$^1$H Reaction at Low
  Energy

abstract:
  The induced polarization, $P^\prime_y$, of the neutron in the deuteron
photo-disintegration from threshold up to 30 MeV is calculated using a variety
of different, latest-generation potentials--Argonne $v_{18}$, Bonn 2000, and
Nijmegen I-- and a realistic model for the nuclear electromagnetic current
operator, including one- and two-body terms. The model dependence of the
theoretical predictions is found to be very small. These predictions are
systematically larger in magnitude than the measured $P^\prime_y$ values, and
corroborate the conclusions of an earlier, and much older, study. There is
considerable scatter in the available experimental data. New and more accurate
measurements of the induced polarization in the $^2$H($\gamma,\vec n$)$^1$H
reaction are needed in order to establish unequivocally whether there is a
discrepancy between theory and experiment.


title: Microscopic Description of Super Heavy Nuclei

abstract:
  The results of extensive microscopic Relativistic Mean Field (RMF)
calculations for the nuclei appearing in the alpha - decay chains of recently
discovered superheavy elements with Z = 109 to 118 are presented and discussed.
The calculated ground state properties like total binding energies, Q values,
deformations, radii and densities closely agree with the corresponding
experimental data, where available. The double folding (t-rho-rho)
approximation is used to calculate the interaction potential between the
daughter and the alpha, using RMF densities along with the density dependent
nucleon - nucleon interaction (M3Y). This in turn, is employed within the WKB
approximation to estimate the half lives without any additional parameter for
alpha - decay. The half lives are highly sensitive to the Q values used and
qualitatively agree with the corresponding experimental values. The use of
experimental Q values in the WKB approximation improves the agreement with the
experiment, indicating that the resulting interaction potential is reliable and
can be used with confidence as the real part of the optical potential in other
scattering and reaction processes.


title:
A covariant model of the electromagnetic current for the study of
  two-body scalar systems

abstract:
  We present a procedure to derive a covariant electromagnetic current operator
for a system made up by two scalars constituents. Using different wave
functions we fitted their parameters to the experimental data of the pion form
factor, obtainig great discrepancy at low momentum transfer. Introducing the
Vector Meson Dominance corrective factor, we obtained a better fit to the data.


title:
Quantum Gases in the Microcanonical Ensemble near the Thermodynamic
  Limit

abstract:
  A new method is proposed for a treatment of ideal quantum gases in the
microcanonical ensemble near the thermodynamic limit. The method allows
rigorous asymptotic calculations of the average number of particles and
particle number fluctuations in the microcanonical ensemble. It gives also the
finite-volume corrections due to exact energy conservation for the total
average number of particles and for higher moments of the particle number
distribution in a system approaching the thermodynamic limit. A present
consideration confirms our previous findings that the scaled variance for
particle number fluctuations in the microcanonical ensemble is different from
that in the grand canonical ensemble even in the thermodynamic limit.


title:
Nuclear Electromagnetic Current in the Relativistic Approach with the
  Momentum-Dependent Selfenergies

abstract:
  We define the new description of the electromagnetic current to hold the
current conservation in the momentum-dependent Dirac fields from the Ward
Takahashi identity. To describe the momentum-dependence we solve the
relativistic Hartree-Fock approximation by using the one-pion exchange. In
addition we discuss on contribution from the one-pion exchange current and the
core polarization. It is shown that this current can reduce the convection
current in the isovector case, whose value has been too big due to the small
effective mass in the usual relativistic Hartree approximation.


title:
Determination of the parameters of a Skyrme type effective interaction
  using the simulated annealing approach

abstract:
  We implement for the first time the simulated annealing method (SAM) to the
problem of searching for the global minimum in the hyper-surface of the
chi-square function which depends on the values of the parameters of a Skyrme
type effective nucleon-nucleon interaction. We undertake a realistic case of
fitting the values of the Skyrme parameters to an extensive set of experimental
data on the ground state properties of many nuclei ranging from normal to
exotic ones. The set of experimental data used in our fitting procedure
includes the radii for the valence $1d_{5/2}$ and $1f_{7/2}$ neutron orbits in
the $^{17}$O and $^{41}$Ca nuclei, respectively, and the breathing mode
energies for several nuclei, in addition to the typically used data on binding
energy, charge radii and spin-orbit splitting. We also include in the fit the
critical density $\rho_{cr}$ and further constrain the values of the Skyrme
parameters by requiring that (i) the quantity $P = 3\rho \frac{dS}{d\rho}$,
directly related to the slope of the symmetry energy $S$, must be positive for
densities up to $3\rho_0$ (ii) the enhancement factor $\kappa$, associated with
the isovector giant dipole resonance, should lie in the range of $0.1 - 0.5$
and (iii) the Landau parameter $G_0^\prime$ is positive at $\rho = \rho_0$. We
provide simple but consistent schemes to account for the center of mass
corrections to the binding energy and charge radii.


title: Electron and Photon Scattering on Three-Nucleon Bound States

abstract:
  A big spectrum of processes induced by real and virtual photons on the 3He
and 3H nuclei is theoretically investigated through many examples based on
nonrelativistic Faddeev calculations for bound and continuum states. The modern
nucleon-nucleon potential AV18 together with the three-nucleon force UrbanaIX
is used. The single nucleon current is augmented by explicit pi- and rho-like
two-body currents which fulfill the current continuity equation together with
the corresponding parts of the AV18 potential. We also employ the Siegert
theorem, which induces many-body contributions to the current operator. The
interplay of these different dynamical ingredients in the various
electromagnetic processes is studied and the theory is compared to the
experimental data. Overall we find fair to good agreement but also cases of
strong disagreement between theory and experiment, which calls for improved
dynamics. In several cases we refer the reader to the work of other groups and
compare their results with ours. In addition we list a number of predictions
for observables in different processes which would challenge this dynamical
scenario even more stringently and systematically.


title:
Enhancement of nuclear Schiff moments and time reversal violation in
  atoms due to combination of soft nuclear octupole and quadrupole vibrations

abstract:
  Nuclear forces violating parity and time reversal invariance P,T-odd produce
P,T-odd nuclear moments, for example, the nuclear Schiff moment. In turn, this
moment can induce the electric dipole moment (EDM) in the atom. The
contribution to the Schiff moment from the soft collective quadrupole and
octupole vibrations in spherical nuclei is calculated in the framework of the
quasiparticle random phase approximation with separable quadrupole and octupole
forces. The values of nuclear Schiff moments predicted for odd 217-221Ra and
217-221Ra isotopes indicate a possibility of enhancement by a factor of 50 or
more as compared to the experimentally studied spherical nuclei 199Hg and
129Xe. Since the EDM in very heavy atoms, such as Ra, Rn, and Fr, has an
additional enhancement rapidly increasing with nuclear charge $Z$, the EDM
enhancement can exceed two orders of magnitude. We discuss the nuclear
structure effects causing an enhancement of the Schiff moment.


title: Tensor Glueball Photoproduction and Decay

abstract:
  Using vector meson dominance (VMD), tensor glueball photoproduction cross
sections, asymmetries and widths are calculated. The predicted hadronic VV'
decays are comparable for different vector meson (V = rho, omega and phi)
channels with the omega phi width the largest but the radiative omega gamma and
phi gamma decays are suppressed relative to rho gamma by over a factor of 2.
This decay profile is distinct from typical meson branching rates and may be a
useful glueball detection signature. Results are compared to a previous VMD
scalar glueball study.


title: Eta absorption by mesons

abstract:
  Using the $[SU(3)_{\mathrm{L}} \times SU(3)_{\mathrm{R}}]_{\mathrm{global}%
}\times [SU(3)_V]_{\mathrm{local}}$ chiral Lagrangian with hidden local
symmetry, we evaluate the cross sections for the absorption of eta meson ($%
\eta$) by pion ($\pi$), rho ($\rho$), omega ($\omega$), kaon ($K$), and kaon
star ($K^*$) in the tree-level approximation. With empirical masses and
coupling constants as well as reasonable values for the cutoff parameter in the
form factors at interaction vertices, we find that most cross sections are less
than 1 mb, except the reactions $\rho\eta\to K\bar K^*(\bar KK^*)$,
$\omega\eta\to K\bar K^*(\bar KK^*)$, $K^*\eta\to\rho K$, and $K^*\eta\to\omega
K$, which are a few mb, and the reactions $\pi\eta\to K\bar K$ and $K\eta\to\pi
K$, which are more than 10 mb. Including these reactions in a kinetic model
based on a schematic hydrodynamic description of relativistic heavy ion
collisions, we find that the abundance of eta mesons likely reaches chemical
equilibrium with other hadrons in nuclear collisions at the Relativistic Heavy
Ion Collider.


title: The unitary-model-operator approach to nuclear many-body problems

abstract:
  Microscopic nuclear structure calculations have been performed within the
framework of the unitary-model-operator approach. Ground-state and
single-particle energies are calculated for nuclei around ^{14}C, ^{16}O and
^{40}Ca with modern nucleon-nucleon interactions.


title:
New Treatment of Resonances with Bound State Approximation by Using
  Pseudo Potential

abstract:
  We propose a new approach to extract the wave functions of resonances by the
bound state approximation which gives the mixed states of the resonance
components and the continuum ones. In our approach, on the basis of the method
of analytic continuation in the coupling constant (ACCC), we construct Pad\'e
rational function by adopting the positive energies as well as the negative
ones. We report the result of the application of this new method to the second
$2^+$ state of $^{12}$C which was studied with the ACCC method in our previous
work. It is found that the resonance parameters obtained by the ACCC method are
well reproduced by the new method. Some advantages over the ACCC method are
also shown.


title:
On kaonic hydrogen. Phenomenological quantum field theoretic model
  revisited

abstract:
  We argue that due to isospin and U-spin invariance of strong low-energy
interactions the S-wave scattering lengths a^0_0 and a^1_0 of bar-KN scattering
with isospin I=0 and I = 1 satisfy the low-energy theorem a^0_0 + 3 a^1_0 = 0
valid to leading order in chiral expansion. In the model of strong low-energy
bar-KN interactions at threshold (EPJA 21,11 (2004)) we revisit the
contribution of the Sigma(1750) resonance, which does not saturate the
low-energy theorem a^0_0 + 3 a^1_0 = 0, and replace it by the baryon background
with properties of an SU(3) octet. We calculate the S-wave scattering
amplitudes of K^-N and K^-d scattering at threshold. We calculate the energy
level displacements of the ground states of kaonic hydrogen and kaonic
deuterium. The result obtained for kaonic hydrogen agrees well with recent
experimental data by the DEAR Collaboration. We analyse the cross sections for
elastic and inelastic K^-p scattering for laboratory momenta of the incident
K^- meson from the domain 70 MeV/c < p_K < 150 MeV/c. The theoretical results
agree with the available experimental data within two standard deviations.


title:
Target Normal Spin Asymmetry of the Elastic ep-Scattering at Resonance
  Energy

abstract:
  We study the target normal spin asymmetry for the reaction $ep \to ep$ at
electron energy up to few GeV in the laboratory frame. The asymmetry is
proportional to the imaginary part of the reaction scattering amplitude. To
estimate the imaginary part of the amplitude we use the unitarity relation and
saturate the intermediate hadron states by the proton and resonances from the
first, second and third resonance regions. The resonance electromagnetic
transition amplitudes, needed to evaluate the asymmetry, are taken from
experiment.


title:
Matrix Elements and Few-Body Calculations within the Unitary Correlation
  Operator Method

abstract:
  We employ the Unitary Correlation Operator Method (UCOM) to construct
correlated, low-momentum matrix elements of realistic nucleon-nucleon
interactions. The dominant short-range central and tensor correlations induced
by the interaction are included explicitly by an unitary transformation. Using
correlated momentum-space matrix elements of the Argonne V18 potential, we show
that the unitary transformation eliminates the strong off-diagonal
contributions caused by the short-range repulsion and the tensor interaction,
and leaves a correlated interaction dominated by low-momentum contributions. We
use correlated harmonic oscillator matrix elements as input for no-core shell
model calculations for few-nucleon systems. Compared to the bare interaction,
the convergence properties are dramatically improved. The bulk of the binding
energy can already be obtained in very small model spaces or even with a single
Slater determinant. Residual long-range correlations, not treated explicitly by
the unitary transformation, can easily be described in model spaces of moderate
size allowing for fast convergence. By varying the range of the tensor
correlator we are able to map out the Tjon line and can in turn constrain the
optimal correlator ranges.


title:
Three-body continuum discretization in a basis of transformed harmonic
  oscillator states

abstract:
  The inclusion of the continuum in the study of weakly-bound three-body
systems is discussed. A transformed harmonic oscillator basis is introduced to
provide an appropriate discrete and finite basis for treating the continuum
part of the spectrum. As examples of the application of the method the strength
functions corresponding to several operators that couple the ground state to
the continuum are investigated, for 6He, and compared with previous
calculations. It is found that the energy moments of these distributions are
accurately reproduced with a small basis set.


title: Soft-core meson-baryon interactions. I. One-hadron-exchange potentials

abstract:
  The Nijmegen soft-core model for the pseudoscalar-meson baryon interaction is
derived, analogous to the Nijmegen NN and YN models. The interaction
Hamiltonians are defined and the resulting amplitudes for one-meson-exchange
and one-baryon-exchange in momentum space are given for the general mass case.
The partial wave projection is carried through and explicit expressions for the
momentum space partial wave meson-baryon potentials are presented.


title: Soft-core meson-baryon interactions. II. $\pi N$ and $K^+ N$ scattering

abstract:
  The $\pi N$ potential includes the t-channel exchanges of the scalar-mesons
$\sigma$ and f_0, vector-meson $\rho$, tensor-mesons f_2 and f_2' and the
Pomeron as well as the s- and u-channel exchanges of the nucleon N and the
resonances $\Delta$, Roper and S_{11}. These resonances are not generated
dynamically. We consider them as, at least partially, genuine three-quark
states and we treat them in the same way as the nucleon. The latter two
resonances were needed to find the proper behavior of the phase shifts at
higher energies in the corresponding partial waves. The soft-core $\pi N$-model
gives an excellent fit to the empirical $\pi N$ S- and P-wave phase shifts up
to T_{lab}=600 MeV. Also the scattering lengths have been reproduced well and
the soft-pion theorems for low-energy $\pi N$ scattering are satisfied. The
soft-core model for the $K^+ N$ interaction is an SU_f(3)-extension of the
soft-core $\pi N$-model. The $K^+ N$ potential includes the t-channel exchanges
of the scalar-mesons a_0, $\sigma$ and f_0, vector-mesons $\rho$, $\omega$ and
$\phi$, tensor-mesons a_2, f_2 and f_2' and the Pomeron as well as u-channel
exchanges of the hyperons $\Lambda$ and $\Sigma$. The fit to the empirical $K^+
N$ S-, P- and D-wave phase shifts up to T_{lab}=600 MeV is reasonable and
certainly reflects the present state of the art. Since the various $K^+ N$
phase shift analyses are not very consistent, also scattering observables are
compared with the soft-core $K^+ N$-model. A good agreement for the total and
differential cross sections as well as the polarizations is found.


title: Fixing Two-Nucleon Weak-Axial Coupling L_{1,A} From mu-d Capture

abstract:
  We calculate the muon capture rate on the deuteron to next-to-next-to-leading
order in the pionless effective field theory. The result can be used to
constrain the two-nucleon isovector axial coupling L_{1,A} to +/- 2 fm^3 if the
muon capture rate is measured to 2% level. From this, one can determine the
neutrino-deuteron break up reactions and the pp-fusion cross section in the sun
to a same level of accuracy.


title: Ellipsoidal flows in relativistic hydrodynamics of finite systems

abstract:
  A new class of 3D anisotropic analytic solutions of relativistic
hydrodynamics with constant pressure is found. We analyse, in particular,
solutions corresponding to ellipsoidally symmetric expansion of finite systems
into vacuum. They can be utilized for relativistic description of the system
evolution in thermodynamic region near the softest point and at the final stage
of the hydrodynamic expansion in A+A collisions. The solutions can be used also
for testing of numerical hydrodynamic codes solving relativistic hydrodynamic
equations for anisotropic expansion of finite systems


title: Isospin splitting of the nucleon mean field

abstract:
  The isospin splitting of the nucleon mean field is derived from the Brueckner
theory extended to asymmetric nuclear matter. The Argonne V18 has been adopted
as bare interaction in combination with a microscopic three body force. The
isospin splitting of the effective mass is determined from the
Brueckner-Hartree-Fock self-energy: It is linear acording to the Lane ansatz
and such that $m^*_n > m^*_p$ for neutron-rich matter. The symmetry potential
is also determined and a comparison is made with the predictions of the
Dirac-Brueckner approach and the phenomenological interactions. The theoretical
predictions are also compared with the empirical parametrizations of neutron
and proton optical-model potentials based on the experimental nucleon-nucleus
scattering and the phenomenological ones adopted in transport-model simulations
of heavy-ion collisions. The direct contribution of the rearrangement term due
to three-body forces to the single particle potential and symmetry potential is
discussed.


title:
The Ramsauer model for the total cross sections of neutron nucleus
  scattering

abstract:
  Theoretical study of systematics of neutron scattering cross sections on
various materials for neutron energies up to several hundred MeV are of
practical importance. In this paper, we analysed the experimental neutron
scattering total cross sections from 20MeV to 550MeV using Ramsauer model for
nuclei ranging from Be to Pb.


title: Renormalization of One-Pion Exchange and Power Counting

abstract:
  The renormalization of the chiral nuclear interactions is studied. In leading
order, the cutoff dependence is related to the singular tensor interaction of
the one-pion exchange potential. In S waves and in higher partial waves where
the tensor force is repulsive this cutoff dependence can be absorbed by
counterterms expected at that order. In the other partial waves additional
contact interactions are necessary. The implications of this finding for the
effective-field-theory program in nuclear physics are discussed.


title: A dynamical model for pion electroproduction on the nucleon

abstract:
  We develop a Lorenz- and gauge-invariant dynamical model for pion
electroproduction in the resonance region. The model is based on solving of the
Salpeter (instantaneous) equation for the pion-nucleon interaction with a
hadron-exchange potential. We find that the one-particle-exchange kernel of the
Salpeter equation for pion electroproduction develops an unphysical singularity
for a finite value of $Q^{2}$. We analyse two methods of dealing with this
problem. Results of our model are compared with recent single-polarization data
for pion electroproduction.


title: Study of hyperfine anomaly in $^9$Be within three-cluster model

abstract:
  The study of the hyperfine (hfs) anomaly in neutron rich nuclei can give a
very specific and unique way to study the neutron distribution and the
clustering structure. We study the sensitivity of the hfs anomaly to the
clustering effects in the 9Be isotope using two different nuclear wave
functions obtained in the three-cluster (alpha+alpha+n) model. The results are
compared to those obtained for 9,11Be in a two-body core + neutron model to
examine whether the hfs anomaly is sensitive to a halo structure in 11Be.


title: Time-dependent analysis of the nuclear and Coulomb dissociation of 11Be

abstract:
  The breakup of 11Be on carbon and lead targets around 70 MeV/nucleon is
investigated within a semiclassical framework. The role of the 5/2+ resonance
is analyzed in both cases. It induces a narrow peak in the nuclear-induced
breakup cross section, while its effect on Coulomb breakup is small. The
nuclear interactions between the projectile and the target is responsible for
the transition toward this resonant state. The influence of the parametrization
of the 10Be-n potential that simulates 11Be is also addressed. The breakup
calculation is found to be dependent on the potential choice. This leads us to
question the reliability of this technique to extract spectroscopic factors.


title: Strangeness production in proton-proton and proton-nucleus collisions

abstract:
  In these lectures we discuss the investigation of the strange meson
production in proton-proton ($pp$) and in proton-nucleus ($pA$) reactions
within an effective Lagrangian model. The kaon production proceeds mainly via
the excitations of $N^*$(1650), $N^*$(1710), and $N^*$(1720) resonant
intermediate nucleonic states, in the collision of two initial state nucleons.
Therefore, the strangeness production is expected to provide information about
the resonances lying at higher excitation energies. For beam energies very
close to the kaon production threshold the hyperon-proton final state
interaction effects are quite important. Thus, these studies provide a check on
the models of hyperon-nucleon interactions. The in-medium production of kaons
show strong sensitivity to the self energies of the intermediate mesons.


title:
Low-energy dipole excitations towards the proton drip-line: doubly magic
  48Ni

abstract:
  The properties of the low-energy dipole response are investigated for the
proton-rich doubly magic nucleus $^{48}$Ni, in a comparative study of two
microscopic models: fully self-consistent Relativistic Random-Phase
Approximation(RRPA) based on the novel density-dependent meson-exchange
interactions, and Continuum Random-Phase Approximation(CRPA) using Skyrme-type
interactions with the continuum properly included. Both models predict the
existence of the low-energy soft mode, i.e. the proton pygmy dipole resonance
(PDR), for which the transition densities and RPA amplitudes indicate the
dynamics of loosely bound protons vibrating against the rest of the nucleons.
The CRPA analysis indicates that the escape width for the proton PDR is rather
large, as a result of the coupling to the continuum.


title:
Removal of Spurious Admixture in a Self-consistent Theory of Adiabatic
  Large Amplitude Collective Motion

abstract:
  In this article we analyse, for a simple model, the properties of a practical
implementation of a fully self-consistent theory of adiabatic large-amplitude
collective motion using the local harmonic approach. We show how we can deal
with contaminations arising from spurious modes, caused by standard simplifying
approximations. This is done both at zero and finite angular momentum. We
analyse in detail the nature of the collective coordinate in regions where they
cross spurious modes and mixing is largest.


title:
Continuum-discretized coupled-channels method for four-body breakup
  reactions

abstract:
  Development of the method of CDCC (Continuum-Discretized Coupled-Channels)
from the level of three-body CDCC to that of four-body CDCC is reviewed.
Introduction of the pseudo-state method based on the Gaussian expansion method
for discretizing the continuum states of two-body and three-body projectiles
plays an essential role in the development. Furthermore, introduction of the
complex-range Gaussian basis functions is important to improve the CDCC for
nuclear breakup so as to accomplish that for Coulomb and nuclear breakup. A
successful application of the four-body CDCC to $^6$He+$^{12}$C scattering at
18 and 229.8 MeV is reported.


title: Summary of theoretical contributions

abstract:
  Results from various theoretical approaches and ideas presented at this
exciting meeting are reviewed. I also point towards future directions, in
particular hydrodynamic behaviour induced by jets traveling through the
quark-gluon plasma, which might be worth looking at in more detail.


title:
Neutron stars and strange stars in the chiral SU(3) quark mean field
  model

abstract:
  We investigate the equations of state for pure neutron matter and strange
hadronic matter in $\beta$-equilibrium, including $\Lambda$, $\Sigma$ and $\Xi$
hyperons. The masses and radii of pure neutron stars and strange hadronic stars
are obtained. For a pure neutron star, the maximum mass is about $1.8
M_{\mathrm{sun}}$, while for a strange hadronic star, the maximum mass is
around $1.45 M_{\mathrm{sun}}$. The typical radii of pure neutron stars and
strange hadronic stars are about 11.0-12.3 km and 10.7-11.7 km, respectively.


title:
Incoherent pion photoproduction on the deuteron with polarization
  observables I: Formal expressions

abstract:
  Formal expressions are developed for the general five-fold differential cross
section of incoherent $\pi$-photoproduction on the deuteron including beam and
target polarization. The polarization observables of the cross section are
described by various beam, target and beam-target asymmetries for polarized
photons and/or polarized deuterons. They are given as bilinear hermitean forms
in the reaction matrix elements divided by the unpolarized cross section. In
addition, the corresponding observables for the semi-exclusive reaction $\vec
d(\vec \gamma,\pi)NN$ are also given.


title:
Microscopic calculations of spin polarized neutron matter at finite
  temperature

abstract:
  The properties of spin polarized neutron matter are studied both at zero and
finite temperature within the framework of the Brueckner--Hartree--Fock
formalism, using the Argonne v18 nucleon-nucleon interaction. The free energy,
energy and entropy per particle are calculated for several values of the spin
polarization, densities and temperatures together with the magnetic
susceptibility of the system. The results show no indication of a ferromagnetic
transition at any density and temperature.


title:
Isospin and symmetry energy effects on nuclear fragment production in
  liquid-gas type phase transition region

abstract:
  We have demonstrated that the isospin of nuclei influences the fragment
production during the nuclear liquid-gas phase transition. Calculations for
Au197, Sn124, La124 and Kr78 at various excitation energies were carried out on
the basis of the statistical multifragmentation model (SMM). We analyzed the
behavior of the critical exponent tau with the excitation energy and its
dependence on the critical temperature. Relative yields of fragments were
classified with respect to the mass number of the fragments in the transition
region. In this way, we have demonstrated that nuclear multifragmentation
exhibits a 'bimodality' behavior. We have also shown that the symmetry energy
has a small influence on fragment mass distribution, however, its effect is
more pronounced in the isotope distributions of produced fragments.


title:
Incoherent pion photoproduction on the deuteron with polarization
  observables II: Influence of final state rescattering

abstract:
  Incoherent pion photoproduction on the deuteron is studied for photon
energies from threshold up to 1 GeV with special emphasis on polarization
observables. The elementary $\gamma N\to\pi N$ amplitude is taken from the MAID
model. The influence of final state interactions on total and semi-exclusive
cross sections $\vec d(\vec\gamma,\pi)NN$ is investigated by including complete
rescattering in the final $NN$- and $\pi N$-subsystems. For charged
pion-production the influence of $NN$-rescattering is moderate whereas $\pi
N$-rescattering is almost negligible. Much stronger influences of
$NN$-rescattering are seen in neutral pion production, which is due to the
elimination of a significant spurious coherent contribution in the impulse
approximation. Sizeable effects are also found in some of the beam, target and
beam-target asymmetries of the differential cross section.


title: The Juelich hyperon-nucleon model revisited

abstract:
  A one-boson-exchange model for the hyperon-nucleon (\Lambda N, \Sigma N)
interaction is presented. The model incorporates the standard one boson
exchanges of the lowest pseudoscalar and vector meson multiplets with coupling
constants fixed by SU(6) flavor symmetry relations. As the main new feature of
the model, the contributions in the scalar--isoscalar (\sigma) and
vector--isovector (\rho) exchange channels are now constrained by a microscopic
model of correlated \pi\pi and K \bar K exchange. Additional short-ranged
ingredients of the model in the scalar--isovector (a_0) and scalar--isospin-1/2
(\kappa) channels are likewise viewed as arising from meson-meson correlations
but are treated phenomenologically. With this model a satisfactory reproduction
of the available hyperon-nucleon data can be achieved.


title: $\eta$-meson in nuclear matter

abstract:
  The $\eta$-nucleon ($\eta$N) interactions are deduced from the heavy baryon
chiral perturbation theory up to the next-to-leading-order terms. Combining the
relativistic mean-field theory for nucleon system, we have studied the
in-medium properties of $\eta$-meson. We find that all the elastic scattering
$\eta$N interactions come from the next-to-leading-order terms. The $\eta $N
sigma term is found to be about 280$\pm$130 MeV. The off-shell terms are also
important to the in-medium properties of $\eta$-meson. On application of the
latest determination of the $\eta$N scattering length, the ratio of
$\eta$-meson effective mass to its vacuum value is near $0.84\pm0.015$, while
the optical potential is about $-(83\pm5)$ MeV, at the normal nuclear density.


title: Medium modifications of nucleon electromagnetic form factors

abstract:
  We use the Nambu-Jona-Lasinio model as an effective quark theory to
investigate the medium modifications of the nucleon electromagnetic form
factors. By using the equation of state of nuclear matter derived in this
model, we discuss the results based on the naive quark-scalar diquark picture,
the effects of finite diquark size, and the meson cloud around the constituent
quarks. We apply this description to the longitudinal response function for
quasielastic electron scattering. RPA correlations, based on the
nucleon-nucleon interaction derived in the same model, are also taken into
account in the calculation of the response function.


title:
Giant resonances in exotic spherical nuclei within the RPA approach with
  the Gogny force

abstract:
  Theoretical results for giant resonances in the three doubly magic exotic
nuclei $^{78}$Ni, $^{100}$Sn and $^{132}$Sn are obtained from Hartree-Fock (HF)
plus Random Phase Approximation (RPA) calculations using the D1S
parametrization of the Gogny two-body effective interaction. Special attention
is paid to full consistency between the HF field and the RPA particle-hole
residual interaction. The results for the exotic nuclei, on average, appear
similar to those of stable ones, especially for quadrupole and octupole states.
More exotic systems have to be studied in order to confirm such a trend. The
low energy of the monopole resonance in $^{78}$Ni suggests that the compression
modulus in this neutron rich nucleus is lower than the one of stable ones.


title:
The Fubini-Furlan-Rosetti sum rule and related aspects in light of
  covariant baryon chiral perturbation theory

abstract:
  We analyze the Fubini-Furlan-Rosetti sum rule in the framework of covariant
baryon chiral perturbation theory to leading one-loop accuracy and including
next-to-leading order polynomial contributions. We discuss the relation between
the subtraction constants in the invariant amplitudes and certain low-energy
constants employed in earlier chiral perturbation theory studies of threshold
neutral pion photoproduction off nucleons. In particular, we consider the
corrections to the sum rule due to the finite pion mass and show that below the
threshold they agree well with determinations based on fixed-t dispersion
relations. We also discuss the energy dependence of the electric dipole
amplitude E_{0+}.


title: Theoretical Description of the pd -> pd eta Reaction Near Threshold

abstract:
  The contributions of three different types of driving terms are included in
the estimation of the pd -> pd eta reaction at low energies. Near threshold, it
is predicted that a two-step model involving an intermediate pion should be the
most important but, as the energy approaches the threshold for eta production
in the free nucleon--nucleon reaction, a pick-up mechanism with a spectator
proton should become dominant. The total cross sections are underestimated by
about a factor of two compared to experimental data but the discrepancies in
the angular distributions are more serious, with no sign in the data for the
peaks corresponding to the pick--up diagram.


title: Detecting QGP with Charge Transfer Fluctuations

abstract:
  In this study, we analyze the recently proposed charge transfer fluctuations
within a finite pseudo-rapidity space. As the charge transfer fluctuation is a
measure of the local charge correlation length, it is capable of detecting
inhomogeneity in the hot and dense matter created by heavy ion collisions. We
predict that going from peripheral to central collisions, the charge transfer
fluctuations at midrapidity should decrease substantially while the charge
transfer fluctuations at the edges of the observation window should decrease by
a small amount. These are consequences of having a strongly inhomogeneous
matter where the QGP component is concentrated around midrapidity. We also show
how to constrain the values of the charge correlations lengths in both the
hadronic phase and the QGP phase using the charge transfer fluctuations.


title:
$\Delta$ resonance contribution to two-photon exchange in
  electron-proton scattering

abstract:
  We calculate the effects on the elastic electron-proton scattering cross
section of the two-photon exchange contribution with an intermediate $\Delta$
resonance. The $\Delta$ two-photon exchange contribution is found to be smaller
in magnitude than the previously evaluated nucleon contribution, with an
opposite sign at backward scattering angles. The sum of the nucleon and
$\Delta$ two-photon exchange corrections has an angular dependence compatible
with both the polarisation transfer and the Rosenbluth methods of measuring the
nucleon electromagnetic form factors.


title:
The Origin of the Difference between Multiplicities in e+e- Annihilation
  and Heavy Ion Collisions

abstract:
  Multiplicities in e+e- annihilation and relativistic heavy ion collisions
show remarkable similarities at high energies. A thermal-statistical model is
proposed to explain the differences which occur mainly at low beam energies.
Two different calculations are performed, one using an approximate
thermodynamic relationship, the other using a full thermal model code. The
results are in qualitative agreement, suggesting that the interplay of baryon
density and temperature tends to systematically suppress the total multiplicity
at lower beam energies.


title: Excitation of nuclear giant resonances in neutrino scattering off nuclei

abstract:
  The cross sections for neutrino scattering off the 12C and 16O nuclei are
calculated within the framework of the continuum Random Phase Approximation. A
model to consider also the final state interactions is developed. Total
charge-conserving and charge-exchange cross sections for both electron
neutrinos and antineutrinos have been calculated up to projectile energies of
100 MeV. The sensitivity of the cross sections to the residual interaction and
to the final state interactions is investigated. A direct comparison between
neutrino and electron scattering cross sections calculated under the same
kinematic conditions is presented. We found remarkable differences between
electromagnetic and weak nuclear responses. The model is applied to describe
cross sections of neutrinos produced by muon decay at rest and in supernovae
explosions.


title: Relativistic Equation of state with short range correlations

abstract:
  Short range correlations are introduced using unitary correlation method in a
relativistic approach to the equation of state of the infinite nuclear matter
in the framework of the Hartree-Fock approximation. The effect of the
correlations in the ground state properties of the nuclear matter is studied.


title:
Probing the density dependence of the symmetry potential at low and high
  densities

abstract:
  We investigate the sensitivity of several observables to the density
dependence of the symmetry potential within the microscopic transport model
UrQMD (ultrarelativistic quantum molecular dynamics model). The same systems
are used to probe the symmetry potential at both low and high densities. The
influence of the symmetry potentials on the yields of $\pi^{-}$, $\pi^{+}$, the
$\pi^{-}/\pi^{+}$ ratio, the $n/p$ ratio of free nucleons and the $t/^3$He
ratio are studied for neutron-rich heavy ion collisions ($^{208}Pb+^{208}Pb$,
$^{132}Sn+^{124}Sn$, $^{96}Zr+^{96}Zr$) at $E_b=0.4A {\rm GeV}$. We find that
these multiple probes provides comprehensive information on the density
dependence of the symmetry potential.


title: Two pion mediated scalar isoscalar NN interaction in the nuclear medium

abstract:
  We study the modification of the nucleon nucleon interaction in a nuclear
medium in the scalar isoscalar channel, mediated by the exchange of two
correlated ($\sigma$ channel) or uncorrelated pions. For this purpose we use a
standard approach for the renormalization of pions in nuclei. The corrections
obtained for the $NN$ interaction in the medium in this channel are of the
order of 20% of the free one in average, and the consideration of short range
correlations plays an important role in providing these moderate changes. Yet,
the corrections are sizable enough to suggest further studies of the stability
and properties of nuclear matter.


title: A New Application of the Gursey and Radicati Mass Formula

abstract:
  We study the spin- and flavour- dependent SU(6) violations in the baryon
spectrum by means of a G\"ursey Radicati mass formula. The average energy of
each SU(6)-multiplet is described using the SU(6) invariant interaction given
by a hypercentral potential containing a linear and a hypercoulomb term. We
show that the non strange and strange baryon masses are in general fairly well
reproduced and moreover that the G\"ursey Radicati formula holds in a
satisfactory way also for the excited states up to 2 GeV. The coefficients of
the G\"ursey Radicati SU(6) breaking part obtained by the fit of the
three-quark spectrum can be used to evaluate in first approximation the
splitting within multiplets also for exotic baryon systems.


title: Electromagnetic Form Factors and the Hypercentral CQM

abstract:
  New results about the electromagnetic form factors of the nucleon are
obtained with a semirelativistic version of the hypercentral constituent quark
model (hCQM) and a relativistic current. The complex structure of the
constituent quarks is taken into account implicitly by means of
phenomenological constituent quark form factors. We obtain a detailed
reproduction of the experimental data up to $5 GeV^2$, moreover our findings
about constituent quark root mean square radii are of the same order than the
recent ones obtained analyzing the proton structure functions.


title: The Vector Analyzing Power in Elastic Electron-Nucleus Scattering

abstract:
  The vector analyzing power A_n is calculated for elastic electron scattering
from a variety of spin zero nuclei at energies from 14 MeV to 3 GeV. Time
reversal symmetry insures that A_n vanish in first Born approximation.
Therefore A_n depends on Coulomb distortions and can be large for scattering
from heavy nuclei. The vector analyzing power is a potential source of
systematic error for parity violation experiments. We find that A_n=-0.361 ppm
for the kinematics of the Parity Radius Experiment (PREX) involving 850 MeV
electrons scattering at six degrees from 208Pb. This is comparable to the
parity violating asymmetry. However for HAPPEX He involving 3 GeV electrons
scattering on 4He we find that A_n is very small.


title: Correlations at intermediate $p_T$

abstract:
  Correlations among hadrons in jets produced in heavy-ion collisions are
discussed in the framework of the recombination model. The basic correlation at
the parton level is among the shower partons arising from kinematical
constraint. The resultant correlation between hadrons at intermediate $p_T$ is
amazingly rich in characteristics.


title:
Relation between the separable and one-boson-exchange potential for the
  covariant Bethe-Salpeter equation

abstract:
  We investigate the relation between the rank I separable potential for the
covariant Bethe-Salpeter equation and the one-boson-exchange potential. After
several trials of the parameter choices, it turns out that it is not always
possible to reproduce the phase-shifts calculated from a single term of the
one-boson-exchange potential especially of the $\sigma$-exchange term,
separately by the rank I separable potential. Instead, it is shown that the
separable potential is useful to parameterize the total nucleon-nucleon
interaction.


title: Size of the thermal source in relativistic heavy-ion collisions

abstract:
  The dependence of the size of the thermal source on the centrality in
ultrarelativistic heavy-ion collisions is studied. The interaction region
consists of a well defined thermalized core, and of an outer mantle where the
production scales with the number of participants. The thermal source builds up
in the region with the largest density of participants in the transverse plane.
Particle production in the thermalized core is enhanced in comparison to the
wounded nucleon model. The change of the degree of strangeness saturation with
centrality is also discussed. We perform an estimate of high pT jet absorption
finding that an increase of the absorption in the thermal core is compatible
with the data.


title:
Comparison of the extended linear sigma model and chiral perturbation
  theory

abstract:
  The pion-nucleon scattering amplitudes are calculated in tree approximation
with the use of the extended linear sigma model (ELSM) as well as heavy baryon
chiral perturbation theory (HB$\chi$PT), and the non-relativistic forms of the
ELSM results are compared with those of HB$\chi$PT. We find that the amplitudes
obtained in ELSM do not agree with those derived from the more fundamental
effective approach, HB$\chi$PT.


title: Two-photon exchange in elastic electron-nucleon scattering

abstract:
  A detailed study of two-photon exchange in unpolarized and polarized elastic
electron--nucleon scattering is presented, taking particular account of nucleon
finite size effects. Contributions from nucleon elastic intermediate states are
found to have a strong angular dependence, which leads to a partial resolution
of the discrepancy between the Rosenbluth and polarization transfer
measurements of the proton electric to magnetic form factor ratio, G_E/G_M. The
two-photon exchange contribution to the longitudinal polarization transfer P_L
is small, whereas the contribution to the transverse polarization transfer P_T
is enhanced at backward angles by several percent, increasing with Q^2. This
gives rise to a small, ~3% suppression of G_E/G_M obtained from the
polarization transfer ratio P_T/P_L at large Q^2. We also compare the
two-photon exchange effects with data on the ratio of e^+ p to e^- p cross
sections, which is predicted to be enhanced at backward angles. Finally, we
evaluate the corrections to the form factors of the neutron, and estimate the
elastic intermediate state contribution to the ^3He form factors.


title: Modified Fragmentation Function from Quark Recombination

abstract:
  Within the framework of the constituent quark model, it is shown that the
single hadron fragmentation function of a parton can be expressed as a
convolution of shower diquark or triquark distribution function and quark
recombination probability, if the interference between amplitudes of quark
recombination with different momenta is neglected. The recombination
probability is determined by the hadron's wavefunction in the constituent quark
model. The shower diquark or triquark distribution functions of a fragmenting
jet are defined in terms of overlapping matrices of constituent quarks and
parton field operators. They are similar in form to dihadron or trihadron
fragmentation functions in terms of parton operator and hadron states.
Extending the formalism to the field theory at finite temperature, we
automatically derive contributions to the effective single hadron fragmentation
function from the recombination of shower and thermal constituent quarks. Such
contributions involve single or diquark distribution functions which in turn
can be related to diquark or triquark distribution functions via sum rules. We
also derive QCD evolution equations for quark distribution functions that in
turn determine the evolution of the effective jet fragmentation functions in a
thermal medium.