title:
Precision Pion-Proton Elastic Differential Cross Sections at Energies
  Spanning the Delta Resonance

abstract:
  A precision measurement of absolute pi+p and pi-p elastic differential cross
sections at incident pion laboratory kinetic energies from T_pi= 141.15 to
267.3 MeV is described. Data were obtained detecting the scattered pion and
recoil proton in coincidence at 12 laboratory pion angles from 55 to 155
degrees for pi+p, and six angles from 60 to 155 degrees for pi-p. Single arm
measurements were also obtained for pi+p energies up to 218.1 MeV, with the
scattered pi+ detected at six angles from 20 to 70 degrees. A flat-walled,
super-cooled liquid hydrogen target as well as solid CH2 targets were used. The
data are characterized by small uncertainties, ~1-2% statistical and ~1-1.5%
normalization. The reliability of the cross section results was ensured by
carrying out the measurements under a variety of experimental conditions to
identify and quantify the sources of instrumental uncertainty. Our lowest and
highest energy data are consistent with overlapping results from TRIUMF and
LAMPF. In general, the Virginia Polytechnic Institute SM95 partial wave
analysis solution describes our data well, but the older Karlsruhe-Helsinki PWA
solution KH80 does not.


title: Multiplicity Distributions and Charged-neutral Fluctuations

abstract:
  Results from the multiplicity distributions of inclusive photons and charged
particles, scaling of particle multiplicities, event-by-event multiplicity
fluctuations, and charged-neutral fluctuations in 158$\cdot A$ GeV Pb+Pb
collisions are presented and discussed. A scaling of charged particle
multiplicity as $N_{part}^{1.07\pm 0.05}$ and photons as $N_{part}^{1.12\pm
0.03}$ have been observed, indicating violation of naive wounded nucleon model.
The analysis of localized charged-neutral fluctuation indicates a
model-independent demonstration of non-statistical fluctuations in both charged
particles and photons in limited azimuthal regions. However, no correlated
charged-neutral fluctuations are observed.


title:
Information on antiprotonic atoms and the nuclear periphery from the
  PS209 experiment

abstract:
  In the PS209 experiments at CERN two kinds of measurements were performed:
the in-beam measurement of X-rays from antiprotonic atoms and the
radiochemical, off-line determination of the yield of annihilation products
with mass number A_t -1 (less by 1 than the target mass). Both methods give
observables which allows to study the peripheral matter density composition and
distribution.


title: Evidence for Spinodal Decomposition in Nuclear Multifragmentation

abstract:
  Multifragmentation of a ``fused system'' was observed for central collisions
between 32 MeV/nucleon 129Xe and natSn. Most of the resulting charged products
were well identified thanks to the high performances of the INDRA 4pi array.
Experimental higher-order charge correlations for fragments show a weak but non
ambiguous enhancement of events with nearly equal-sized fragments. Supported by
dynamical calculations in which spinodal decomposition is simulated, this
observed enhancement is interpreted as a ``fossil'' signal of spinodal
instabilities in finite nuclear systems.


title: Isotopic Scaling in Nuclear Reactions

abstract:
  A three parameter scaling relationship between isotopic distributions for
elements with Z$\leq 8$ has been observed that allows a simple description of
the dependence of such distributions on the overall isospin of the system. This
scaling law (termed iso-scaling) applies for a variety of reaction mechanisms
that are dominated by phase space, including evaporation, multifragmentation
and deeply inelastic scattering. The origins of this scaling behavior for the
various reaction mechanisms are explained. For multifragmentation processes,
the systematics is influenced by the density dependence of the asymmetry term
of the equation of state.


title:
Model-independent source imaging using two-pion correlations in 2 to 8A
  GeV Au + Au collisions

abstract:
  We report a particle source imaging analysis based on two-pion correlations
in high multiplicity Au + Au collisions at beam energies between 2 and 8A GeV.
We apply the imaging technique introduced by Brown and Danielewicz, which
allows a model-independent extraction of source functions with useful accuracy
out to relative pion separations of about 20 fm. The extracted source functions
have Gaussian shapes. Values of source functions at zero separation are almost
constant across the energy range under study. Imaging results are found to be
consistent with conventional source parameters obtained from a multidimensional
HBT analysis.


title:
Quadrupole moments of high-spin isomers: test of the tilted-axis
  cranking model

abstract:
  We report the results of recent measurements of the spectroscopic quadrupole
moments of high-spin isomers. For the K=35/2- five-quasiparticle isomer in 179W
we measured Q_s=4.00(+0.83)(-1.06)eb. It corresponds to a smaller deformation
compared to the ground states of the W isotopes and is in disagreement with the
current theoretical predictions. We also measured the quadrupole moment of the
I=11- isomer in 196Pb, Q_s=(-)3.41(66)eb. It has the same proton s(-2)1/2 h9/2
i13/2 configuration as the one suggested for the I=16- magnetic bandhead which
allows to deduce the quadrupole moment of the 16- state as Q_s=-0.316(97)eb.
This small value proves the near sphericity of the bandhead.


title: Helicity Signatures in Subthreshold rho Production on Nuclei

abstract:
  We report a helicity analysis of subthreshold rho production on 2H and 12C
nuclei at low photoproduction energies and large |t|. The results are
indicative of a large longitudinal rho polarization (l=1, m=0) and are
consistent with a strong helicity-flip mechanism of rho production. The
analysis is model-independent and supports the large mass shift reported from
the earlier 3He experiments.


title:
The population of deformed bands in $^{48}$Cr by emission of $^{8}$Be
  from the $^{32}$S + $^{24}$Mg reaction

abstract:
  Using particle-$\gamma$ coincidences we have studied the population of final
states after the emission of 2 $\alpha$-particles and of $^{8}$Be in nuclei
formed in $^{32}$S+$^{24}$Mg reactions at an energy of $\textrm{E}_{\rm
L}(^{32}\textrm{S}) = 130 {\rm MeV}$. The data were obtained in a setup
consisting of the GASP $\gamma$-ray detection array and the multidetector array
ISIS. Particle identification is obtained from the $\Delta$E and E signals of
the ISIS silicon detector telescopes, the $^{8}$Be being identified by the
instantaneous pile up of the $\Delta$E and E pulses. $\gamma$-ray decays of the
$^{48}$Cr nucleus are identified with coincidences set on 2 $\alpha$-particles
and on $^{8}$Be. Some transitions of the side-band with $K^\pi=4^{-}$ show
stronger population for $^{8}$Be emission relative to that of 2
$\alpha$-particles (by a factor $1.5-1.8$). This observation is interpreted as
due to an enhanced emission of $^{8}$Be into a more deformed nucleus.
Calculations based on the extended Hauser-Feshbach compound decay formalism
confirm this observation quantitatively.


title: Systematic Study of Au-Au Collisions with AGS Experiment E917

abstract:
  The systematics of baryon stopping and strange particle production have been
studied in Au+Au collisions at 6, 8, and 10.8 GeV per nucleon with AGS
experiment E917. In particular, the systematic behavior of the proton yields,
phi meson production, and the yields of antilambdas and antiprotons are
examined as functions of beam energy and centrality.


title: Resonance Studies at STAR

abstract:
  We report on the observed signals of ${K^{\star0}(892)}\to\pi K$ and
$\phi(1020)\to K^{+}K^{-}$ using the mixed-event method with powerful
statistics from the large acceptance and highly efficient STAR TPC. Preliminary
results from the first observation of such states from the year-one STAR data
in $\sqrt{s_{NN}}=130$ GeV Au-Au collisions are presented. The
$K^{\star0}/h^{-}$ ratios with an assumed $K^{\star0}$ $p_{T}$ inverse slope of
300MeV are compatible with that from pp at ISR. For 14% central Au+Au
collisions, we observe $K^{\star0}/h^{-}=0.060\pm0.007(stat)$ and
$\bar{K^{\star0}}/h^{-}=0.058\pm0.007(stat)$. We show that
$\bar{\Lambda}/\Lambda=0.77\pm0.07(stat)$ from this method is consistent with
the measurement via decay topology.


title: Event Texture Search for Critical Fluctuations in Pb+Pb Collisions

abstract:
  NA44 uses a 512 channel Si pad array covering $1.5 <\eta < 3.3$ to study
charged hadron production in 158 A GeV Pb+Pb collisions at the CERN SPS. We
apply a multiresolution analysis, based on a Discrete Wavelet Transformation,
to probe the texture of particle distributions event-by-event, by simultaneous
localization of features in space and scale. Scanning a broad range of
multiplicities, we look for a possible critical behaviour in the power spectra
of local density fluctuations. The data are compared with detailed simulations
of detector response, using heavy ion event generators, and with a reference
sample created via event mixing. An upper limit is set on the probability and
magnitude of dynamical fluctuations.


title:
Electromagnetic Dissociation of 8B and the Rate of the 7Be(p,gamma)8B
  Reaction in the Sun

abstract:
  In an effort to better determine the 7Be(p,gamma)8B reaction rate, we have
performed inclusive and exclusive measurements of the Coulomb dissociation of
8B. The former was a study of longitudinal momentum distributions of 7Be
fragments emitted in the Coulomb breakup of intermediate energy 8B beams on Pb
and Ag targets. Analysis of these data yielded the E2 contribution to the
breakup cross section. In the exclusive measurement, we determined the cross
section for the Coulomb breakup of 8B on Pb at low relative energies in order
to infer the astrophysical S factor for the 7Be(p,gamma)8B reaction.
Interpreting the measurements with 1st-order perturbation theory, we obtained
SE2/SE1 = 4.7 (+ 2.0,- 1.3) times 10^-4 at Erel = 0.6 MeV, and S17(0) = 17.8 (+
1.4,- 1.2) eV b. Semiclassical 1st-order perturbation theory and fully quantum
mechanical continuum-discretized coupled channels analyses yield nearly
identical results for the E1 strength relevant to solar neutrino flux
calculations, suggesting that theoretical reaction mechanism uncertainties need
not limit the precision of Coulomb breakup determinations of the 7Be(p,gamma)8B
S factor. A recommended value of S17(0) based on a weighted average of this and
other measurements is presented.


title:
Self energies of the pion and the delta isobar from the
  ^3He(e,e'pi^+)^3H reaction

abstract:
  In a kinematically complete experiment at the Mainz microtron MAMI, pion
angular distributions of the $^3$He(e,e'$\pi^+)^3$H reaction have been measured
in the excitation region of the $\Delta$ resonance to determine the
longitudinal ($L$), transverse ($T$), and the $LT$ interference part of the
differential cross section. The data are described only after introducing
self-energy modifications of the pion and $\Delta$-isobar propagators. Using
Chiral Perturbation Theory (ChPT) to extrapolate the pion self energy as
inferred from the measurement on the mass shell, we deduce a reduction of the
$\pi^+$ mass of $\Delta m_{\pi^+} = (-1.7^{+ 1.7}_{- 2.1})$ MeV/c$^2$ in the
neutron-rich nuclear medium at a density of $\rho = (0.057^{+ 0.085}_{-
0.057})$ fm$^{-3}$. Our data are consistent with the $\Delta$ self energy
determined from measurements of $\pi^0$ photoproduction from $^4$He and heavier
nuclei.


title:
Production of A=6,7 Nuclides in the Alpha + Alpha Reaction and Cosmic
  Ray Nucleosynthesis

abstract:
  Cross sections for production of 6He, 6Li, 7Li, and 7Be in the alpha+alpha
reaction were measured at bombarding energies of 159.3, 279.6, and 619.8 MeV,
and are found to decrease rapidly with increasing energy. These cross sections
are essential for the calculation of the rate of nucleosynthesis of the lithium
isotopes in the cosmic rays and thereby play a key role in our understanding of
the synthesis of Li, Be, and B. The results for 6Li differ significantly from
the tabulated values commonly used in cosmic-ray production calculations and
lead to lower production of 6Li.


title: Elliptic flow in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV

abstract:
  We report the elliptic flow of charged and identified particles at
mid-rapidity in Au+Au collisions at $\sqrt{s_{_{NN}}}=130$ GeV using the STAR
TPC at RHIC. The integrated elliptic flow signal, $v_2$, for charged particles
reaches values of about 0.06, indicating a higher degree of thermalization than
at lower energies. The differential elliptic flow signal, $v_2$($p_t$) up to
1.5 GeV/$c$, shows a behavior expected from hydrodynamic model calculations.
Above 1.5 GeV/$c$, the data deviate from the hydro predictions; however the
$v_2$($p_t$) is still large, suggesting finite asymmetry for the products of
hard scattering. For the identified particles, elliptic flow as a function of
$p_t$ and centrality differ significantly for particles of different masses.
This dependence can be accounted for in hydrodynamic models, indicating that
the system created shows a behavior consistent with collective hydrodynamical
flow.


title: Antinucleus Production at RHIC

abstract:
  Light antinuclei may be formed in relativistic heavy ion collisions via final
state coalescence of antinucleons. The yields of antinuclei are sensitive to
primordial antinucleon production, the volume of the system at kinetic
freeze-out, and space-momentum correlations among antinucleons at freeze-out.
We report here preliminary STAR results on antideuteron and antihelion
production in 130A GeV Au+Au collisions. These results are examined in a
coalescence framework to elucidate the space-time structure of the antinucleon
source.


title:
Electromagnetic E2 transition probabilities in 120Xe and 118Te - N=66
  nuclei

abstract:
  Lifetimes of the yrast states in 120Xe and ground state band below and above
band crossing in 118Te have been measured by DSAM in the 111Cd(12C,3n) reaction
and by DSAM and RDM in the 109Ag(13C,p3n) reaction, respectively. The results
are compared with E2 transition probabilities in 119I and 128Ba. The
experimental data are compared with calculation done in the framework of the
IBM1 model in the O(6) and SU(5) limits.


title:
Investigation of the K=8- isomers in N=74 isotones on beam of the Warsaw
  Cyclotron

abstract:
  The decay of the K=8- isomers in 132Ce and 134Nd have been investigated on
the beam of the Warsaw Cyclotron using OSIRIS array. Reactions
120Sn(16O,4n)132Ce and 118Sn(20Ne,4n)134Nd were used. Two new decay paths have
been found in the deexcitation of the 8- isomer in 132Ce. The hindrance factors
for the E1, M2 and E3 transitions deexciting the isomer have been determined.
Similar E3 decay of the 410 $\mu$s isomeric state in 134mNd has not been
observed in our experiment but nevertheless the reduced hindrance factor f_3>=9
was determined. The decay properties of the 8- isomers in the N=74 isotones are
discussed.


title: Review of Nuclear Reactions at the AGS

abstract:
  Results from p+A and A+A collisions from the beam energies 2-18 AGeV/c are
reviewed with emphasis on the properties of dense hadronic matter, and its
implications for claims that a new state of matter has been formed at the SPS.


title:
Experimental limits on the proton life-time from the neutrino
  experiments with heavy water

abstract:
  Experimental data on the number of neutrons born in the heavy water targets
of the large neutrino detectors are used to set the limit on the proton
life-time independently on decay mode through the reaction d -> n+?. The best
up-to-date limit tau_p > 4 10^23 yr with 95% C.L. is derived from the
measurements with D_2O target (mass 267 kg) installed near the Bugey reactor.
This value can be improved by six orders of magnitude with future data
accumulated with the SNO detector containing 1000 t of D_2O.


title: Laying the groundwork at the AGS: Recent results from experiment E895

abstract:
  The E895 Collaboration at the Brookhaven AGS has performed a systematic
investigation of Au+Au collisions at 2-8 AGeV, using a large-acceptance Time
Projection Chamber. In addition to extensive measurements of particle flow,
spectra, two-particle interferometry, and strangeness production, we have
performed novel hybrid analyses, including azimuthally-sensitive pion HBT,
extraction of the six-dimensional pion phasespace density, and a first
measurement of the Lambda-proton correlation function.


title: The liquid to vapor phase transition in excited nuclei

abstract:
  For many years it has been speculated that excited nuclei would undergo a
liquid to vapor phase transition. For even longer, it has been known that
clusterization in a vapor carries direct information on the liquid- vapor
equilibrium according to Fisher's droplet model. Now the thermal component of
the 8 GeV/c pion + 197Au multifragmentation data of the ISiS Collaboration is
shown to follow the scaling predicted by Fisher's model, thus providing the
strongest evidence yet of the liquid to vapor phase transition.


title: Heavy-Ion Physics at the LHC

abstract:
  This White Paper on Heavy Ion Physics at the LHC was presented at the Town
Meeting at Brookhaven National Laboratory, Jan. 21-23, 2001, and made available
to NSAC to aid in the long range planning process.


title:
Measurement of the mid-rapidity transverse energy distribution from
  $\sqrt{s_{NN}}=130$ GeV Au+Au collisions at RHIC

abstract:
  The first measurement of energy produced transverse to the beam direction at
RHIC is presented. The mid-rapidity transverse energy density per participating
nucleon rises steadily with the number of participants, closely paralleling the
rise in charged-particle density, such that E_T / N_ch remains relatively
constant as a function of centrality. The energy density calculated via
Bjorken's prescription for the 2% most central Au+Au collisions at
sqrt(s_NN)=130 GeV is at least epsilon_Bj = 4.6 GeV/fm^3 which is a factor of
1.6 larger than found at sqrt(s_NN)=17.2 GeV (Pb+Pb at CERN).


title:
Observation of $Au + Au \to Au + Au + \rho^0$ and $Au + Au \to Au^* +
  Au^* + \rho^0$ with STAR

abstract:
  We report the first observation of the reactions $Au + Au \to Au + Au +
\rho^0$ and $Au + Au \to Au^* + Au^* + \rho^0$ with the STAR detector. The
$\rho$ are produced at small perpendicular momentum, as expected if they couple
coherently to both nuclei. We discuss models of vector meson production and the
correlation with nuclear breakup, and present a fundamental test of quantum
mechanics that is possible with the system.


title:
Fragment Isotope Distributions and the Isospin Dependent Equation of
  State

abstract:
  Calculations predict a connection between the isotopic composition of
particles emitted during an energetic nucleus-nucleus collision and the density
dependence of the asymmetry term of the nuclear equation of state (EOS). This
connection is investigated for central 112Sn+112Sn and 124Sn+124Sn collisions
at E/A=50 MeV in the limit of an equilibrated freezeout condition. Comparisons
between measured isotopic yields ratios and theoretical predictions in the
equilibrium limit are used to assess the sensitivity to the density dependence
of the asymmetry term of the EOS. This analysis suggests that such comparisons
may provide an opportunity to constrain the asymmetry term of the EOS.


title:
The event generator DECAY4 for simulation of double beta processes and
  decay of radioactive nuclei

abstract:
  The computer code DECAY4 is developed to generate initial energy, time and
angular distributions of particles emitted in radioactive decays of nuclides
and nuclear (atomic) deexcitations. Data for description of nuclear and atomic
decay schemes are taken from the ENSDF and EADL database libraries. The
examples of use of the DECAY4 code in several underground experiments are
described.


title:
Strong enhancement of extremely energetic proton production in central
  heavy ion collisions at intermediate energy

abstract:
  The energetic proton emission has been investigated as a function of the
reaction centrality for the system 58Ni + 58Ni at 30A MeV. Extremely energetic
protons (EpNN > 130 MeV) were measured and their multiplicity is found to
increase almost quadratically with the number of participant nucleons thus
indicating the onset of a mechanism beyond one and two-body dynamics.


title: First Measurements of Pion Correlations by the PHENIX Experiment

abstract:
  First identical-pion correlations measured at RHIC energies by PHENIX are
presented. Two analyses with separate detectors, systematics, and statistics
provide consistent results. The resulting HBT radii are moderately larger than
those measured at lower energies. The $k_t$ dependence of the Bertsch-Pratt HBT
radii is also similar to previous measures and is consistent with the
conjecture of an expanding source.


title: Hadron freeze-out conditions in high energy nuclear collisions

abstract:
  Systematic trend of the hadron freeze-out conditions from AGS/SPS to RHIC is
discussed. The most interesting results from collisions at RHIC are that the
system is indeed approaching net-baryon free and the transverse expansion is
much stronger than that from collisions at AGS/SPS energies. In order to
understand the trend of the collective velocity, an energy scan between
$\sqrt{s_{NN}} = 20 - 200 GeV, is important. In addition, systematic studies on
the anisotropy parameter $v_2$ and the transverse momentum distributions of
$\phi, \Omega,$ and $J / \psi$ are necessary as they will help in determining
whether the collectivity is developed at the partonic stage.


title:
Mid-rapidity anti-proton to proton ratio from Au+Au collisions at $
  \sqrt{s_{NN}} = 130$ GeV

abstract:
  We report results on the ratio of mid-rapidity anti-proton to proton yields
in Au+Au collisions at $\rts = 130$ GeV per nucleon pair as measured by the
STAR experiment at RHIC. Within the rapidity and transverse momentum range of
$|y|<0.5$ and 0.4 $<p_t<$ 1.0 GeV/$c$, the ratio is essentially independent of
either transverse momentum or rapidity, with an average of $0.65\pm 0.01_{\rm
(stat.)} \pm 0.07_{\rm (syst.)}$ for minimum bias collisions. Within errors, no
strong centrality dependence is observed. The results indicate that at this
RHIC energy, although the $p$-$\pb$ pair production becomes important at
mid-rapidity, a significant excess of baryons over anti-baryons is still
present.


title: Search for the Jacobi Instability in Rapidly Rotating 46Ti* Nuclei

abstract:
  The possible existence of Jacobi shape transition in hot 46Ti at high angular
momenta was investigated with the Giant Dipole Resonance exclusive experiments.
The GDR spectra and the angular distributions are consistent with predictions
of the thermal shape fluctuation model indicating elongated nuclear shapes.


title: On the reliability of negative heat capacity measurements

abstract:
  A global protocol for the thermostatistical analysis of hot nuclear sources
is discussed. Within our method of minimization of variances we show that the
abnormal kinetic energy fluctuation signal recently reported in different
experimental data (M.D'Agostino et al.-Phys. Lett. B 473 (2000) 219, N. Le
Neindre et al.- contr. to the XXXVIII Bormio Winter Meeting on Nucl. Phys.
(2001) 404) is a genuine signal of a first order phase transition in a finite
system.


title:
Production and collective behavior of strange particles in Au + Au
  collisions at 2--8 AGeV

abstract:
  The E895 experiment at the AGS measured strange particle production and
collective behavior in Au+Au collisions between 2--8 AGeV. The production of
$\Lambda$ Baryons and K$^0$ Mesons as function of energy rises smoothly and
exhibits a nonlinear impact parameter dependence. Neutral and positively
charged Kaons exhibit a strong anti-flow behavior. $\Lambda$ Baryons show a
smaller flow signal than protons.


title: Heavy Ion Physics with CMS at LHC

abstract:
  The CMS detector is well equipped to provide unique measurements in heavy ion
collisions at LHC. It will provide measurements of the J/Psi and Upsilon
families with good separation of the different resonances. Jet quenching will
be studied by analyzing monojet-to-dijet ratios and Z0(gamma)+jet events.


title: Spectroscopy of superdeformed Pb isotopes

abstract:
  Using the spectrometer arrays GAMMASPHERE and EUROBALL a detailed
spectroscopy of superdeformed 193Pb and 196Pb has been performed. In 193Pb nine
superdeformed bands are now known and their quasiparticle assignments are
discussed. In 196Pb evidence for an octupole vibrational excitation is
presented.


title: High-spin states in and around doubly-magic nuclei

abstract:
  The study of high-spin states in regions of doubly-magic nuclei performed
with the use of deep-inelastic heavy ion reactions is reviewed. New and
tentative results concerning high-spin states in the 48Ca and yrast structures
in 47Ca, 47K, 49Ca and 49Sc isotopes are presented. The status of the high-spin
state study in the region of 132Sn and 208Pb is outlined, including discussion
of recently obtained results in the 208Pb core and the 206Hg two-proton-hole
nucleus.


title: Heat capacity and pairing transition in nuclei

abstract:
  A simple model based on the canonical-ensemble theory is outlined for hot
nuclei. The properties of the model are discussed with respect to the Fermi gas
model and the breaking of Cooper pairs. The model describes well the
experimental level density of deformed nuclei in various mass regions. The
origin of the so-called S-shape of the heat capacity curve Cv(T) is discussed.


title: Gamma-rays from Muon Capture in $^{14}$N

abstract:
  Many new $\gamma$-rays have been observed, following muon capture on
$^{14}$N. One had been reported before, and the low yield is confirmed,
indicating that the nuclear structure of $^{14}$N is still not understood.
Gamma-rays from $^{13}$C resulting from the reaction
$^{14}$N($\mu^{-}$,$\nu$n)$^{13}$C compare favourably with states observed in
the reaction $^{14}$N($\gamma$,p)$^{13}$C. More precise energies are also given
for the 7017 and 6730 keV $\gamma$-rays in $^{14}$C.


title:
A Measurement of the Electric Form Factor of the Neutron through
  $\vec{d}(\vec{e},e'n)p$ at $Q^2 = 0.5$ (GeV/c)$^2$

abstract:
  We report the first measurement of the neutron electric form factor $G_E^n$
via $\vec{d}(\vec{e},e'n)p$ using a solid polarized target. $G_E^n$ was
determined from the beam-target asymmetry in the scattering of longitudinally
polarized electrons from polarized deuterated ammonia, $^{15}$ND$_3$. The
measurement was performed in Hall C at Thomas Jefferson National Accelerator
Facility (TJNAF) in quasi free kinematics with the target polarization
perpendicular to the momentum transfer. The electrons were detected in a
magnetic spectrometer in coincidence with neutrons in a large solid angle
segmented detector. We find $G_E^n = 0.04632\pm0.00616 (stat.)
  \pm0.00341 (syst.)$ at $Q^2 = 0.495$ (GeV/c)$^2$.


title:
Spin-triplet final-state dominance in the pp -> pn pi+ reaction at 492
  MeV

abstract:
  The near-forward cross section for the pp -> pn pi^+ reaction has been
measured at 492 MeV by using the large acceptance ANKE magnetic spectrometer
placed at an internal target position of the storage ring COSY-Juelich. Protons
and pions emitted near zero degrees were detected in coincidence, and those
with theta_pi <= 2 degrees and theta_p <= 2.5degrees were subjected to detailed
analysis. Under these conditions, the excitation energy in the np system was
below 3 MeV over the measured momentum range. This is the region of the np
final-state-interaction peak, which was measured with a resolution of a
fraction of an MeV. The shape of the peak allows one to conclude that the
fraction of final spin-singlet np pairs is below about 10%. By using the
results of scattering theory, this limit is confirmed through a comparison with
the cross section for pp -> d pi^+. The smallness of the singlet contribution
is consistent with trends seen in lower energy data.


title: Elliptic Flow Measurements with the PHENIX Detector

abstract:
  Two particle azimuthal correlation functions are presented for charged
hadrons produced in Au+Au collisions at RHIC ($\sqrt{s_{_{NN}}}=130$ GeV). The
measurements allow for the determination of elliptic flow without
event-by-event estimation of the reaction plane. The measured correlation
functions indicate elliptic flow values ($v_2$) which show significant
sensitivity to both the collision centrality and the transverse momenta of
emitted hadrons.


title:
Space and Time pattern of mid-velocity IMF emission in peripheral
  heavy-ion collisions at Fermi energies

abstract:
  The emission pattern in the V_perp - V_par plane of Intermediate Mass
Fragments with Z=3-7 (IMF) has been studied in the collision 116Sn + 93Nb at
29.5 AMeV as a function of the Total Kinetic Energy Loss of the reaction. This
pattern shows that for peripheral reactions most of IMF's are emitted at
mid-velocity. Coulomb trajectory calculations demonstrate that these IMF's are
produced in the early stages of the reaction and shed light on geometrical
details of these emissions, suggesting that the IMF's originate both from the
neck and the surface of the interacting nuclei.


title:
New Insight into Antiproton Production and Reabsorption Using
  Proton-Nucleus Collisions at the AGS

abstract:
  Antiproton ($\bar{p}$) yields are presented for proton-nucleus collisions,
with targets Be, Cu, and Au, at beam momenta of 12.3 and 17.5 GeV/c. In
addition to target size and beam momentum, the number of projectile collisions
$\nu$, as derived from the number of ``grey'' tracks (slow protons and
deuterons), is used to disentangle the $\bar{p}$ reabsorption from the
production. By quantifying the amount of reabsorption of the $\bar{p}$ within
the nucleus as a function of $\nu$, the annihilation within the nucleus is
estimated and compared to the free annihilation cross section. Preliminary
results on antilambda ($\bar{\Lambda}$) production as a function of $\nu$ are
also presented for comparison.


title:
Relativistic effects and two-body currents in
  $^{2}H(\vec{e},e^{\prime}p)n$ using out-of-plane detection

abstract:
  Measurements of the ${^2}H(\vec{e},e^{\prime}p)n$ reaction were performed
using an 800-MeV polarized electron beam at the MIT-Bates Linear Accelerator
and with the out-of-plane magnetic spectrometers (OOPS). The
longitudinal-transverse, $f_{LT}$ and $f_{LT}^{\prime}$, and the
transverse-transverse, $f_{TT}$, interference responses at a missing momentum
of 210 MeV/c were simultaneously extracted in the dip region at Q$^2$=0.15
(GeV/c)$^2$. On comparison to models of deuteron electrodisintegration, the
data clearly reveal strong effects of relativity and final-state interactions,
and the importance of the two-body meson-exchange currents and isobar
configurations. We demonstrate that these effects can be disentangled and
studied by extracting the interference response functions using the novel
out-of-plane technique.


title:
Global Lifetime Measurements of Highly-Deformed and Other Rotational
  Structures in the A~135 Light Rare-Earth Region: Probing the Single-Particle
  Motion in a Rotating Potential

abstract:
  It has been possible, using GAMMASPHERE plus Microball,to extract
differential lifetime measurements free from common systematic errors for over
15 different nuclei (various isotopes of Ce, Pr, Nd, Pm, and Sm) at high spin
within a single experiment. This comprehensive study establishes the effective
single-particle quadrupole moments in the A~135 light rare-earth region.
Detailed comparisons are made with calculations using the self-consistent
cranked mean-field theory.


title: Forward K+ production in subthreshold pA collisions at 1.0 GeV

abstract:
  K+ meson production in pA (A = C, Cu, Au) collisions has been studied using
the ANKE spectrometer at an internal target position of the COSY-Juelich
accelerator. The complete momentum spectrum of kaons emitted at forward angles,
theta < 12 degrees, has been measured for a beam energy of T(p)=1.0 GeV, far
below the free NN threshold of 1.58 GeV. The spectrum does not follow a thermal
distribution at low kaon momenta and the larger momenta reflect a high degree
of collectivity in the target nucleus.


title: Simple relations among E2 matrix elements of low-lying collective states

abstract:
  A method is developed to derive simple relations among the reduced matrix
elements of the quadrupole operator between low-lying collective states. As an
example, the fourth order scalars of Q are considered. The accuracy and
validity of the proposed relations is checked for the ECQF Hamiltonian of the
IBM-1 in the whole parameter space of the Casten triangle. Furthermore these
relations are successfully tested for low-lying collective states in nuclei for
which all relevant data is available.


title:
Test of low-energy theorems for p(\vec{gamma},\pi^{0})p in the threshold
  region

abstract:
  The photon asymmetry in the reaction p(\vec{\gamma},\pi^{0})p close to
threshold has been measured for the first time with the photon spectrometer
TAPS using linearly polarized photons from the tagged-photon facility at the
Mainz Microtron MAMI. The total and differential cross sections were also
measured simultaneously with the photon asymmetry. This allowed determination
of the S-wave and all three P-wave amplitudes. The low-energy theorems based on
the parameter-free third-order calculations of heavy-baryon chiral perturbation
theory for P1 and P2 agree with the experimental values.


title:
Centrality Dependence of Charged Particle Multiplicity at Mid-Rapidity
  in Au+Au Collisions at sqrt(s_NN) = 130 GeV

abstract:
  We present a measurement of the pseudorapidity density of primary charged
particles near mid-rapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV as a
function of the number of participating nucleons. These results are compared to
models in an attempt to discriminate between competing scenarios of particle
production in heavy ion collisions.


title:
Pt Distributions of Identified Charged Hadrons Measured with the PHENIX
  Experiment at RHIC

abstract:
  Transverse momentum spectra of identified $\pi^{+}$, $\pi^{-}$, $K^{+}$,
$K^{-}$, p and $\overline{p}$ were measured by the PHENIX experiment at
mid-rapidity in Au-Au collisions at $\sqrt{s_{NN}}=130$ GeV over a broad
momentum range. Inverse slope parameters and mean $p_{t}$ were measured in
minimum bias events and as a function of the number of participating nucleons.
The mass and centrality dependence of the inverse slope parameters and mean
$p_{t}$ is presented and discussed.


title: Global Observables at RHIC

abstract:
  The first three measurements from the RHIC program were results on global
observables: charged particle multiplicity (N_ch), transverse energy (E_T) and
elliptic flow (v_2). They offer a look at the large-scale features of particle
production in high-energy nuclear collisions, with particular insight into
entropy production and collective behavior. Results from all of the RHIC
experiments are discussed in light of data from lower energy nuclear collisions
as well as from high-energy hadronic collisions to test our current
understanding of the collision dynamics.


title: Neutral Pion Distributions in PHENIX at RHIC

abstract:
  Transverse momentum spectra for identified $\pi^0$'s in the range 1 GeV/c $<
p_T <$ 4 GeV/c have been measured by the PHENIX experiment in Au-Au collisions
at $\sqrt{s}=130$ GeV. The spectra from peripheral nuclear collisions are
consistent with the simple expectation of scaling the spectra from p+p
collisions by the average number of nucleon-nucleon binary collisions. The
spectra from central collisions and the ratio of central/peripheral spectra are
significantly suppressed when compared to point-like scaling.


title:
Charged particle flow measurement for $|\eta|<5.3$ with the PHOBOS
  detector

abstract:
  The measurement of elliptic flow for charged particles in Au-Au collisions at
$\sqrt{s_{_{NN}}} = 130$ GeV using the PHOBOS detector at the Relativistic
Heavy Ion Collider (RHIC) is presented. Charge particle distributions over a
wide pseudo-rapidity region ($|\eta|<5.3$) are measured by the PHOBOS silicon
multiplicity detectors. These distributions are used to extract the final-state
azimuthal anisotropy. The centrality and pseudo-rapidity dependences of
elliptic flow, averaged over momenta on an event-by-event basis and particle
species, are discussed.


title: Is the Coulomb sum rule violated in nuclei?

abstract:
  Guided by the experimental confirmation of the validity of the Effective
Momentum Approximation (EMA) in quasi-elastic scattering off nuclei, we have
re-examined the extraction of the longitudinal and transverse response
functions in medium-weight and heavy nuclei. In the EMA we have performed a
Rosenbluth separation of the available world data on $^{40}$Ca, $^{48}$Ca,
$^{56}$Fe, $^{197}$Au, $^{208}$Pb and $^{238}$U. We find that the longitudinal
response function for these nuclei is "quenched" and that the Coulomb sum is
not saturated, at odds with claims in the literature.


title: First Results from PHENIX at RHIC

abstract:
  The first results from Au-Au collisions at $\sqrt{s_{NN}}$=130 GeV obtained
with the PHENIX detector in the Year 2000 run at RHIC are presented. The
mid-rapidity charged particle multiplicity and transverse energy per
participating nucleon rise steadily with the number of participants, such that
transverse energy per charged particle remains relatively constant as a
function of centrality. Identified charged hadron spectra as well as
$\bar{p}/p$ and $K^+/K^-$ ratios are discussed. Charged particle and neutral
pion transverse momentum distributions in peripheral nuclear collisions are
consistent with point-like scaling. The spectra at high $p_t$ from central
collisions are significantly suppressed when compared to a simple superposition
of binary nucleon-nucleon collisions.


title: COBRA - Double beta decay searches using CdTe detectors

abstract:
  A new approach (called COBRA) for investigating double beta decay using CdTe
(CdZnTe) semiconductor detectors is proposed. It follows the idea that source
and detector are identical. This will allow simultaneous measurements of 5
$\beta^-\beta^-$ - and 4 $\beta^+\beta^+$ - emitters at once. Half-life limits
for neutrinoless double beta decay of Cd-116 and Te-130 can be improved by more
than one order of magnitude with respect to current limits and sensitivities on
the effective Majorana neutrino mass of less than 1 eV can be obtained.
Furthermore, for the first time a realistic chance of observing double electron
capture processes exists. Additional searches for rare processes like the
4-fold forbidden Cd-113 $\beta$-decay, the electron capture of Te-123 and dark
matter detection can be performed. The achievable limits are evaluated for 10
kg of such detectors and can be scaled accordingly towards higher detector
masses because of the modular design of the proposed experiment.


title: First Hints of Jet Quenching at RHIC

abstract:
  At this conference first data from RHIC has been presented. Spectra of
charged hadrons and identified neutral pions obtained in central collisions
exhibit a depletion at large transverse momenta compared to expectations
deduced from $pp$ and $\bar{p}p$ data and lower energy heavy ion data. While
spectra measured in peripheral collisions exhibit the expected power-law shape,
spectra from central collisions are closer to exponential. In addition, a
significant azimuthal anisotropy of high momentum charged particle production
has been found. All observations are in qualitative agreement with theoretical
predictions that quark matter formed in heavy ion collisions quenches jet
production.


title: Study of Isoscaling with Statistical Multifragmentation Models

abstract:
  Different statistical multifragmentation models have been used to study
isoscaling, i.e. the factorization of the isotope ratios from two reactions,
into fugacity terms of proton and neutron number,
R21(N,Z)=Y2(N,Z)/Y1(N,Z)=C*exp(a*N+b*Z). Even though the primary isotope
distributions are quite different from the final distributions due to
evaporation from the excited fragments, the values of a and b are not much
affected by sequential decays. a is shown to be mainly sensitive to the proton
and neutron composition of the emitting source and may be used to study
isospin-dependent properties in nuclear collisions such as the symmetry energy
in the equation of state of asymmetric nuclear matter.


title:
On the problem of synthesis of superheavy nuclei. A short historical
  review on first theoretical predictions and new experimental reality

abstract:
  It is shown that it is just Dubna that possesses the priority both in the
recent synthesis of a superheavy nucleus with charge Z = 114 (Flerov Laboratory
of Nuclear Reactions, JINR) and in its theoretical prediction (Bogoliubov
Laboratory of Theoretical Physics, JINR) made 33 years ago. Possible sizes of
the island of stability of superheavy nuclei are discussed.


title: Collective Excitations of (154)Sm nucleus at FEL{gamma}+LHC Collider

abstract:
  The production of collective excitations of the (154)Sm at FEL{gamma}+LHC
collider is investigated. We show that this machine will be a powerful tool for
investigation of high energy level excitations.


title: Pi0 electroproduction in the Delta(1232) region at MAMI

abstract:
  The extraction of the Coulomb quadrupole to magnetic dipole ratio from a
p(e_pol,e'p_pol)pi^0 measurement is discussed. Preliminary results from further
asymmetry measurements with polarized and unpolarized electron beam indicate
that the imaginary background is well under control in the MAID2000
parameterization, but not the real (Born-) amplitudes.


title: Overview of PHENIX Results from the First RHIC Run

abstract:
  Results from the PHENIX experiment for the first RHIC run with Au-Au
collisions at a nucleon-nucleon center-of-mass energy of 130 GeV are presented.
The systematic variation with centrality of charged particle multiplicity,
transverse energy, elliptic flow, identified particle spectra and yield ratios,
and production of charged particles and neutral pions at high transverse
momenta are presented. Results on two-pion correlations and electron spectra
are also provided, along with a discussion of plans for the second run at RHIC.


title:
Response of CsI(Tl) scintillators over a large range in energy and
  atomic number of ions (Part I): recombination and delta -- electrons

abstract:
  A simple formalism describing the light response of CsI(Tl) to heavy ions,
which quantifies the luminescence and the quenching in terms of the competition
between radiative transitions following the carrier trapping at the Tl
activator sites and the electron-hole recombination, is proposed. The effect of
the delta rays on the scintillation efficiency is for the first time
quantitatively included in a fully consistent way. The light output expression
depends on four parameters determined by a procedure of global fit to
experimental data.


title:
Response of CsI(Tl) scintillators over a large range in energy and
  atomic number of ions (Part II): calibration and identification in the INDRA
  array

abstract:
  The light output of the 324 CsI(Tl) scintillators of INDRA has been measured
over a large range both in energy: 1 - 80 AMeV and in atomic number of incident
ions: Z = 1 - 60. An analytical expression for the nonlinear total light
response as a function of the energy and the identity of the ion is proposed.
It depends on four parameters. For three of them, connected to CsI(Tl)
intrinsic characteristics, recommended fixed values are proposed. They are
issued from the comparative study of the forward scintillators of INDRA, based
on intermediate mass fragment data. The fourth one, related to light collection
and to the gain of the associated photomultiplier, is particular and may be
accurately obtained afterwards, from light charged particle data. Two
applications are presented: fragment identification in telescopes using a
CsI(Tl) crystal as residual energy detector and the scintillator energy
calibration. The results are successfully confronted to heavy fragment
experimental data.


title:
Multiplicity distribution and spectra of negatively charged hadrons in
  Au+Au collisions at sqrt(s_nn) = 130 GeV

abstract:
  The minimum bias multiplicity distribution and the transverse momentum and
pseudorapidity distributions for central collisions have been measured for
negative hadrons (h-) in Au+Au interactions at sqrt(s_nn) = 130 GeV. The
multiplicity density at midrapidity for the 5% most central interactions is
dNh-/deta|_{eta = 0} = 280 +- 1(stat)+- 20(syst), an increase per participant
of 38% relative to ppbar collisions at the same energy. The mean transverse
momentum is 0.508 +- 0.012 GeV/c and is larger than in central Pb+Pb collisions
at lower energies. The scaling of the h- yield per participant is a strong
function of pt. The pseudorapidity distribution is almost constant within
|eta|<1.


title:
Observation of eta-mesic nuclei in photoreactions: results and
  perspectives

abstract:
  Recent results from the LPI experiment on searching for eta-mesic nuclei in
photoreactions are discussed and further perspectives are summarized.


title:
Charged-particle pseudorapidity density distributions from Au+Au
  collisions at sqrt(sNN)=130 GeV

abstract:
  The charged-particle pseudorapidity density dNch/deta has been measured for
Au+Au collisions at sqrt(sNN)=130 GeV at RHIC, using the PHOBOS apparatus. The
total number of charged particles produced for the 3% most central Au+Au
collisions for |eta|<=5.4 is found to be 4200+-470. The evolution of dNch/deta
with centrality is discussed, and compared to model calculations and to data
from proton-induced collisions. The data show an enhancement in
charged-particle production at mid-rapidity, while in the fragmentation
regions, the results are consistent with expectations from pp and pA
scattering.


title: Liquid-Gas Coexistence Region in Central Xe+Sn Reactions

abstract:
  Charge partitions and distributions of fragments emitted in
multifragmentation of fused systems produced in central collisions are studied
over the incident energy range 32-50 MeV per nucleon. Most of the charged
products are well identified thanks to the high performances of the INDRA 4pi
array. Supported by dynamical calculations, charge correlations are used t$
evidence, or not, spinodal instabilities and consequently the liquid-gas
coexistence region over the considered incident energy range. It was claimed in
the last few years that mass/charge distributions should follow a power law
behavior in the coexistence region. The Z distributions measured are discussed.
A first attempt is made to derive in which Z region the border between liquid
and gas parts is located.


title:
Investigation of background subtraction techniques for high mass
  dilepton physics

abstract:
  The signals in high mass dilepton spectroscopy with nucleus-nucleus
collisions at collider energies are superimposed on a generally large
combinatorial background. Because this background contains a significant
correlated like-sign component originating from B meson decays, the "like-sign"
method to determine the background is inappropriate. We discuss strategies to
deal with the correlations in the background. By taking advantage of the B
meson oscillation mechanism and of the particular features of B meson decays a
new method to measure the bbbar production cross-section is proposed.


title: Conditions for Isoscaling in Nuclear Reactions

abstract:
  Isoscaling, where ratios of isotopes emitted from two reactions exhibit an
exponential dependence on the neutron and proton number of the isotope, has
been observed over a variety of reactions including evaporation, strongly
damped binary collision, and multifragmentation. The conditions for isoscaling
to occur as well as the conditions when isoscaling fails are investigated.


title:
Investigation of the (232)Th Nucleus Excitations at the FEL {gamma} -
  Nucleus Colliders

abstract:
  The physics search potential of the FEL {gamma} - Nucleus colliders is
analysed using excitations of the (232)Th nucleus. It is shown that, due to the
monochromacity of FEL {gamma} beam and high statistics, proposed colliders will
play an important role in the field of "traditional" nuclear physics.


title:
Rapidity dependence of antiproton to proton ratios in Au+Au collisions
  at sqrt{s_{NN}}=130 GeV

abstract:
  Measurements, with the BRAHMS detector, of the antiproton to proton ratio at
central and forward rapidities are presented for Au+Au reactions at
sqrt{s_{NN}}=130 GeV, and for three different collision centralities. For
collisions in the 0-40% centrality range we find $N(\bar{{\rm p}})/N({\rm p}) =
0.64 +- 0.04 (stat.) +- 0.06 (syst.) at y ~0, 0.66 +- 0.03 +- 0.06 at y ~ 0.7,
and 0.41 +- 0.04 +- 0.06 at y ~ 2. The ratios are found to be nearly
independent of collision centrality and transverse momentum. The measurements
demonstrate that the antiproton and proton rapidity densities vary differently
with rapidity, and indicate that a net-baryon free midrapidity plateau (Bjorken
limit) is not reached at this RHIC energy.


title: Search for dibaryon production in 4Hep interactions at medium energies

abstract:
  The 4Hep interactions at 2.7 GeV/c and 5 GeV/c initial momenta of
alpha-particles are investigated using the 2m liquid hydrogen bubble chamber
(the kinetic energies of the initial protons in the nuclear rest frame were Tp
= 220 MeV and 620 MeV). The effective mass spectrum of two nucleons from the
reactions 4Hep -> dppn and 4Hep -> pppnn was analysed. The narrow structure in
the 2p mass spectrum from the quasi-elastic reaction p4He ->nF(pp)d at Tp = 620
MeV (where nF is the fast neutron in the nuclear rest frame) was found which is
the evidence of the existence of dibaryon with a mass M2p = 2008 +- 13 MeV and
a width Gamma = 20 +- 5 MeV.


title: Search for Nuclear Reactions in Water Molecules

abstract:
  A possibility for molecular-nuclear transitions to occur was recently
predicted for some few-atomic systems. Among others, the molecule of ordinary
water was shown to be a candidate for this effect due to a presence of (1-,
4.522 MeV) resonance in 18Ne nucleus. A search for traces of nuclear reactions
was carried out for condenced and vaporous phases of water, with the use of
low-background annihilation spectrometry. The measurements were performed under
conventional conditions and under conditions of the Baksan Neutrino
Observatory.


title:
Accelerated Increase in the Decay of Radioactive 125I by X Ray
  Irradiation

abstract:
  Expanded concepts of photonuclear reaction in Mossbauer type behavior were
applied to radioactive nuclei. An enhanced reduction in radioactivity of 125I
was achieved by X-Ray irradiation using the Brookhaven synchrotron.


title:
Measurement of the rate of nu_e + d --> p + p + e^- interactions
  produced by 8B solar neutrinos at the Sudbury Neutrino Observatory

abstract:
  Solar neutrinos from the decay of $^8$B have been detected at the Sudbury
Neutrino Observatory (SNO) via the charged current (CC) reaction on deuterium
and by the elastic scattering (ES) of electrons. The CC reaction is sensitive
exclusively to nu_e's, while the ES reaction also has a small sensitivity to
nu_mu's and nu_tau's. The flux of nu_e's from ^8B decay measured by the CC
reaction rate is
  \phi^CC(nu_e) = 1.75 +/- 0.07 (stat)+0.12/-0.11 (sys.) +/- 0.05(theor) x 10^6
/cm^2 s.
  Assuming no flavor transformation, the flux inferred from the ES reaction
rate is
  \phi^ES(nu_x) = 2.39+/-0.34 (stat.)+0.16}/-0.14 (sys) x 10^6 /cm^2 s.
  Comparison of \phi^CC(nu_e) to the Super-Kamiokande Collaboration's precision
value of \phi^ES(\nu_x) yields a 3.3 sigma difference, providing evidence that
there is a non-electron flavor active neutrino component in the solar flux. The
total flux of active ^8B neutrinos is thus determined to be 5.44 +/-0.99 x
10^6/cm^2 s, in close agreement with the predictions of solar models.


title: Caloric curves and critical behavior in nuclei

abstract:
  Data from a number of different experimental measurements have been used to
construct caloric curves for five different regions of nuclear mass. These
curves are qualitatively similar and exhibit plateaus at the higher excitation
energies. The limiting temperatures represented by the plateaus decrease with
increasing nuclear mass and are in very good agreement with results of recent
calculations employing either a chiral symmetry model or the Gogny interaction.
This agreement strongly favors a soft equation of state. Evidence is presented
that critical excitation energies and critical temperatures for nuclei can be
determined over a large mass range when the mass variations inherent in many
caloric curve measurements are taken into account.


title: Stopping in Relativistic Heavy Ion Reactions - From SIS to RHIC

abstract:
  The status of stopping in heavy ion reactions is reviewed by comparing
available data in pp, pA and AA systems over the energy regime sqrt(s_NN) ~ 2.5
- 130 GeV/c. The data consist of average rapidity losses, anti-proton over
proton ratios, and net-baryon values at mid-rapidity. The overall features of
nuclear stopping are reasonbly well described by simple extrapolations of pp,
and pA collisions to AA


title: HBT and Fluctuations: Recent Results

abstract:
  We give an overview of the latest results of HBT and fluctuations studies in
heavy ion collisions presented during the Quark Matter 2001 Conference.


title: Elastic scattering and breakup of 17^F at 10 MeV/nucleon

abstract:
  Angular distributions of fluorine and oxygen produced from 170 MeV 17^F
incident on 208^Pb were measured. The elastic scattering data are in good
agreement with optical model calculations using a double-folding potential and
parameters similar to those obtained from 16^O+208^Pb. A large yield of oxygen
was observed near \theta_lab=36 deg. It is reproduced fairly well by a
calculation of the (17^F,16^O) breakup, which is dominated by one-proton
stripping reactions. The discrepancy between our previous coincidence
measurement and theoretical predictions was resolved by including core
absorption in the present calculation.


title:
Status of delayed-neutron precursor data: Half-lives and neutron
  emission probabilities

abstract:
  We present in this paper a compilation of the present status of experimental
delayed-neutron precursor data; i.e. beta-decay half-lives (T_1/2) and neutron
emission probabilities (P_n) in the fission-product region (27 <= Z <= 57).
These data are compared to two model predictions of substantially different
sophistication: (i) an update of the empirical Kratz-Herrmann formula (KHF),
and (ii) a unified macroscopic-microscopic model within the quasi-particle
random-phase approximation (QRPA). Both models are also used to calculate so
far unknown T_1/2 and P_n values up to Z=63. A number of possible refinements
in the microscopic calculations are suggested to further improve the
nuclear-physics foundation of these data for reactor and astrophysical
applications.


title: High sensitivity GEM experiment on double beta decay of 76-Ge

abstract:
  The GEM project is designed for the next generation 2 beta decay experiments
with 76-Ge. One ton of ''naked'' HP Ge detectors (natural at the first GEM-I
phase and enriched in 76-Ge to 86% at the second GEM-II stage) are operating in
super-high purity liquid nitrogen contained in the Cu vacuum cryostat (sphere
with diameter 5 m). The latest is placed in the water shield. Monte Carlo
simulation evidently shows that sensitivity of the experiment (in terms of the
T1/2 limit for neutrinoless 2 beta decay) is 10^27 yr with natural HP Ge
crystals and 10^28 yr with enriched ones. These bounds corresponds to the
restrictions on the neutrino mass less than 0.05 eV and 0.015 eV with natural
and enriched detectors, respectively. Besides, the GEM-I set up could advance
the current best limits on the existence of neutralinos - as dark matter
candidates - by three order of magnitudes, and at the same time would be able
to identify unambiguously the dark matter signal by detection of its seasonal
modulation.


title:
Excitations in the Halo Nucleus He-6 Following The Li-7(gamma,p)He-6
  Reaction

abstract:
  A broad excited state was observed in 6-He with energy E_x = 5 +/- 1 MeV and
width Gamma = 3 +/- 1 MeV, following the reaction Li-7(gamma,p)He-6. The state
is consistent with a number of broad resonances predicted by recent cluster
model calculations. The well-established reaction mechanism, combined with a
simple and transparent analysis procedure confers considerable validity to this
observation.


title:
Influence of higher-order deformations in the ^{34}S + ^{168}Er fusion
  reaction

abstract:
  The shape of the measured barrier distribution for the ^{34}S + ^{168}Er
reaction is analysed using the coupled-channels description. The ^{168}Er
nucleus is a good candidate to test current fusion models description of
deformation since it has a large quadrupole deformation with an insignificant
hexadecapole deformation. Coupling to weaker channels, the 2^+_1 state in
^{34}S, the 3^-_1 state in ^{168}Er, and the pair neutron transfer channel, all
were found to have little influence on the barrier distribution. A successful
description of the barrier distribution was only obtained after the
hexacontatetrapole deformation term in ^{168}Er (beta_6) was included in the
coupling scheme. However, a positive value for beta_6 was needed where the
macroscopic-microscopic model predicts a negative one.


title:
Scintillation efficiency of nuclear recoils in a CaF-2(Eu) crystal for
  dark matter search

abstract:
  The scintillation efficiency (quenching factor) of fluorine and calcium
nuclei recoiling in a CaF-2(Eu) crystal was measured in an energy region
relevant to dark matter searches. The recoiling nuclei were obtained via the
19-F(n,n') and 40-Ca(n,n') reactions, where the neutron beam was provided via
the d(d,n)3-He reaction. The quenching factor of F and Ca nuclei in the
CaF-2(Eu) crystal was found to be 11 ~ 20 %, and 9 ~ 23 % relative to the
electron equivalent energy for 53 ~ 192 keV and 25 ~ 91 keV recoil energies,
respectively, and the energy dependence was observed. The quenching factor we
measured here is a little larger than that of previous studies, which may
depend on the Eu doping concentration of the crystal.


title: Searching for Quark Matter with Dileptons and Photons: from SPS to RHIC

abstract:
  The heavy-ion programme at the CERN SPS, which started back in '86, has
produced a wealth of very interesting and intriguing results in the quest for
the quark-gluon plasma. The highlights of the programme on dilepton and direct
photon measurements are reviewed emphasizing the most recent results obtained
in Pb-Pb collisions at 158 A GeV. Prospects from RHIC are discussed.


title:
Identified Particle Elliptic Flow in Au+Au Collisions at
  $\sqrt{s_{_{NN}}}=130$ GeV}

abstract:
  We report first results on elliptic flow of identified particles at
mid-rapidity in Au+Au collisions at $\sqrt{s_{_{NN}}}=130$ GeV using the STAR
TPC at RHIC. The elliptic flow as a function of transverse momentum and
centrality differs significantly for particles of different masses. This
dependence can be accounted for in hydrodynamic models, indicating that the
system created shows a behavior consistent with collective hydrodynamical flow.
The fit to the data with a simple model gives information on the temperature
and flow velocities at freeze-out.


title: Neutron charge form factor at large $q^2$

abstract:
  The neutron charge form factor $G_{En}(q)$ is determined from an analysis of
the deuteron quadrupole form factor $F_{C2}$ data. Recent calculations, based
on a variety of different model interactions and currents, indicate that the
contributions associated with the uncertain two-body operators of shorter range
are relatively small for $F_{C2}$, even at large momentum transfer $q$. Hence,
$G_{En}(q)$ can be extracted from $F_{C2}$ at large $q^2$ without undue
systematic uncertainties from theory.


title: Two-kaon correlations in central Pb + Pb collisions at 158 A GeV/c

abstract:
  Two-particle interferometry of positive kaons is studied in Pb + Pb
collisions at mean transverse momenta $<p_{T}>\approx 0.25$ and 0.91 GeV/c. A
three-dimensional analysis was applied to the lower $p_T$ data, while a
two-dimensional analysis was used for the higher $p_T$ data. We find that the
source size parameters are consistent with the $m_T$ scaling curve observed in
pion correlation measurements in the same collisions, and that the duration
time of kaon emission is consistent with zero within the experimental
sensitivity.


title:
Charged particle multiplicity and transverse energy in Au - Au
  collisions at $\sqrt{s_{_{NN}}}=130$ GeV

abstract:
  This paper presents the results for the charged-particle multiplicity and
transverse energy distributions at mid-rapidity in Au - Au collisions at
$\sqrt{s_{_{NN}}}=130$ GeV measured with the PHENIX detector at RHIC. The
values of $dN_{ch}/d\eta_{|\eta=0}$ and $dE_{T}/d\eta_{|\eta=0}$, analyzed as a
function of centrality, show a consistent steady rise. For the 5% most central
collisions they are $\sim70$% larger compared to the SPS results for Pb-Pb
collisions at $\sqrt{s_{_{NN}}}=17.2$ GeV. The ratio of $<E_{T}>/<N_{ch}>$
remains constant as a function of centrality at 0.8 GeV, as also observed at
the SPS at CERN and at the AGS at BNL.


title: Event Texture Search for Phase Transitions in Pb+Pb Collisions

abstract:
  NA44 uses a 512 channel Si pad array covering $1.5 <\eta < 3.3$ to study
charged hadron production in 158 A GeV Pb+Pb collisions at the CERN SPS. We
apply a multiresolution analysis, based on a Discrete Wavelet Transformation,
to probe the texture of particle distributions event-by-event, allowing
simultaneous localization of features in space and scale. Scanning a broad
range of multiplicities, we search for signals of clustering and of critical
behavior in the power spectra of local density fluctuations. The data are
compared with detailed simulations of detector responce, using heavy ion event
generators, and with a reference sample created via event mixing. An upper
limit is set on the probability and magnitude of dynamical fluctuations.


title:
Pion Interferometry of $\sqrt{s_{NN}} = 130$ GeV Au+Au Collisions at
  RHIC

abstract:
  Two-pion correlation functions in Au+Au collisions at $\sqrt{s_{NN}} = 130$
GeV have been measured by the STAR (Solenoidal Tracker at RHIC) detector. The
source size extracted by fitting the correlations grows with event multiplicity
and decreases with transverse momentum. Anomalously large sizes or emission
durations, which have been suggested as signals of quark-gluon plasma formation
and rehadronization, are not observed. The HBT parameters display a weak energy
dependence over a broad range in $\sqrt{s_{NN}}$.


title: Production of $\omega$ mesons in proton-proton collisions

abstract:
  The cross section for the production of $\omega$ mesons in proton-proton
collisions has been measured in a previously unexplored region of incident
energies. Cross sections were extracted at 92 MeV and 173 MeV excess energy,
respectively. The angular distribution of the $\omega$ at $\epsilon$=173 MeV is
strongly anisotropic, demonstrating the importance of partial waves beyond pure
s-wave production at this energy.


title:
Recent measurements with the out-of-plane spectrometer system at
  MIT-Bates

abstract:
  The recent experimental program with the out-of-plane spectrometer system
(OOPS) at MIT-Bates encompassed an extensive set of
$\mathrm{d}(\vec\mathrm{e},\mathrm{e}'\mathrm{p})$ measurements, investigations
of the $\mathrm{N}\to\Delta$ transition using
$\mathrm{p}(\vec\mathrm{e},\mathrm{e}'\mathrm{p})\pi^0$ and
$\mathrm{p}(\vec\mathrm{e},\mathrm{e}'\pi^+)\mathrm{n}$ reaction channels, and
studies of virtual Compton scattering (VCS)
$\mathrm{p}(\mathrm{e},\mathrm{e}'\mathrm{p})\gamma$ below the pion threshold.
Preliminary results are presented.


title:
Phenomenological analysis of K+ meson production in proton-nucleus
  collisions

abstract:
  Total and differential cross sections from literature, on the production of
K+ mesons in pA interactions at projectile energies between T=0.8 and 2.9 GeV,
covering the transition across the free nucleon-nucleon threshold at 1.58 GeV,
have been investigated. From the target-mass dependence of the production cross
sections no evidence for the expected change of the dominant reaction mechanism
from two-step to direct kaon production was found. At T=1.0 GeV the A
dependences of the total cross sections and of the most recent data from
COSY-Juelich, differential cross sections measured under forward angles, are
strongly different. The invariant K+ production cross sections show an overall
exponential scaling behavior with the squared four-momentum transfer between
the beam proton and the produced K+ meson for t< -0.05 GeV^2 independent of the
beam energy and emission angle. The data from COSY-Juelich reveal a strongly
different t dependence in the region of t>0 GeV^2. Further data at forward
angles and different beam energies should be taken in order to explore this
region of kinematically extreme conditions.


title: Fragment Isospin as a Probe of Heavy-Ion Collisions

abstract:
  Isotope ratios of fragments produced at mid-rapidity in peripheral and
central collisions of 114Cd ions with 92Mo and 98Mo target nuclei at E/A = 50
MeV are compared. Neutron-rich isotopes are preferentially produced in central
collisions as compared to peripheral collisions. The influence of the size (A),
density, N/Z, E*/A, and Eflow/A of the emitting source on the measured isotope
ratios was explored by comparison with a statistical model (SMM). The
mid-rapidity region associated with peripheral collisions does not appear to be
neutron-enriched relative to central collisions.


title: Antiproton Production in $p+A$ Collisions at AGS Energies

abstract:
  Inclusive and semi-inclusive measurements are presented for antiproton
($\bar{p}$) production in proton-nucleus collisions at the AGS. The inclusive
yields per event increase strongly with increasing beam energy and decrease
slightly with increasing target mass. The $\bar{p}$ yield in 17.5 GeV/c p+Au
collisions decreases with grey track multiplicity, $N_g$, for $N_g>0$,
consistent with annihilation within the target nucleus. The relationship
between $N_g$ and the number of scatterings of the proton in the nucleus is
used to estimate the $\bar{p}$ annihilation cross section in the nuclear
medium. The resulting cross section is at least a factor of five smaller than
the free $\bar{p}-p$ annihilation cross section when assuming a small or
negligible formation time. Only with a long formation time can the data be
described with the free $\bar{p}-p$ annihilation cross section.


title: Parity Violation in Proton-Proton Scattering at 221 MeV

abstract:
  The parity-violating longitudinal analyzing power, Az, has been measured in
pp elastic scattering at an incident proton energy of 221 MeV. The result
obtained is Az =(0.84 +/- 0.29 (stat.) +/- 0.17 (syst.)) x 10^{-7}. This
experiment is unique in that it selects a single parity violating transition
amplitude, 3P2-1D2, and consequently directly constrains the weak meson-nucleon
coupling constant h^pp_rho When this result is taken together with the existing
pp parity violation data, the weak meson-nucleon coupling constants h^pp_rho
and h^pp_omega can, for the first time, both be determined.


title:
Comparison of 1A GeV $^{\bf 197}$Au + C data with thermodynamics: the
  nature of phase transition in nuclear multifragmentation

abstract:
  Multifragmentation (MF) results from 1A GeV Au on C have been compared with
the Copenhagen statistical multifragmentation model (SMM). A large number of
observables, including the fragment charge yield distributions, fragment
multiplicity distributions, caloric curve, critical exponents, and the critical
scaling function are explored in this comparison. The nature of the phase
transition in SMM is studied as a function of the remnant mass and charge using
the microcanonical equation of state. For light remnants $A \leq $ 100,
backbending is observed indicating negative specific heat, while for $A \geq$
170 the effective latentheat approaches zero. Thus for heavier systems this
transition can be identified as a continuous thermal phase transition.


title: Precise Neutron Magnetic Form Factors

abstract:
  Precise data on the neutron magnetic form factor G_{mn} have been obtained
with measurements of the ratio of cross sections of D(e,e'n) and D(e,e'p) up to
momentum transfers of Q^2 = 0.9 (GeV/c)^2. Data with typical uncertainties of
1.5% are presented. These data allow for the first time to extract a precise
value of the magnetic radius of the neutron.


title:
Study of Multiparticle Azimuthal Correlations in Central CNe, MgMg, CCu
  and OPb Interactions at Energy of 3.7 GeV per Nucleon

abstract:
  Azimuthal correlations between protons and between pions have been
investigated in central CNe, MgMg, CCu and OPb collisions at energy of 3.7
GeV/nucleon. "Back-to-back" (negative) correlations have been observed for
protons in CNe, CCu and for pi^{-}-mesons in CNe and MgMg collisions. For
pi^{-}-mesons "side-by-side" (positive) azimuthal correlations have been
observed for heavy systems of CCu and OPb. The Quark Gluon String Model
satisfactorily describes the experimental results both for protons and
pi^{-}-mesons.


title:
The Thermal Phase Transition in Nuclear Multifragmentation: The Role of
  Coulomb Energy and Finite Size

abstract:
  A systematic analysis of the moments of the fragment size distribution has
been carried out for the multifragmentation (MF)of 1A GeV Au, La, and Kr on
carbon. The breakup of Au and La is consistent with a continuous thermal phase
transition. The data indicate that the excitation energy per nucleon and
isotopic temperature at the critical point decrease with increasing system
size. This trend is attributed primarily to the increasing Coulomb energy with
finite size effects playing a smaller role.


title: Nuclear Reactor Safeguards and Monitoring with Antineutrino Detectors

abstract:
  Cubic-meter-sized antineutrino detectors can be used to non-intrusively,
robustly and automatically monitor and safeguard a wide variety of nuclear
reactor types, including power reactors, research reactors, and plutonium
production reactors. Since the antineutrino spectra and relative yields of
fissioning isotopes depend on the isotopic composition of the core, changes in
composition can be observed without ever directly accessing the core itself.
Information from a modest-sized antineutrino detector, coupled with the
well-understood principles that govern the core's evolution in time, can be
used to determine whether the reactor is being operated in an illegitimate way.
A group at Sandia is currently constructing a one cubic meter antineutrino
detector at the San Onofre reactor site in California to demonstrate these
principles.


title:
Asymptotic normalization coefficient of ^{8}B from breakup reactions and
  the S_{17} astrophysical factor

abstract:
  We show that asymptotic normalization coefficients (ANC) can be extracted
from one nucleon breakup reactions of loosely bound nuclei at 30-300 MeV/u. In
particular, the breakup of ^{8}B is described in terms of an extended Glauber
model. The 8B ANC extracted for the ground state of this nucleus from breakup
data at several energies and on different targets, C^2 = 0.450+/-0.039} fm^-1,
leads to the astrophysical factor S_{17}(0)= 17.4+/-1.5 eVb for the key
reaction for solar neutrino production 7Be(p,gamma)8B. The procedure described
here is more general, providing an indirect method to determine reaction rates
of astrophysical interest with beams of loosely bound radioactive nuclei.


title: Properties of Groove Chambers

abstract:
  Groove chambers with different pitch and gap height have been tested. Gas
amplifications of the order of a few times 10$^{3}$ have been obtained.
Combining a groove structure with a GEM pre-amplification foil a gas gain of
10$^{5}$ was reached. The device is robust and can be produced at low cost in
large sizes by a laser technique.


title:
Light charged particle evaporation from hot ${31}^$P nucleus at E$^*$ ~
  60 MeV

abstract:
  The energy spectra of evaporated light charged particles (LCP) $\alpha$, p, d
and t have been measured in $7^$Li(47 MeV) + ${24}^$Mg and ${19}^$F(96 MeV)+
${12}^$C reactions. Both the systems populate the same compound nucleus
${31}^$F at excitation energy E$^*$ ~ 60 MeV. It has been observed that the
light particle spectra obtained in Li + Mg reaction follow standard statistical
model prediction, whereas a deformed configuration of the compound nucleus is
needed to explain the LCP spectra for F + C reaction, which has been attributed
to the effect of larger input angular momentum in the case of ${19}^$F(96 MeV)+
${12}^$C system.


title: On the close to threshold meson production in neutron-neutron collisions

abstract:
  A method of measuring the close to threshold meson production in
neutron-neutron collisions is described where the momenta of the colliding
neutrons can be determined with the accuracy obtainable for the proton-proton
reaction. The technique is based on the double quasi-free nn --> nn X^0
reaction, where deuterons are used as a source of neutrons


title:
Transverse mass distributions of neutral pions from $^{208}$Pb-induced
  reactions at 158$\cdot A$ GeV

abstract:
  Results on transverse mass spectra of neutral pions measured at central
rapidity are presented for impact parameter selected 158$\cdot A$ GeV Pb + Pb,
and Pb + Nb collisions. The distributions cover the range $0.5
\mathrm{GeV}/c^{2} \le m_{T} - m_{0} \le 4 \mathrm{GeV}/c^{2}$. The change of
the spectral shape with centrality is studied in detail. In going from
peripheral to medium central collisions there is a nuclear enhancement
increasing with transverse mass similar to the well known Cronin effect, while
for very central collisions this enhancement appears to be weaker than
expected.


title:
Inclusive Soft Pion Production from 12.3 and 17.5 GeV/c Protons on Be,
  Cu and Au

abstract:
  Differential cross-sections are presented for the inclusive production of
charged pions in the momentum range 0.1 to 1.2 GeV/c in interactions of 12.3
and 17.5 GeV/c protons with Be, Cu, and Au targets. The measurements were made
by Experiment 910 at the Alternating Gradient Synchrotron in Brookhaven
National Laboratory. The cross-sections are presented as a function of pion
total momentum and production polar angle $\theta$ with respect to the beam.


title: The reaction ${n} {p} \to {p} {p} \pi^{-}$ from threshold up to 570 MeV

abstract:
  The reaction ${n} {p} \to {p} {p} \pi^{-}$ has been studied in a
kinematically complete measurement with a large acceptance time-of-flight
spectrometer for incident neutron energies between threshold and 570 MeV. The
proton-proton invariant mass distributions show a strong enhancement due to the
pp($^{1}{S}_{0}$) final state interaction. A large anisotropy was found in the
pion angular distributions in contrast to the reaction ${p}{p} \to {p}{p}
\pi^{0}$. At small energies, a large forward/backward asymmetry has been
observed. From the measured integrated cross section $\sigma({n}{p} \to {\rm
p}{p} \pi^{-})$, the isoscalar cross section $\sigma_{01}$ has been extracted.
Its energy dependence indicates that mainly partial waves with Sp final states
contribute. Note: Due to a coding error, the differential cross sections ${d
\sigma}/{d M_{pp}}$ as shown in Fig. 9 are too small by a factor of two, and
inn Table 3 the differential cross sections ${d \sigma}/{d \Omega_{\pi}^{*}}$
are too large by a factor of $10/2\pi$. The integrated cross sections and all
conclusions remain unchanged. A corresponding erratum has been submitted and
accepted by European Physics Journal.


title: Energy dependence of particle multiplicities in central Au+Au collisions

abstract:
  We present the first measurement of the pseudorapidity density of primary
charged particles in Au+Au collisions at sqrt(s_NN) = 200GeV. For the 6% most
central collisions, we obtain dN_ch/deta|_|eta|<1 = 650 +/- 35 (syst). Compared
to collisions at sqrt(s_NN) = 130GeV, the highest energy studied previously, an
increase by a factor of 1.14 +/- 0.05 is found. The energy dependence of the
pseudorapidity density is discussed in comparison with data from proton-induced
collisions and theoretical predictions.


title:
Exclusive light particle measurements for the system $^{19}$F + $^{12}$C
  at 96 MeV

abstract:
  Decay sequence of hot ${31}^$P nucleus has been investigated through
exclusive light charged particle measurements in coincidence with individual
evaporation residues using the reaction ${19}^$F (96 MeV) + ${12}^$C.
Information on the sequential decay chain have been extracted by confronting
the data with the predictions of the statistical model. It is observed from the
present analysis that such exclusive light charged particle data may be used as
a powerful tool to probe the decay sequence of the hot light compound systems.


title: Acceptance Dependence of Fluctuation in Particle Multiplicity

abstract:
  The effect of limiting the acceptance in rapidity on event-by-event
multiplicity fluctuations in nucleus-nucleus collisions has been investigated.
Our analysis shows that the multiplicity fluctuations decrease when the
rapidity acceptance is decreased. We explain this trend by assuming that the
probability distribution of the particles in the smaller acceptance window
follows binomial distribution. Following a simple statistical analysis we
conclude that the event-by-event multiplicity fluctuations for full acceptance
are likely to be larger than those observed in the experiments, since the
experiments usually have detectors with limited acceptance. We discuss the
application of our model to simulated data generated using VENUS, a widely used
event generator in heavy-ion collisions. We also discuss the results from our
calculations in presence of dynamical fluctuations and possible observation of
these in the actual data.


title:
Negatively Charged Hadron Spectra in Au+Au Collisions at sqrt(s_NN) =
  130 GeV

abstract:
  Negatively charged hadron (h-) production in Au+Au collisions at BNL-RHIC is
studied with the STAR experiment. Results are presented on h- multiplicity,
pseudorapidity and transverse momentum distributions at sqrt(s_NN) = 130 GeV.


title: $\Sigma^-$ Photoproduction on the Neutron: Results from CLAS

abstract:
  As part of a broader study of kaon photoproduction on deuterium, the $\gamma
n \to K^{+} \Sigma^{-} $ channel was investigated. The data were acquired at
Jefferson Lab using the CLAS detector and the Photon-Tagging Facility installed
in Hall B.
  The photon energy range covered was from 0.50 to 2.95 GeV. For the present
analysis, the $\gamma n \to K^{+} \Sigma^{-}$ channel was identified by
detecting the positive kaon in coincidence with both decay products of the
$\Sigma^-$ hyperon, $\pi^-$ and $n$. Preliminary differential cross--sections
are shown as a function of the invariant energy W and the kaon polar angle in
the center of mass system.


title: Differential directed flow in Au+Au collisions

abstract:
  We present experimental data on directed flow in semi-central Au+Au
collisions at incident energies from 90 to 400 A MeV. For the first time for
this energy domain, the data are presented in a transverse momentum
differential way. We study the first order Fourier coefficient v1 for different
particle species and establish a gradual change of its patterns as a function
of incident energy and for different regions in rapidity.


title: Prompt dimuons and D meson production in heavy-ion collisions at the SPS

abstract:
  NA60, a follow-up of NA38/50 at the CERN-SPS, is a third generation heavy-ion
experiment finally approved in November 2000 for heavy-ion runs in 2002 and
2003. This article will report about the main motivations which lead to this
experiment, the main detector concept and the foreseen physics performance.


title: Charged particle densities from Au+Au collisions at sqrt{s_{NN}}=130 GeV

abstract:
  We present charged particle densities as a function of pseudorapidity and
collision centrality for the 197Au+197Au reaction at sqrt{s_{NN}}=130 GeV. An
integral charged particle multiplicity of 3860+/-300 is found for the 5% most
central events within the pseudorapidity range -4.7 <= eta <= 4.7. At
mid-rapidity an enhancement in the particle yields per participant nucleon pair
is observed for central events. Near to the beam rapidity, a scaling of the
particle yields consistent with the ``limiting fragmentation'' picture is
observed. Our results are compared to other recent experimental and theoretical
discussions of charged particle densities in ultra-relativistic heavy-ion
collisions.


title:
Possibility to deduce the emission time sequence of neutrons and protons
  from the neutron-proton correlation function?

abstract:
  Experimental information has been derived from the neutron-proton correlation
function in order to deduce the time sequence of neutrons and protons emitted
at 45 degrees in the E/A = 45 MeV 58Ni + 27Al reaction.


title: Ultra-peripheral collisions of relativistic heavy ions

abstract:
  We report the first observation of exclusive $\rho$ production in
ultra-peripheral collisions at RHIC. The $\rho$ are produced
electromagnetically at large impact parameters where no hadronic interactions
occur. The produced $\rho$ have a small perpendicular momentum, consistent with
production that is coherent on both the photon emitting and scattering nuclei.
We observe both exclusive $\rho$ production, and $\rho$ production accompanied
by electromagnetic dissociation of both nuclei. We discuss models of vector
meson production and the correlation with nuclear breakup. We also observe
$e^+e^-$ pair production in these ultra-peripheral collisions.


title:
Measurements and simulations of Cherenkov light in lead fluoride
  crystals

abstract:
  The anticipated use of more than one thousand lead fluoride (PbF2) crystals
as a fast and compact Cherenkov calorimeter material in a parity violation
experiment at MAMI stimulated the investigation of the light yield (L.Y.) of
these crystals. The number of photoelectrons (p.e.) per MeV deposited energy
has been determined with a hybrid photomultiplier tube (HPMT). In response to
radioactive sources a L.Y. between 1.7 and 1.9 p.e./MeV was measured with 4%
statistical and 5% systematic error. The L.Y. optimization with appropriate
wrappings and couplings was investigated by means of the HPMT. Furthermore, a
fast Monte Carlo simulation based on the GEANT code was employed to calculate
the characteristics of Cherenkov light in the PbF2 crystals. The computing time
was reduced by a factor of 50 compared to the regular photon tracking method by
implementing detection probabilities as a three-dimensional look-up table. For
a single crystal a L.Y. of 2.1 p.e./MeV was calculated. The corresponding
detector response to electrons between 10 and 1000 MeV was highly linear with a
variation smaller than 1%.


title:
Neutral pion threshold production at Q^2=0.05 GeV^2/c^2 and Chiral
  Perturbation Theory

abstract:
  New data are presented on the p(e,e'p)\pi^0 reaction at threshold at a
four-momentum transfer of Q^2=0.05 GeV^2/c^2. The data were taken with the
three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI.
The complete center of mass solid angle was covered up to a center of mass
energy of 4 MeV above threshold. Combined with measurements at three different
values of the virtual photon polarization \epsilon, the structure functions
\sigma_T, \sigma_L, \sigma_{TT}, and \sigma_{TL} are determined. The results
are compared with calculations in Heavy Baryon Chiral Perturbation Theory and
with a phenomenological model. The measured cross section is significantly
smaller than both predictions.


title:
Spin correlations in $\vec{p}\vec{p}\to pn\pi^{+}$ pion production near
  threshold

abstract:
  A first measurement of longitudinal as well as transverse spin correlation
coefficients for the reaction $\vec{p}\vec{p}\to pn\pi^+$ was made using a
polarized proton target and a polarized proton beam. We report kinematically
complete measurements for this reaction at 325, 350, 375 and 400 MeV beam
energy. The spin correlation coefficients $A_{xx}+A_{yy}, A_{xx}-A_{yy},
A_{zz}, A_{xz},$ and the analyzing power $A_{y},$ as well as angular
distributions for $\sigma(\theta_{\pi})$ and the polarization observables
$A_{ij}(\theta_{\pi})$ were extracted. Partial wave cross sections for dominant
transition channels were obtained from a partial wave analysis that included
the transitions with final state angular momenta of $l\leq 1$. The measurements
of the ${\vec{p}\vec{p}\to pn\pi^{+}}$ polarization observables are compared
with the predictions from the J\"ulich meson exchange model. The agreement is
very good at 325 MeV, but it deteriorates increasingly for the higher energies.
At all energies agreement with the model is better than for the reaction
${\vec{p}\vec{p}\to pp\pi^{0}}$.


title:
Antideuteron and antihelion production in root(s) = 130 GeV Au+Au
  collisions

abstract:
  The first measurements of light antinucleus production in Au+Au collisions at
RHIC are reported. The observed production rates for antideuterons and
antihelions are much larger than in lower energy nucleus-nucleus collisions. A
coalescence model analysis of the yields indicates that there is little or no
increase in the antinucleon freeze-out volume compared to collisions at SPS
energy. These analyses also indicate that the antihelion freeze-out volume is
smaller than the antideuteron freeze-out volume.


title: Spin Physics in the Resonance Region

abstract:
  Recent results from Jefferson Lab on measurement of inclusive double
polarization asymmetries in the nucleon resonance region are discussed.
Preliminary results on the first moment of the structure function g_1(x,Q^2)
for protons, and on the generalized Gerasimov-Drell-Hearn integral for neutrons
are presented as well. The first moment for protons shows a strong Q^2
dependence below Q^2 = 1 GeV^2, and changes sign near Q^2 = 0.3 GeV^2. Strong
double polarization asymmetries are observed in exclusive electroproduction of
pions from polarized protons.


title: Haloes and Clustering in Light, Neutron-Rich Nuclei

abstract:
  Clustering is a relatively widespread phenomena which takes on many guises
across the nuclear landscape. Selected topics concerning the study of halo
systems and clustering in light, neutron-rich nuclei are discussed here through
illustrative examples taken from the Be isotopic chain.


title: What do we learn from (e,e'p) experiments

abstract:
  The promise and limitations of studying nuclear structure and reactions using
(e,e'p) reactions are discussed. A(e,e'p)A-1 reactions on complex nuclei are
used to test new relativistic mean-field calculations and their ingredients
such as ground-state wave function, current operators, final-state interactions
and two-body currents, and to assess the limits of single-particle models. For
higher excitations of the residual nuclei, A(e,e'p) reactions reveal only
qualitative features of the reaction mechanism, and their increased usefulness
awaits input from more complex reactions such as A(e,e'X). The (e,e'p)
experiments on few-body nuclei provide essential input to quickly developing
theories for few-body systems, where individual theoretical ingredients can be
studied very selectively. A large data set is needed for this purpose, and
existing or proposed experimental programs are discussed. If hadronic theories
can meet the challenge of consistently describing this body of data at low and
moderate energies, the transition from hadronic to quark-gluon degrees of
freedom could be probed in experiments at higher energies.


title: Multiplicity Distributions and Charged-Neutral Fluctuations

abstract:
  We discuss the importance of event-by-event fluctuations in relativistic
heavy-ion collisions. We present results of multiplicity fluctuations of
photons and charged particles produced in 158$\cdot A$ GeV Pb+Pb collisions at
CERN-SPS. Multiplicity fluctuations agree with participant model calculations
indicating the absence of critical fluctuation. Localized fluctuations in
charged particles to photons have been analyzed and compared to various mixed
events. The results show localized fluctuations in both charged particles and
photons. However, no correlated DCC-like fluctuation is observed.


title:
The lifetime of the Lambda hyperon bound in hypernuclei produced by p+U
  collisions

abstract:
  The nonmesonic decay of the Lambda hyperon has been investigated by
observation of delayed fission from heavy hypernuclei produced in proton-U
collisions at Tp = 1.9 GeV. The lifetime of heavy hypernuclei with masses A
approximately 220 obtained in the present work, i.e.
  tau = 138 +- 6 (stat.) +-m 17 (syst.) ps,
  is the most accurate result for heavy hypernuclei produced in proton and
antiproton induced collisions on a U target so far.
  PACS: {13.30.-a}{Decays of baryons} {13.75.Ev}{Hyperon-nucleon interaction}
{21.80}{Hypernuclei} {25.80.Pw}{Hyperon-induced reactions}


title:
Origins of Intermediate Velocity Particle Production in Heavy Ion
  Reactions

abstract:
  Investigation of intermediate-velocity particle production is performed on
entrance channel mass asymmetric collisions of 58Ni+C and 58Ni+Au at 34.5
MeV/nucleon. Distinctions between prompt pre-equilibrium ejections, multiple
neck ruptures and an alternative phenomenon of delayed aligned asymmetric
breakup is achieved using source reconstructed correlation observables and
time-based cluster recognition in molecular dynamics simulations.


title:
Event-by-Event Fluctuations in Particle Multiplicities and Transverse
  Energy Produced in 158.A GeV Pb+Pb collisions

abstract:
  Event-by-event fluctuations in the multiplicities of charged particles and
photons, and the total transverse energy in 158$\cdot A$ GeV Pb+Pb collisions
are studied for a wide range of centralities. For narrow centrality bins the
multiplicity and transverse energy distributions are found to be near perfect
Gaussians. The effect of detector acceptance on the multiplicity fluctuations
has been studied and demonstrated to follow statistical considerations. The
centrality dependence of the charged particle multiplicity fluctuations in the
measured data has been found to agree reasonably well with those obtained from
a participant model. However for photons the multiplicity fluctuations has been
found to be lower compared to those obtained from a participant model. The
multiplicity and transverse energy fluctuations have also been compared to
those obtained from the VENUS event generator.


title:
Deformation effects in $^{56}$Ni nuclei produced in $^{28}$Si+$^{28}$Si
  at 112 MeV

abstract:
  Velocity and energy spectra of the light charged particles (protons and
$\alpha$-particles) emitted in the $^{28}$Si(E$_{lab}$ = 112 MeV) + $^{28}$Si
reaction have been measured at the Strasbourg VIVITRON Tandem facility. The
ICARE charged particle multidetector array was used to obtain exclusive spectra
of the light particles in the angular range 15 - 150 degree and to determine
the angular correlations of these particles with respect to the emission angles
of the evaporation residues. The experimental data are analysed in the
framework of the statistical model. The exclusive energy spectra of
$\alpha$-particles emitted from the $^{28}$Si + $^{28}$Si compound system are
generally well reproduced by Monte Carlo calculations using spin-dependent
level densities. This spin dependence approach suggests the onset of large
deformations at high spin. A re-analysis of previous $\alpha$-particle data
from the $^{30}$Si + $^{30}$Si compound system, using the same spin-dependent
parametrization, is also presented in the framework of a general discussion of
the occurrence of large deformation effects in the A$_{CN}$ ~ 60 mass region.


title:
Proton capture cross section of Sr isotopes and their importance for
  nucleosynthesis of proton-rich nuclides

abstract:
  The (p,$\gamma$) cross sections of three stable Sr isotopes have been
measured in the astrophysically relevant energy range. These reactions are
important for the $p$-process in stellar nucleosynthesis and, in addition, the
reaction cross sections in the mass region up to 100 are also of importance
concerning the $rp$-process associated with explosive hydrogen and helium
burning. It is speculated that this $rp$-process could be responsible for a
certain amount of $p$-nuclei in this mass region. The (p,$\gamma$) cross
sections of $^{84,86,87}$Sr isotopes were determined using an activation
technique. The measurements were carried out at the 5 MV Van de Graaff
accelerator of the ATOMKI, Debrecen. The resulting cross sections are compared
with the predictions of statistical model calculations. The predictions are in
good agreement with the experimental results for $^{84}$Sr(p,$\gamma$)$^{85}$Y
whereas the other two reactions exhibit differences that increase with mass
number. The corresponding astrophysical reaction rates have also been computed.


title: A graphite-moderated pulsed spallation ultra-cold neutron source

abstract:
  Proposals exist and efforts are under way to construct pulsed spallation
ultra-cold neutron (UCN) sources at accelerator laboratories around the world.
At the Paul Scherrer Institut (PSI), Switzerland, and at the Los Alamos
National Laboratory (LANL), U.S.A., it is planned to use solid deuterium (SD_2)
for the UCN production from cold neutrons. The philosophies about how the cold
neutrons are obtained are quite different, though. The present proposal
describes a third approach which applies a temperature optimized graphite
moderator in combination with the SD_2 and qualitatively combines advantages of
the different schemes. The scheme described here allows to build a powerful UCN
source. Assuming a pulsed 2 mA, 590 MeV proton beam with an average current of
10 microA, one obtains UCN densities in excess of 2000 cm^{-3}, UCN fluxes of
about 10^6 cm^{-2} s^{-1}, and total numbers of UCN in excess of 2*10^9 every
800 s.


title:
Suppression of Hadrons with Large Transverse Momentum in Central Au+Au
  Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV

abstract:
  Transverse momentum spectra for charged hadrons and for neutral pions in the
range 1 GeV/c $< p_T <$ 5 GeV/c have been measured by the PHENIX experiment at
RHIC in Au+Au collisions at $\sqrt{s_{_{NN}}}=130$ GeV. At high $p_T$ the
spectra from peripheral nuclear collisions are consistent with the naive
expectation of scaling the spectra from p+p collisions by the average number of
binary nucleon- nucleon collisions. The spectra from central collisions are
significantly suppressed when compared to the binary- scaled p+p expectation,
and also when compared to similarly binary-scaled peripheral collisions,
indicating a novel nuclear effect in central nuclear collisions at RHIC
energies.


title: The Nucleon Structure in the Resonance Region

abstract:
  Recent results on inclusive and exclusive electroproduction experiments at
Jefferson Lab are discussed. They include measurements of the spin responses
for protons and neutrons in and above the resonance region, exclusive single
and double pion production to measure resonance transition multipoles, and
searches for predicted yet unobserved quark model states. A brief outlook into
the new domain of generalized parton distribution is given as well.


title: Hard photon and neutral pion production in cold nuclear matter

abstract:
  The production of hard photons and neutral pions in 190 MeV proton induced
reactions on C, Ca, Ni, and W targets has been for the first time concurrently
studied. Angular distributions and energy spectra up to the kinematical limit
are discussed and the production cross-sections are presented. From the target
mass dependence of the cross-sections the propagation of pions through nuclear
matter is analyzed and the production mechanisms of hard photons and primordial
pions are derived. It is found that the production of subthreshold particles
proceeds mainly through first chance nucleon-nucleon collisions. For the most
energetic particles the mass scaling evidences the effect of multiple
collisions.


title:
Multiplicity and mean transverse momentum fluctuations in Au + Au
  collisions at RHIC

abstract:
  Strong modification of event-by-event fluctuations in global observables was
proposed by several authors as an indicator of the phase transition in system
evolution. We report the results of the analysis of STAR TPC data on the
charged multiplicity and mean transverse momentum fluctuations in Au+Au
collisions at $\sqrt{s_{NN}}$=130 GeV. We discuss the centrality dependence of
the observed fluctuations and compare the results with available data from
lower collision energies and ISR data.


title: $\pi \to \pi\pi$ results in nuclei

abstract:
  The Crystal Ball ($CB$) collaboration at $BNL$ has recently presented results
regarding a study of the $\pi^- A \to \pi^0\pi^0 A^\prime$ reaction on $H, D,
C, Al$ and $Cu$, using a nearly 4$\pi$ detector. Similar results, but for the
$\pi^+ A \to \pi^+\pi^{\pm} A^\prime$ reaction on $^{2}H$, $^{12}C$, $^{40}Ca$,
and $^{208}Pb$, have been published earlier by the $CHAOS$ collaboration at
$TRIUMF$. In this Brief Report a comparison of the results of the two
measurements is made, which shows that the $CHAOS$ and $CB$ data share relevant
common features. In particular, the increase in strength as a function of A
seen in the near-threshold $\pi^+ \pi^-$ invariant mass spectra reported by the
$CHAOS$ group, is also seen in the $\pi^0 \pi^0$ CB data, when the results from
the two groups are compared in a way which accounts for the different
acceptances of the two experiments.


title: Ultra-Peripheral Collisons in CMS

abstract:
  Coherent peripheral collisions of atomic nuclei involve electromagnetic or
long range hadronic interactions at impact parameters, where both nuclei
survive intact. Recently such ultra-peripheral collisions were observed at
RHIC. The effect of the electromagnetic field can be interpreted as a
photon-photon collision with an effective center of mass energy up to a few GeV
at RHIC. At the Large Hadron Collider the effective center of mass energy will
be increased by more than an order of magnitude. This opens new opportunities,
ranging from the study of non-perturbative QCD to the search for new physics.