title: First Order Relativistic Three-Body Scattering

abstract:
  Relativistic Faddeev equations for three-body scattering at arbitrary
energies are formulated in momentum space and in first order in the two-body
transition-operator directly solved in terms of momentum vectors without
employing a partial wave decomposition. Relativistic invariance is incorporated
within the framework of Poincare invariant quantum mechanics, and presented in
some detail.
  Based on a Malfliet-Tjon type interaction, observables for elastic and
break-up scattering are calculated up to projectile energies of 1 GeV. The
influence of kinematic and dynamic relativistic effects on those observables is
systematically studied. Approximations to the two-body interaction embedded in
the three-particle space are compared to the exact treatment.


title:
Hadronization Approach for a Quark-Gluon Plasma Formed in Relativistic
  Heavy Ion Collisions

abstract:
  A transport model is developed to describe hadron emission from a strongly
coupled quark-gluon plasma formed in relativistic heavy ion collisions. The
quark-gluon plasma is controlled by ideal hydrodynamics, and the hadron motion
is characterized by a transport equation with loss and gain terms. The two sets
of equations are coupled to each other, and the hadronization hypersurface is
determined by both the hydrodynamic evolution and the hadron emission. The
model is applied to calculate the transverse momentum distributions of mesons
and baryons, and most of the results agree well with the experimental data at
RHIC.


title: Anomalous viscosity of an expanding quark-gluon plasma

abstract:
  We argue that an expanding quark-gluon plasma has an anomalous viscosity,
which arises from interactions with dynamically generated colour fields. The
anomalous viscosity dominates over the collisional viscosity for large velocity
gradients or weak coupling. This effect may provide an explanation for the
apparent near perfect liquidity of the matter produced in nuclear collisions at
RHIC without the assumption that it is a strongly coupled state.


title: Hypernuclei and nuclear matter in a chiral SU(3) RMF model

abstract:
  We develop a chiral SU(3) RMF model for octet baryons, as an extension of the
recently developed chiral SU(2) RMF model with logarithmic sigma potential. For
Sigma-meson coupling, strong repulsion(SR) and weak repulsion(WR) cases are
examined in existing atomic shift data of Sigma^-. In both of these cases, we
need an attractive pocket of a few MeV depth around nuclear surface.


title: Energy Levels of Odd-Odd nuclei Using Broken Pair Model

abstract:
  Simple methods in the frame work of the broken pair model have been worked
out for odd-odd nuclei. The reliability of the model has been tested by
reproducing the shell model results of limiting cases in which the broken pair
model exactly coincides with the shell model. The model is then applied to
calculate the energy levels of some nuclei in the Zirconium region. The model
results compare reasonably well with the shell model as well as with the
experimental data.


title: Relations Between Coefficients of Fractional Parentage

abstract:
  For each of the (9/2), (11/2) and (13/2) single j shells we have only one
state with J=j V=3 for a five particle system. For four identical particles
there can be more than one state of seniority four. We note some ``ratio''
relations for the coefficients of fractional parentage for the four and five
identical particle systems.


title: Towards reliable calculations of the correlation function

abstract:
  The correlation function of two identical pions interacting via Coulomb
potential is computed for a general case of anisotropic particle's source of
finite life time. The effect of halo is taken into account as an additional
particle's source of large spatial extension. Due to the Coulomb interaction,
the effect of halo is not limited to very small relative momenta but it
influences the correlation function in a relatively large domain. The
relativistic effects are discussed in detail and it is argued that the
calculations have to be performed in the center-of-mass frame of particle's
pair where the (nonrelativistic) wave function of particle's relative motion is
meaningful. The Bowler-Sinyukov procedure to remove the Coulomb interaction is
tested and it is shown to significantly underestimate the source's life time.


title:
The intruder feature of 31Mg and the coexistence of many particle and
  many hole states

abstract:
  The low-lying level structure of $^{31}{\rm Mg}$ has been investigated by the
antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM)
with the Gogny D1S force. It is shown that the N=20 magic number is broken and
the ground state has the pure neutron $2p3h$ configuration. The coexistence of
many particle and many hole states at very low excitation energy is discussed.


title: Scaling of $v_2$ in heavy ion collisions

abstract:
  We interpret the scaling of the corrected elliptic flow parameter w.r.t. the
corrected multiplicity, observed to hold in heavy ion collisions for a wide
variety of energies and system sizes. We use dimensional analysis and
power-counting arguments to place constraints on the changes of initial
conditions in systems with different center of mass energy $\sqrt{s}$.
Specifically, we show that a large class of changes in the (initial) equation
of state, mean free path, and longitudinal geometry over the observed
$\sqrt{s}$ are likely to spoil the scaling in $v_2$ observed experimentally. We
therefore argue that the system produced at most Super Proton Synchrotron (SPS)
and Relativistic Heavy Ion Collider (RHIC) energies is fundamentally the same
as far as the soft and approximately thermalized degrees of freedom are
considered. The ``sQGP'' (Strongly interacting Quark-Gluon Plasma) phase, if it
is there, is therefore not exclusive to RHIC. We suggest, as a goal for further
low-energy heavy ion experiments, to search for a ``transition'' $\sqrt{s}$
where the observed scaling breaks.


title: Break-up stage restoration in multifragmentation reactions

abstract:
  In the case of Xe+Sn at 32 MeV/nucleon multifragmentation reaction break-up
fragments are built-up from the experimentally detected ones using evaluations
of light particle evaporation multiplicities which thus settle fragment
internal excitation. Freeze-out characteristics are extracted from experimental
kinetic energy spectra under the assumption of full decoupling between fragment
formation and energy dissipated in different degrees of freedom. Thermal
kinetic energy is determined uniquely while for freeze-out volume - collective
energy a multiple solution is obtained. Coherence between the solutions of the
break-up restoration algorithm and the predictions of a multifragmentation
model with identical definition of primary fragments is regarded as a way to
select the true value. The broad kinetic energy spectrum of $^3$He is
consistent with break-up genesis of this isotope.


title:
The hyperon-nucleon interaction: conventional versus effective field
  theory approach

abstract:
  Hyperon-nucleon interactions are presented that are derived either in the
conventional meson-exchange picture or within leading order chiral effective
field theory. The chiral potential consists of one-pseudoscalar-meson exchanges
and non-derivative four-baryon contact terms. With regard to meson-exchange
hyperon-nucleon models we focus on the new potential of the Juelich group,
whose most salient feature is that the contributions in the scalar--isoscalar
(\sigma) and vector--isovector (\rho) exchange channels are constrained by a
microscopic model of correlated \pi\pi and KKbar exchange.


title:
Charge-exchange reaction cross sections and the Gamow-Teller strength
  for double beta decay

abstract:
  The proportionality between single charge-exchange reaction cross sections in
the forward direction as found, for example from $(p,n)$ and $(^3$He,$t)$ and
from $(n,p)$ and $(d,^2$He) reactions, and the Gamow-Teller (GT) strength into
the same final nuclear states has been studied and/or assumed often in the
past. Using the most physically justified theory we have at our disposal and
for the specific example of the ${}^{76}$Ge-${}^{76}$Se system that may undergo
double beta-decay, we demonstrate that the proportionality is a relative good
assumption for reactions changing a neutron into a proton, i.e.
${}^{76}$Ge$(p,n){}^{76}$As. In this channel, the main contribution to the GT
strengths comes from the removal of a neutron from an occupied single-particle
(SP) state and putting a proton into an unoccupied SP state having either the
same state quantum numbers or those of the spin-orbit partner. In contrast to
this, in the second leg of the double beta decay a single proton must be taken
from an occupied SP state and a neutron placed in an unoccupied one. This
second process often is Pauli forbidden in medium-heavy nuclei and only can be
effected if the Fermi surface is smeared out. Such is the case for
${}^{76}$Se$(n,p){}^{76}$As. Our results suggest that one may not always assume
a proportionality between the forward-angle cross sections of the
charge-exchange reactions and the GT strength in any such medium-heavy nuclei.
The discrepancy originates from a pronounced effect of the radial dependence of
the nucleon-nucleon ($NN$) interaction in connection with the Pauli principle
on the cross sections in the $(n,p)$ reaction channel. Such a radial dependence
is completely absent in the GT transition operator.


title: Short-range correlations in quark matter

abstract:
  We investigate the role of short-range correlations in quark matter within
the framework of the SU(2) NJL model. Employing a next-to-leading order
expansion in 1/N_c for the quark self energy we construct a fully
self-consistent model that is based on the relations between spectral functions
and self energies. In contrast to the usual quasiparticle approximations we
take the collisional broadening of the quark spectral function consequently
into account. Mesons are dynamically generated in the fashion of a random phase
approximation, using full in-medium propagators in the quark loops. The results
are self-consistently fed back into the quark self energy. Calculations have
been performed for finite chemical potentials at zero temperature. The
short-range correlations do not only generate finite widths in the spectral
functions but also have influence on the chiral phase transition.


title: Neutron-$^3$H potentials and the $^5$H-properties

abstract:
  The continuum resonance spectrum of $^5$H ($^3$H+$n$+$n$) is investigated by
use of the complex scaled hyperspherical adiabatic expansion method. The
crucial $^3$H-neutron potential is obtained by switching off the Coulomb part
from successful fits to $^3$He-proton experimental data. These two-body
potentials must be expressed exclusively by operators conserving the
nucleon-core mean field angular momentum quantum numbers. The energies $E_R$
and widths $\Gamma_R$ of the $1/2^+$ ground-state resonance and the lowest two
excited $5/2^+$ and $3/2^+$-resonances are found to be $(1.6,1.5)$ MeV,
$(2.8,2.5)$ MeV and $(3.2,3.9)$ MeV, respectively. These results agree with
most of the experimental data. The energy distributions of the fragments after
decay of the resonances are predicted.


title: A theoretical view on bound antikaon-nuclear states

abstract:
  We present an overview of the latest theoretical studies on the antikaon
properties in the nuclear medium, in connection with the recent experimental
claims of very deeply bound antikaon-nuclear states. We argue that proper
many-body formulations using modern realistic antikaon-nucleon interactions are
not able to generate such systems. Instead, a simple two-nucleon antikaon
absorption mechanism where the remaining nucleus acts as spectator explains the
peak in the semi-inclusive proton momentum spectrum, observed on a 4He target
at KEK (but later not confirmed in an inclusive experiment) and on a 6Li target
at FINUDA. This signal is clearly seen in another FINUDA experiment measuring
the invariant mass of Lambda-proton pairs after two-nucleon kaon absorption. We
show that another peak of this experiment, seen at lower invariant masses and
interpreted as a bound K-pp state, is simply generated by the same two-nucleon
absorption mechanism followed by final-state interactions of the produced
particles with the residual nucleus. Our conclusion is that all the
experimental claims for the formation of very deeply bound antikaonic nuclear
systems receive an alternative explanation in terms of conventional nuclear
processes.


title: Resonances and fluctuations at SPS and RHIC

abstract:
  We perform an analysis of preliminary data on hadron yields and fluctuations
within the Statistical hadronization ansatz. We describe the theoretical
disagreements between different statistical models currently on the market, and
show how the simultaneous analysis of yields and fluctuations can be used to
determine if one of them can be connected to underlying physics. We perform
such an analysis on preliminary RHIC and SPS A-A data that includes particle
yields, ratios and event by event fluctuations. We show that the equilibrium
statistical model can not describe the $K/\pi$ fluctuation measured at RHIC and
SPS, unless an unrealistically small volume is assumed. Such small volume then
makes it impossible to describe the total particle multiplicity. The
non-equilibrium model,on the other hand, describes both the $K/\pi$ fluctuation
and yields acceptably due to the extra boost to the $\pi$ fluctuation provided
by the high pion chemical potential. We show, however, that both models
significantly over-estimate the $p/\pi$ fluctuation measured at the SPS, and
speculate for the reason behind this.


title:
Threshold Effects in Multi-channel Coupling and Spectroscopic Factors in
  Exotic Nuclei

abstract:
  In the threshold region, the cross section and the associated overlap
integral obey the Wigner threshold law that results in the Wigner-cusp
phenomenon. Due to flux conservation, a cusp anomaly in one channel manifests
itself in other open channels, even if their respective thresholds appear at a
different energy. The shape of a threshold cusp depends on the orbital angular
momentum of a scattered particle; hence, studies of Wigner anomalies in weakly
bound nuclei with several low-lying thresholds can provide valuable
spectroscopic information. In this work, we investigate the threshold behavior
of spectroscopic factors in neutron-rich drip-line nuclei using the Gamow Shell
Model, which takes into account many-body correlations and the continuum
effects. The presence of threshold anomalies is demonstrated and the
implications for spectroscopic factors are discussed.


title: Recent developments in chiral dynamics of hadrons and hadrons in nuclei

abstract:
  In this talk I present recent developments in the field of hadronic physics
and hadrons in the nuclear medium. I review the unitary chiral approach to
meson baryon interaction and address the topics of the two dynamically
generated $\Lambda(1405)$ resonances, with experiments testing it, the
$\Lambda(1520)$ and $\Delta(1700)$ resonances, plus the $\Lambda(1520)$,
$\Sigma(1385)$ and $\omega$ in the nuclear medium.


title:
Irreducible tensor approach to spin observables in photo production of
  mesons with arbitrary spin-parity $s^{\pi}$

abstract:
  A theoretical formalism leading to elegant derivation of formulae for all
spin observables is outlined for photo production of mesons with arbitrary spin
parity $s^{\pi}$. The salient features of this formalism based on irreducible
tensor techniques are i) the number of independent irreducible tensor
amplitudes is $4(2s+1)$, ii) a single compact formula is sufficient to express
these amplitudes in terms of allowed electric and magnetic multipole amplitudes
and iii) all the spin observables including beam analyzing powers as well as
the differential cross section are expressible in terms of bilinear irreducible
tensors of rank 0 to $2(s+1)$. The relationship between the irreducible tensor
amplitudes and the helicity amplitudes is elucidated in general and explicit
expressions for the helicity amplitudes are given in terms of the irreducible
tensor amplitudes in the particular cases of pseudoscalar and vector meson
photo production. The connection between the irreducible tensor amplitudes
introduced here and the well known CGLN amplitudes for photo production of
pseudoscalar mesons is also established.


title:
Bakamjian-Thomas mass operator for the few-nucleon system from chiral
  dynamics

abstract:
  We present an exploratory study consisting in the formulation of a
relativistic quantum mechanics to describe the few-nucleon system at low
energy, starting from the quantum field theoretical chiral Lagrangian involving
pions and nucleons. To this aim we construct a Bakamjian-Thomas mass operator
and perform a truncation of the Fock space which respects at each stage the
relativistic covariance. Such truncation is justified, at sufficiently low
energy, in the framework of a systematic chiral expansion. As an illustration
we discuss the bound state observables and low-energy phaseshifts of the
nucleon-nucleon and pion-nucleon scattering at the leading order of our scheme.


title: Hadron Correlations and Parton Recombination

abstract:
  Parton recombination has been found to be an extremely useful model to
understand hadron production at the Relativistic Heavy Ion Collider. It is
particularly important to explore its connections with hard processes. This
article reviews some of the aspects of the quark recombination model and places
particular emphasis on hadron correlations.


title: Early Time Evolution of High Energy Heavy Ion Collisions

abstract:
  We solve the Yang-Mills equations in the framework of the
McLerran-Venugopalan model for small times tau after a collision of two nuclei.
An analytic expansion around tau=0 leads to explicit results for the field
strength and the energy momentum tensor of the gluon field at early times. We
then discuss constraints for the energy density, pressure and flow of the
plasma phase that emerges after thermalization of the gluon field.


title: Interplay between kaon condensation and hyperons in highly dense matter

abstract:
  Possible coexistence and/or competition of kaon condensation with hyperons
are investigated in hyperonic matter, where hyperons are mixed in the ground
state of neutron-star matter. The formulation is based on the effective chiral
Lagrangian for the kaon-baryon interaction and the nonrelativistic
baryon-baryon interaction model. First, the onset condition of the s-wave kaon
condensation realized from hyperonic matter is reexamined. It is shown that the
usual assumption of the continuous phase transition is not always kept valid in
the presence of the negatively charged hyperons. Second, the equation of state
(EOS) of the kaon-condensed phase in hyperonic matter is discussed. In the case
of the stronger kaon-baryon attractive interaction, it is shown that a local
energy minimum with respect to the baryon number density appears as a result of
considerable softening of the EOS due to both kaon condensation and
hyperon-mixing and recovering of the stiffness of the EOS at very high
densities. This result implies a possible existence of self-bound objects with
kaon condensates on any scale from an atomic nucleus to a neutron star.


title: Kaon condensation in neutron star using relativistic mean field models

abstract:
  We use the modified quark-meson coupling and the quantum hadrodynamics models
to study the properties of neutron star. Coupling constants of both models are
adjusted to reproduce the same saturation properties. The onset of kaon
condensation in neutron star matter is studied in detail over a wide range of
kaon optical potential values. Once the kaon condensation takes place, the
population of kaons increases very rapidly, and kaons become the dominant
component, possibly making the neutron star matter a kaonic matter if the kaon
optical potential is large.


title: Nuclear surface studies with antiprotonic atom X-rays

abstract:
  The recent and older level shifts and widths in pbar atoms are analyzed. The
results are fitted by an antiproton-nucleus optical potential with two basic
complex strength parameters. These parameters are related to average S and P
wave scattering parameters in the subthreshold energy region. A fair
consistency of the X-ray data for all Z values, stopping pbar data and the
Nbar-N scattering data has been achieved. The determination of neutron density
profiles at the nuclear surface is undertaken, and the determination of the
neutron R_{rms} radii is attempted. Uncertainties due to the input data and the
procedure are discussed.


title:
Temperature dependence of sound velocity and hydrodynamics of
  ultra-relativistic heavy-ion collisions

abstract:
  The effects of different forms of the sound-velocity function c_s(T) on the
hydrodynamic evolution of matter created in the central region of
ultra-relativistic heavy-ion collisions are studied. At high temperatures
(above the critical temperature T_c) we use the sound velocity function
obtained from the recent lattice simulations of QCD, whereas at low
temperatures we use the ideal hadron gas model. At moderate temperatures
different interpolations between those two results are employed. They are
characterized by different values of the local maximum (at T = 0.4 T_c) and
local minimum (at T=T_c). The extreme values are chosen in such a way that at
high temperature all considered sound-velocity functions yield the entropy
density consistent with the lattice simulations of QCD. We find that the
presence of a distinct minimum of the sound velocity leads to a very long (~ 20
fm/c) evolution time of the system. Since such long evolution times are not
compatible with the recent estimates based on the HBT interferometry, we
conclude that the hydrodynamic description becomes adequate if the QCD
cross-over phase transition renders the smooth temperature variations of the
sound velocity, with a possible shallow minimum at T_c where the values of
c_s^2(T) remain well above 0.1.


title:
Reduction of the RPA eigenvalue problem and a generalized Cholesky
  decomposition for real-symmetric matrices

abstract:
  The particular symmetry of the random-phase-approximation (RPA) matrix has
been utilized in the past to reduce the RPA eigenvalue problem into a
symmetric-matrix problem of half the dimension. The condition of positive
definiteness of at least one of the matrices A+-B has been imposed (where A and
B are the submatrices of the RPA matrix) so that, e.g., its square root can be
found by Cholesky decomposition. In this work, alternative methods are pointed
out to reduce the RPA problem to a real (not symmetric, in general) problem of
half the dimension, with the condition of positive definiteness relaxed. One of
the methods relies on a generalized Cholesky decomposition, valid for
non-singular real symmetric matrices. The algorithm is described and a
corresponding routine in C is given.


title: Nucleon Mass Splitting at Finite Isospin Chemical Potential

abstract:
  We investigate nucleon mass splitting at finite isospin chemical potential in
the frame of two flavor Nambu--Jona-Lasinio model. It is analytically proved
that, in the phase with explicit isospin symmetry breaking the proton mass
decreases and the neutron mass increases linearly in the isospin chemical
potential.


title: Di-electrons from $\eta$ meson Dalitz decay in proton-proton collisions

abstract:
  The reaction $ pp \to pp \eta \to pp \gamma e^+ e^-$ is discussed within a
covariant effective meson-nucleon theory. The model is adjusted to data of the
subreaction $pp \to pp \eta$. Our focus is on di-electrons from Dalitz decays
of $\eta$ mesons, $\eta\to \gamma \gamma^* \to\gamma e^+e^-$, and the role of
the corresponding transition form factor $F_{\eta \gamma \gamma^*}$. Numerical
results are presented for the intermediate energy kinematics of HADES
experiments.


title:
Photoproduction of eta-mesons on the deuteron above S11(1535) in the
  presence of a narrow P11(1670) resonance

abstract:
  Incoherent photoproduction of eta-mesons on the deuteron is considered. The
main attention is paid to the region above the S11(1535) resonance where rather
narrow resonance like structure in the total cross section extracted for gamma
n -> eta n has been reported. The corresponding experimental results are
analyzed from the phenomenological standpoint within the model containing a
baryon P11 with the mass about 1670 MeV and a width less than 30 MeV. This
resonance was suggested in some recent works as a nonstrange member of the
pentaquark antidecuplet with J^P=1/2^+. The calculation is also performed for
the polarized and nonpolarized angular distributions of $\eta$ mesons. In
addition, we present our predictions for the cross sections of the neutral
kaons and double pion photoproduction, where the same narrow P11(1670)
resonance is assumed to contribute through the decay into K^0 Lambda and pi
Delta configuration.


title:
The NN phase shifts in the extended quark-delocalization,
  color-screening model

abstract:
  An alternative method is applied to the study of nucleon-nucleon(NN)
scattering phase shifts in the framework of extended quark delocalization,
color-screening model(QDCSM), where the one-pion-exchange(OPE) with short-range
cutoff is included.


title:
Thermalization of quark-gluon matter by 2-to-2 and 3-to-3 elastic
  scatterings

abstract:
  Thermalization of quark-gluon matter is studied with a transport equation
that includes contributions of 2-to-2 and 3-to-3 elastic scatterings.
Thermalization time is related to the squared amplitudes for the elastic
scatterings that are calculated in perturbative QCD.


title: Nucleon-antinucleon Interaction from the Modified Skyrme Model

abstract:
  We calculate the static nucleon-antinucleon interaction potential from the
modified Skyrme model with additional $B^{\mu}B_{\mu}$ term using the product
ansatz. The static properties of single baryon are improved in the modified
Skyrme model. State mixing is taken into account by perturbation theory, which
substantially increases the strength of the central attraction. We obtain a
long and mid range potential which is in qualitative agreement with some
phenomenological potentials.


title:
Influence of Meson's Widths on Yukawa-like Potentials and Lattice
  Correlation Functions

abstract:
  Euclidean point-to-point propagators or wall-to-wall correlators related to
exchange by an unstable particle(sigma,rho,omega-mesons) are modified by
presence of particle width. In particular, the usual method of deriving
particle masses from logarithmic derivatives need to be modified. Similarly
Yukawa-like potentials of nuclear physics due to exchange of those mesons are
significantly modified since the coupling to the decay products is strong. For
example, the large distance asymptotic changes, exp(-M_{min} r), where M_{min}
is the sum of the decay product masses
  (2 m_{\pi}, 2 m_{e}, 2 m_{\nu}). In the area M_{min}r<1the potential has a
long-range tail 1/r^3. Similar effects appear due to the virtual decays in the
elecroweak sector of the Standard model. The $Z-\gamma$ mixing via electron
loop gives the parity violation potential with the range $1/2 m_{e}$, i.e. the
range of the weak interaction increases $10^{5}$ times.


title: Elliptic flow of thermal dileptons in relativistic nuclear collisions

abstract:
  We calculate the transverse momentum and invariant mass dependence of
elliptic flow of thermal dileptons for Au+Au collisions at the Relativistic
Heavy Ion Collider. The system is described using hydrodynamics, with the
assumption of formation of a thermalized quark-gluon plasma at some early time,
followed by cooling through expansion, hadronization and decoupling. Dileptons
are emitted throughout the expansion history: by annihilation of quarks and
anti-quarks inthe early quark-gluon plasma stage and through a set of hadronic
reactions during the late hadronic stage. The resulting differential elliptic
flow exhibits a rich structure, with different dilepton mass windows providing
access to different stages of the expansion history. Elliptic flow measurements
for dileptons,combined with those of hadrons and direct photons, are a powerful
tool for mapping the time-evolution of heavy-ion collisions.


title: Eft for DFT

abstract:
  These lectures give an overview of the ongoing application of effective field
theory (EFT) and renormalization group (RG) concepts and methods to density
functional theory (DFT), with special emphasis on the nuclear many-body
problem.


title: Microscopic calculation of symmetry projected nuclear level densities

abstract:
  We present a quantum Monte Carlo method with exact projection on parity and
angular momentum that is free of sign-problems for seniority-conserving nuclear
interactions. This technique allows a microscopic calculation of angular
momentum and parity projected nuclear level densities. We present results for
the $^{55}$Fe, $^{56}$Fe and $^{57}$Fe isotopes. Signatures of the pairing
phase transition are observed in the angular momentum distribution of the
nuclear level density.


title: Thermal freeze-out versus chemical freeze-out reexamined

abstract:
  An alternative, to the commonly used blast-wave, model describing the
freeze-out hypersurface is applied to fit the $p_{T}$-spectra of identified
hadrons measured at relativistic heavy-ion collisions at $\sqrt{s_{NN}}=62.4,
130$ and 200 GeV. Decays of resonances are taken into account completely. It
has turned out that the fitted freeze-out temperature and baryon number
chemical potential depend weakly on the centrality of the collision and their
values are close to the chemical freeze-out values determined from fits to
particle yield ratios.


title:
Accelerating Solutions of Perfect Fluid Hydrodynamics for Initial Energy
  Density and Life-Time Measurements in Heavy Ion Collisions

abstract:
  A new class of accelerating, exact, explicit and simple solutions of
relativistic hydrodynamics is presented. Since these new solutions yield a
finite rapidity distribution, they lead to an advanced estimate of the initial
energy density and life-time of high energy heavy ion reactions. Accelerating
solutions are also given for spherical expansions in arbitrary number of
spatial dimensions.


title: Neutrino Breakup of A=3 Nuclei in Supernovae

abstract:
  We extend the virial equation of state to include 3H and 3He nuclei, and
predict significant mass-three fractions near the neutrinosphere in supernovae.
While alpha particles are often more abundant, we demonstrate that energy
transfer cross-sections for muon and tau neutrinos at low densities are
dominated by breakup of the loosely-bound 3H and 3He nuclei. The virial
coefficients involving A=3 nuclei are calculated directly from the
corresponding nucleon-3H and nucleon-3He scattering phase shifts. For the
neutral-current inelastic cross-sections and the energy transfer cross
sections, we perform ab-initio calculations based on microscopic two- and
three-nucleon interactions and meson-exchange currents.


title: From Quark Gluon Plasma to a Perfect Fluid of Quarks and Beyond

abstract:
  With high energy heavy ion collisions one tries to create a new forms of
matter that is similar to the one present at the birth of our Universe. Recent
development on flow pattern, initial energy-density and freeze-out temperature
shows that most likely this new form of matter is in a deconfined state, has
colored degrees of freedom and is more fluid-like than gas-like. In present
paper we calculate estimations on the physical properties of this new-old
matter.


title:
RPA Correlations and Nuclear Densities in Relativistic Mean Field
  Approach

abstract:
  The relativistic mean field approach (RMF) is well known for describing
accurately binding energies and nucleon distributions in atomic nuclei
throughout the nuclear chart. The random phase approximation (RPA) built on top
of the RMF is also a good framework for the study of nuclear excitations. Here,
we examine the consequences of long range correlations brought about by the RPA
on the neutron and proton densities as given by the RMF approach.


title:
Coexistence of spherical states with deformed and superdeformed bands in
  doubly magic 40-Ca; A shell model challenge

abstract:
  Large scale shell model calculations, with dimensions reaching 10**9, are
carried out to describe the recently observed deformed (ND) and superdeformed
(SD) bands based on the first and second excited 0+ states of 40-Ca at 3.35-MeV
and 5.21-MeV respectively. A valence space comprising two major oscillator
shells, sd and pf, can accommodate most of the relevant degrees of freedom of
this problem. The ND band is dominated by configurations with four particles
promoted to the pf-shell (4p-4h in short). The SD band by 8p-8h configurations.
The ground state of 40-Ca is strongly correlated, but the closed shell still
amounts to 65%. The energies of the bands are very well reproduced by the
calculations. The out-band transitions connecting the SD band with other states
are very small and depend on the details of the mixing among the different
np-nh configurations, in spite of that, the calculation describes them
reasonably. For the in-band transition probabilities along the SD band, we
predict a fairly constant transition quadrupole moment Q_0(t)~170 e fm**2 up to
J=10, that decreases toward the higher spins. We submit also that the J=8
states of the deformed and superdeformed band are maximally mixed.


title:
Sensitivity of Nuclear Transition Frequencies to Temporal Variation of
  the Fine Structure Constant or the Strong Interaction

abstract:
  There exist in nature a few nuclear isomers with very low (eV) excitation
energies, and the combination of low energy and narrow width makes them
possible candidates for laser-based investigations. The best candidate is the
lowest-energy excited state known in nuclear physics, the 7.6(5) eV isomer of
$^{229}$Th. A recent study suggests that a measurement of the temporal
variation of the excitation energy of this isomer would have 5-6 orders of
magnitude enhanced sensitivity to a variation of the fine structure constant
($\alpha \cong 1/137.036$) or of a strong interaction parameter
($m_q/\Lambda_{QCD}$). We reexamine the physics involved in these arguments. By
invoking the Feynman-Hellmann Theorem we argue that there is no expectation of
significantly enhanced sensitivity to a variation in the fine structure
constant (beyond that obtained from experimental considerations such as the low
energy and narrow width of the isomer). A similar argument applies to the
strong interaction, but evaluating the shift due to temporal variations of the
underlying parameters of the strong interaction may be beyond current nuclear
structure techniques.


title: The Role of 5-quark Components on the Nucleon Form Factors

abstract:
  The covariant quark model is shown to allow a phenomenological description of
the neutron electric form factor, G_E^n(Q^2), in the impulse approximation,
provided that the wave function contains minor (~ 3 %) admixtures of the lowest
sea-quark configurations. While that form factor is not very sensitive to
whether the \bar q in the qqqq\bar q component is in the P-state or in the
S-state, the calculated nucleon magnetic form factors are much closer to the
empirical values in the case of the former configuration. In the case of the
electric form factor of the proton, G_E^p(Q^2), a zero appears in the impulse
approximation close to 9 GeV^2, when the \bar q is in the P-state. That
configuration, which may be interpreted as a pion loop ("cloud") fluctuation,
also leads to a clearly better description of the nucleon magnetic moments.
When the amplitude of the sea-quark admixtures are set so as to describe the
electric form factor of the neutron, the qqqq\bar q admixtures have the
phenomenologically desirable feature, that the electric form factor of the
proton falls at a more rapid rate with momentum transfer than the magnetic form
factor.


title:
New analysis method of the halo phenomenon in finite many-fermion
  systems. First applications to medium-mass atomic nuclei

abstract:
  A new analysis method to investigate halos in finite many-fermion systems is
designed, as existing characterization methods are proven to be
incomplete/inaccurate. A decomposition of the internal wave-function of the
{$N$-body} system in terms of overlap functions allows a model-independent
analysis of medium-range and asymptotic properties of the internal one-body
density. The existence of a spatially decorrelated region in the density
profile is related to the existence of three typical energy scales in the
excitation spectrum of the {$(N-1)$-body} system. A series of model-independent
measures, taking the internal density as the only input, are introduced. The
new measures allow a quantification of the potential halo in terms of the
average number of fermions participating to it and of its impact on the system
extension. Those new "halo factors" are validated through simulations and
applied to results obtained through energy density functional calculations of
medium-mass nuclei. Performing spherical Hartree-Fock-Bogoliubov calculations
with state-of-the-art Skyrme plus pairing functionals, a collective halo is
predicted in drip-line Cr isotopes, whereas no such effect is seen in Sn
isotopes.


title: Thermal Signatures of Pairing Correlations in Nuclei and Nanoparticles

abstract:
  The Bardeen-Cooper-Schrieffer (BCS) mean-field theory of the pairing
interaction breaks down for nuclei and ultra-small metallic grains
(nanoparticles). Finite-temperature pairing correlations in such finite-size
systems can be calculated beyond the BCS theory in an auxiliary-field Monte
Carlo approach. We identify thermal signatures of pairing correlations in both
nuclei and nanoparticles that depend on the particle-number parity.


title: Isospin effect in the statistical sequential decay

abstract:
  Isospin effect of the statistical emission fragments from the equilibrated
source is investigated in the frame of statistical binary decay implemented
into GEMINI code, isoscaling behavior is observed and the dependences of
isoscaling parameters $\alpha$ and $\beta$ on emission fragment size, source
size, source isospin asymmetry and excitation energies are studied. Results
show that $\alpha$ and $\beta$ neither depends on light fragment size nor on
source size. A good linear dependence of $\alpha$ and $\beta$ on the inverse of
temperature $T$ is manifested and the relationship of
$\alpha=4C_{sym}[(Z_{s}/A_{s})_{1}^{2}-(Z_{s}/A_{s})_{2}^{2}]/T$ and
$\beta=4C_{sym}[(N_{s}/A_{s})_{1}^{2}-(N_{s}/A_{s})_{2}^{2}]/T$ from different
isospin asymmetry sources are satisfied. The symmetry energy coefficient
$C_{sym}$ extracted from simulation results is $\sim$ 23 MeV which includes
both the volume and surface term contributions, of which the surface effect
seems to play a significant role in the symmetry energy.


title:
Two-Body Interaction. I. Inverse Scattering Problem, Nonlocal
  Potentials, and a Conception of Quantum Measurement Theory

abstract:
  The present paper generalizes preceding papers of the author and opens a
cycle of works concerning the general posing and solution in analytic form of
the quantum-mechanical inverse scattering problem (for a given partial channel)
in a nontraditional setting: the scattering wave function in the momentum
representation is recovered immediately from the scattering data. The solution
we find for the problem in question is given by a family of phase-equivalent
wave functions with explicitly controlled functional-analytic arbitrariness.
This arbitrariness corresponds to the arbitrariness in the choice of
phase-equivalent nonlocal potentials and causes the necessary to include some
additional concepts of quantum measurement theory to a complete description of
quantum-mechanical systems. The mathematical apparatus of the approach thus
developed is illustrated by the example of describing the nucleon-nucleon
interaction in uncoupled partial channels.


title: Signature of Shallow Potentials in Deep Sub-barrier Fusion Reactions

abstract:
  We extend a recent study that explained the steep falloff in the fusion cross
section at energies far below the Coulomb barrier for the symmetric dinuclear
system 64Ni+64Ni to another symmetric system, 58Ni+58Ni, and the asymmetric
system 64Ni+100Mo. In this scheme the very sensitive dependence of the internal
part of the nuclear potential on the nuclear equation of state determines a
reduction of the classically allowed region for overlapping configurations and
consequently a decrease in the fusion cross sections at bombarding energies far
below the barrier. Within the coupled-channels method, including couplings to
the low-lying 2+ and 3- states in both target and projectile as well as mutual
and two-phonon excitations of these states, we calculate and compare with the
experimental fusion cross sections, S-factors, and logarithmic derivatives for
the above mentioned systems and find good agreement with the data even at the
lowest energies. We predict, in particular, a distinct double peaking in the
S-factor for the far subbarrier fusion of 58Ni+58Ni which should be tested
experimentally.


title: Semiclassical study on Proton and Neutron

abstract:
  Starting from the existing semiclassical studies on hydrogenoid atoms, we
propose a similar intuitive exercise for the three-body quark systems
corresponding to protons and neutrons. In the frame of this toy model we try to
explain both the stabilities of proton and neutron with respect to the nuclear
interaction, and the spectrum of nucleonic resonances with J=1/2. Our choice is
motivated also by a good agreement obtained for the up and down quark rest
masses report. Taking into account the deterministic chaotic behavior of
many-body systems, the discussed exercise could be understood as an interesting
particular case of a quantum three-body problem which admits a semiclassical
treatment.


title: $J/\psi$ suppression in the threshold model and QGP formation time

abstract:
  In the QGP motivated threshold model, in addition to the normal nuclear
absorption, $J/\psi$'s are subjected to an additional "anomalous" suppression.
We have analysed the recently published PHENIX data on the participant number
dependence of the nuclear modification factor for $J/\psi$'s in Au+Au
collisions and extracted the anomalous suppression required to explain the
data. At mid rapidity $J/\psi$'s are anomalously suppressed only above a
threshold density $n_c$=3.73 fm$^{-2}$. The forward rapidity data on the
otherhand require that $J/\psi$'s are continuously "anomalously" suppressed.
The analysis strongly indicate that in mid rapidity $J/\psi$'s are suppressed
in a deconfined medium. Using the PHENIX data on the participant number
dependence of the Bjorken energy density, we have also estimated the QGP
formation time. For critical temperature $T_c$=192 MeV, estimated QGP formation
time ranges between 0.06-0.08 fm/c.


title: Chain configurations in light nuclei

abstract:
  The model of nuclear matter built from alpha-particles is proposed. The
strong deformed shape for doubly even N=Z nuclides from carbon to magnesium has
been determined according to this model. In this paper we undertake very simple
approach, which assumes the existence of low lying chain configurations.


title:
The CJT calculation in studying nuclear matter beyond mean field
  approximation

abstract:
  We have introduced a CJT calculation in studying nuclear matter beyond mean
field approximation. Based on the CJT formalism and using Walecka model, we
have derived a set of coupled Dyson equations of nucleons and mesons.
Neglecting the medium effects of the mesons, the usual MFT results could be
reproduced. The beyond MFT calculations have been performed by thermodynamic
consistently determining the meson effective masses and solving the coupled gap
equations for nucleons and mesons. The numerical results for the nucleon and
meson effective masses at finite temperature and chemical potential in nuclear
matter are discussed.


title: Spectra and Symmetry in Nuclear Pairing

abstract:
  We apply the algebraic Bethe ansatz technique to the nuclear pairing problem
with orbit dependent coupling constants and degenerate single particle energy
levels. We find the exact energies and eigenstates. We show that for a given
shell, there are degeneracies between the states corresponding to less and more
than half full shell. We also provide a technique to solve the equations of
Bethe ansatz.


title: Role of pairing interaction in neutron rich odd and even Zr nuclei

abstract:
  Neutron rich Zr nuclei with number of neutrons between $N$= 50 and 82 are
investigated in the relativistic mean field approach in co-ordinate space. The
resonant levels in the positive energy continuum have been explicitly included
in the calculation. Odd nuclei have been treated in the blocking approximation.
Our calculation indicates that the dripline for odd mass isotopes is far away
from that for the even mass ones. Pairing interaction plays a significant role
in stabilizing the even isotopes, thus extending the dripline for them.


title:
Momentum distributions and spectroscopic factors of doubly-closed shell
  nuclei in correlated basis function theory

abstract:
  The momentum distributions, natural orbits, spectroscopic factors and
quasi-hole
  wave functions of the C12, O16, Ca40, Ca48, and Pb208 doubly closed shell
nuclei, have been calculated in the framework of the Correlated Basis Function
theory, by using the Fermi hypernetted chain resummation techniques. The
calculations have been done by using the realistic Argonne v8' nucleon-nucleon
potential, together with the Urbana IX three-body interaction. Operator
dependent correlations, which consider channels up to the tensor ones, have
been
  used. We found noticeable effects produced by the correlations. For high
momentum values, the momentum distributions show large enhancements with
respect to the independent particle model results. Natural orbits occupation
numbers are depleted by about the 10\% with respect to the independent particle
model values. The effects of the correlations on the spectroscopic factors are
larger on the more deeply bound states.


title:
A statistical model analysis of $K/\pi$ fluctuations in heavy ion
  collisions

abstract:
  We briefly describe two statistical hadronization models, based respectively
on the presence and absence of light quark chemical equilibrium, used to
analyze particle yields in heavy ion collisions. We then try to distinguish
between these models using $K/\pi$ fluctuations data. We find that while the
non-equilibrium model provides an acceptable description of fluctuations at top
SPS and RHIC energies, both models considerably under-estimate fluctuations at
low SPS energies.


title: Femtoscopic correlations in multiparticle production and beta-decay

abstract:
  The basics of formalism of femtoscopic and spectroscopic correlations are
given, the orthogonal character of these correlations is stressed. The
similarity and difference of femtoscopic correlations in multiparticle
production and beta-decay is discussed.


title:
Application of density dependent parametrization models to asymmetric
  nuclear matter

abstract:
  Density dependent parametrization models of the nucleon-meson effective
couplings, including the isovector scalar \delta-field, are applied to
asymmetric nuclear matter. The nuclear equation of state and the neutron star
properties are studied in an effective Lagrangian density approach, using the
relativistic mean field hadron theory. It is known that the introduction of a
\delta-meson in the constant coupling scheme leads to an increase of the
symmetry energy at high density and so to larger neutron star masses, in a pure
nucleon-lepton scheme. We use here a more microscopic density dependent model
of the nucleon-meson couplings to study the properties of neutron star matter
and to re-examine the \delta-field effects in asymmetric nuclear matter. Our
calculations show that, due to the increase of the effective \delta coupling at
high density, with density dependent couplings the neutron star masses in fact
can be even reduced.


title:
Evolution of nuclear shells with the Skyrme density dependent
  interaction

abstract:
  We present the evolution of the shell structure of nuclei in Hartree-Fock
calculations using Skyrme's density-dependent effective nucleon-nucleon
interaction. The role of the tensor part of the Skyrme interaction to the
Hartree-Fock spin-orbit splitting in spherical spin unsaturated nuclei is
reanalyzed. The contribution of a finite range tensor force to the spin-orbit
splitting in closed shell nuclei is calculated. It is found that the exact
matrix elements of a Gaussian and of a one-pion exchange tensor potential could
be written as a product Skyrme's short range expression times a suppression
factor which is almost constant for closed shell nuclei with mass number $A\geq
48$. The suppression factor is $\sim 0.15$ for the one-pion exchange potential.


title: A comparative study of Jet-quenching Schemes

abstract:
  The four major approximation schemes devised to study the modification of
jets in dense matter are outlined. The comparisons are restricted to basic
assumptions and approximations made in each case and the calculation
methodology used. Emergent underlying similarities between apparently disparate
methods brought about by the approximation schemes are exposed.
Parameterizations of the medium in each scheme are discussed in terms of the
transport coefficient $\hat{q}$. Discrepancies between the estimates obtained
from the four schemes are discussed. Recent developments in the basic theory
and phenomenology of energy loss are highlighted.


title:
Amplification of Quantum Meson Modes in the Late Time of the Chiral
  Phase Transition

abstract:
  We investigate the time evolution of the quantum meson modes in the late time
of chiral phase transition. In particular, it is shown that there exists a
possible solution to the equation of motion for the quantum meson modes, which
reveals a parametric resonance and/or resonance through forced oscillation
induced by the small oscillation of the chiral condensate. After that, we
demonstrate the unstable regions for the quantum meson modes in both the cases
of a uniform and spatially expanding system.


title: Jet-fluid string formation and decay in high-energy heavy-ion collisions

abstract:
  We propose a new hadronization mechanism, jet-fluid string (JFS) formation
and decay, to understand observables in intermediate to high-$p_{T}$ regions
comprehensively. In the JFS model, hard partons produced in jet lose their
energy in traversing the QGP fluid, which is described by fully
three-dimensional hydrodynamic simulations. When a jet parton escapes from the
QGP fluid, it picks up a partner parton from a fluid and forms a color singlet
string, then it decays to hadrons. We find that high-$p_T$ $v_2$ values in JFS
are about two times larger than in the independent fragmentation model.


title: Freeze out of the expanding system

abstract:
  The freeze out (FO) of the expanding systems, created in relativistic heavy
ion collisions, is discussed. We start with kinetic FO model, which realizes
complete physical FO in a layer of given thickness, and then combine our
gradual FO equations with Bjorken type system expansion into a unified model.
We shall see that the basic FO features, pointed out in the earlier works, are
not smeared out by the expansion.


title: Neutron-Proton pairing revisited

abstract:
  We reexamine neutron-proton pairing as a phenomenon that should be explanable
in a microscopic theory of nuclear binding energies. Empirically, there is an
increased separation energy when both neutron and proton numbers are even or if
they are both odd. The enhancement is present at some level in nearly all
nuclei: the separation energy difference has the opposite sign in less than 1%
of the cases in which sufficient data exist. We discuss the possible origin of
the effect in the context of density functional theory (DFT) and its
extensions. Neutron-proton pairing from the Hartree-Fock-Bogoliubov theory does
not seem promising to explain the effect. We demonstrate that much of the
increased binding in the odd-odd system might be understood as a recoupling
energy. This suggests that the DFT should be extended by angular momentum
projection to describe the effect.


title:
Enhancement of $B(E2)$ and low excitation of the second 0$^+$ state near
  N=40 in Ge isotopes

abstract:
  The long-standing problem of dramatic structure change near N=40 in Ge
isotopes is investigated by means of large-scale shell model calculation. The
analysis of simulated calculations suggests a possible understanding of the
problem in terms of rapid increase in the $g_{9/2}$ proton and neutron
occupation. The observed variation in excitation of the second $0^+$ state in
$^{70,72,74}$Ge appears to correlate closely with the $g_{9/2}$ occupations
induced by strong proton-neutron interactions. The enhancement of the $g_{9/2}$
occupancies is probably due to correlations in the $1g2d3s$ shell.


title: Universality of Decay out of Superdeformed Bands in the 190 Mass Region

abstract:
  Superdeformed nuclei in the 190 mass region exhibit a striking universality
in their decay-out profiles. We show that this universality can be explained in
the two-level model of superdeformed decay as related to a strong separation of
energy scales: a higher scale related to the nuclear interactions, and a lower
scale caused by electromagnetic decay. Furthermore, we present the results of
the two-level model for all decays for which sufficient data are known,
including statistical extraction of the matrix element for tunneling through
the potential barrier.


title:
Model dependence of the neutrino-deuteron disintegration cross sections
  at low energies

abstract:
  Model dependence of the reaction rates for the weak breakup of deuterons by
low energy neutrinos is studied starting from the cross sections derived from
potential models and also from pionless effective field theory. Choosing the
spread of the reaction yields, caused basically by the different ways the
two-body currents are treated, as a measure of the model dependent uncertainty,
we conclude that the breakup reactions are $\sim$ 2 - 3 % uncertain, and that
even the ratio of the charged to neutral current reaction rates is also $\sim$
2 % uncertain.


title: More about the Wilsonian analysis on the pionless NEFT

abstract:
  We extend our Wilsonian renormalization group (RG) analysis on the pionless
nuclear effective theory (NEFT) in the two-nucleon sector in two ways; on the
one hand, (1) we enlarge the space of operators up to including those of
$\mathcal{O}(p^4)$ in the $S$ waves, and, on the other hand, (2) we consider
the RG flows in higher partial waves ($P$ and $D$ waves). In the larger space
calculations, we find, in addition to nontrivial fixed points, two ``fixed
lines'' and a ``fixed surface'' which are related to marginal operators. In the
higher partial wave calculations, we find similar phase structures to that of
the $S$ waves, but there are \textit{two} relevant directions in the $P$ waves
at the nontrivial fixed points and \textit{three} in the $D$ waves. We explain
the physical meaning of the $P$-wave phase structure by explicitly calculating
the low-energy scattering amplitude. We also discuss the relation between the
Legendre flow equation which we employ and the RG equation by Birse, McGovern,
and Richardson, and possible implementation of Power Divergence Subtraction
(PDS) in higher partial waves.


title: Elliptic flow in transport theory and hydrodynamics

abstract:
  We present a new direct simulation Monte-Carlo method for solving the
relativistic Boltzmann equation. We solve numerically the 2-dimensional
Boltzmann equation using this new algorithm. We find that elliptic flow from
this transport calculation smoothly converges towards the value from ideal
hydrodynamics as the number of collisions per particle increases, as expected
on general theoretical grounds, but in contrast with previous transport
calculations.


title:
Pion-nucleon scattering within a gauged linear sigma model with
  parity-doubled nucleons

abstract:
  We compute pion-nucleon scattering at tree-level within a gauged linear sigma
model which contains the nucleon and its chiral partner. Such an investigation
in principle allows to make definite predictions as to whether the main
contribution to the nucleon mass comes from the chiral condensate or from the
mixing with its chiral partner. We find that there seems to be no set of model
parameters that allows for a simultaneous description of all experimentally
measured scattering lengths and range parameters. This indicates the need to
improve the dynamical ingredients of the model.


title: J/psi absorption by nucleons in the meson-exchange model

abstract:
  We reinvestigate the $J/\psi$ dissociation processes induced by the reactions
with nucleons, $J/\psi + N \to \bar{D}^{(*)} + \Lambda_c$, in the
meson-exchange model. Main constraints used in this work are vector-meson
dominance and charm vector-current conservation. We show that the cross section
for $J/\psi + N \to \bar{D} + \Lambda_c$ can be larger than that for $J/\psi +
N \to \bar{D}^{*} + \Lambda_c$ when these constraints are imposed. The
dependence of the cross sections on the coupling constants is analyzed in
detail, and the comparison with the recent quark-interchange model predictions
is also made.


title: Nucleon-Nucleon Interaction: A Typical/Concise Review

abstract:
  Nearly a recent century of work is divided to Nucleon-Nucleon (NN)
interaction issue. We review some overall perspectives of NN interaction with a
brief discussion about deuteron, general structure and symmetries of NN
Lagrangian as well as equations of motion and solutions. Meanwhile, the main NN
interaction models, as frameworks to build NN potentials, are reviewed
concisely. We try to include and study almost all well-known potentials in a
similar way, discuss more on various commonly used plain forms for two-nucleon
interaction with an emphasis on the phenomenological and meson-exchange
potentials as well as the constituent-quark potentials and new ones based on
chiral effective field theory and working in coordinate-space mostly. The
potentials are constructed in a way that fit NN scattering data, phase shifts,
and are also compared in this way usually. An extra goal of this study is to
start comparing various potentials forms in a unified manner. So, we also
comment on the advantages and disadvantages of the models and potentials partly
with reference to some relevant works and probable future studies.


title:
Hard and soft probe - medium interactions in a 3D hydro+micro approach
  at RHIC

abstract:
  We utilize a 3D hybrid hydro+micro model for a comprehensive and consistent
description of soft and hard particle production in ultra-relativistic
heavy-ion collisions at RHIC. In the soft sector we focus on the dynamics of
(multi-)strange baryons, where a clear strangeness dependence of their
collision rates and freeze-out is observed. In the hard sector we study the
radiative energy loss of hard partons in a soft medium in the multiple soft
scattering approximation. While the nuclear suppression factor $R_{AA}$ does
not reflect the high quality of the medium description (except in a reduced
systematic uncertainty in extracting the quenching power of the medium), the
hydrodynamical model also allows to study different centralities and in
particular the angular variation of $R_{AA}$ with respect to the reaction
plane, allowing for a controlled variation of the in-medium path-length.


title:
Constraining a possible time variation of the gravitational constant G
  with terrestrial nuclear laboratory data

abstract:
  Testing the constancy of the gravitational constant G has been a longstanding
fundamental question in natural science. As first suggested by Jofr\'{e},
Reisenegger and Fern\'{a}ndez [1], Dirac's hypothesis of a decreasing
gravitational constant $G$ with time due to the expansion of the Universe would
induce changes in the composition of neutron stars, causing dissipation and
internal heating. Eventually, neutron stars reach their quasi-stationary states
where cooling due to neutrino and photon emissions balances the internal
heating. The correlation of surface temperatures and radii of some old neutron
stars may thus carry useful information about the changing rate of G. Using the
density dependence of the nuclear symmetry energy constrained by recent
terrestrial laboratory data on isospin diffusion in heavy-ion reactions at
intermediate energies and the size of neutron skin in $^{208}Pb$ within the
gravitochemical heating formalism, we obtain an upper limit of the relative
changing rate of $|\dot{G}/G|\le4\times 10^{-12}yr^{-1}$ consistent with the
best available estimates in the literature.


title:
Particle number fluctuations in nuclear collisions within excluded
  volume hadron gas model

abstract:
  The multiplicity fluctuations are studied in the van der Waals excluded
volume hadron-resonance gas model. The calculations are done in the grand
canonical ensemble within the Boltzmann statistics approximation. The scaled
variances for positive, negative and all charged hadrons are calculated along
the chemical freeze-out line of nucleus-nucleus collisions at different
collision energies. The multiplicity fluctuations are found to be suppressed in
the van der Waals gas. The numerical calculations are presented for two values
of hard-core hadron radius, $r=0.3$ fm and 0.5 fm, as well as for the upper
limit of the excluded volume suppression effects.


title: Hydrodynamic Description of Heavy Ion Collisions

abstract:
  We give a short review of hydrodynamic models at heavy ion collisions from
the point of view of initial conditions, an equation of states (EoS) and
freezeout process. Then we show our latest results of a combined fully
three-dimensional macroscopic/microscopic transport approach. In this model for
the early, dense, deconfined stage relativistic 3D-hydrodynamics of the
reaction and a microscopic non-equilibrium model for the later hadronic stage
where the equilibrium assumptions are not valid anymore are employed. Within
this approach we study the dynamics of hot, bulk QCD matter, which is being
created in ultra-relativistic heavy ion collisions at RHIC.


title: Bjorken expansion with gradual freeze out

abstract:
  The freeze out of the expanding systems, created in relativistic heavy ion
collisions, will be discussed. We combine kinetic freeze out equations with
Bjorken type system expansion into a unified model. Such a model is a more
physical generalization of the earlier simplified non-expanding freeze out
models. We shall see that the basic freeze out features, pointed out in the
earlier works, are not smeared out by the expansion.


title:
LHC Predictions from an extended theory with Elastic, Inelastic, and
  Path Length Fluctuating Energy Loss

abstract:
  We present the LHC predictions for the WHDG model of radiative, elastic, and
path length fluctuating energy loss. We find the pT dependence of RAA is
qualitatively very different from AWS-based energy loss extrapolations to the
LHC; the large pT reach of the year one data at the LHC should suffice to
distinguish between the two. We also discuss the importance of requiring a
first elastic scatter before any medium-induced elastic or radiative loss
occurs, a necessary physical effect not considered in any previous models.


title:
Effects of isospin and momentum dependent interactions on liquid-gas
  phase transition in hot asymmetric nuclear matter

abstract:
  The liquid-gas phase transition in hot neutron-rich nuclear matter is
investigated within a self-consistent thermal model using an isospin and
momentum dependent interaction (MDI) constrained by the isospin diffusion data
in heavy-ion collisions, a momentum-independent interaction (MID), and an
isoscalar momentum-dependent interaction (eMDYI). The boundary of the
phase-coexistence region is shown to be sensitive to the density dependence of
the nuclear symmetry energy with a softer symmetry energy giving a higher
critical pressure and a larger area of phase-coexistence region. Compared with
the momentum-independent MID interaction, the isospin and momentum-dependent
MDI interaction is found to increase the critical pressure and enlarge the area
of phase-coexistence region. For the isoscalar momentum-dependent eMDYI
interaction, a limiting pressure above which the liquid-gas phase transition
cannot take place has been found and it is shown to be sensitive to the
stiffness of the symmetry energy.


title: Virtues and Flaws of the Pauli Potential

abstract:
  Quantum simulations of complex fermionic systems suffer from a variety of
challenging problems. In an effort to circumvent these challenges, simpler
``semi-classical'' approaches have been used to mimic fermionic correlations
through a fictitious ``Pauli potential''. In this contribution we examine two
issues. First, we address some of the inherent difficulties in a widely used
version of the Pauli potential. Second, we refine such a potential in a manner
consistent with the most basic properties of a cold Fermi gas, such as its
momentum distribution and its two-body correlation function.


title: Electro-disintegration following beta-decay

abstract:
  I show that the disintegration of weakly-bound nuclei and the ionization of
weakly-bound atomic electrons due to their interaction with leptons from beta
decay is a negligible effect.


title: Quark deconfinement transition in hyperonic matter

abstract:
  We discuss the properties of the hadron-quark mixed phase in compact stars
using a realistic equation of state of hyperonic matter and the MIT bag model.
We find that the equation of state of the mixed phase is similar to that given
by the Maxwell construction, but that the mixed phase becomes mechanically
unstable if the surface tension of the interface between the two pure phases is
strong enough. The composition of the mixed phase is very different from that
of the Maxwell construction; in particular, hyperons are completely suppressed.


title: The in-medium $\bar K N$ interaction within a chiral unitary approach

abstract:
  The s- and p-wave contributions to the $\bar K N$ interaction in dense
nuclear matter are obtained using a chiral unitary approach. We perform a
self-consistent calculation of the $\bar K$ self-energy including Pauli
blocking effects, meson self-energies modified by short-range correlations and
baryon binding potentials. We find that the on-shell factorization cannot be
applied to evaluate the in-medium corrections to p-wave amplitudes.
Furthermore, the $\Lambda$ and $\Sigma$ develop a mass shift of -30 MeV at
saturation density while the $\Sigma^*$ width increases to 80 MeV. We conclude
that no deep and narrow $\bar K$ bound states could be observed.


title:
Local versus nonlocal $\alpha\alpha$ interactions in $3\alpha$
  description of $^{12}$C

abstract:
  Local $\alpha \alpha$ potentials fail to describe $^{12}$C as a $3\alpha$
system. Nonlocal $\alpha \alpha$ potentials that renormalize the
energy-dependent kernel of the resonating group method allow interpreting
simultaneously the ground state and $0^+_2$ resonance of $^{12}$C as $3\alpha$
states. A comparison with fully microscopic calculations provides a measure of
the importance of three-cluster exchanges in those states.


title: The Delta N -> NN transition in finite nuclei

abstract:
  We perform a direct finite nucleus calculation of the partial width of a
bound Delta isobar decaying through the non-mesonic decay mode, Delta N -> NN.
This transition is modeled by the exchange of the long ranged pi meson and the
shorter ranged rho meson. The contribution of this decay channel is found to be
approximately 60 % of the decay width of the Delta particle in free space.
Considering the additional pionic decay mode, we conclude that the total decay
width of a bound Delta resonance in nuclei is of the order of 100 MeV and,
consequently, no narrow Delta nuclear states exist, contrary to recent claims
in the literature. Our results are in complete agreement with microscopic
many-body calculations and phenomenological approaches performed in nuclear
matter.


title:
Superscaling in dilute Fermi gas and its relation to general properties
  of the nucleon momentum distribution in nuclei

abstract:
  The superscaling observed in inclusive electron scattering is described
within the dilute Fermi gas model with interaction between the particles. The
comparison with the relativistic Fermi gas (RFG) model without interaction
shows an improvement in the explanation of the scaling function $f(\psi ')$ in
the region $\psi ' < -1$, where the RFG result is $f(\psi ') = 0$. It is found
that the behavior of $f(\psi ')$ for $\psi ' < -1$ depends on the particular
form of the general power-law asymptotics of the momentum distribution
$n(k)\sim 1/ k^{4+m}$ at large $k$. The best agreement with the empirical
scaling function is found for $m\simeq 4.5$ in agreement with the asymptotics
of $n(k)$ in the coherent density fluctuation model where $m = 4$. Thus,
superscaling gives information about the asymptotics of $n(k)$ and the NN
forces.


title: Equation of State of Nuclear Matter at high baryon density

abstract:
  A central issue in the theory of astrophysical compact objects and heavy ion
reactions at intermediate and relativistic energies is the Nuclear Equation of
State (EoS). On one hand, the large and expanding set of experimental and
observational data is expected to constrain the behaviour of the nuclear EoS,
especially at density above saturation, where it is directly linked to
fundamental processes which can occur in dense matter. On the other hand,
theoretical predictions for the EoS at high density can be challenged by the
phenomenological findings. In this topical review paper we present the
many-body theory of nuclear matter as developed along different years and with
different methods. Only nucleonic degrees of freedom are considered. We compare
the different methods at formal level, as well as the final EoS calculated
within each one of the considered many-body schemes. The outcome of this
analysis should help in restricting the uncertainty of the theoretical
predictions for the nuclear EoS.


title: Improved di-neutron cluster model for 6He scattering

abstract:
  The structure of the three-body Borromean nucleus 6He is approximated by a
two-body di-neutron cluster model. The binding energy of the 2n-\alpha system
is determined to obtain a correct description of the 2n-\alpha coordinate, as
given by a realistic three-body model calculation. The model is applied to
describe the break-up effects in elastic scattering of 6He on several targets,
for which experimental data exist. We show that an adequate description of the
di-neutron-core degree of freedom permits a fairly accurate description of the
elastic scattering of 6He on different targets.


title:
The Unitary Correlation Operator Method from a Similarity
  Renormalization Group Perspective

abstract:
  We investigate how the Unitary Correlation Operator Method (UCOM), developed
to explicitly describe the strong short-range central and tensor correlations
present in the nuclear many-body system, relates to the Similarity
Renormalization Group (SRG), a method to band-diagonalize Hamiltonians by
continuous unitary transformations. We demonstrate how the structure of the
UCOM transformation, originally motivated from the physically intuitive picture
of correlations in coordinate space, arises naturally from the SRG flow
equation. Apart from formal considerations we show that the momentum space
matrix elements of the effective interactions obtained in both schemes agree
extremely well.


title: Exact boson mapping of the reduced BCS pairing Hamiltonian

abstract:
  An exact boson mapping of the reduced BCS (equal strength) pairing
Hamiltonian is considered. In the mapping, fermion pair operators are mapped
exactly to the corresponding bosons. The image of the mapping results in a
Bose-Hubbard model with level dependent hopping. Though the resultant
Bose-Hubbard Hamiltonian is non-Hermitian, all eigenvalues are real when Uk/t<
1, where k is the total number of bosons. When U/t=1, a part of spectrum of the
Bose-Hubbard Hamiltonian corresponds exactly to the whole spectrum of the
reduced BCS pairing Hamiltonian.


title: Strangeness-Conserving Hadronic Parity Violation at Low Energies

abstract:
  The parity-violating nucleon-nucleon interaction is the key to understanding
the strangeness-conserving hadronic weak interaction at low energies. In this
brief talk, I review the past accomplishments in and current status of this
subject, and outline a new joint effort between experiment and theory that
tries to address the potential problems in the past by focusing on parity
violation in few-nucleon systems and using the language of effective field
theory.


title: On the ground--state energy of finite Fermi systems

abstract:
  We study the ground--state shell correction energy of a fermionic gas in a
mean--field approximation.
  Considering the particular case of 3D harmonic trapping potentials, we show
the rich variety of different behaviors (erratic, regular, supershells) that
appear when the number--theoretic properties of the frequency ratios are
varied. For self--bound systems, where the shape of the trapping potential is
determined by energy minimization, we obtain accurate analytic formulas for the
deformation and the shell correction energy as a function of the particle
number $N$. Special attention is devoted to the average of the shell correction
energy. We explain why in self--bound systems it is a decreasing (and negative)
function of $N$.


title:
Realistic two-nucleon potentials for the relativistic two-nucleon
  Schroedinger equation

abstract:
  The potentials $V (v)$ in the nonrelativistic (relativistic) nucleon-nucleon
(NN) Schroedingerequation are related by a quadratic equation. That equation is
numerically solved, thus providing phase equivalent v- potentials related for
instance to the high precision NN potentials, which are adjusted to NN phase
shift and mixing parameters in a nonrelativistic Schroedinger equation. The
relativistic NN potentials embedded in a three-nucleon (3N)system for total NN
momenta different from zero are also constructed in a numerically precise
manner. They enter into the relativistic interacting 3N mass operator, which is
needed for relativistic 3N calculations for bound and scattering states.


title: Structure of low-lying 12C-resonances

abstract:
  The hyperspherical adiabatic expansion is combined with complex scaling and
used to calculate low-lying nuclear resonances of $^{12}$C in the
$3\alpha$-model. We use Ali-Bodmer potentials and compare results for other
potentials $\alpha-\alpha$ with similar $^{8}$Be-properties. A three-body
potential is used to adjust the $^{12}$C-resonance positions to desired values
extending the applicability of the method to many-body systems decaying into
three $\alpha$-particles. For natural choices of three-body potentials we find
14 resonances below the proton separation threshold, i.e. two $0^{+}$, three
$2^{+}$, two $4^{+}$, one of each of $1^{\pm}$, $2^{-}$, $3^{\pm}$, $4^{-}$,
and $6^{+}$. The partial wave decomposition of each resonance is calculated as
function of hyperradius. Strong variation is found from small to large
distance. Connection to previous experimental and theoretical results are
discussed and agreements as well as disagreements are emphasized.


title: Remarks on N N -> N N pi beyond leading order

abstract:
  In recent years a two-scale expansion was established to study reactions of
the type N N -> N N pi within chiral perturbation theory. Then the diagrams of
some subclasses that are invariant under the choice of the pion field no longer
appear at the same chiral order. In this letter we show that the proposed
expansion still leads to well defined results. We also discuss the appropriate
choice of the heavy baryon propagator.


title: Exotic fission properties of highly neutron-rich Uranium isotopes

abstract:
  The series of Uranium isotopes with $N=154 \sim 172$ around the magic number
N=162/164 are identified to be thermally fissile. The thermal neutron fission
of a typical representative $^{249}$U of this region amenable to synthesis in
the radioactive ion beam facilities is considered here. Semiempirical study of
fission barrier height and width shows this nucleus to be infinitely stable
against spontaneous fission due to increase in barrier width arising out of
excess neutrons. Calculation of probability of fragment mass yields and
microscopic study in relativistic mean field theory, show this nucleus to
undergo a new mode of thermal fission decay termed {\it multifragmentation
fission} where a number of prompt scission neutrons are simultaneously released
along with the two heavy fission fragments.


title:
Quark-quark Double Scattering and Modified (Anti-)Quark Fragmentation
  Functions in Nuclei

abstract:
  Quark-quark double scattering in eA DIS and its contribution to quark and
anti-quark fragmentation functions are investigated with the generalized
factorization of the relevant twist-four processes in pQCD. It is shown that
the resulting modifications to quark and anti-quark fragmentation functions are
different. While the numerical size of these effects cannot be determined from
pQCD, the structure of our result leads to a number of qualitative predictions
for the relative size of the effect for different hadrons. These qualitative
predictions agree with the multiplicity ratios for positive and negative
hadrons as observed by HERMES.


title:
Charged current anti-neutrino reactions from $^{12}$C at MiniBooNE
  energies

abstract:
  A study of charged current induced anti-neutrino interactions from nuclei has
been done for the intermediate energy ($<2$GeV) anti-neutrinos and applied to
$^{12}$C, relevant for ongoing experiment by MiniBooNE collaboration. The
calculations have been done for the quasielastic and inelastic lepton
production as well as for the incoherent and the coherent pion production
processes. The calculations are done in local density approximation. In the
case of the quasielastic reaction the effects of Pauli blocking, Fermi motion
effects, renormalization of weak transition strengths in nuclear medium and the
Coulomb distortion of the outgoing lepton have been taken into account. For the
inelastic processes the calculations have been done in the $\Delta$ dominance
model and take into account the effect of Pauli blocking, Fermi motion of the
nucleon and renormalization of $\Delta$ properties in a nuclear medium. The
effect of final state interactions of pions is also taken into account. The
numerical results for the total cross sections for the charged current
quasielastic scattering and incoherent pion production processes are compared
with earlier experimental results available in Freon and Freon-Propane. It is
found that nuclear medium effects give strong reduction in the cross sections
leading to satisfactory agreement with the available data.


title:
Spin distribution of nuclear levels using static path approximation with
  random-phase approximation

abstract:
  We present a thermal and quantum-mechanical treatment of nuclear rotation
using the formalism of static path approximation (SPA) plus random-phase
approximation (RPA). Naive perturbation theory fails because of the presence of
zero-frequency modes due to dynamical symmetry breaking. Such modes lead to
infrared divergences. We show that composite zero-frequency excitations are
properly treated within the collective coordinate method. The resulting
perturbation theory is free from infrared divergences. Without the assumption
of individual random spin vectors, we derive microscopically the spin
distribution of the level density. The moment of inertia is thereby related to
the spin-cutoff parameter in the usual way. Explicit calculations are performed
for 56^Fe; various thermal properties are discussed. In particular, we
demonstrate that the increase of the moment of inertia with increasing
temperature is correlated with the suppression of pairing correlations.


title:
Is there model-independent evidence of the two-photon-exchange effect in
  the electron-proton elastic scattering cross section?

abstract:
  We re-analyze the data of the elastic electron proton scattering to look for
model-independent evidence of the two-photon-exchange (TPE) effect. In contrast
to previous analyses, TPE effect is parametrized in forms which are free of
kinematical-singularity, in addition to being consistent with the constraint
derived from crossing symmetry and the charge conjugation. Moreover, we fix the
value of $R=G_E/G_M$ as determined from the data of the polarization transfer
experiment. We find that, at high $Q^2 \geq 2 GeV^2$ values, the contribution
of the TPE effect to the slope of $\sigma_R$ vs. $\epsilon$ is large and
comparable with that arising from $G_{E}$. It also behaves quasi-linearly in
the region of current data, namely, in the range of $0.2 < \epsilon < 0.95$.
Hence the fact that the current elastic $ep$ cross section data shows little
nonlinearity with respect to $\epsilon$ can not be used to exclude the presence
of the TPE effect. More precise data at extreme angles will be crucial for a
model-independent extraction of the TPE effect.


title: Resonant relativistic corrections and the A_y problem

abstract:
  We study relativistic corrections to nuclear interactions caused by boosting
the two-nucleon interaction to a frame in which their total momentum does not
vanish. These corrections induce a change in the computed value of the
neutron-deuteron analyzing power A_y that is estimated using the plane-wave
impulse approximation. This allows a transparent analytical calculation that
demonstrates the significance of relativistic corrections. Faddeev calculations
are however needed to conclude on the A_y puzzle.


title:
Jet modification in three dimensional fluid dynamics at next-to-leading
  twist

abstract:
  The modification of the single inclusive spectrum of high transverse momentum
($p_T $) pions emanating from an ultra-relativistic heavy-ion collision is
investigated. The deconfined sector is modelled using a full three dimensional
(3-D) ideal fluid dynamics simulation. Energy loss of high $p_T$ partons and
the ensuing modification of their fragmentation is calculated within
perturbative QCD at next-to-leading twist, where the magnitude of the higher
twist contribution is modulated by the entropy density extracted from the 3-D
fluid dynamics simulation. The nuclear modification factor ($R_{AA}$) for pions
with a $p_T \geq 8$ GeV as a function of centrality as well as with respect to
the reaction plane is calculated. The magnitude of contributions to the
differential $R_{AA}$ within small angular ranges, from various depths in the
dense matter is extracted from the calculation and demonstrate the correlation
of the length integrated density and the $R_{AA}$ from a given depth. The
significance of the mixed and hadronic phase to the overall magnitude of energy
loss are explored.


title: Inclusive electron scattering off 4He

abstract:
  Inclusive electron scattering off 4He is investigated for low and medium
energy and momentum transfers. The final state interaction, given by the simple
semirealistic Malfliet-Tjon potential, is treated rigorously applying the
Lorentz Integral Transform (LIT) method. Besides the nonrelativistic one-body
current a consistent meson exchange current is constructed and implemented.
Results are presented for both longitudinal and transverse response functions
at various momentum transfers. Good agreement with experimental data is found
for the longitudinal response function, while some strength is missing in the
transverse response function on the low-energy side of the quasi-elastic peak.


title: Initial-State Coulomb Interaction in the dd -> alpha pi^0 Reaction

abstract:
  The effects of initial-state Coulomb interactions in the
charge-symmetry-breaking reaction dd -> alpha pi^0 are investigated within a
previously published formalism. This is a leading order effect in which the
Coulomb interaction between the two initial state protons leads to the breakup
of the two deuterons into a continuum state that is well connected to the final
alpha pi^0 state by the strong emission of a pion. As a first step, we use a
simplified set of d and alpha wave functions and a plane-wave approximation for
the initial dd state. This Coulomb mechanism, by itself, yields cross sections
that are much larger than the experimental ones, and which are comparable in
size to the contributions from other mechanisms. Inclusion of this mechanism is
therefore necessary in a realistic calculation.


title: From QCD to nuclear matter saturation

abstract:
  We discuss a relativistic chiral theory of nuclear matter with $\sigma$ and
$\omega$ exchange using a formulation of the $\sigma$ model in which all the
chiral constraints are automatically fulfilled. We establish a relation between
the nuclear response to the scalar field and the QCD one which includes the
nucleonic parts. It allows a comparison between nuclear and QCD information.
Going beyond the mean field approach we introduce the effects of the pion loops
supplemented by the short-range interaction. The corresponding Landau-Migdal
parameters are taken from spin-isospin physics results. The parameters linked
to the scalar meson exchange are extracted from lattice QCD results. These
inputs lead to a reasonable description of the saturation properties,
illustrating the link between QCD and nuclear physics. We also derive from the
corresponding equation of state the density dependence of the quark condensate
and of the QCD susceptibilities.


title:
Multichannel oscillations and relations between LSND, KARMEN and
  MiniBooNE, with and without CP violation

abstract:
  We show by examples that multichannel mixing can affect both the parameters
extracted from neutrino oscillation experiments, and that more general
conclusions derived by fitting the experimental data under the assumption that
only two channels are involved in the mixing. Implications for MiniBooNE are
noted and an example based on maximal CP violation displays profound
implications for the two data sets (muon-neutrino and muon-antineutrino) of
that experiment.


title:
An evaporation-based model of thermal neutron induced ternary fission of
  plutonium

abstract:
  Ternary fission probabilities for thermal neutron induced fission of
plutonium are analyzed within the framework of an evaporation-based model where
the complexity of time-varying potentials, associated with the neck collapse,
are included in a simplistic fashion. If the nuclear temperature at scission
and the fission-neck-collapse time are assumed to be ~1.2 MeV and ~10^-22 s,
respectively, then calculated relative probabilities of ternary-fission
light-charged-particle emission follow the trends seen in the experimental
data. The ability of this model to reproduce ternary fission probabilities
spanning seven orders of magnitude for a wide range of light-particle charges
and masses implies that ternary fission is caused by the coupling of an
evaporation-like process with the rapid re-arrangement of the nuclear fluid
following scission.


title: Energy Thresholds of Stability of Three-Particle Systems

abstract:
  We have studied the general properties of the energy thresholds of stability
for a three-particle system with short-range interaction. A wide region of the
interaction constants and various ratios of the masses of particles are
considered. The specific effects characteristic of the near-threshold
stationary energy levels of three particles are revealed. The asymptotic
estimates are obtained for the thresholds at some limiting cases, and the
high-precision variational calculations of the thresholds for various values of
the interaction constants and the masses of particles are carried out.


title:
Nucleon-nucleus scattering as a test of shell structure of some light
  mass exotic nuclei

abstract:
  Shell model wave functions have been used to form microscopic g-folding
optical potentials with which elastic scattering data from 8He, 10,11C, and
18,20,22O scattering on hydrogen has been analyzed. Those potentials, the
effective two-nucleon interaction used in their formation, and the shell model
details, then have been used in distorted wave approximation calculations of
differential cross sections from inelastic scattering to the first excited
states of five of those radioactive ions.


title: Viscous fluid dynamics

abstract:
  We briefly discuss the phenomenological theory of dissipative fluid. We also
present some numerical results for hydrodynamic evolution of QGP fluid with
dissipation due to shear viscosity only. Its effect on particle production is
also studied.


title: Pion reactions on two--nucleon systems

abstract:
  We review recent progress in our understanding of elastic and inelastic pion
reactions on two nucleon systems from the point of view of effective field
theory. The discussion includes pion-deuteron scattering, gamma d to pi-nn, and
NN to NNpi. At the end some remarks are made on strangeness production
reactions.


title: Dissipative hydrodynamics in 2+1 dimensions

abstract:
  In a first order theory of dissipative hydrodynamics, we have simulated
hydrodynamic evolution of QGP fluid with dissipation due to shear viscosity
only. Simulation confirms that compared to an ideal fluid, energy density or
temperature of a viscous fluid evolve slowly. Transverse expansion is also more
in viscous fluid. We also study the effect of viscosity on particle production.
Particle production is enhanced, more at large $p_T$. The elliptic flow on the
otherhand decreases and shows a tendency to saturate at large $p_T$.


title: Microscopic Calculation of Fusion Cross-Sections

abstract:
  A microscopic calculation of cross sections for fusion of oxygen isotopes
$^{16}$O, $^{22}$O and $^{24}$O is presented. Fermionic Molecular Dynamics wave
functions are used to describe the fully antisymmetrized and angular momentum
projected nucleus-nucleus system. The same effective nucleon-nucleon
interaction is used to determine the ground state properties of the nuclei as
well as the nucleus-nucleus interaction. From the microscopic many-body wave
function the corresponding wave function for the relative motion of two
point-like nuclei is derived by a method proposed by Friedrich which leads to a
local effective nucleus-nucleus potential. Finally the Schr{\"o}dinger equation
with incoming wave boundary conditions is solved to obtain the penetration
factors for the different partial waves. With these the S-factor for the fusion
process is calculated. A good agreement with experimental data is obtained for
the $^{16}$O-$^{16}$O cross section. Much enhanced cross sections are found for
the neutron-rich oxygen isotopes.


title:
Elliptic flow fluctuations in heavy ion collisions at RHIC and the
  perfect fluid hypothesis

abstract:
  We analyse the recently measured $v_2$ fluctuation in the context of
establishing the degree of fluidity of the matter produced in heavy ion
collisions. We argue that flow observables within systems with a non-negligible
mean free path should acquire a "dynamical" fluctuation, due to the random
nature of each collision between the system's degrees of freedom. Because of
this, $v_2$ fluctuations can be used to estimate the Knudsen number of the
system produced at RHIC. To illustrate this quantitatively, we apply the UrQMD
model, with scaled cross sections, to show that collisions at RHIC have a
Knudsen number at least one order of magnitude above the expected value for an
interacting hadron gas. Furthermore, we argue that the Knudsen number is also
bound from above by the $v_2$ fluctuation data, because too large a Knudsen
number would break the observed scaling of $v_2$ fluctuations due to the onset
of turbulent flow. We propose, therefore that $v_2$ fluctuation measurements,
together with an understanding of the turbulent regime for relativistic
hydrodynamics, will provide an upper as well as a lower limit for the Knudsen
number.


title: Hadron-hadron correlations at low and high $p_T$ in heavy-ion collisions

abstract:
  The modification of two particle correlations within a jet due to its
propagation through dense strongly interacting matter is explored. Different
properties of the medium may be probed by varying the momentum of the detected
hadrons. Very high transverse momentum ($p_T$) correlations sample the gluon
density of the medium; the minimal modification on the same side as the trigger
is consistent with the picture and parameters of partonic energy loss. Lower
momentum hadrons, sensitive to the presence of composite structures in the
medium may excite collective modes such as Cherenkov radiation, resulting in
conical patterns in the detected correlations.


title:
Large-scale prediction of the parity distribution in the nuclear level
  density and application to astrophysical reaction rates

abstract:
  A generalized method to calculate the excitation-energy dependent parity
ratio in the nuclear level density is presented, using the assumption of
Poisson distributed independent quasi particles combined with BCS occupation
numbers. It is found that it is crucial to employ a sufficiently large model
space to allow excitations both from low-lying shells and to higher shells
beyond a single major shell. Parity ratios are only found to equilibrate above
at least 5-10 MeV of excitation energy. Furthermore, an overshooting effect
close to major shells is found where the parity opposite to the ground state
parity may dominate across a range of several MeV before the parity ratio
finally equilibrates. The method is suited for large-scale calculations as
needed, for example, in astrophysical applications. Parity distributions were
computed for all nuclei from the proton dripline to the neutron dripline and
from Ne up to Bi. These results were then used to recalculate astrophysical
reaction rates in a Hauser-Feshbach statistical model. Although certain
transitions can be considerably enhanced or suppressed, the impact on
astrophysically relevant reactions remains limited, mainly due to the thermal
population of target states in stellar reaction rates.


title: Magnetic Phases in Three-Flavor Color Superconductivity

abstract:
  The best natural candidates for the realization of color superconductivity
are quark stars -not yet confirmed by observation- and the extremely dense
cores of compact stars, many of which have very large magnetic fields. To
reliably predict astrophysical signatures of color superconductivity, a better
understanding of the role of the star's magnetic field in the color
superconducting phase that realizes in the core is required. This paper is an
initial step in that direction. The field scales at which the different
magnetic phases of a color superconductor with three quark flavors can be
realized are investigated. Coming from weak to strong fields, the system
undergoes first a symmetry transmutation from a Color-Flavor-Locked (CFL) phase
to a Magnetic-CFL (MCFL) phase, and then a phase transition from the MCFL phase
to the Paramagnetic-CFL (PCFL) phase. The low-energy effective theory for the
excitations of the diquark condensate in the presence of a magnetic field is
derived using a covariant representation that takes into account all the
Lorentz structures contributing at low energy. The field-induced masses of the
charged mesons and the threshold field at which the CFL $\to$ MCFL symmetry
transmutation occurs are obtained in the framework of this low-energy effective
theory. The relevance of the different magnetic phases for the physics of
compact stars is discussed.


title:
Origin of $2_1^+$ Excitation Energy Dependence on Valence Nucleon
  Numbers

abstract:
  It has been shown recently that a simple formula in terms of the valence
nucleon numbers and the mass number can describe the essential trends of
excitation energies of the first $2^+$ states in even-even nuclei. By
evaluating the first order energy shift due to the zero-range residual
interaction, we find that the factor which reflects the effective particle
number participating in the interaction from the Fermi orbit governs the main
dependence of the first $2^+$ excitation energy on the valence nucleon numbers.


title: Neutrino-nucleus interactions at low energies within Fermi-liquid theory

abstract:
  Cross sections are calculated for neutrino scattering off heavy nuclei at
energies below 50 MeV. The theory of Fermi liquid is applied to estimate the
rate of neutrino-nucleon elastic and inelastic scattering in a nuclear medium
in terms of dynamic form factors. The cross sections, obtained here in a rather
simple way, are in agreement with the results of the other much more
sophisticated nuclear models. A background rate from the solar neutrino
interactions within a large Ge detector is estimated in the above-mentioned
approach. The knowledge of the rate is in particular rather important for
new-generation large-scale neutrino experiments.


title:
Calculation of the $^3$He(in-flight $K^-$,$n$) reaction for searching
  the deeply-bound $K^-pp$ state

abstract:
  The formation of a deeply-bound $K^-pp$ state by the $^3$He(in-flight
$K^-$,$n$) reaction is investigated theoretically in the distorted-wave impulse
approximation using the Green's function method. The expected inclusive and
semi-exclusive spectra at $p_{K^-}$ = 1.0 GeV/c and $\theta_n = 0^{\circ}$ are
calculated for the forthcoming J-PARC E15 experiment. We employ optical
potentials between the $K^-$ and ``$pp$'' core-nucleus, and demonstrate
systematically the dependence of the spectral shape on $V_0$ and $W_0$, which
are the real and imaginary parts of the strength for the optical potential,
respectively. The necessary condition to observe a distinct peak of the $K^-pp$
bound state with $I=1/2$, $J^\pi=0^-$ in the spectrum turns out to be that the
value of $V_0$ is deeper than $\sim-100$ MeV and $W_0$ shallower than
$\sim-100$ MeV, of which the strength parameters come up to recent theoretical
predictions.