title:
Enhanced Production of Low-Mass Electron Pairs in 40 AGeV Pb-Au
  Collisions at the CERN SPS

abstract:
  We report on first measurements of low-mass electron pairs in Pb-Au
collisions at the lower SPS beam energy of 40 AGeV. The pair yield integrated
over the range of invariant masses 0.2<m<1 GeV/c^2 is enhanced by a factor of
5.1+-1.3(stat)+-1.0/1.5(syst data/decays) over the expectation from neutral
meson decays, more than previously observed at the higher energy of 158 AGeV.
The results are discussed with reference to model calculations based on pi+ pi-
-> e+ e- annihilation with a modified rho-propagator. They may be linked to
chiral symmetry restoration and support the notion that the in-medium
modifications of the rho are more driven by baryon density than by temperature.


title:
Charge Particle Multiplicity and Transverse Energy Measurements in Au-Au
  collisions in PHENIX at RHIC

abstract:
  We present results on charged particle and transverse energy densities
measured at mid-rapidity in Au-Au collisions at sqrt(s_{NN})=200 GeV. The mean
transverse energy per charged particle is derived. The results are presented as
a function of centrality, which is defined by the number of participating
nucleons, and compared to results obtained in Au-Au collisions at
sqrt{s_{NN})=130 GeV. A comparison with calculations from various theoretical
models is performed.


title:
Two-particle correlations measured by PHENIX in Au-Au collisions at
  sqrt(s_NN)=200 GeV

abstract:
  In 2001, PHENIX measured particle correlations of identical charged pions and
kaons at mid-rapidity in Au-Au collisions at sqrt(s_NN)=200GeV. Bertsch-Pratt
radius parameters of pion pairs are studied for 9 kT regions from 0.2 to 2.0
GeV/c and for 9 selections of collision centralities. The pion radius
parameters are consistent with the result at sqrt(s_NN)=130GeV, and the ratio
Rout/Rside is below 1 in all <kT> ranges up to 1.2 GeV/c. The radius parameters
from charged kaon correlations are compared with those of pions.


title: Results on Identified Hadrons from the PHENIX Experiment at RHIC

abstract:
  Recent results on identified hadrons from the PHENIX experiment in Au+Au
collisions at mid-rapidity at $\sqrt{s_{NN}}$ = 200 GeV are presented. The
centrality dependence of transverse momentum distributions and particle ratios
for identified charged hadrons are studied. The transverse flow velocity and
freeze-out temperature are extracted from $p_{T}$ spectra within the framework
of a hydrodynamic collective flow model. Two-particle HBT correlations for
charged pions are measured in different centrality selections for a broad range
of transverse momentum of the pair. Results on elliptic flow measurements with
respect to the reaction plane for identified particles are also presented.


title:
$\phi$ meson production in Au - Au collisions at $\sqrt{s_{NN}}$ = 200
  GeV

abstract:
  A simultaneous measurement of the $\phi$ meson via its $K^{+} K^{-} $ and
$e^{+} e^{-}$ decay channels was performed in Au + Au collisions at
$\sqrt{s_{NN}}$ = 200 GeV at mid-rapidity by the PHENIX experiment. The
preliminary minimum bias yields $dN_{\phi}/dy$ in the kaon and electron
channels are $2.01 \pm 0.22 (stat.) ^{+1.01}_{-0.52} (syst.)$ and $5.4 \pm 2.5
(stat) ^{+3.4}_{-2.8} (syst.)$, respectively. The centrality dependence of the
yield in the $K^{+} K^{-} $ channel is presented.


title: Charged Hadron Spectra in PHENIX

abstract:
  PHENIX has measured transverse momentum spectra of charged particles at
mid-rapidity up to 10 GeV/c in Au+Au collisions at sqrt{s}=200 GeV. For central
collisions, the yield at high pT is significantly suppressed comparing to
binary scaled p+p data, and this suppression is stronger than observed at 130
GeV. Above 4 GeV/c, the deficit of high momentum particles is almost
independent of pT.


title: High p_T identified hadron ratios in sqrt(s_NN)=200GeV Au+Au Collisions

abstract:
  The PHENIX detector at RHIC measured high p_T identified hadron ratios in
sqrt(s_NN) = 200GeV Au+Au collisions. Within the current systematic and
statistical errors, pbar/p ratios that are measured up to 3.8GeV/c are almost
independent of both p_T and centrality. The baryon to meson ratio is measured
through p/pi and pbar/pi ratios up to 3.8GeV/c, showing they are strongly
centrality dependent.


title:
Source Parameters from Identified Hadron Spectra and HBT Radii for Au-Au
  Collisions at sqrt(s_NN)=200 GeV in PHENIX

abstract:
  The characteristics of the particle emitting source are deduced from low
transverse momentum identified hadron spectra (transverse mass less than 1 GeV)
and HBT radii using a hydrodynamic interpretation. From the most peripheral to
the most central data, the single particle spectra are fit simultaneously for
all pions, kaons, and (anti-)protons using the parameterization in [1] and
assuming a linear transverse flow profile. Within the systematic uncertainties,
the expansion parameters called the freeze-out temperature and flow velocity,
respectively decrease and increase with the number of participants, saturating
for both at mid-centrality. The expansion using analytic calculations of the kT
dependence of HBT radii in [2] is fit to the data but no chi-squared minimum is
found.


title:
One-, Two- and Three-Particle Distributions from 158 A GeV/c Central
  Pb+Pb Collisions

abstract:
  Several hadronic observables have been studied in central 158 A GeV Pb+Pb
collisions using data measured by the WA98 experiment at CERN: single negative
pion and kaon production, as well as two- and three-pion interferometry. The
Wiedemann-Heinz hydrodynamical model has been fitted to the pion spectrum,
giving an estimate of the temperature and transverse flow velocity.
Bose-Einstein correlations between two identified negative pions have been
analysed as a function of kT, using two different parameterizations. The
results indicate that the source does not have a strictly boost invariant
expansion or spend time in a long-lived intermediate phase. A comparison
between data and a hydrodynamical based simulation shows very good agreement
for the radii parameters as a function of kT. The pion phase-space density at
freeze-out has been measured and agrees well with the Tomasik-Heinz model. A
large pion chemical potential close to the condensation limit of the pion mass
seems to be excluded. The three-pion Bose-Einstein interferometry shows a
substantial contribution of the genuine three-pion correlation, but not quite
as large as expected for a fully chaotic and symmetric source.


title: Exclusive measurements of quasi-free eta-photoproduction from deuterium

abstract:
  Quasi-free photoproduction of eta-mesons from the deuteron has been measured
at the tagged photon facility of the Mainz microtron MAMI with the photon
spectrometer TAPS for incident photon energies from the production threshold at
630 MeV up to 820 MeV. In a fully exclusive measurement eta-mesons and recoil
nucleons were detected in coincidence. At incident photon energies above the
production threshold on the free nucleon, where final state interaction effects
are negligible, an almost constant ratio of sigma(n)/sigma(p)=0.66+/-0.10 was
found. At lower incident photon energies the ratio rises due to re-scattering
effects. The average ratio agrees with the value extracted from a comparison of
the inclusive d(gamma,eta)X cross section to the free proton cross section via
a participant - spectator model for the deuteron cross section
(sigma(n)/sigma(p)=0.67+/-0.07). The angular dependence of the ratio agrees
with the expected small deviation of neutron and proton cross section from
isotropy due to the influence of the D13(1520) resonance. The energy dependence
of the ratio in the excitation energy range of the S11(1535) resonance
disfavors model predictions which try to explain this resonance as K-Sigma
bound state.


title:
Isotope yields from central 112,124Sn+112,124Sn collisions, dynamical
  emission?

abstract:
  Isotopic yields for light particles and intermediate mass fragments have been
measured for 112Sn+112Sn, 112Sn+124Sn, 124Sn+112Sn and 124Sn+124Sn central
collisions at E/A=50 MeV and compared with predictions of stochastic mean field
calculations. These calculations predict a sensitivity of the isotopic
distributions to the density dependence of the asymmetry term of the nuclear
equation of state. However, the secondary decay of the excited fragments
modifies significantly the primary isotopic distributions and these
modifications are rather sensitive to theoretical uncertainties in the
excitation energies of the hot fragments. The predicted final isotope
distributions are narrower than the experimental data and the sensitivity of
the predicted yields to the density dependence of the asymmetry term is
reduced.


title:
Measurement of the neutral pion cross section in proton-proton
  collisions at sqrt{s}=200GeV with PHENIX

abstract:
  The inclusive cross section for neutral pion production in the range
1<p_T<13GeV/c in |eta|<0.35 has been measured by the PHENIX experiment in
proton-proton collisions at sqrt{s}=200GeV. An NLO pQCD calculation is, within
the experimental and theoretical uncertainties, consistent with the
measurement.


title: Decay Properties of the Roper Resonance from p p -> p p pi+ pi-

abstract:
  Exclusive measurements of the two-pion production channel p p -> p p pi+ pi-
have been carried out near threshold at CELSIUS with the PROMICE/WASA detector.
They reveal p p -> p p*(1440) -> p p sigma -> p p (pi+ pi-)I=l=0 as the
dominant process at these energies, however, the data exhibit also significant
contributions from p*(1440) -> Delta pi -> p (pi+ pi-)I=l=0 . From the observed
interference of this routes their relative branching ratio is derived.


title: Two Particle Azimuthal Correlation Measurements in PHENIX

abstract:
  Two particle azimuthal correlation functions are presented for charged
hadrons produced in Au-Au collisions at RHIC sqrt(s_NN)=200 GeV.The correlation
functions indicate sizeable asymmetries and anisotropies. The trend of the
asymmetries is compatible with the presence of emission patterns associated
with mini-jets. The magnitude and the trend of the differential anisotropies
v_2(p_T) and v_2(N_Part), provide important model constraints.


title: Parity Violation in pp and np Experiments

abstract:
  Parity violation experiments involving only two nucleons provide a way to
study the non-leptonic, strangeness conserving part of the weak interaction in
a clean measurement free of nuclear structure uncertainties. Although simple in
principle, the experiments are technically very demanding and great pains must
be taken both in the preparation of the incident polarized beams and the
measurement of the resultant parity violating asymmetries, which may be masked
by a multitude of systematic effects. At low and intermediate energies, pp
experiments are sensitive to the medium range part of the parity violating
nucleon-nucleon force, usually parameterized in terms of rho and omega meson
exchange. I review existing pp measurements with particular emphasis on the
recent 221 MeV pp measurement at TRIUMF which permitted the weak meson-nucleon
coupling constants h^{pp}_rho and h^{pp}_omega to be determined separately for
the first time. The np experiments, on the other hand, are used to extract the
weak pion nucleon coupling, f_pi, describing the longest range part of the
parity violating nucleon-nucleon force. The np system is the only two nucleon
system that is sensitive to f_pi. I also review these experiments, with
specific details of the np -> d gamma experiment now under preparation at Los
Alamos National Laboratory.


title: Relativistic Heavy Ion Physics: Results from AGS to RHIC

abstract:
  High-energy collisions of heavy ions provide a means to study QCD in a regime
of high parton density, and may provide insight into its phase structure.
Results from the four experiments at RHIC (BRAHMS, PHENIX, PHOBOS and STAR) are
presented, and placed in context with the lower energy data from the AGS and
SPS accelerators. The focus is on the insights these measurements provide into
the time history of the collision process. Taken together, the data point to
the creation of a deconfined state of matter that forms quickly, expands
rapidly and freezes out suddenly.


title:
Similarity of fragment characteristics at mid-velocity for
  mid-peripheral and central collisions

abstract:
  The characteristics, in particular the isotopic composition (N/Z), of
intermediate mass fragments (IMF : 3<=Z<=20) produced near the center-of-mass
in mid-peripheral and central collisions of 114Cd ions with 92Mo target nuclei
at E/A=50 MeV are compared to that of IMFs emitted from the projectile-like
fragment (PLF) in mid-peripheral collisions. IMFs produced at mid-velocities
are on average larger in atomic number, more energetic, and more neutron-rich
as compared to IMFs emitted from the PLF. In contrast, the characteristics of
mid-velocity IMFs in central collisions and mid-peripheral collisions are
comparable.


title:
Possible Evidence of Time Variation of Weak Interaction Constant from
  Double Beta Decay Experiments

abstract:
  A comparison is made of the probability of the process of two neutrino double
beta decay for $^{82}$Se in direct (counter) and geochemical experiments. It is
shown that the probability is systematically lower in geochemical experiments,
which characterize the probability of $\beta\beta(2\nu)$ decay a few billions
years ago. The experimental data for $^{130}$Te are also analyzed. It is shown
that geochemical measurements on young minerals give lower values of $T_{1/2}$
($^{130}$Te) and $T_{1/2}$ ($^{82}$Se) as compared to measurements on old
minerals. It is proposed that this could be due to a change in the weak
interaction constant with time. Possibilities of new, precise measurements be
performed with the aid of counters and geochemical experiments are discussed.


title: Identified charged particle azimuthal anisotropy in PHENIX at RHIC

abstract:
  We present here v$_2$ of identified and inclusive charged particles measured
in the PHENIX central arm detector ($|\eta| < 0.35$) with respect to the
reaction plane defined at $|\eta| = 3 \sim 4$ in 200 GeV Au+Au collisions. We
find that v$_2$ increases from central to mid-central collisions reaching a
maximum at about 50% of the geometric cross section and then decreases again
for more peripheral collisions. As a function of transverse momentum in
minimum-bias collisions, the v$_2$ parameter increases linearly with p$_{\rm
T}$ up to p$_{\rm T}$ $\simeq$ 2 GeV/c and then saturates for inclusive charged
particles. The v$_2$ parameter of identified particles ($\pi^+$, $\pi^-$,
$K^+$, $K^-$, $p$ and $\bar{p}$) follow a hydro-dynamic behavior up to 2 GeV/c
in p$_{\rm T}$, where the lighter mass particles have larger v$_2$ at a given
p$_{\rm T}$. However there is an indication that this trend is reversed at
around p$_{\rm T}$ $\simeq$ 2 GeV/c, where $p$ and $\bar{p}$ have larger v$_2$
than $\pi$ and $K$.


title:
J/Psi -> ee and J/Psi -> \mu\mu Measurements in AuAu and pp Collisions
  at sqrt{s_{NN}} = 200 GeV

abstract:
  First results are presented from J/Psi -> ee and J/Psi -> \mu\mu measurements
by the PHENIX experiment at RHIC. These results are from a preliminary analysis
of dielectrons from AuAu and pp data and dimuons from pp data measured in the
RHIC run 2. A total cross section for J/Psi production in sqrt{s} = 200 GeV pp
collisions of 3.8 \pm 0.6 (stat) \pm 1.3 (sys) microbarns is found. The J/Psi
-> ee yield is presented versus number of binary collisions.


title: Anisotropic flow

abstract:
  Recent experimental results on directed and elliptic flow, theoretical
developments, and new techniques for anisotropic flow analysis are reviewed.


title:
The significance of the fragmentation region in ultrarelativistic heavy
  ion collisions

abstract:
  We present measurements of the pseudorapidity distribution of primary charged
particles produced in Au+Au collisions at three energies, sqrt(s_{NN}) = 19.6,
130, and 200 GeV, for a range of collision centralities. The centrality
dependence is shown to be non-trivial: the distribution narrows for more
central collisions and excess particles are produced at high pseudorapidity in
peripheral collisions. For a given centrality, however, the distributions are
found to scale with energy according to the "limiting fragmentation"
hypothesis. The universal fragmentation region described by this scaling grows
in pseudorapidity with increasing collision energy, extending well away from
the beam rapidity and covering more than half of the pseudorapidity range over
which particles are produced. This approach to a universal limiting curve
appears to be a dominant feature of the pseudorapidity distribution and
therefore of the total particle production in these collisions.


title:
Analysing power A_y in the reaction p(pol) p --> p p eta close to
  threshold

abstract:
  Measurements of the eta meson production with a polarised proton beam in the
reaction p(pol) p --> p p eta have been carried out at an excess energy of Q =
40 MeV. The dependence of the analysing power A_y on the polar angle theta^*_q
of the eta meson in the center of mass system (CMS) has been studied. The data
indicate the possibility of an influence of p- and d-waves to the close to
threshold eta production.


title:
Proton--induced deuteron breakup at GeV energies with forward emission
  of a fast proton pair

abstract:
  A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission
of a fast proton pair with small excitation energy $E_{pp}<$ 3 MeV has been
performed at the ANKE spectrometer at COSY--J\"ulich. An exclusive measurement
was carried out at six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35,
and 1.9 GeV by reconstructing the momenta of the two protons. The differential
cross section of the breakup reaction, averaged up to $8^{\circ}$ over the cm
polar angle of the total momentum of the $pp$ pairs, has been obtained. Since
the kinematics of this process is quite similar to that of backward elastic $pd
\to dp$ scattering, the results are compared to calculations based on a
theoretical model previously applied to the $pd \to dp$ process.


title:
Bose-Einstein Correlations of Charged Kaons in Central Pb+Pb Collisions
  at $E_{beam} = 158 AGeV$

abstract:
  Bose-Einstein correlations of charged kaons were measured near mid-rapidity
in central Pb+Pb collisions at 158 A$\cdot$GeV by the NA49 experiment at the
CERN SPS. Source radii were extracted using the Yano-Koonin-Podgoretsky and
Bertsch-Pratt parameterizations. The results are compared to published pion
data. The measured $m_\perp$ dependence for kaons and pions is consistent with
collective transverse expansion of the source and a freeze-out time of about
9.5 $fm$.


title: Eta physics at threshold

abstract:
  The production of eta and eta-prime mesons in elementary nucleon-nucleon
collisions has been investigated at the synchrotrons CELSIUS, COSY and SATURNE.
The magnitude and energy dependence of the total cross section as well as the
occupation distribution of the phase space serve as observables for
investigating the mechanisms underlying the production processes and the
interaction of mesons with nucleons. The precise data on the eta and eta-prime
creation via the pp --> pp eta(eta-prime) reactions allowed to settle the
general features of the eta and eta-prime meson production and revealed the
sensitivity of the mentioned observables to the nucleon-nucleon-meson final
state interaction. The particular production properties, like for example the
determination of the dominating exchange processes which lead to the excitation
of the S_11 nucleon isobar in the case of eta creation, must be established by
confrontation with other observables. The present status of this investigation
with an emphasis on the results of the COSY-11 collaboration is briefly
presented. The available data are interpreted in view of the production
mechanism and the meson-nucleon interaction.


title: Quasi-free Compton Scattering and the Polarizabilities of the Neutron

abstract:
  Differential cross sections for quasi-free Compton scattering from the proton
and neutron bound in the deuteron have been measured using the Glasgow/Mainz
tagging spectrometer at the Mainz MAMI accelerator together with the Mainz 48
cm $\oslash$ $\times$ 64 cm NaI(Tl) photon detector and the G\"ottingen SENECA
recoil detector. The data cover photon energies ranging from 200 MeV to 400 MeV
at $\theta^{LAB}_\gamma=136.2^\circ$. Liquid deuterium and hydrogen targets
allowed direct comparison of free and quasi-free scattering from the proton.
The neutron detection efficiency of the SENECA detector was measured via the
reaction $p(\gamma,\pi^+ n)$. The "free" proton Compton scattering cross
sections extracted from the bound proton data are in reasonable agreement with
those for the free proton which gives confidence in the method to extract the
differential cross section for free scattering from quasi-free data.
Differential cross sections on the free neutron have been extracted and the
difference of the electromagnetic polarizabilities of the neutron have been
obtained to be $\alpha-\beta= 9.8\pm 3.6(stat){}^{2.1}_1.1(syst)\pm 2.2(model)$
in units $10^{-4}fm^3$. In combination with the polarizability sum $\alpha
+\beta=15.2\pm 0.5$ deduced from photoabsorption data, the neutron electric and
magnetic polarizabilities, $\alpha_n=12.5\pm 1.8(stat){}^{+1.1}_{-0.6}\pm
1.1(model)$ and $\beta_n=2.7\mp 1.8(stat){}^{+0.6}_{-1.1}(syst)\mp 1.1(model)$
are obtained. The backward spin polarizability of the neutron was determined to
be $\gamma^{(n)}_\pi=(58.6\pm 4.0)\times 10^{-4}fm^4$.


title: High $p_T$ Measurements from PHENIX

abstract:
  We present recent high transverse momentum measurements by the PHENIX
experiment for Au+Au and p+p collisions at $\sqrt{s_{NN}} = 200$ GeV at the
Relativistic Heavy Ion Collider (RHIC). We show particle spectra for neutral
pions and charged hadrons, define and show the nuclear modification factor, and
discuss particle composition. By means of the nuclear modification factor, we
observe a suppression factor of 5-6 for neutral pions and 3-4 for charged
hadrons in central collisions at high $p_T$. We find that the ratio of $\pi^0$
to $(h^++h^-)/2$ remains nearly constant at $\sim 0.5$ for $p_T = 2-9$ GeV/c.
Finally we present strong evidence for the observation of jets in Au+Au
collisions.


title:
Free Muons and Muonium - Some Achievements and Possibilities in Low
  Energy Muon Physics

abstract:
  Some recent precision experiments in low energy muon physics are discussed.
Spectroscopy on the muonium atom, the bound state of a positve muon and an
electron, has provided precise tests of standard theory and yielded most
precise values of important fundamental constants. A search for spontaneous
muonium to antimuonium conversion test lepton flavour conservation and yields
most stringent limits on parameters in several speculative models. The muon
magnetic anomaly may contain hints to new physics and is a relevant calibration
point for numerous models beyond standard theory. Since most precision
experiments are limited by the particle fluxes at present muon sources,
possibilities in this field are shown which will emerge at upgraded present
facilities or new accelerator complexes under construction or planning. At such
places novel techniques would be enabled.


title:
TRI$\mu$P - A New Facility to Investigate Fundamental Interactions with
  Optically Trapped Radioactive Atoms

abstract:
  At the Kernfysisch Versneller Instituut (KVI) in Groningen, NL, a new
facility (TRI$\mu$P) is under development. It aims for producing, slowing down
and trapping of radioactive isotopes in order to perform accurate measurements
on fundamental symmetries and interactions. A spectrum of radioactive nuclids
will be produced in direct, inverse kinematics of fragmentation reactions using
heavy ion beams from the superconducting AGOR cyclotron. The research programme
pursued by the KVI group includes precision studies of nuclear $\beta$-decays
through $\beta$--neutrino (recoil nucleus) momentum correlations in weak decays
and searches for permanent electric dipole moments in heavy atomic systems.
This offers a large potential for discovering new physics or to limit
parameters in models beyond standard theory significantly. The scientific
approach chosen in TRI$\mu$P can be regarded as complementary to such high
energy physics. The facility in Groningen will be open for use by the worldwide
community of scientists.


title:
Universal Behavior of Charged Particle Production in Heavy Ion
  Collisions at RHIC Energies

abstract:
  The PHOBOS experiment at RHIC has measured the multiplicity of primary
charged particles as a function of centrality and pseudorapidity in Au+Au
collisions at sqrt(s_NN) = 19.6, 130 and 200 GeV. Two kinds of universal
behavior are observed in charged particle production in heavy ion collisions.
The first is that forward particle production, over a range of energies,
follows a universal limiting curve with a non-trivial centrality dependence.
The second arises from comparisons with pp/pbar-p and e+e- data.
N_tot/(N_part/2) in nuclear collisions at high energy scales with sqrt(s) in a
similar way as N_tot in e+e- collisions and has a very weak centrality
dependence. This feature may be related to a reduction in the leading particle
effect due to the multiple collisions suffered per participant in heavy ion
collisions.


title:
Electromagnetic-induced fission of 238U projectile fragments, a test
  case for the production of spherical super-heavy nuclei

abstract:
  Isotopic series of 58 neutron-deficient secondary projectiles (205,206At,
205-209Rn, 208-212,217,218Fr, 211-223Ra, 215-226Ac, 221-229Th, 226-231Pa,
231-234U) were produced by projectile fragmentation using a 1 A GeV 238U beam.
Cross sections of fission induced by nuclear and electromagnetic interactions
in a secondary lead target were measured. They were found to vary smoothly as a
function of proton and neutron number of the fissioning system, also for nuclei
with large ground-state shell effects near the 126-neutron shell. No
stabilization against fission was observed for these nuclei at low excitation
energies. Consequences for the expectations on the production cross sections of
super-heavy nuclei are discussed.


title:
High $p_{T}$ Inclusive Charged Hadron Spectra from Au+Au Collisions at
  $\sqrt{s_{NN}}$ = 200 GeV

abstract:
  The STAR Collaboration presents new measurements of inclusive charged hadron
distributions for $p_{T} <$ 12 GeV/c from Au+Au collisions at $\sqrt{s_{NN}}$ =
200 GeV. Charged hadron suppression at high $p_{T}$ is similar in shape and
magnitude at all centralities to that observed previously at $\sqrt{s_{NN}}$ =
130 GeV for $p_{T} <$ 6 GeV/c. The ratio of spectra from central and peripheral
Au+Au collisions shows that hadron suppression is approximately constant within
6 $< p_{T} <$ 12 GeV/c. The ratios of charged hadron spectra at the two beam
energies show a 15-20% increase in yield at low $p_{T}$. At high $p_{T}$, the
ratios show a larger increase that agrees well with pQCD calculations of the
$\sqrt{s_{NN}}$ dependence of particle production in Au+Au collisions.


title:
Azimuthal Anisotropy of Charged and Identified High $p_T$ Hadrons in
  Au+Au Collisions at RHIC

abstract:
  We report new results on $v_2(p_T)$ for Au+Au collisions at
$\sqrt{s_{NN}}$=200 GeV for charged hadrons, pions, kaons, (anti)protons,
$K^0_s$, and $\Lambda$. The analysis is extended to $p_T=12$ GeV/c for charged
hadrons and $p_T=4$ GeV/c for identified particles. A comparison of the
azimuthal anisotropy of charged hadrons measured at \sqrtsNN=130 and 200 GeV is
presented. The $p_T$-dependence of baryon versus meson elliptic flow is
discussed.


title:
Coherent Vector Meson Production in Ultra-Peripheral Heavy-Ion
  Collisions at STAR

abstract:
  We report the first observation of coherent rho0 production (AuAu->AuAu rho0)
and rho0 production accompanied by mutual nuclear Coulomb excitation
(AuAu->Au*Au*rho0),and the observation of coherent e+e- pair production
(AuAu->Au*Au*e+e-) in ultra-peripheral relativistic heavy-ion collisions
(UPCs). We give transverse momentum, mass, and rapidity distributions. The
cross sections for coherent rho0 production at sqrt{s_NN}=130 and 200 GeV are
in agreement with theoretical predictions, which treat rho^0 production and
nuclear excitation as independent processes.


title:
Characteristics of the fragments produced in central collisions of
  129Xe+ natSn from 32 to 50 AMeV

abstract:
  Characteristics of the primary fragments produced in central collisions of
129Xe + natSn from 32 to 50 AMeV have been obtained. By using the correlation
technique for the relative velocity between light charged particles (LCP) and
fragments, we were able to extract the multiplicities and average kinetic
energy of secondary evaporated LCP. We then reconstructed the size and
excitation energy of the primary fragments. For each bombarding energy a
constant value of the excitation energy per nucleon over the whole range of
fragment charge has been found. This value saturates at 3 AMeV for beam
energies 39 AMeV and above. The corresponding secondary evaporated LCP
represent less than 40% of all produced particles and decreases down to 23% for
50 AMeV. The experimental characteristics of the primary fragments are compared
to the predictions of statistical multifragmentation model (SMM) calculations.
Reasonable agreement between the data and the calculation has been found for
any given incident energy. However SMM fails to reproduce the trend of the
excitation function of the primary fragment excitation energy and the amount of
secondary evaporated LCP's.


title:
Heavy Residues with A<90 in the Asymmetric Reaction of 20 AMeV
  124Sn+27Al as a Sensitive Probe of the Onset of Multifragmentation

abstract:
  The cross sections and velocity distributions of heavy residues from the
reaction of 20 AMeV 124Sn + 27Al have been measured at forward angles using the
MARS recoil separator at Texas A&M in a wide mass range. A consistent overall
description of the measured cross sections and velocity distributions was
achieved using a model calculation employing the concept of deep-inelastic
transfer for the primary stage of peripheral collisions, pre-equilibrium
emission and incomplete fusion for the primary stage of more violent central
collisions and the statistical model of multifragmentation (SMM code) for the
deexcitation stage. An alternative calculation employing the sequential binary
decay (GEMINI code) could not reproduce the observed yields of the residues
from violent collisions (A<90) due to different kinematic properties. The
success of SMM demonstrates that the heavy residues originate from events where
a competition of thermally equilibrated fragment partitions takes place rather
than a sequence of binary decays.


title: Identical Particle Interferometry at STAR

abstract:
  We present preliminary results from a two-particle intensity interferometry
analysis of charged pions and neutral kaons emitted from Au+Au collisions at
$\sqrt{s_{NN}}$= 130 and 200 GeV measured in the STAR detector at RHIC. The
dependence of the apparent pion source on beam energy, multiplicity, transverse
momentum and emission angle with respect to the reaction plane are discussed.


title:
$\Xi^{-}$ and $\bar{\Xi}^{+}$ baryon production in Au+Au collisions at
  $\sqrt{s_{NN}}=130$ GeV

abstract:
  We report preliminary results on the centrality dependence of the $\Xi^{-}$
and $\bar{\Xi}^{+}$ production at mid-rapidity in $\sqrt{s_{NN}}=130$ GeV Au+Au
collisions from the STAR experiment. For the most central data the obtained
yields suggest a saturation of strangeness production per produced hadron. The
calculated inverse slope parameter may indicate an earlier freeze-out of these
particles.


title:
Disappearance of back-to-back high $p_T$ hadron correlations in central
  Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

abstract:
  Azimuthal correlations for large transverse momentum charged hadrons have
been measured over a wide pseudo-rapidity range and full azimuth in Au+Au and
p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV. The small-angle correlations
observed in p+p collisions and at all centralities of Au+Au collisions are
characteristic of hard-scattering processes already observed in elementary
collisions. A strong back-to-back correlation exists for p+p and peripheral Au
+ Au. In contrast, the back-to-back correlations are reduced considerably in
the most central Au+Au collisions, indicating substantial interaction as the
hard-scattered partons or their fragmentation products traverse the medium.


title:
Mid-rapidity $\pi^\pm$, $K^\pm$, and $\bar{p}$ spectra and particle
  ratios from STAR

abstract:
  Results are presented on $\pi^\pm$, $K^\pm$, and $\bar{p}$ transverse mass
spectra and particle multiplicity ratios at mid-rapidity in Au+Au collisions at
$\sqrt{s_{_{\rm NN}}}$=130 and 200 GeV and in p+p collisions at $\sqrt{s}$=200
GeV. Comparisons are made to results from lower energies. The bulk properties
of the collision inferred from these results are discussed.


title:
Measurement of the Charge Form Factor of the Neutron $G^{E}_{n}$ from
  ${\vec{d}(\vec{e},e'n)p}$ at $Q^{2}=0.5$ and $1.0 (GeV/c)^{2}$

abstract:
  We determined the electric form factor of the neutron $G_E^n$ via the
reaction ${\vec{d}(\vec{e},e'n)p}$ using a longitudinally polarized electron
beam and a frozen, polarized $^{15}ND_3$ target at Jefferson Lab. The knocked
out neutrons were detected in a segmented plastic scintillator in coincidence
with the quasi-elastically scattered electrons which were tracked in Hall C's
High Momentum Spectrometer. To extract $G_E^n$, we compared the experimental
beam--target asymmetry with theoretical calculations based on different $G_E^n$
models. We report the preliminary results of the fall 2001 run at $Q^{2}=0.5$
and $1.0 (GeV/c)^{2}$.


title: Flow and Bose-Einstein Correlations in Au-Au Collisions at RHIC

abstract:
  Elliptic flow and Bose-Einstein correlations have been measured in Au-Au
collisions at $\sqrt{s_{_{NN}}} =$ 130 and 200 GeV using the PHOBOS detector at
RHIC. The systematic dependencies of the flow signal on the transverse
momentum, pseudorapidity, and centrality of the collision, as well as the beam
energy are shown. In addition, results of a 3-dimensional analysis of two-pion
correlations in the 200 GeV data are presented.


title: Identified particles in Au+Au collisions at sqrt{s_NN} = 200 GeV

abstract:
  The yields of identified particles have been measured at RHIC for Au+Au
collisions at sqrt{s_NN} = 200 GeV using the PHOBOS spectrometer. The ratios of
antiparticle to particle yields near mid-rapidity are presented. The first
measurements of the invariant yields of charged pions, kaons and protons at
very low transverse momenta are also shown.


title: High Precision Laser and Microwave Spectroscopy of Antiprotonic Helium

abstract:
  This talk gives an overview of the recent results on the precision
spectroscopy of antiprotonic helium which was performed by the ASACUSA
collaboration at the Antiproton Decelerator of CERN. The laser spectroscopy of
energy levels of the antiproton has reached a relative accuracy of $\sim
10^{-7}$, and by comparing the experimental value for the transition
wavelengths with theoretical calculations, a CPT test on the equality of proton
and antiproton charge and mass of $<6\times10^{-8}$ has been obtained. In a
recent experiment, the hyperfine structure of the $(n,l)=(37,35)$ state of
antiprotonic helium has been measured for the first time with an accuracy of $3
\times 10^{-5}$.


title: New Outlook on the Possible Existence of Superheavy Elements in Nature

abstract:
  A consistent interpretation is given to some previously unexplained phenomena
seen in nature in terms of the recently discovered long-lived high spin super-
and hyper-deformed isomeric states. The Po halos seen in mica are interpreted
as due to the existence of such isomeric states in corresponding Po or nearby
nuclei which eventually decay by gamma- or beta-decay to the ground states of
210Po, 214Po and 218Po nuclei. The low-energy 4.5 MeV alpha-particle group
observed in several minerals is interpreted as due to a very enhanced alpha
transition from the third minimum of the potential-energy surface in a
superheavy nucleus with atomic number Z=108 (Hs) and atomic mass number around
271 to the corresponding minimum in the daughter.


title:
The reaction $\gamma p \to \pi^\circ \gamma^\prime p$ and the magnetic
  dipole moment of the $\Delta^+(1232)$ resonance

abstract:
  The reaction $\gamma p \to \pi^\circ \gamma^\prime p$ has been measured with
the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI for
energies between $\sqrt{s}$ = 1221--1331 MeV. Cross sections differential in
angle and energy have been determined for all particles in the final state in
three bins of the excitation energy. This reaction channel provides access to
the magnetic dipole moment of the $\Delta^{+}(1232)$ resonance and, for the
first time, a value of $\mu_{\Delta^+} = (2.7_{-1.3}^{+1.0}(stat.) \pm 1.5
(syst.) \pm 3(theo.)) \mu_N$ has been extracted.


title:
$\rho(770)^0$, K$^*(892)^0$ and f$_{0}(980)$ Production in Au-Au and pp
  Collisions at $\sqrt{s_{NN}}$ = 200 GeV

abstract:
  Preliminary results on $\rho(770)^0 \to \pi^{+}\pi^{-}$, K$^{*}(892)^{0} \to
\pi$K and $f_{0}(980) \to \pi^{+}\pi^{-}$ production using the mixed-event
technique are presented. The measurements are performed at mid-rapidity by the
STAR detector in $\sqrt{s_{NN}}$= 200 GeV Au-Au and pp interactions at RHIC.
The results are compared to different measurements at various energies.


title:
Universal Behavior of Charged Particle Production in Heavy Ion
  Collisions

abstract:
  The PHOBOS experiment at RHIC has measured the multiplicity of primary
charged particles as a function of centrality and pseudorapidity in Au+Au
collisions at sqrt(s_NN) = 19.6, 130 and 200 GeV. Two kinds of universal
behavior are observed in charged particle production in heavy ion collisions.
The first is that forward particle production, over a range of energies,
follows a universal limiting curve with a non-trivial centrality dependence.
The second arises from comparisons with pp/pbar-p and e+e- data.
N_tot/(N_part/2) in nuclear collisions at high energy scales with sqrt(s) in a
similar way as N_tot in e+e- collisions and has a very weak centrality
dependence. This feature may be related to a reduction in the leading particle
effect due to the multiple collisions suffered per participant in heavy ion
collisions.


title:
Measurements of Photon and Neutral Pion Production in Heavy Ion
  Collisions at RHIC

abstract:
  Inclusive transverse momentum spectra of photons and neutral pions about
mid-rapidity are presented for Au+Au collisions at sqrt(s_NN} = 130 GeV. Photon
pair conversions have been reconstructed from charged tracks measured with the
central Time Projection Chamber (TPC) of STAR. Contributions of the pi^0 ->
\gamma\gamma decay in the inclusive photon spectra have been studied. It was
found that this contribution begins to decrease at a transverse momentum of
1.65 GeV/c in the top 11% most central centrality class.


title: Experimental summary on global observables, hadron spectra and ratios

abstract:
  This article summarizes results on global observables, hadron spectra, and
ratios of integrated hadron yields as presented at the Quark Matter 2002
Conference.


title:
Separation of the Longitudinal and Transverse Cross Sections in the
  p(ee'K)Lambda and p(ee'K)Sigma Reactions

abstract:
  We report measurements of cross sections for the reaction p(e,e'K)Y, for both
the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and
four-momentum transfers 0.5<Q2<2 (GeV/c)2. Data were taken for three values of
virtual photon polarization, allowing the decomposition of the cross sections
into longitudinal and transverse components. The Lambda data is a revised
analysis of prior work, whereas the Sigma_0 results have not been previously
reported.


title: High resolution hypernuclear spectroscopy using the (e,e'K+) reaction

abstract:
  High energy CW electron beams at new accelerator facilities allow
electromagnetic production and precision study of hypernuclear structure, and
we report here on the first experiment demonstrating the usefulness of the
(e,e'K+) reaction. This experiment is also the first to take advantage of the
enhanced virtual photon flux available when electrons are scattered at
approximately zero degrees. The observed resolution, ~900 keV, of the
12B(hypernuclear) spectrum is the best yet attained using magnetic
spectrometers. The positions of the major excitations are in agreement with
theoretical predictions and the previous binding energy measurements.


title:
Search for DCC in relativistic heavy-ion collisions : Possibilities and
  Limitations

abstract:
  The experimental observation of disoriented chiral condensate is affected due
to various physical and detector related effects. We study and quantify the
strength of the experimental signal, ``neutral pion fraction'' within the
framework of a simple DCC model, using the analysis methods based on the
multi-resolution discrete wavelet technique and by evaluating the signal to
background ratio. The scope and limitations of DCC search in heavy-ion
collision experiments using various combination of detector systems are
investigated.


title: Charge Particle Angular Correlations from Leading Photons at RHIC

abstract:
  We report on the observation of jet-like azimuthal and pseudorapidity
correlations between the highest $p_T$ photon (leading photon) and charged
hadrons produced in both p+p and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV.


title:
Cross Section Measurement of Charged Pion Photoproduction from Hydrogen
  and Deuterium

abstract:
  We have measured the differential cross section for the gamma n --> pi- p and
gamma p --> pi+ n reactions at center of mass angle of 90 degree in the photon
energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at photon
energies greater than 3.3 GeV exhibit a global scaling behavior for both pi-
and pi+ photoproduction, consistent with the constituent counting rule and the
existing pi+ photoproduction data. Possible oscillations around the scaling
value are suggested by these new data The data show enhancement in the scaled
cross section at a center-of-mass energy near 2.2 GeV. The cross section ratio
of exclusive pi- to pi+ photoproduction at high energy is consistent with the
prediction based on one-hard-gluon-exchange diagrams.


title:
Production of $^{3}_{\Lambda}H$ and $^{4}_{\Lambda}H$ in Central 11.5
  GeV/c Au + Pt Heavy Ion Collisions

abstract:
  We present measurements from BNL AGS Experiment E864 of the $^{3}_{\Lambda}H$
invariant multiplicity and of the 90% Confidence Level upper limit on the
$^{4}_{\Lambda}H$ yield in central 11.5 A GeV/c Au + Pt collisions. The
measurements span a rapidity range from center of mass, $y_{cm}$, to $y_{cm}$+1
and a transverse momentum range of $0.< p_{T}\le 1.5$ GeV/c. We compare these
results with E864 measurements of stable light nuclei and particle unstable
nuclei yields of the same baryon number. The implications of these results for
the coalescence of strange clusters are discussed.


title:
Studies on the electromagnetic structure of the nucleon by free and
  quasi-free Compton scattering at MAMI (Mainz)

abstract:
  Using hydrogen and deuterium targets, Compton scattering by the proton and
neutron have been studied at the tagged photon beam of the MAMI (Mainz)
accelerator using different experimental setups. The theoretical tools for the
analysis of the experimental data have been investigated, as there are the
nonsubtracted dispersion theory and the theory of quasi-free reactions on the
proton and neutron bound in the deuteron. Experimental Compton scattering data
are understood in the first and second resonance region with good precision.
Precise electromagnetic polarizabilities and spin polarizabilities for the
proton and neutron have been determined.


title: Transverse Dynamics at RHIC

abstract:
  Studies of <p_{T}>, transverse momentum spectra and anisotropy flow from
nuclear collisions at RHIC indicate early thermalization and strong collective
expansion. We propose a systematic study of the anisotropy parameter $v_2$ and
the transverse momentum distributions of $\phi, \Omega, D^0, \Lambda_C$ and $J
/ \psi$ in order to extract information on partonic collective flow.


title: On the alpha activity of natural tungsten isotopes

abstract:
  The indication for the alpha decay of 180-W with a half-life
T1/2=1.1+0.8-0.4(stat)+-0.3(syst)x10^18 yr has been observed for the first time
with the help of the super-low background 116-CdWO_4 crystal scintillators. In
conservative approach the lower limit on half-life of 180-W has been
established as T1/2>0.7x10^18 yr at 90% C.L. Besides, new T1/2 bounds were set
for alpha decay of 182-W, 183-W, 184-W and 186-W at the level of 10^20 yr.


title: The Forward Time Projection Chamber (FTPC) in STAR

abstract:
  Two cylindrical forward TPC detectors are described which were constructed to
extend the phase space coverage of the STAR experiment to the region 2.5 <
|\eta| < 4.0. For optimal use of the available space and in order to cope with
the high track density of central Au+Au collisions at RHIC, a novel design was
developed using radial drift in a low diffusion gas. From prototype
measurements a 2-track resolution of 1-2 mm is expected.


title:
Long range hadron density fluctuations at soft pT in Au+Au collisions at
  RHIC

abstract:
  Dynamic fluctuations in the local density of non-identified hadron tracks
reconstructed in the STAR TPC are studied using the discrete wavelet transform
power spectrum technique which involves mixed event reference sample
comparison. The two-dimensional event-by-event analysis is performed in
pseudo-rapidity eta and azimuthal angle phi in bins of transverse momentum pT.
HIJING simulations indicate that jets and mini-jets result in characteristic
signals, visible already at soft pT, when the dynamic texture analysis is
applied. In this analysis, the discrepancy between the experiment and the
HIJING expectations for Au+Au at sqrt(S_NN)=200 GeV is most prominent in the
central collisions where we observe the long range fluctuations to be enhanced
at low pT, and suppressed above pT = 0.6 GeV.


title: Inclusive pion double charge exchange on Oxygen(16) at 0.6-1.1 GeV

abstract:
  The inclusive pion double charge exchange (DCX) on oxygen nuclei has been
measured in the region where additional pion production is kinematically
forbidden. The experiment was performed at ITEP PS at incident pi- kinetic
energies T_0= 0.59, 0.75 and 1.1 GeV. The integrated forward differential cross
section was found to decrease with energy slowly. At 1.1 GeV it exceeds the
theoretical prediction within the conventional sequential single charge
exchange mechanism with a neutral pion in the intermediate state (Glauber
elastic rescattering) by about half an order of magnitude. The sequential
mechanism with two pions in the intermediate state (Glauber inelastic
rescatterings), which was proposed recently, seems to be able to explain the
observed slow energy dependence and allows to predict the DCX cross section for
higher energies.


title:
$\Omega^-$ and $\bar\Omega^+$ production in Au+Au collisions at
  $\sqrt{s_{NN}}$ = 130 and 200 GeV

abstract:
  Mid-rapidity Omega and anti-Omega production in Au+Au collisions at RHIC is
studied with the STAR experiment. We report preliminary results on yields and
spectra at $\sqrt{s_{NN}}$ = 130 and 200 GeV. Production relative to negatively
charged hadrons (h-) as well as thermal freeze-out and collective expansion are
discussed.


title: High Transverse Momentum Results from the STAR Collaboration

abstract:
  The STAR collaboration presents new measurements of high p_T hadron
production in Au+Au and p+p collisions at RHIC. We extend the previously
reported suppression of inclusive hadron and large azimuthal anisotropies to
much higher transverse momentum, decisively establishing the existence of
strong medium effects on hadron production well into the perturbative regime.
Near-angle two-particle correlations show directly that hadrons at pT > 4 GeV/c
result from the fragmentation of jets. Additional evidence for the onset of
perturbative QCD in this region comes from the flavor dependence of the
inclusive yields and elliptic flow. Finally, comparison of back-to-back hadron
pairs at high pT in p+p and in Au+Au collisions at various centralities reveals
a striking suppression of high pT back-to-back pairs in the most central Au+Au
collisions. All of these phenomena suggest a picture in which partons or their
hadronic fragments are strongly absorbed in the bulk matter, with the observed
hadrons resulting from jets produced on the periphery of the collision zone and
directed outwards.


title: Interplay of correlations and fluctuations in Au+Au collisions at RHIC

abstract:
  Dynamic fluctuations in the local density of non-identified hadron tracks
reconstructed in the STAR TPC are studied using the discrete wavelet transform
power spectrum technique which involves mixed event reference sample
comparison. The two-dimensional event-by-event analysis is performed in
pseudo-rapidity (eta) and azimuthal angle (phi). HIJING simulations indicate
that jets and mini-jets result in signals, visible without high pT selection,
when the dynamic texture analysis is applied. Scanning a broad range of event
multiplicities, we study the dependence of the signals on the initial
conditions. Event structures are studied separately with positive and negative
tracks, as well as both charges. A change of regime is observed in AuAu
collisions at sqrt(S_NN}=130 GeV as event multiplicity is increased: a long
range eta correlation (or suppressed fluctuation vis-a-vis mixed events) is
seen in same charge data. This effect is qualitatively similar to one of the
predicted manifestations of the Color Glass Condensate.


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

abstract:
  TRIUMF experiment 497 has measured the parity violating longitudinal
analyzing power, A_z, in pp elastic scattering at 221.3 MeV incident proton
energy. This paper includes details of the corrections, some of magnitude
comparable to A_z itself, required to arrive at the final result. The largest
correction was for the effects of first moments of transverse polarization. The
addition of the result, A_z=(0.84 \pm 0.29 (stat.) \pm 0.17 (syst.)) \times
10^{-7}, to the pp parity violation experimental data base greatly improves the
experimental constraints on the weak meson-nucleon coupling constants
h^{pp}_\rho and h^{pp}_\omega, and has implications for the interpretation of
electron parity violation experiments.


title: Soft Physics in STAR

abstract:
  The STAR Experiment at RHIC is well-suited to making measurements of particle
yields from relativistic nuclear collisions in the low transverse momentum, or
"soft", regime. We present preliminary results on measurements of pion (0,-,+),
kaon (-,+,0short), rho, K*0 + anti-K*0, f0, proton, antiproton, phi, Lambda,
anti-Lambda, Xi, anti-Xi, Omega, and anti-Omega from the first two years of
physics running at RHIC. An abundance of physics topics can be addressed by
these measurements, some of which are discussed here along with the results.


title:
Polarization Transfer in the ^4He(\vec e,e'\vec p)^3H Reaction up to Q^2
  = 2.6 (GeV/c)^2

abstract:
  We have measured the proton recoil polarization in the ^4He(\vec e,e'\vec
p)^3H reaction at Q^2 = 0.5, 1.0, 1.6, and 2.6 (GeV/c)^2. The measured ratio of
polarization transfer coefficients differs from a fully relativistic
calculation, favoring the inclusion of a predicted medium modification of the
proton form factors based on a quark-meson coupling model. In contrast, the
measured induced polarizations agree reasonably well with the fully
relativistic calculation indicating that the treatment of final-state
interactions is under control.


title:
Precision spectroscopy of pionic 1s states of Sn nuclei and evidence for
  partial restoration of chiral symmetry in the nuclear medium

abstract:
  Deeply bound 1s states of $\pi^-$ in $^{115,119,123}$Sn were preferentially
observed using the Sn($d$,$^3$He) pion-transfer reaction under the recoil-free
condition. The 1s binding energies and widths were precisely determined, and
were used to deduce the isovector parameter of the s-wave pion-nucleus
potential to be $b_1 =-0.115\pm 0.007 ~m_{\pi}^{-1}$. The observed enhancement
of $|b_1|$ over the free $\pi N$ value ($b_1^{\rm free}/b_1 = 0.78 \pm 0.05$)
indicates a reduction of the chiral order parameter, $f^{*}_{\pi}
(\rho)^2/f_{\pi}^2 \approx 0.64$, at the normal nuclear density, $\rho =
\rho_0$.


title:
Strange anti-particle to particle ratios at mid-rapidity in sqrt(s_NN)=
  130 GeV Au+Au Collisions

abstract:
  Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71
+/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05
(sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092
+/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au
collisions using the STAR detector. The ratios indicate that a fraction of the
net-baryon number from the initial system is present in the excess of hyperons
over anti-hyperons at mid-rapidity. The trend in the progression of the baryon
ratios, with increasing strange quark content, is similar to that observed in
heavy-ion collisions at lower energies. The value of these ratios may be
related to the charged kaon ratio in the framework of simple quark-counting and
thermal models.


title:
Fragment Production in Non-central Collisions of Intermediate Energy
  Heavy Ions

abstract:
  The defining characteristics of fragment emission resulting from the
non-central collision of 114Cd ions with 92Mo target nuclei at E/A = 50 MeV are
presented. Charge correlations and average relative velocities for mid-velocity
fragment emission exhibit significant differences when compared to standard
statistical decay. These differences associated with similar velocity
dissipation are indicative of the influence of the entrance channel dynamics on
the fragment production process.


title:
Measurement of Source Chaoticity for Particle Emission in Au+Au
  Collisions at $\sqrt{s_{NN}}$ = 130 GeV using 3-Particle HBT Correlations

abstract:
  Data from the first physics run at the Relativistic Heavy-Ion Collider at
Brookhaven National Laboratory from the STAR experiment have been analyzed
using three-pion correlations to study whether pions are emitted independently
at freezeout. We have made a high-statistics measurement of the three-pion
correlation function and calculated the normalized three-particle correlator to
obtain a quantitative measurement of the degree of chaoticity in the freeze-out
environment.


title:
The Single-Particle Structure of Neutron-Rich Nuclei of Astrophysical
  Interest at the Ornl Hribf

abstract:
  The rapid nuetron-capture process (r process) produces roughly half of the
elements heavier than iron. The path and abundances produced are uncertain,
however, because of the lack of nuclear strucure information on important
neutron-rich nuclei. We are studying nuclei on or near the r-process path via
single-nucleon transfer reactions on neutron-rich radioactive beams at ORNL's
Holifield Radioactive Ion Beam Facility (HRIBF). Owing to the difficulties in
studying these reactions in inverse kinematics, a variety of experimental
approaches are being developed. We present the experimental methods and initial
results.


title:
Identification of High $\rm p_{\perp}$ Particles with the STAR-RICH
  Detector

abstract:
  The STAR-RICH detector extends the particle identification capapbilities of
the STAR experiment for charged hadrons at mid-rapidity. This detector
represents the first use of a proximity-focusing CsI-based RICH detector in a
collider experiment. It provides identification of pions and kaons up to 3
GeV/c and protons up to 5 GeV/c. The characteristics and performance of the
device in the inaugural RHIC run are described.


title: Photoproduction of Pseudoscalar Mesons

abstract:
  Experiments that study the photoproduction of pseudoscalar mesons; pions,
etas and kaons, have the potential to increase our knowledge of baryon and
hyperon resonance properties. Recent experiments at JLab, Mainz, GRAAL, and
Bonn are beginning to produce results in the form of polarization and asymmetry
measurements and determinations of the differential and integrated cross
sections. These new data are essential to the performance of Partial-Wave
Analyses that are less model dependent and coupled-channels calculations that
incorporate unitarity dynamically,combining hadronic reaction channels together
with electromagnetic processes. This approach is necessary to extract resonance
properties and may lead to the identification of missing, but predicted,
resonances. Some recent experimental and phenomenological results for single
and double pseudoscalar meson photoproduction are discussed.


title:
Correlations, Fluctuations, and Flow Measurements from the STAR
  Experiment

abstract:
  New measurements of short-range and long-range two-particle correlations,
azimuthal anisotropy, and event-by-event fluctuations from the STAR experiment
for sqrt{s_{NN}}= 130 and 200 GeV Au+Au collisions are summarized. Striking
evidence is presented for large, non-statistical fluctuations in mean
transverse momentum. Descriptions of the data in terms of phenomenological
source function models are also presented.


title:
The $^{15}$N($\bm\alpha$,$\bm\gamma$)$^{19}$F reaction and
  nucleosynthesis of $^{19}$F

abstract:
  Several resonances in the $^{15}$N($\alpha$,$\gamma$)$^{19}$F reaction have
been investigated in the energy range between 0.6 MeV and 2.7 MeV. Resonance
strengths and branching ratios have been determined. High sensitivity could be
obtained by the combination of the {\sc{dynamitron}} high current accelerator,
the windowless gas target system {\sc{rhinoceros}}, and actively shielded
germanium detectors. Two levels of $^{19}$F could be observed for the first
time in the ($\alpha$,$\gamma$) channel, and several weak branchings below the
detection limits of previous experiments were measured. Two observed resonances
correspond to $\alpha$-cluster states in $^{19}$F which have been assigned
unambiguously. The astrophysical reaction rate is derived from this set of
resonance strengths.


title: Measurements of the 64Zn(n,a)61Ni cross section at En=5.0-6.75 MeV

abstract:
  The experiment of determination of the 64Zn(n,a)61Ni reaction cross section
in the 5.0-6.75 MeV neutron energy range was performed at the 4.5 MV Van de
Graaf accelerator at the Institute of Heavy Ion Physics, Peking University,
Beijing. Double section ionization chamber with grid was used for direct
registration of the reaction products. The cross sections and angular
distributions were extracted from the experimental data. The obtained values
were compared with the results of other authors and theoretical estimations.
The analysis of the experimental data and model calculations were carried out.


title: Recent Results from STAR

abstract:
  Besides an introduction to the Relativistic Heavy-Ion Collider (RHIC) and the
experimental setup of STAR recent results are discussed. These include
anisotropic flow, jets in nucleus-nucleus collisions and ultra-peripheral
heavy-ion collisions.


title:
On possible existence of the dibaryon resonance $d^*_1$ and its role in
  the $np\gamma$ and $pd\gamma$ processes below the pion threshold

abstract:
  We give reasons for the existence of the NN decoupled dibaryon resonance
$d^*_1$(1956). Strong evidence for its presence has first been found in the
energy spectrum of coincident photons emitted at $\pm 90^0$ from the $pp \to
\gamma\gamma X$ process at 216 MeV measured by the DIB2$\gamma$ collaboration
at JINR. As further experimental indications of the $d^*_1$(1956) existence we
present those found in the available photon energy spectra of $np\gamma$,
$pd\gamma$, and $pA\gamma$ reactions below the pion threshold. It is noted that
serious discrepancies between the $np\gamma$ and $pd\gamma$ experimental cross
sections and theoretical calculations can reasonably be explained by the fact
that latter did not take into account the $d^*_1$ effect.


title:
Rapidity Dependence of Charged Particle Yields for Au+Au at sqrt(sNN) =
  200 GeV

abstract:
  Yields of charged particles (pi+, pi-, K+, K-, p and p-bar) have been derived
from spectra measured with BRAHMS for the reaction Au+Au at sqrt(sNN) = 200
GeV, as a function of rapidity in the range y = 0 to y ~ 3 for the 10% most
central events. The yields peak at mid-rapidity with a small decrease in the
range |y| < 1 but they drop significantly at higher rapidities except for the
protons. At y = 0, the K-/pi- ratio is 0.18 +/- 0.02 (syst), very close to the
K+/pi+ ratio equal to 0.19 +/- 0.02 (syst). But at y = 3, K-/pi- drops to 0.12
+/- 0.02 (syst) while K+/pi+ remains constant.


title: Rapidity Dependence of Net-protons at sqrt(s_NN) = 200 GeV

abstract:
  The BRAHMS collaboration has measured inclusive proton and anti-proton
spectra at several rapidities (0 < y < 3) for Au+Au collisions at sqrt(s_NN) =
200 GeV. Rapidity densities of protons, anti-protons, and net-protons
[N(p)-N(p-bar)] are presented as a function of rapidity.


title: Hadronic interaction of eta and eta-prime mesons with nucleons

abstract:
  Due to their short life-time, flavour-neutral mesons cannot be utilized as
free secondary beams or targets, and therefore a study of their interaction
with nucleons is not possible via direct scattering experiments.
  This interaction is, however, accessible via its influence on the energy
dependence - and on the phase space distributions of the cross sections for
reactions in which these mesons are produced.
  In case of the p p --> p p eta reaction the experimentally determined
distributions of the differential cross sections close to the production
threshold cannot be described by taking into account the S-wave proton-proton
and proton-eta interaction only. Here we show that the angular distributions
determined at the COSY-11 facility reveal some evidence for P-wave admixture in
the proton-proton subsystem already at an excess energy as low as Q = 15.5 MeV.
  We also present that one can estimate the relative strength of the
eta-nucleon and eta-prime-nucleon interactions by comparison of the eta and
eta-prime production yield.


title: Jets and Dijets in Au+Au and p+p Collisions at RHIC

abstract:
  Recent data from RHIC suggest novel nuclear effects in the production of high
$p_T$ hadrons. We present results from the STAR detector on high $p_T$ angular
correlations in Au+Au and p+p collisions at $\sqrt{s}=200$ GeV/c. These
two-particle angular correlation measurements verify the presence of a partonic
hard scattering and fragmentation component at high $p_T$ in both central and
peripheral Au+Au collisions. When triggering on a leading hadron with $p_T>$4
GeV, we observe a quantitative agreement between the jet cone properties in p+p
and all centralities of Au+Au collisions. This quantitative agreement indicates
that nearly all hadrons with $p_T>$4 GeV/c come from jet fragmentation and that
jet fragmentation properties are not substantially modified in Au+Au
collisions. STAR has also measured the strength of back-to-back high $p_T$
charged hadron correlations, and observes a small suppression of the
back-to-back correlation strength in peripheral collisions, and a nearly
complete disappearance of back-to-back correlations in central Au+Au events.
These phenomena, toghether with the observed strong suppression of inclusive
yields and large value of elliptic flow at high $p_T$, are consistent with a
model where high $p_T$ hadrons come from partons created near the surface of
the collision region, and where partons that originate or propagate towards the
center of the collision region are substantially slowed or completely absorbed.


title: Scattering of p$\mu$ muonic atoms in solid hydrogen

abstract:
  We present the results of experimental and theoretical study of the
scattering of low energy p$\mu$ atoms in solid hydrogen cooled to 3 K. The
resulting emission of low energy p$\mu$ atoms from the hydrogen layer into the
adjacent vacuum was much higher than that predicted by calculations which
ignored the solid nature of the hydrogen. New differential scattering cross
sections have been calculated for the collisions of p$\mu$ atoms on solid
hydrogen to acount for its quantum crystalline nature. Analysis of the
experimental data performed using such cross sections shows the important role
of the coherent scattering in p$\mu$ atom diffusion. For p$\mu$ energies lower
than the Bragg cutoff limit (2 meV) the elastic Bragg scattering vanishes which
makes the total scattering cross section fall by several orders of magnitude,
and thus the hydrogen target becomes transparent allowing the emission of cold
p$\mu$ atoms to occur.


title: The STAR Photon Multiplicity Detector

abstract:
  Details concerning the design, fabrication and performance of STAR Photon
Multiplicity Detector (PMD) are presented. The PMD will cover the forward
region, within the pseudorapidity range 2.3--3.5, behind the forward time
projection chamber. It will measure the spatial distribution of photons in
order to study collective flow, fluctuation and chiral symmetry restoration.


title:
An ionization chamber for (n,z) reaction cross section measurements on
  gaseous targets

abstract:
  An ionization chamber with gaseous samples has been designed. It has been
tested on the beam of the pulsed reactor IBR-30 of FLNP, JINR-Dubna. The
experiment has been carried out with resonance neutrons. The exposed gas volume
serves as a target for neutron beam. We have compared the chamber to samples on
substrates, the background component due to Li and B microimpurities in this
case is totally absent. It has been tested also the recovery capability of the
chamber after the reactor power pulse using the protons from the 3He(n,p)3H
reaction, alpha-particles from a U-source and a pulsed precision generator.
Moreover the energy resolution of the chamber with its equipment has been
carried out.


title: Neutrinos and Energetics of the Earth

abstract:
  We estimate terrestrial antineutrino and neutrino fluxes according to
different models of Earth composition. We find large variations, corresponding
to uncertainties on the estimated $U$, $Th$ and $K$ abundances in the mantle.
Information on the mantle composition can be derived from antineutrino flux
measurements after subtracting the crust contribution. This requires a good
description of the crust composition in the region of the detector site.
Measurements of terrestrial antineutrinos will provide a direct insight on the
main sources of Earth's heat flow.


title: Global Observations from PHOBOS

abstract:
  Particle production in Au+Au collisions has been measured in the PHOBOS
experiment at RHIC for a range of collision energies. Three empirical
observations have emerged from this dataset which require theoretical
examination. First, there is clear evidence of limiting fragmentation. Namely,
particle production in central Au+Au collisions, when expressed as $dN/d\eta'$
($\eta' \equiv \eta-y_{beam}$), becomes energy independent at high energy for a
broad region of $\eta'$ around $\eta'=0$. This energy-independent region grows
with energy, allowing only a limited region (if any) of longitudinal
boost-invariance. Second, there is a striking similarity between particle
production in e+e- and Au+Au collisions (scaled by the number of participating
nucleon pairs). Both the total number of produced particles and the
longitudinal distribution of produced particles are approximately the same in
e+e- and in scaled Au+Au. This observation was not predicted and has not been
explained. Finally, particle production has been found to scale approximately
with the number of participating nucleon pairs for $N_{part}>65$. This scaling
occurs both for the total multiplicity and for high $\pT$ particles (3 $<\pT<$
4.5 GeV/c).


title: Three-nucleon mechanisms in photoreactions

abstract:
  The $^{12}$C$(\gamma,ppn)$ reaction has been measured for
E$_{\gamma}$=150-800 MeV in the first study of this reaction in a target
heavier than $^3$He. The experimental data are compared to a microscopic many
body calculation. The model, which predicts that the largest contribution to
the reaction arises from final state interactions following an initial pion
production process, overestimates the measured cross sections and there are
strong indications that the overestimate arises in this two-step process. The
selection of suitable kinematic conditions strongly suppresses this two-step
contribution leaving cross sections in which up to half the yield is predicted
to arise from the absorption of the photon on three interacting nucleons and
which agree with the model. The results indicate $(\gamma,3N)$ measurements on
nuclei may be a valuable tool for obtaining information on the nuclear
three-body interaction.


title:
A New Measurement of the Proton Capture Rate on 7Be and the S17(0)
  Factor

abstract:
  The 7Be(p,gamma)8B reaction plays a central role in the evaluation of solar
neutrino fluxes. We report on a new precision measurement of the cross section
of this reaction, following our previous experiment with an implanted target, a
raster scanned beam and the elimination of backscattering losses. The new
measurement incorporates a higher activity 7Be target and a number of
improvements in design and procedure. The cross section at Ec.m. = 850 keV was
measured several times under varying expermental conditions, yielding a value
of S17(Ec.m.=850 keV) = 24.0 +/- 0.5 eV b. Measurements were carried out at
lower energies as well. We obtain from the entire set of measurements an
extrapolated value of S17(0) = 21.2 +/- 0.7 eV b.


title:
New approach of fragment charge correlations in 129Xe+(nat)Sn central
  collisions

abstract:
  A previous analysis of the charge (Z) correlations in the $\Delta Z-<Z>$
plane for Xe+Sn central collisions at 32 MeV/u has shown an enhancement in the
production of equally sized fragments (low $\Delta Z$) which was interpreted as
an evidence for spinodal decomposition. However the signal is weak and rises
the question of the estimation of the uncorrelated yield. After a critical
analysis of its robustness, we propose in this paper a new technique to build
the uncorrelated yield in the charge correlation function. The application of
this method to Xe+Sn central collision data at 32, 39, 45 and 50 MeV/u does not
show any particular enhancement of the correlation function in any $\Delta Z$
bin.


title: Flow and non-flow event anisotropies at the SPS

abstract:
  A study of differential elliptic event anisotropies (v_2) of charged
particles and high-pt pions in 158 AGeV/c Pb+Au collisions is presented.
Results from correlations with respect to the event plane and from two-particle
azimuthal correlations are compared. The latter give systematically higher v_2
values at pt>1.2GeV/c providing possibly an evidence of a non-flow semihard
component.


title: Results on Identified Charged Hadrons from the PHENIX Experiment at RHIC

abstract:
  Recent results on identified hadrons from the PHENIX experiment in Au+Au
collisions at mid-rapidity at $\sqrt{s_{NN}}$ = 200 GeV are presented. The
centrality dependence of transverse momentum distributions and particle ratios
for identified charged hadrons are studied.


title: Latest Results from CERES/NA45

abstract:
  In this talk latest results from the analysis of e+e- pairs emitted in Pb+Au
collisions at 40 AGeV/c and a combined analysis of all data available at 158
AGeV/c are presented. The enhancement of low-mass e+e- pairs (m_ee>0.2 GeV/c^2)
with respect to the expected yield from hadron decays first reported at 158
AGeV/c is also found at 40 AGeV/c and is even larger there. Comparing to
various theoretical models based on pi-pi-annihilation, the data can only be
reproduced, if the properties of the intermediate rho in the hot and dense
medium are modified. Theoretically, the modification is linked to baryon
density rather than temperature. Constraints from hadron data taken at the same
beam energies indeed indicate a fireball evolution along a trajectory of higher
baryon density at 40 AGeV/c, consistent with the observed larger enhancement
factor.


title:
A Nuclear Physics Program at the ATLAS Experiment at the CERN Large
  Hadron Collider

abstract:
  The ATLAS collaboration has significant interest in the physics of
ultra-relativistic heavy ion collisions. We submitted a Letter of Intent to the
United States Department of Energy in March 2002. The following document is a
slightly modified version of that LOI. More details are available at:
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/SM/ions


title: Anisotropic flow in 4.2A GeV/c C+Ta collisions

abstract:
  Anisotropic flow of protons and negative pions in 4.2A GeV/c C+Ta collisions
is studied using the Fourier analysis of azimuthal distributions. The protons
exhibit pronounced directed flow. Directed flow of pions is positive in the
entire rapidity interval and indicates that the pions are preferentially
emitted in the reaction plane from the target to the projectile. The elliptic
flow of protons and negative pions is close to zero. Comparison with the
quark-gluon-string model (QGSM) and relativistic transport model (ART 1.0) show
that they both yield a flow signature similar to the experimental data.


title:
Fragment Charge Correlations and Spinodal Decomposition in Finite
  Nuclear Systems

abstract:
  Enhanced production of events with almost equal-sized fragments is
experimentally revealed by charge correlations in the multifragmentation of a
finite nuclear system selected in $^{129}$Xe central collisions on $^{nat}$Sn.
The evolution of their weight with the incident energy: 32, 39, 45, 50 AMeV, is
measured.Dynamical stochastic mean field simulations performed at 32 AMeV, in
which spinodal instabilities are responsible for multifragmentation, exhibit a
similar enhancement of this kind of events. The above experimental observation
evidences the spinodal decomposition of hot finite nuclear matter as the origin
of multifragmentation in the Fermi energy regime.


title: Charged Particle Detection using a CMOS Active Pixel Sensor

abstract:
  Active Pixel Sensor (APS) technology has shown promise for next-generation
vertex detectors. This paper discusses the design and testing of two
generations of APS chips. Both are arrays of 128 by 128 pixels, each 20 by 20
micro-m. Each array is divided into sub-arrays in which different sensor
structures (4 in the first version and 16 in the second) and/or readout
circuits are employed. Measurements of several of these structures under Fe55
exposure are reported. The sensors have also been irradiated by 55 MeV protons
to test for radiation damage. The radiation increased the noise and reduced the
signal. The noise can be explained by shot noise from the increased leakage
current and the reduction in signal is due to charge being trapped in the epi
layer. Nevertheless, the radiation effect is small for the expected exposures
at RHIC and RHIC II. Finally, we describe our concept for mechanically
supporting a thin silicon wafer in an actual detector.


title:
Time evolution of the fission-decay width under the influence of
  dissipation

abstract:
  Different analytical approximations to the time-dependent fission-decay width
used to extract the influence of dissipation on the fission process are
critically examined. Calculations with a new, highly realistic analytical
approximation to the exact solution of the Fokker-Planck equation sheds doubts
on previous conclusions on the dissipation strength made on the basis of less
realistic approximations.


title:
Charged hadron transverse momentum distributions in Au+Au collisions at
  $\sqrt{s_{_{NN}}} =$ 200 GeV

abstract:
  We present transverse momentum distributions of charged hadrons produced in
Au+Au collisions at $\sqrt{s_{_{NN}}} =$ 200 GeV. The evolution of the spectra
for transverse momenta $p_T$ from 0.25 to 5 GeV/C is studied as a function of
collision centrality. We find a significant change of the spectral shape
between proton-antiproton and peripheral Au+Au collisions. When comparing
peripheral to central Au+Au collisions, we find that the yields at the highest
$p_T$ exhibit approximate scaling with the number of participating nucleons,
rather than scaling with the number of binary collisions.


title:
Measurement of the R$_{LT}$ response function for $\pi^0$
  electroproduction at $Q^2$ = 0.070 (GeV/c)$^2$ in the $N\to\Delta$
  transition}

abstract:
  Quadrupole amplitudes in the $\gamma^{*}N\to\Delta$ transition are associated
with the issue of nucleon deformation. A search for these small amplitudes has
been the focus of a series of measurements undertaken at Bates/MIT by the OOPS
collaboration. We report on results from H$(e,e^\prime p)\pi^0$ data obtained
at $Q^2= 0.070$ (GeV/c)$^2$ and invariant mass of W=1155 MeV using the
out-of-plane detection technique with the OOPS spectrometers. The $\sigma_{LT}$
and $\sigma_{T}+\epsilon\cdot$ $\sigma_{L}$ response functions were isolated.
These results, along with those of previous measurements at $W$=1172 MeV and
$Q^2= 0.127$ (GeV/c)$^2$, aim in elucidating the interplay between resonant and
non resonant amplitudes.


title: Directed and Elliptic Flow in Pb+Pb collisions at 40 and 158 AGeV

abstract:
  Directed and elliptic flow are reported for charged pions and protons as a
function of transverse momentum, rapidity, and centrality in 40 and 158 AGeV Pb
+ Pb collisions. The standard method of correlating particles with an event
plane is used. The directed flow of protons is small and shows little variation
near to midrapidity, but rises fast towards projectile rapidity in the 40 AGeV
data. For most peripheral collisions the flat region becomes negative resulting
in $v_1$ changing sign three times. Elliptic flow doesn't seem to change very
much from 40 AGeV to 158 AGeV. The difference is smaller than anticipated from
the overall energy dependence from AGS to RHIC.


title:
Study of the reaction pp \to pp$\pi^{0}$ within 10 MeV above the
  threshold

abstract:
  Kinematically complete measurements of the $pp\to pp\pi^{0}$ reaction were
performed for beam energies in the range $292 - 298 $MeV. By detecting both
protons in coincidence with the large acceptance COSY-TOF spectrometer set up
at an external beam line of the proton synchrotron COSY-J\"ulich, total and
differential cross sections and energy distributions were obtained. A strong
enhancement is observed in the Dalitz plots resulting from the final state
interaction between the outgoing proton pair; the data are well reproduced by
Monte Carlo simulations with standard parameters for scattering length
$a_0$=-7.83 fm and effective range $r_0$=2.8 fm. The total cross sections
exceed the ones measured recently in internal target experiments at IUCF and
CELSIUS by roughly 50%. Arguments are presented which link this discrepancy
with the effect of the final state interaction pushing yield into the very
small-angle region and the near-impossibility of an internal target experiment
to cover just this range.


title: Breakup of $^{17}$F on $^{208}$Pb near the Coulomb barrier

abstract:
  Angular distributions of oxygen produced in the breakup of $^{17}$F incident
on a $^{208}$Pb target have been measured around the grazing angle at beam
energies of 98 and 120 MeV. The data are dominated by the proton stripping
mechanism and are well reproduced by dynamical calculations. The measured
breakup cross section is approximately a factor of 3 less than that of fusion
at 98 MeV. The influence of breakup on fusion is discussed.


title:
Non-identical particle correlation analysis as a probe of transverse
  flow

abstract:
  Non-identical two particle correlation functions probe asymmetries between
the average space-time emission points of different particle species. The
system collective expansion would produce such asymmetry because massive
particles, such as protons, are on average more pushed towards the edge of the
system, than lighter ones, i.e. pions. Measuring pion-kaon, pion-proton and
kaon-proton correlation functions, using the STAR detector, we show that the
data are consistent with the effect of transverse flow in Au-Au collisions at
$\sqrt{s_{NN}} = 130$ GeV.


title: Optical Alignment System for the PHENIX Muon Tracking Chambers

abstract:
  A micron-precision optical alignment system (OASys) for the PHENIX muon
tracking chambers is developed. To ensure the required mass resolution of
vector meson detection, the relative alignment between three tracking station
chambers must be monitored with a precision of 25$\mu$m. The OASys is a
straightness monitoring system comprised of a light source, lens and CCD
camera, used for determining the initial placement as well as for monitoring
the time dependent movement of the chambers on a micron scale.


title:
Comparison of Source Images for protons, $\pi^-$'s and $\Lambda$'s in 6
  AGeV Au+Au collisions

abstract:
  Source images are extracted from two-particle correlations constructed from
strange and non-strange hadrons produced in 6 AGeV Au + Au collisions. Very
different source images result from pp vs p$\Lambda$ vs $\pi^-\pi^-$
correlations. These observations suggest important differences in the
space-time emission histories for protons, pions and neutral strange baryons
produced in the same events.


title: Fast Neutron Resonance Radiography in a Pulsed Neutron Beam

abstract:
  The feasibility of performing fast neutron resonance radiography at the PTB
accelerator facility is studied. A neutron beam of a broad spectral
distribution is produced by a pulsed 13 MeV deuterium beam hitting a thick Be
target. The potential of 3 different neutron imaging detectors with time-of
flight capability are investigated. The applied methods comprise wire chambers
with hydrogenous converter layers and a fast plastic scintillator with
different optical readout schemes. We present the neutron facility, the imaging
methods employed and results obtained. in beam experiments where samples of
carbon rods with various length and diameter were imaged to study resolution
and sensitivity of the method.


title: Status on nucleon electromagnetic form factors

abstract:
  Nucleon electromagnetic form factors are fundamental quantities related to
the charge and magnetization distributions inside the nucleon. Understanding
the nucleon electromagnetic structure in terms of the underlying quark and
gluon degrees of freedom of quantum chromodynamics is a challenging and urgent
task. The nucleon electromagnetic form factors have been studied in the past
extensively from unpolarized electron scattering experiments. With the
development in polarized beam, recoil polarimetry, and polarized target
technologies, polarization experiments have provided more precise data on these
quantities. At the same time, significant theoretical progress in areas ranging
from effective field theories to lattice QCD calculations, has been made in
describing these data. In this article, we review recent experimental and
theoretical progress on this subject. we also provide future outlook on this
topic.


title:
Investigation of Light Nucleus Clustering in Relativistic
  Multifragmentation Processes

abstract:
  The use of emulsions for studying nuclear clustering in light nucleus
fragmentation processes at energies higher than 1A GeV is discussed. New
results on the topologies of relativistic Li-7 and B-10 nucleus fragmentation
in peripheral interactions are given. A program of research of the cluster
structure in stable and radioactive nuclei is suggested.


title: The Muon Anomalous Magnetic Moment and the Standard Model

abstract:
  The muon anomalous magnetic moment measurement, when compared with theory,
can be used to test many extensions to the standard model. The most recent
measurement made by the Brookhaven E821 Collaboration reduces the uncertainty
on the world average of a_mu to 0.7 ppm, comparable in precision to theory.
This paper describes the experiment and the current theoretical efforts to
establish a correct standard model reference value for the muon anomaly.


title: Azimuthally-sensitive pion HBT at RHIC

abstract:
  The STAR Collaboration has measured two-pion correlation functions versus
emission angle with respect to the event plane in non-central Au+Au collisions
at \sqrt{s_{NN}}=130, 200 GeV. In the context of a parameterized freezeout
scenario, the data suggest an out-of-plane freezeout geometry, and a rapid
system evolution to freezeout.


title:
Trap Activation Energy and Transport Parameters of HgI$_2$ Crystals for
  Bubble-Plasma Diagnostics

abstract:
  In recent data on neutron induced acoustic cavitation in
deuterium--containing liquids obtained by neutron measurements it was shown
that very high temperatures could arise in some special cases. To study
temperature of so--called bubble plasma it is desirable to have
micro--detectors of X-rays, which can be prepared on the basis of
room--temperature semiconductor detectors, in particular on mercuric iodide
($\alpha$--HgI$_2$) crystals. Having in view this aim, the properties of
gel--grown ($\alpha$--HgI$_2$) crystals was studied by means of isothermal
currents, and trap parameters was estimated. Results are promising for special
aim of preparing X-ray detectors with moderate energy resolution needed in
bubble--plasma diagnostic, though improving of crystal growing technology is
necessary.
  {\it PACS:} 29.40.Wk; 52.70.La {\it Keywords:} X-ray and gamma--ray
measurements; semiconductor detectors; mercuric iodide; plasma diagnostics;
cavitation


title: A Search for various Double Beta Decay Modes of Cd, Te and Zn Isotopes

abstract:
  Various double beta decay modes of Cd, Zn and Te isotopes are explored with
the help of CdTe and CdZnTe semiconductor detectors. The data set is splitted
in an energy range below 1 MeV having a statistics of 134.5 g$\cdot$d and one
above 1 MeV resulting in 532 g$\cdot$d. No signals were observed in all
channels under investigation. New improved limits for the neutrinoless double
beta decay of Zn70 of $T_{1/2} > 1.3 \cdot 10^{16} yrs$ (90% CL), the longest
standing limit of all double beta isotopes, and 0$\nu\beta^+$EC of Te120 of
$T_{1/2} > 2.2 \cdot 10^{16} yrs$ (90% CL) are given. For the first time a
limit on the half-life of the 2$\nu$ECEC of $^{120}$Te of $T_{1/2} > 9.4 \cdot
10^{15} yrs$ (90% CL) is obtained. In addition, limits on 2$\nu$ECEC for ground
state transitions of Cd106, Cd108 and Zn64 are improved. The obtained results
even under rough background conditions show the reliability of CdTe
semiconductor detectors for rare nuclear decay searches.


title:
Observation of Nuclear Scaling in the $A(e,e^{\prime})$ Reaction at
  $x_B>$1

abstract:
  The ratios of inclusive electron scattering cross sections of $^4$He,
$^{12}$C, and $^{56}$Fe to $^3$He have been measured for the first time. It is
shown that these ratios are independent of $x_B$ at Q$^2>$1.4 (GeV/c)$^2$ for
$x_B>$ 1.5 where the inclusive cross section depends primarily on the
high-momentum components of the nuclear wave function. The observed scaling
shows that the momentum distributions at high-momenta have the same shape for
all nuclei and differ only by a scale factor. The observed onset of the scaling
at Q$^2>$1.4 and $x_B >$1.5 is consistent with the kinematical expectation that
two nucleon short range correlations (SRC) are dominate the nuclear wave
function at $p_m\gtrsim$ 300 MeV/c. The values of these ratios in the scaling
region can be related to the relative probabilities of SRC in nuclei with
A$\ge$3. Our data demonstrate that for nuclei with A$\geq$12 these
probabilities are 5-5.5 times larger than in deuterium, while for $^4$He it is
larger by a factor of about 3.5.


title:
Directed flow in Au+Au, Xe+CsI and Ni+Ni collisions and the nuclear
  equation of state

abstract:
  We present new experimental data on directed flow in collisions of Au+Au,
Xe+CsI and Ni+Ni at incident energies from 90 to 400A MeV. We study the
centrality and system dependence of integral and differential directed flow for
particles selected according to charge. All the features of the experimental
data are compared with Isospin Quantum Molecular Dynamics (IQMD) model
calculations in an attempt to extract information about the nuclear matter
equation of state (EoS). We show that the combination of rapidity and
transverse momentum analysis of directed flow allow to disentangle various
parametrizations in the model. At 400A MeV, a soft EoS with momentum dependent
interactions is best suited to explain the experimental data in Au+Au and
Xe+CsI, but in case of Ni+Ni the model underpredicts flow for any EoS. At 90A
MeV incident beam energy, none of the IQMD parametrizations studied here is
able to consistently explain the experimental data.


title:
Search for Time-Reversal Violation in the beta-Decay of Polarized 8Li
  Nuclei

abstract:
  The transverse polarization of electrons emitted in the beta-decay of
polarized 8Li nuclei has been measured. For the time reversal violating triple
correlation parameter we find R = (0.9 +- 2.2)x10^{-3}. This result is in
agreement with the standard model and yields improved constraints on exotic
tensor contributions to the weak interaction. It also provides a new limit on
the mass of a possible scalar leptoquark, m_{LQ} > 560 GeV/c^2 (90% C.L.).


title: Experiments for Double-Beta Decay

abstract:
  The recent neutrino oscillation experimental results indicate that at least
one neutrino has a mass greater than 50 meV. The next generation of double-beta
decay experiments will very likely have a sensitivity to an effective Majorana
neutrino mass below this target. Therefore this is a very exciting time for
this field of research as even null results from these experiments have the
potential to elucidate the nature of the neutrino.


title:
Measurement of the Polarized Structure Function $\sigma_{LT^\prime}$ for
  $p(\vec{e},e'p)\pi^o$ in the $\Delta(1232)$ Resonance Region

abstract:
  The polarized longitudinal-transverse structure function $\sigma_{LT^\prime}$
has been measured in the $\Delta(1232)$ resonance region at $Q^2=0.40$ and 0.65
GeV$^2$. Data for the $p(\vec e,e'p)\pi^o$ reaction were taken at Jefferson Lab
with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally
polarized electrons at an energy of 1.515 GeV. For the first time a complete
angular distribution was measured, permitting the separation of different
non-resonant amplitudes using a partial wave analysis. Comparison with previous
beam asymmetry measurements at MAMI indicate a deviation from the predicted
$Q^2$ dependence of $\sigma_{LT^{\prime}}$ using recent phenomenological
models.


title: Probing Transport Theories via Two-Proton Source Imaging

abstract:
  Imaging technique is applied to two-proton correlation functions to extract
quantitative information about the space-time properties of the emitting source
and about the fraction of protons that can be attributed to fast emission
mechanisms. These new analysis techniques resolve important ambiguities that
bedeviled prior comparisons between measured correlation functions and those
calculated by transport theory. Quantitative comparisons to transport theory
are presented here. The results of the present analysis differ from those
reported previously for the same reaction systems. The shape of the two-proton
emitting sources are strongly sensitive to the details about the in-medium
nucleon-nucleon cross sections and their density dependence.


title:
Narrowing of the Balance Function with Centrality in Au+Au Collisions at
  sqrt(sNN) = 130 GeV

abstract:
  The balance function is a new observable based on the principle that charge
is locally conserved when particles are pair produced. Balance functions have
been measured for charged particle pairs and identified charged pion pairs in
Au+Au collisions at $\sqrt{s_{NN}}$ = 130 GeV at the Relativistic Heavy Ion
Collider using STAR. Balance functions for peripheral collisions have widths
consistent with model predictions based on a superposition of nucleon-nucleon
scattering. Widths in central collisions are smaller, consistent with trends
predicted by models incorporating late hadronization.


title:
The STAR Time Projection Chamber: A Unique Tool for Studying High
  Multiplicity Events at RHIC

abstract:
  The STAR Time Projection Chamber (TPC) is used to record collisions at the
Relativistic Heavy Ion Collider (RHIC). The TPC is the central element in a
suite of detectors that surrounds the interaction vertex. The TPC provides
complete coverage around the beam-line, and provides complete tracking for
charged particles within +- 1.8 units of pseudo-rapidity of the center-of-mass
frame. Charged particles with momenta greater than 100 MeV/c are recorded.
Multiplicities in excess of 3,000 tracks per event are routinely reconstructed
in the software. The TPC measures 4 m in diameter by 4.2 m long, making it the
largest TPC in the world.


title: Final State Interaction Effects in pol 3He(pol e,e'p)

abstract:
  Asymmetries in quasi-elastic pol 3He(pol e,e'p) have been measured at a
momentum transfer of 0.67 (GeV/c)^2 and are compared to a calculation which
takes into account relativistic kinematics in the final state and a
relativistic one-body current operator. With an exact solution of the Faddeev
equation for the 3He-ground state and an approximate treatment of final state
interactions in the continuum good agreement is found with the experimental
data.


title:
Comparison of the Total Charged-Particle Multiplicity in High-Energy
  Heavy Ion Collisions with e+e- and pp/pbar-p Data

abstract:
  The PHOBOS experiment at RHIC has measured the total multiplicity of primary
charged particles as a function of collision centrality in Au+Au collisions at
sqrt(s_NN) = 19.6, 130 and 200 GeV. Above sqrt(s_NN) ~ 20 GeV, the total
multiplicity per participating nucleon pair (<N_ch>/<N_part/2>) in central
events scales with sqrt(s) in the same way as <N_ch> in e+e- data. This is
suggestive of a universal mechanism of particle production in
strongly-interacting systems, controlled mainly by the amount of energy
available for particle production (per participant pair for heavy ion
collisions). The same effect has been observed in pp/pbar-p data after
correcting for the energy taken away by leading particles. An approximate
independence of <N_ch>/<N_part/2> on the number of participating nucleons is
also observed, reminiscent of ``wounded nucleon'' scaling (<N_ch> proportional
to <N_part>), but with the constant of proportionality set by the multiplicity
measured in e+e- data rather than by pp/pbar-p data.


title:
Fragmentation in Peripheral Heavy-Ion Collisions: from Neck Emission to
  Spectator Decays

abstract:
  Invariant cross sections of intermediate mass fragments in peripheral
collisions of Au on Au at incident energies between 40 and 150 AMeV have been
measured with the 4-pi multi-detector INDRA. The maximum of the fragment
production is located near mid-rapidity at the lower energies and moves
gradually towards the projectile and target rapidities as the energy is
increased. Schematic calculations within an extended Goldhaber model suggest
that the observed cross-section distributions and their evolution with energy
are predominantly the result of the clustering requirement for the emerging
fragments and of their Coulomb repulsion from the projectile and target
residues. The quantitative comparison with transverse energy spectra and
fragment charge distributions emphasizes the role of hard scattered nucleons in
the fragmentation process.


title:
Study of the p p -> p p pi+ pi- Reaction in the Low-Energy Tail of the
  Roper Resonance

abstract:
  Exclusive measurements of the p p -> p p pi+ pi- reaction have been carried
out at Tp = 775 MeV at CELSIUS using the PROMICE/WASA setup. Together with data
obtained at lower energy they point to a dominance of the Roper excitation in
this process. From the observed interference of its decay routes N* -> N sigma
and N* -> Delta pi -> N sigma their energy-dependent relative branching ratio
is determined.


title:
Event-by-event Analysis Methods and Applications to Relativistic
  Heavy-ion Collision Data

abstract:
  Event-scale analysis techniques using correlation and fluctuation measures
are applied to heavy-ion collision data with the goal of discovering,
characterizing, and understanding deconfined quark matter. In service of these
goals development of a scale-local thermodynamics is discussed and applied to a
broad range of toy models, simulations, and data. Scale-local partitioning is
discussed at length and an ideal theoretical reference is derived for
comparison to data. The dimension of the chaotic attractor of the Henon map is
calculated as a function of scale, and the implications of scale-local
dimension are explored. Event spaces with discriminatory power are developed
and applied to the face recognition problem, detector triggering, and STAR and
NA49 data. Event-wise mean transverse momentum fluctuations in STAR data are
analyzed with a minimally biased central-limit based measure using numerical
and graphical methods. Cut efficiencies, corrections, and systematic error
sources are all addressed. A connection between non-statistical fluctuations
and two-particle correlations is found and exploited. Two-particle correlation
space formation is discussed and methods for minimizing error from event mixing
are discovered. Central data from STAR and NA49 are analyzed, confirming the
results of the fluctuation analysis and providing additional insight into the
physics sources contributing to correlations in heavy-ion collisions.


title:
Observation of coherent $\pi^0$ electroproduction on deuterons at large
  momentum transfer

abstract:
  The first experimental results for coherent $\pi^0$-electroproduction on the
deuteron, $e+d\to e+d +\pi^0$, at large momentum transfer, are reported. The
experiment was performed at Jefferson Laboratory at an incident electron energy
of 4.05 GeV. A large pion production yield has been observed in a kinematical
region for 1.1$<Q^2<$1.8 GeV$^2$, from threshold to 200 MeV excitation energy
in the $d\pi^0$ system. The $Q^2$-dependence is compared with theoretical
predictions.