title:
Measurement of the Proton Spin Structure Function $g_1(x,Q^2)$ for $Q^2$
  from 0.15 to 1.6 GeV$^2$ with CLAS

abstract:
  Double-polarization asymmetries for inclusive $ep$ scattering were measured
at Jefferson Lab using 2.6 and 4.3 GeV longitudinally polarized electrons
incident on a longitudinally polarized NH$_3$ target in the CLAS detector. The
polarized structure function $g_1(x,Q^2)$ was extracted throughout the nucleon
resonance region and into the deep inelastic regime, for $Q^2 = 0.15 -1.64
$GeV$^2$. The contributions to the first moment $\Gamma_1(Q^2) = \int
g_1(x,Q^2)dx$ were determined up to $Q^2=1.2$ GeV$^2$. Using a parametrization
for $g_1$ in the unmeasured low $x$ regions, the complete first moment was
estimated over this $Q^2$ region. A rapid change in $\Gamma_1$ is observed for
$Q^2 < 1 $GeV$^2$, with a sign change near $Q^2 = 0.3 $GeV$^2$, indicating
dominant contributions from the resonance region. At $Q^2=1.2$ GeV$^2$ our data
are below the pQCD evolved scaling value.


title:
Probing the isovector transition strength of the low-lying nuclear
  excitations induced by inverse kinematics proton scattering

abstract:
  A compact approach based on the folding model is suggested for the
determination of the isoscalar and isovector transition strengths of the
low-lying ($\Delta S=\Delta T=0$) excitations induced by inelastic proton
scattering measured with exotic beams. Our analysis of the recently measured
inelastic $^{18,20}$O+p scattering data at $E_{\rm lab}=30$ and 43 MeV/nucleon
has given for the first time an accurate estimate of the isoscalar $\beta_0$
and isovector $\beta_1$ deformation parameters (which cannot be determined from
the (p,p') data alone by standard methods) for 2$^+_1$ and $3^-_1$ excited
states in $^{18,20}$O. Quite strong isovector mixing was found in the 2$^+_1$
inelastic $^{20}$O+p scattering channel, where the strength of the isovector
form factor $F_1$ (prototype of the Lane potential) corresponds to a $\beta_1$
value almost 3 times larger than $\beta_0$ and a ratio of nuclear transition
matrix elements $M_n/M_p\simeq 4.2$.


title:
Absence of Suppression in Particle Production at Large Transverse
  Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions

abstract:
  Transverse momentum spectra of charged hadrons with p_T < 8 GeV/c and neutral
pions with p_T < 10 GeV/c have been measured at mid-rapidity by the PHENIX
experiment at RHIC in d+Au collisions at sqrt(s_NN) = 200 GeV. The measured
yields are compared to those in p+p collisions at the same sqrt(s_NN) scaled up
by the number of underlying nucleon-nucleon collisions in d+Au. The yield ratio
does not show the suppression observed in central Au+Au collisions at RHIC.
Instead, there is a small enhancement in the yield of high momentum particles.


title: System size dependence of strangeness production at 158 GeV/n

abstract:
  An enhanced production of strange particles per pion in heavy ion collisions
compared to elementary p+p interactions was observed in Pb+Pb reactions at the
CERN SPS. New results obtained on small colliding systems, C+C and Si+Si, also
show an enhancement. It increases steeply with system size and reaches in the
larger system almost the level measured in Pb+Pb reactions. The shapes of the
transverse mass spectra of strange mesons (K+, K-, phi) and baryons (Lambda,
Antilambda) are consistent with the presence of collective transverse flow,
which is already visible in small systems (C+C) and increases with the system
size. The Antilambda/Lambda ratio together with the K+/K- ratio yields
information about the baryochemical potential mu_B. The potential, determined
at midrapidity, increases with the system size since the stronger stopping
shifts baryons from near beam and projectile rapidity towards midrapidity. For
the 4pi yields mu_B is almost independent of the size of the colliding system.


title: Study of Non-Strange Baryon Resonances with Meson Photoproduction

abstract:
  Photoproduction of mesons is an excellent tool for the study of nucleon
resonances. Complementary to pion induced reactions, photoproduction on the
free proton contributes to the determination of the basic properties of nucleon
resonances like excitation energy, decay widths, spin, and the coupling to the
photon. Photoproduction from light nuclei, in particular from the deuteron,
reveals the isospin structure of the electromagnetic excitation of the nucleon.
During the last few years, progress in this field has been substantial. New
accelerator facilities combined with state-of-the-art detector technologies
have pushed the experiments to unprecedented sensitivity and precision. The
experimental progress has been accompanied by new developments for the reaction
models, necessary to extract the properties of the nucleon states, and for
modern hadron models which try to connect these properties to QCD. The emphasis
of this review lies on the experimental side and focuses on experiments aiming
at precise studies of the low-lying nucleon resonances.


title:
Evidence from d+Au measurements for final-state suppression of high
  $p_T$ hadrons in Au+Au collisions at RHIC

abstract:
  We report measurements of single-particle inclusive spectra and two-particle
azimuthal distributions of charged hadrons at high transverse momentum (high
$p_T$) in minimum bias and central d+Au collisions at $\sqrt{s_{NN}}$=200 GeV.
The inclusive yield is enhanced in d+Au collisions relative to binary-scaled
p+p collisions, while the two-particle azimuthal distributions are very similar
to those observed in p+p collisions. These results demonstrate that the strong
suppression of the inclusive yield and back-to-back correlations at high $p_T$
previously observed in central Au+Au collisions are due to final-state
interactions with the dense medium generated in such collisions.


title:
Centrality dependence of charged hadron transverse momentum spectra in
  d+Au collisions at sqrt(s_NN) = 200 GeV

abstract:
  We have measured transverse momentum distributions of charged hadrons
produced in d+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were obtained
for transverse momenta 0.25 < p_T < 6.0 GeV/c, in a pseudorapidity range of 0.2
< eta < 1.4 in the deuteron direction. The evolution of the spectra with
collision centrality is presented in comparison to p+pbarcollisions at the same
collision energy. With increasing centrality, the yield at high transverse
momenta increases more rapidly than the overall particle density, leading to a
strong modification of the spectral shape. This change in spectral shape is
qualitatively different from observations in Au+Au collisions at the same
energy. The results provide important information for discriminating between
different models for the suppression of high-p_T hadrons observed in Au+Au
collisions.


title: 8Li+alpha decay of 12B and its possible astrophysical implications

abstract:
  The 12B excitation energy spectrum has been obtained from coincidence
measurements of the 9Be+7Li -> 2alpha+8Li reaction at E{0}=52 MeV.
  The decay of the states at excitations between 10 and 16 Mev into alpha$+8Li
has been observed for the first time. Observed alpha-decay indicates possible
cluster structure of the 12B excited states.
  The influence of these states on the cross section of the astrophysically
important 8Li(alpha,n)11B and 9Be+t reactions is discussed and the results are
compared with existing results.


title: Charge symmetry breaking in n p --> d pi^0

abstract:
  The forward--backward asymmetry in n p --> d pi^0, which must be zero in the
center-of-mass system if charge symmetry is respected, has been measured to be
[17.2 +/- 8 (stat) +/- 5.5 (sys)] * 10^{-4}, at an incident neutron energy of
279.5 MeV. This charge symmetry breaking observable was extracted by fitting
the data with GEANT-based simulations and is compared to recent chiral
effective field theory calculations, with implications regarding the value of
the u d quark mass difference.


title:
Three-Pion Hanbury-Brown-Twiss Correlations in Relativistic Heavy-Ion
  Collisions from the STAR Experiment

abstract:
  Data from the first physics run at the Relativistic Heavy-Ion Collider at
Brookhaven National Laboratory, Au+Au collisions at $\sqrt{s_{NN}}=130$ GeV,
have been analyzed by the STAR Collaboration using three-pion correlations with
charged pions 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 of the pion source. It is
found that the degree of chaoticity seems to increase with increasing particle
multiplicity.


title:
Rapidity and Centrality Dependence of Proton and Anti-proton Production
  from Au+Au Collisions at sqrt(sNN) = 130GeV

abstract:
  We report on the rapidity and centrality dependence of proton and anti-proton
transverse mass distributions from Au+Au collisions at sqrt(sNN) = 130GeV as
measured by the STAR experiment at RHIC. Our results are from the rapidity and
transverse momentum range of |y|<0.5 and 0.35 <p_t<1.00GeV/c. For both protons
and anti-protons, transverse mass distributions become more convex from
peripheral to central collisions demonstrating characteristics of collective
expansion. The measured rapidity distributions and the mean transverse momenta
versus rapidity are flat within |y|<0.5. Comparisons of our data with results
from model calculations indicate that in order to obtain a consistent picture
of the proton(anti-proton) yields and transverse mass distributions the
possibility of pre-hadronic collective expansion may have to be taken into
account.


title: Investigation of low spin states in 48-Cr with the MINIBALL spectrometer

abstract:
  Low spin states in the self-conjugate even-even nucleus 48-Cr were
investigated using the MINIBALL gamma-ray spectrometer. At the FN tandem
accelerator in Cologne the 46-Ti(3-He,n) reaction was used for the measurement
of gamma-gamma coincidences for an excitation function from 7 to 12 MeV beam
energy. 17 excited states were observed, nine for the first time by means of
gamma-ray spectroscopy, and new spin assignments were made. No excited states
apart from the ground band were observed below 3.4 MeV.


title: High-p_T charged particle azimuthal correlations at RHIC

abstract:
  The analysis of two-particle azimuthal correlation function in p+p and Au+Au
collisions at s(NN)**(1/2) 200 GeV/c is presented. The mean jet fragmentation
transverse momentum <|mjTy|> and mean parton transverse momentum <|kTy|> are
inferred from p+p collisions. The analysis of Au+Au data, where elliptic flow
is a dominant source of two-particles correlation is also presented. We derive
the upper limit on partonic azimuthal anisotropy based on jet-quenching in a
Glauber model. We show that some new mechanism, generating the azimuthal
anisotropy observed in final state, is needed.


title:
Experimental evidence for 56Ni-core breaking from the low-spin structure
  of the N=Z nucleus 58Cu

abstract:
  Low-spin states in the odd-odd N=Z nucleus 58Cu were investigated with the
58Ni(p,n gamma)58Cu fusion evaporation reaction at the FN-tandem accelerator in
Cologne. Seventeen low spin states below 3.6 MeV and 17 new transitions were
observed. Ten multipole mixing ratios and 17 gamma-branching ratios were
determined for the first time. New detailed spectroscopic information on the
2+,2 state, the Isobaric Analogue State (IAS) of the 2+,1,T=1 state of 58Ni,
makes 58Cu the heaviest odd-odd N=Z nucleus with known B(E2;2+,T=1 --> 0+,T=1)
value. The 4^+ state at 2.751 MeV, observed here for the first time, is
identified as the IAS of the 4+,1,T=1 state in 58Ni. The new data are compared
to full pf-shell model calculations with the novel GXPF1 residual interaction
and to calculations within a pf5/2 configurational space with a residual
surface delta interaction. The role of the 56Ni core excitations for the
low-spin structure in 58Cu is discussed.


title: Charged Pion Production in 2 to 8 AGeV Central Au+Au Collisions

abstract:
  Momentum spectra of charged pions over nearly full rapidity coverage from
target to beam rapidity have been measured in the 0-5% most central Au+Au
collisions in the beam energy range from 2 to 8 AGeV by the E895 Experiment.
Using a thermal parameterization to fit the transverse mass spectra, rapidity
density distributions are extracted. The observed spectra are compared with
predictions from the RQMD v2.3 cascade model and also to a thermal model
including longitudinal flow. The total 4$\pi$ yields of the charged pions are
used to infer an initial state entropy produced in the collisions.


title:
$K^{*}(892)$ Production in Au+Au and pp Collisions at $\sqrt{s_{NN}}$ =
  200GeV at STAR

abstract:
  Mid-rapidity $K^{*0}(892)\to K\pi$ and $K^{*\pm}(892)\to K_S^0\pi^{\pm}$ are
measured in Au+Au and pp collisions at $\sqrt{s_{NN}}$=200GeV using the STAR
detector at RHIC. The $K^{*0}(892)$ mass is systematically shifted at small
transverse momentum for both Au+Au and pp collisions. The $K^{*0}(892)$
transverse mass spectra are measured in Au+Au collisions at different
centralities and in pp collisions. The $K^{*0}(892)$ mean transverse momentum
as a function of the collision centrality is compared to those of identified
$\pi^{-}$, $K^{-}$ and $\bar{p}$. The $K^{*}/K$ and $\phi/K^{*}$ ratios are
compared to measurements in A+A, $pp$, $\bar{p}p$, $e^{+}e^{-}$ collisions at
various colliding energies. The physics implications of these measurements are
also discussed.


title: Measurements of the electromagnetic form factor of the Proton at JLab

abstract:
  The ratio of the proton's elastic electromagnetic form factors
$G_{Ep}/G_{Mp}$ was obtained by measuring $P_{t}$ and $P_{\ell}$, the
transverse and longitudinal recoil proton polarization, respectively. For the
elastic reaction $\vec e p \to e\vec p$, $G_{Ep}/G_{Mp}$ is proportional to
$P_t/P_{\ell}$. The simultaneous measurement of $P_{t}$ and $P_{\ell}$ in a
polarimeter reduces systematic uncertainties. The results for the ratio
$G_{Ep}/G_{Mp}$ measured in Hall A so far show a systematic decrease with
increasing $Q^2$, indicating for the first time a definite difference in the
distribution of charge and magnetization in the proton. Together these
experiments cover the Q$^{2}$- range of 0.5 to 5.6 GeV$^{2}$. A new experiment
is currently being prepared, to extend the Q$^2$-range to 9 GeV$^2$ in Hall C.


title: Large Deformation Effects in the N = Z 44Ti Compound Nucleus

abstract:
  The N = Z 44Ti* nucleus has been populated in Fusion Evaporation process at
very high excitation energies and angular momenta using two entrance channels
with different mass-asymmetry. The deformation effects in the rapidly rotating
nuclei have been investigated through the energy distribution of the
alpha-particle combined to statistical-model calculations. In the case of
low-multiplicity events, the ratio between first particle emitted has been
measured and shows significant disagreement with the predictions of the
statistical-model. This may explain The large discrepancies observed in proton
energy spectra measured in previous experiments performed in the same mass
region.


title:
Transverse Momentum Spectra in Au+Au and d+Au Collisions at
  $\sqrt{s_{NN}}$=200 GeV and the Pseudorapidity Dependence of High p$_T$
  Suppression

abstract:
  We present spectra of charged hadrons from Au+Au and d+Au collisions at
$\sqrt{s_{NN}}=200$ GeV measured with the BRAHMS experiment at RHIC. The
spectra for different collision centralities are compared to spectra from ${\rm
p}+\bar{{\rm p}}$ collisions at the same energy scaled by the number of binary
collisions. The resulting ratios (nuclear modification factors) for central
Au+Au collisions at $\eta=0$ and $\eta=2.2$ evidence a strong suppression in
the high $p_{T}$ region ($>$2 GeV/c). In contrast, the d+Au nuclear
modification factor (at $\eta=0$) exhibits an enhancement of the high $p_T$
yields. These measurements indicate a high energy loss of the high $p_T$
particles in the medium created in the central Au+Au collisions. The lack of
suppression in d+Au collisions makes it unlikely that initial state effects can
explain the suppression in the central Au+Au collisions.


title:
Study of polarized-e polarized-p --> e-prime p pi0 in the Delta(1232)
  mass region using polarization asymmetries

abstract:
  Measurements of the angular distributions of target and double spin
asymmetries for the Delta(1232) in the exclusive channel (polarized-p
polarized-e,e-prime p)pi0 obtained at Jefferson Lab in the Q2 range from 0.5 to
1.5 gev2 are presented. Results of the asymmetries are compared with the
unitary isobar model, dynamical models, and the effective Lagrangian theory.
Sensitivity to the different models was observed, particularly in relation to
the description of background terms on which the target asymmetry depends
significantly.


title: Experimental study of pp eta dynamics in the pp --> ppeta reaction

abstract:
  A high statistics measurement of the pp --> ppeta reaction at an excess
energy of Q = 15.5 MeV has been performed at the internal beam facility
COSY-11. The stochastically cooled proton beam and the used detection system
allowed to determine the momenta of the outgoing protons with a precision of 4
MeV/c (sigma) in the center-of-mass frame. The determination of the
four-momentum vectors of both outgoing protons allowed to derive the complete
kinematical information of the ppeta-system.
  An unexpectedly large enhancement of the occupation density in the
kinematical regions of low proton-eta relative momenta is observed. A
description taking the proton-proton and the eta-proton interaction into
account and assuming an on-shell incoherent pairwise interaction among the
produced particles fails to explain this strong effect. Its understanding will
require a rigorous three-body approach to the ppeta system and the precise
determination of contributions from higher partial waves.
  We also present an invariant mass spectrum of the proton-proton system
determined at Q = 4.5 MeV. Interestingly, the enhancement at large relative
momenta between protons is visible also at such a small excess energy.
  In contrast to all other determined angular distributions, the orientation of
the emission plane with respect to the beam direction is extracted to be
anisotropic.


title:
Coherent Electromagnetic Processes in Ultra-Peripheral Heavy-Ion
  Collisions

abstract:
  We report measurements for coherent rho^0 production, AuAu->AuAu rho^0, and
coherent rho^0 and e^+e^- pair production accompanied by mutual nuclear Coulomb
excitation, AuAu->Au*Au* rho^0 and AuAuee, in ultra-peripheral relativistic
gold-gold collisions (UPC). We discuss transverse momentum, mass, and rapidity
distributions. The two photon-process of e^+e^- pair production is an important
probe of strong field QED because of the large coupling Z*alpha=0.6. At
sqrt{s}=200GeV, the e^+e^- production cross section agrees with lowest order
QED calculations. The cross sections for coherent rho^0 production at
sqrt{s}=130 and 200GeV are in agreement with theoretical predictions. The
calculations for both, coherent e^+e^- and rho^0 production treat nuclear
excitation as independent process.


title: Multiplicity fluctuations in Au+Au collisions at $\sqrt{s_{NN}}=130$ GeV

abstract:
  We present the results of charged particle fluctuations measurements in Au +
Au collisions at $\sqrt{s_{NN}}=130$ GeV using the STAR detector. Dynamical
fluctuations measurements are presented for inclusive charged particle
multiplicities as well as for identified charged pions, kaons, and protons. The
net charge dynamical fluctuations are found to be large and negative providing
clear evidence that positive and negative charged particle production is
correlated within the pseudorapidity range investigated. Correlations are
smaller than expected based on model-dependent predictions for a resonance gas
or a quark gluon gas which undergoes fast hadronization and freeze-out.
Qualitative agreement is found with comparable scaled p+p measurements and a
HIJING model calculation based on independent particle collisions, although a
small deviation from the 1/N scaling dependence expected from this model is
observed.


title:
An Apparatus to Control and Monitor the Para-D2 Concentration in a Solid
  Deuterium, Superthermal Source of Ultra-cold Neutrons

abstract:
  Controlling and measuring the concentration of para-D2 is an essential step
toward realizing solid deuterium as an intense ultra-cold neutron (UCN) source.
To this end, we implemented an experimental technique to convert para- to
ortho-deuterium molecules by flowing D2 gas through a cryogenic cell filled
with paramagnetic hydrous ferric oxide granules. This process efficiently
reduced the para-D2 concentration from 33.3% to 1.5%. Rotational Raman
spectroscopy was applied to measure the residual para-D2 contamination to
better than 2 parts in 10^3, and the hydrogen contamination to 1 part in 10^3.
We also contrast our optical technique to conventional thermal conductivity
measurements of the para-D2 concentration, reporting some of the relevant
strengths and weaknesses of our implementation of each technique.


title: Thermal properties and radiative strengths in 160,161,162Dy

abstract:
  The level densities and radiative strength functions (RSFs) in 160,161Dy have
been extracted using the (3He,alpha gamma) and (3He,3He' gamma) reactions,
respectively. The data are compared to previous measurements on 161,162Dy. The
energy distribution in the canonical ensemble is discussed with respect to the
nucleon Cooper pair breaking process. The gross properties of the RSF are
described by the giant electric dipole resonance. The RSF at low gamma-ray
energies is discussed with respect to temperature dependency. Resonance
parameters of a soft dipole resonance at Egamma = 3 MeV are deduced.


title:
Single Identified Hadron Spectra from sqrt(s_NN)=130 GeV Au+Au
  Collisions

abstract:
  Transverse momentum spectra and yields of hadrons are measured by the PHENIX
collaboration in Au + Au collisions at sqrt(s_NN) = 130 GeV at the Relativistic
Heavy Ion Collider (RHIC). The time-of-flight resolution allows identification
of pions to transverse momenta of 2 GeV/c and protons and antiprotons to 4
GeV/c. The yield of pions rises approximately linearly with the number of
nucleons participating in the collision, while the number of kaons, protons,
and antiprotons increases more rapidly. The shape of the momentum distribution
changes between peripheral and central collisions. Simultaneous analysis of all
the p_T spectra indicates radial collective expansion, consistent with
predictions of hydrodynamic models. Hydrodynamic analysis of the spectra shows
that the expansion velocity increases with collision centrality and collision
energy. This expansion boosts the particle momenta, causing the yield from soft
processes to exceed that for hard to large transverse momentum, perhaps as
large as 3 GeV/c.


title: Analysis of laboratory nucleosynthesis products

abstract:
  We present the results of the experimental study on synthesis of a wide range
of isotopes in a superdense plasma. The initial conditions necessary for plasma
bunch formation were provided by specially organized coherent impact on a solid
target with a total energy up to 1 kJ. More than 4000 shots were performed with
various targets made of light, medium, and heavy elements. Subsequent analysis
of the products of the target explosion reveals the presence of a wide range of
elements absent in the initial materials. Elements with nuclei three and more
times heavier than the nucleus of the target main element are detected in the
products. The isotopic composition of the produced elements significantly
differs from the natural one. The presence of unknown superheavy elements at
the border of the periodic table and beyond it was detected by several
different spectroscopic methods of elemental and isotopic analyzes.


title: Low-Q scaling, duality, and the EMC effect

abstract:
  High energy lepton scattering has been the primary tool for mapping out the
quark distributions of nucleons and nuclei. Data on the proton and deuteron
have shown that there is a fundamental connection between the low and high
energy regimes, referred to as quark-hadron duality. We present the results of
similar studies to more carefully examine scaling, duality, and in particular
the EMC effect in nuclei. We extract nuclear modifications to the structure
function in the resonance region, and for the first time demonstrate that
nuclear effects in the resonance region are identical to those measured in deep
inelastic scattering. With the improved precision of the data at large $x$, we
for the first time observe that the large-x crossover point appears to occur at
lower $x$ values in carbon than in iron or gold.


title:
Lambda(1520) and Sigma(1385) resonance production in Au+Au and p+p
  collisions at RHIC (sqrt{s_NN}=200 GeV)

abstract:
  The production of Lambda(1520) in p+p and Au+Au collisions provided by the
RHIC at sqrt{s_NN}=200 GeV are investigated using the STAR detector. A
preliminary Sigma(1385) signal is also shown. Models predict that a late
rescattering phase in ultra-relativistic heavy ion collisions should lower the
measured yields of these resonances. This reduction is presently confirmed
through the Lambda(1520)/Lambda ratio which has been calculated for p+p
collisions and compared with Au+Au collisions.


title: Resonances at RHIC

abstract:
  In this report, we discuss the measurement of the hadronic decay modes of
resonances in relativistic heavy-ion collisions, emphasizing on RHIC results.
The study of resonances can provide: (1) the yield and spectra of more
particles with different properties to study whether the system is in thermal
equilibrium; (2) an independent probe of the time evolution of the source from
chemical to kinetic freeze-out and detailed information on hadronic interaction
at later stage; (3) the study of medium effects at late stages of the
collisions; (4) a measurement of flavor and baryon/meson dependence of particle
production at intermediate $p_{T}$ ($>2$ GeV/$c$).


title: STAR Integrated Tracker

abstract:
  We present the design and performance analysis of a new integrated track
reconstruction code developed for the STAR experiment at RHIC. The code is
meant to replace multiple previous tracking codes written in FORTRAN many years
ago, and to readily enable the integration of new and varied detector
components. The new tracker is written from the ground up in C++ using a strong
object-oriented model. Key features include an abstract geometry model for
representation of detector components, a flexible track representation model, a
built-in KALMAN filter for track parameter determination, and a powerful object
factory model for fast handling of numerous small objects, such as hits and
tracks. The new tracker will be deployed and used for analysis of data aquired
during the RHIC year 3 run of the STAR experiment.


title:
Upper limit for the cross section of the overlapping scalar resonances
  f0(980) and a0(980) produced in proton-proton collisions in the range of the
  reaction threshold

abstract:
  Utilizing a missing mass technique we investigate the pp --> ppX reaction
scanning beam energies in the range permitting to create a mass close to that
of the f0(980) and a0(980) scalar resonances, but still below the K^+K^-
threshold where they decay dominantly into pi pi and pi eta mesons,
respectively. Prior to the data analysis we introduce a notion of the close to
threshold total cross section for broad resonances.
  We estimated for the overlapping mesons a0 and f0 the total cross section to
be smaller than 430 nb at excess energy of Q = 5 MeV.
  The experiment have been performed at the Cooler Synchrotron COSY using the
COSY-11 facility.


title:
First evidence for different freeze-out conditions for kaons and
  antikaons observed in heavy-ion collisions

abstract:
  Differential production cross sections of K- and K+ mesons have been measured
in Ni+Ni and Au+Au collisions at a beam energy of 1.5 AGeV. The K-/K+ ratio is
found to be nearly constant as a function of the collision centrality and
system size. The spectral slopes and the polar emission pattern differ for K-
and K+ mesons. These observations indicate that K+ mesons decouple earlier from
the fireball than K- mesons.


title: K+ and K- production in heavy-ion collisions at SIS-energies

abstract:
  The production and the propagation of K+ and of K- mesons in heavy-ion
collisions at beam energies of 1 to 2 AGeV have systematically been
investigated with the Kaon Spectrometer KaoS at the SIS at the GSI. The ratio
of the K+ production excitation function for Au+Au and for C+C reactions
increases with decreasing beam energy, which is expected for a soft nuclear
equation-of-state. At 1.5 AGeV a comprehensive study of the K+ and of the K-
emission as a function of the size of the collision system, of the collision
centrality, of the kaon energy, and of the polar emission angle has been
performed. The K-/K+ ratio is found to be nearly constant as a function of the
collision centrality. The spectral slopes and the polar emission patterns are
different for K- and for K+. These observations indicate that K+ mesons
decouple earlier from the reaction zone than K- mesons.


title: One-neutron removal reactions on light neutron-rich nuclei

abstract:
  A study of high energy (43--68 MeV/nucleon) one-neutron removal reactions on
a range of neutron-rich psd-shell nuclei (Z = 5--9, A = 12--25) has been
undertaken. The inclusive longitudinal and transverse momentum distributions
for the core fragments, together with the cross sections have been measured for
breakup on a carbon target. Momentum distributions for reactions on tantalum
were also measured for a subset of nuclei. An extended version of the Glauber
model incorporating second order noneikonal corrections to the JLM
parametrisation of the optical potential has been used to describe the nuclear
breakup, whilst the Coulomb dissociation is treated within first order
perturbation theory. The projectile structure has been taken into account via
shell model calculations employing the psd-interaction of Warburton and Brown.
Both the longitudinal and transverse momentum distributions, together with the
integrated cross sections were well reproduced by these calculations and
spin-parity assignments are thus proposed for $^{15}$B, $^{17}$C, $^{19-21}$N,
$^{21,23}$O, $^{23-25}$F. In addition to the large spectroscopic amplitudes for
the $\nu2$s$_{1/2}$ intruder configuration in the N=9 isotones,$^{14}$B and
$^{15}$C, significant $\nu2$s$_{1/2}^2$ admixtures appear to occur in the
ground state of the neighbouring N=10 nuclei $^{15}$B and $^{16}$C. Similarly,
crossing the N=14 subshell, the occupation of the $\nu2$s$_{1/2}$ orbital is
observed for $^{23}$O, $^{24,25}$F. Analysis of the longitudinal and transverse
momentum distributions reveals that both carry spectroscopic information, often
of a complementary nature. The general utility of high energy nucleon removal
reactions as a spectroscopic tool is also examined.


title: Muon capture by 3He nuclei followed by proton and deuteron production

abstract:
  The paper describes an experiment aimed at studying muon capture by
${}^{3}\mathrm{He}$ nuclei in pure ${}^{3}\mathrm{He}$ and $\mathrm{D}_2 +
{}^{3}\mathrm{He}$ mixtures at various densities. Energy distributions of
protons and deuterons produced via $\mu^-+{}^{3}\mathrm{He}\to p+n+n + \nu_{\mu
}$ and $\mu^-+{}^{3} \mathrm{He} \to d+n + \nu_{\mu}$ are measured for the
energy intervals $10 - 49$ MeV and $13 - 31$ MeV, respectively. Muon capture
rates, $\lambda_\mathrm{cap}^p (\Delta E_p)$ and $\lambda_\mathrm{cap}^d
(\Delta E_d)$ are obtained using two different analysis methods. The
least--squares methods gives $\lambda_\mathrm{cap}^p = (36.7\pm 1.2) {s}^{-
1}$, $\lambda_\mathrm{cap}^d = (21.3 \pm 1.6) {s}^{- 1}$. The Bayes theorem
gives $\lambda_\mathrm{cap}^p = (36.8 \pm 0.8) {s}^{- 1}$,
$\lambda_\mathrm{cap}^d = (21.9 \pm 0.6) {s}^{- 1}$. The experimental
differential capture rates, $d\lambda_\mathrm{cap}^p (E_p) / dE_p $ and $
d\lambda_\mathrm{cap}^d (E_d) / dE_d$, are compared with theoretical
calculations performed using the plane--wave impulse approximation (PWIA) with
the realistic NN interaction Bonn B potential. Extrapolation to the full energy
range yields total proton and deuteron capture rates in good agreement with
former results.


title:
Elements Discrimination in the Study of Super-Heavy Elements using an
  Ionization Chamber

abstract:
  Dedicated ionization chamber was built and installed to measure the energy
loss of very heavy nuclei at 2.7 MeV/u produced in fusion reactions in inverse
kinematics (beam of 208Pb). After going through the ionization chamber,
products of reactions on 12C, 18O targets are implanted in a Si detector. Their
identification through their alpha decay chain is ambiguous when their
half-life is short. After calibration with Pb and Th nuclei, the ionization
chamber signal allowed us to resolve these ambiguities. In the search for rare
super-heavy nuclei produced in fusion reactions in inverse or symmetric
kinematics, such a chamber will provide direct information on the nuclear
charge of each implanted nucleus.


title:
Identified Charged Particle Spectra and Yields in Au+Au Collisions at
  sqrt(s_NN) = 200 GeV

abstract:
  The centrality dependence of transverse momentum distributions and yields for
pi^+/-, K^+/-, p and p^bar in Au+Au collisions at sqrt(s_NN) = 200 GeV at
mid-rapidity are measured by the PHENIX experiment at RHIC. We observe a clear
particle mass dependence of the shapes of transverse momentum spectra in
central collisions below ~ 2 GeV/c in p_T. Both mean transverse momenta and
particle yields per participant pair increase from peripheral to mid-central
and saturate at the most central collisions for all particle species. We also
measure particle ratios of pi^-/pi^+, K^-/K^+, p^bar/p, K/pi, p/pi and p^bar/pi
as a function of p_T and collision centrality. The ratios of equal mass
particle yields are independent of p_T and centrality within the experimental
uncertainties. In central collisions at intermediate transverse momenta ~
1.5-4.5 GeV/c, proton and anti-proton yields constitute a significant fraction
of the charged hadron production and show a scaling behavior different from
that of pions.


title:
rho^0 Production and Possible Modification in Au+Au and p+p Collisions
  at sqrt(s_NN) = 200 GeV

abstract:
  We report results on rho(770)^0 -> pi+pi- production at midrapidity in p+p
and peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV. This is the first
direct measurement of rho(770)^0 -> pi+pi- in heavy-ion collisions. The
measured rho^0 peak in the invariant mass distribution is shifted by ~40
MeV/c^2 in minimum bias p+p interactions and ~70 MeV/c^2 in peripheral Au+Au
collisions. The rho^0 mass shift is dependent on transverse momentum and
multiplicity. The modification of the rho^0 meson mass, width, and shape due to
phase space and dynamical effects are discussed.


title:
Multi-Strange Baryon Production in Au-Au collisions at sqrt(s_NN) = 130
  GeV

abstract:
  The transverse mass spectra and mid-rapidity yields for $\Xi$s and $\Omega$s
plus their anti-particles are presented. The 10% most central collision yields
suggest that the amount of multi-strange particles produced per produced
charged hadron increases from SPS to RHIC energies. A hydrodynamically inspired
model fit to the spectra, which assumes a thermalized source, seems to indicate
that these multi-strange particles experience a significant transverse flow
effect, but are emitted when the system is hotter and the flow is smaller than
values obtained from a combined fit to $\pi$, K, p and $\Lambda$s.


title:
Pion-Kaon correlations in central Au+Au collisions at $\sqrt{s_{NN}} =
  130$ GeV

abstract:
  Pion-kaon correlation functions are constructed from central Au+Au data taken
at $\sqrt{s_{NN}} = 130$ GeV. The results suggest that pions and kaons are not
emitted at the same average space-time point. Space-momentum correlations, i.e.
transverse flow, lead to a space-time emission asymmetry of pions and kaons
that is consistent with the data. This result provides new independent evidence
that the system created at RHIC undergoes a collective transverse expansion.


title: Space-time analysis of reaction at RHIC

abstract:
  Space-time information about the Au-Au collisions produced at RHIC are key
tools to understand the evolution of the system and especially assess the
presence of collective behaviors. Using a parameterization of the system's
final state relying on collective expansion, we show that pion source radii can
be tied together with transverse mass spectra and elliptic flow within the same
framework. The consistency between these different measures provide a solid
ground to understand the characteristics of collective flow and especially the
possible peculiar behavior of particles such as Xi, Omega or phi. The validity
of the short time scales that are extracted from fits to the pion source size
is also addressed. The wealth of new data that will soon be available from
Au-Au collisions at sqrt{s_{NN}} = 200 GeV, will provide a stringet test of the
space-time analysis framework developped in these proceedings.


title:
High Precision Measurement of the Superallowed 0^+ to 0^+ Beta Decay of
  ^{22}Mg

abstract:
  The half-life, 3.8755(12) s, and superallowed branching ratio, 0.5315(12),
for ^{22}Mg beta-decay have been measured with high precision. The latter
depended on gamma-ray intensities being measured with an HPGe detector
calibrated for relative efficiencies to an unprecedented 0.15%. Previous
precise measurements of 0^+ to 0^+ transitions have been restricted to the nine
that populate stable daughter nuclei. No more such cases exist, and any
improvement in a critical CKM unitarity test must depend on precise
measurements of more exotic nuclei. With this branching-ratio measurement, we
show those to be possible for T_z = -1 parents. We obtain a corrected Ft-value
of 3071(9) s, in good agreement with expectations.


title: Helium Clustering in Neutron-Rich Be Isotopes

abstract:
  Measurements of the helium-cluster breakup and neutron removal cross sections
for neutron-rich Be isotopes A=10-12,14 are presented. These have been studied
in the 30 to 42 MeV/u energy range where reaction measurements are proposed to
be sensitive to the cluster content of the ground-state wave-function. These
measurements provide a comprehensive survey of the decay processes of the Be
isotopes by which the valence neutrons are removed revealing the underlying
alpha-alpha core-cluster structure. The measurements indicate that clustering
in the Be isotopes remains important up to the drip-line nucleus 14^Be and that
the dominant helium-cluster structure in the neutron-rich Be isotopes
corresponds to alpha-Xn-alpha.


title: Precise measurement of the ^7Be(p,gamma)^8B S-factor

abstract:
  We present new measurements of the ^7Be(p,gamma)^8B cross section from
\bar{E}_{cm} = 116 to 2460 keV, that incorporate several improvements over our
previously published experiment, also discussed here. Our new measurements lead
to S_{17}(0) = 22.1 +- 0.6(expt) +- 0.6(theor) eV b based on data from
\bar{E}_{cm} = 116 to 362 keV, where the central value is based on the theory
of Descouvemont and Baye. The theoretical error estimate is based on the fit of
12 different theories to our low energy data. We compare our results to other
S_{17}(0) values extracted from both direct (^7Be(p,gamma)^8B) and indirect
(Coulomb dissociation and heavy-ion reaction) measurements, and show that the
results of these 3 types of experiments are not mutually compatible. We
recommend a "best" value, S_{17}(0) = 21.4 +- 0.5(expt) +- 0.6(theor) eV b,
based on the mean of all modern direct measurements below the 1^+ resonance. We
also present S-factors at 20 keV which is near the center of the Gamow window:
the result of our measurements is S_{17}(20) = 21.4 +- 0.6(expt) +- 0.6(theor)
eV b, and the recommended value is S_{17}(20) = 20.7 +- 0.5(expt) +- 0.6(theor)
eV b.


title: Particle production at RHIC energies

abstract:
  This paper presents recent results from the BRAHMS experiment at RHIC;
including results on particle production in rapidity space extending from y=0
to y ~ 3 and on the transverse momentum distribution of fully identified
charged particles. These results were obtained from the 5% most central Au-Au
collisions recorded during RHIC Run-2 at sqrt{s_{NN}} = 200 GeV.


title: Does the Sigma(1580)3/2- resonance exist?

abstract:
  Precise new data for the reaction $K^- p \to \pi^0 \Lambda$ are presented in
the c.m. energy range 1565 to 1600 MeV. Our analysis of these data sheds new
light on claims for the $\Sigma(1580){3/2}^-$ resonance, which (if it exists
with the specified quantum numbers) must be an exotic baryon because of its
very low mass. Our results show no evidence for this state.


title:
High-p_T Charged Hadron Suppression in Au+Au Collisions at sqrt(s_NN) =
  200 GeV

abstract:
  The PHENIX experiment at RHIC has measured charged hadron yields at
mid-rapidity over a wide range of transverse momentum (0.5 < p_T < 10 GeV/c) in
Au+Au collisions at sqrt(s_NN)=200 GeV. The data are compared to pi^zero
measurements from the same experiment. For both charged hadrons and neutral
pions, the yields per nucleon-nucleon collision are significantly suppressed in
central compared to peripheral and nucleon-nucleon collisions. The suppression
sets in gradually and increases with increasing centrality of the collisions.
Above 4-5 GeV/c in p_T, a constant and almost identical suppression of charged
hadrons and pi^zeroes is observed. The p_T spectra are compared to published
spectra from Au+Au at sqrt(s_NN)=130 in terms of x_t scaling. Central and
peripheral pi^zero as well as peripheral charged spectra exhibit the same x_t
scaling as observed in p+p data.


title:
Measurements of GEn/GMn from the ^2H(vec{e},e'vec{n})^1H Reaction to
  Q^2=1.45 (GeV/c)^2

abstract:
  We report new measurements of the ratio of the electric form factor to the
magnetic form factor of the neutron, GEn/GMn, obtained via recoil polarimetry
from the quasielastic ^2H(vec{e},e'vec{n})^1H reaction at Q^2 values of 0.45,
1.13, and 1.45 (GeV/c)^2 with relative statistical uncertainties of 7.6 and
8.4% at the two higher Q^2 points, which were not reached previously via
polarization measurements. Scale and systematic uncertainties are small.


title:
Particle decay branching ratios for states of astrophysical importance
  in 19Ne

abstract:
  We have measured proton and alpha-particle branching ratios of excited states
in 19Ne formed using the 19F(3He,t) reaction at a beam energy of 25 MeV. These
ratios have a large impact on the astrophysical reaction rates of
15O(alpha,gamma), 18F(p,gamma) and 18F(p,alpha), which are of interest in
understanding energy generation in x-ray bursts and in interpreting anticipated
gamma-ray observations of novae. We detect decay protons and alpha-particles
using a silicon detector array in coincidence with tritons measured in the
focal plane detector of our Enge split-pole spectrograph. The silicon array
consists of five strip detectors of the type used in the Louvain-Edinburgh
Detector Array, subtending angles from 130 degrees to 165 degrees with
approximately 14% lab efficiency. The correlation angular distributions give
additional confidence in some prior spin-parity assignments that were based on
gamma branchings. We measure Gamma_p/Gamma=0.387+-0.016 for the 665 keV proton
resonance, which agrees well with the direct measurement of Bardayan et al.


title:
Backward electroproduction of pi0 mesons on protons in the region of
  nucleon resonances at four momentum transfer squared Q**2 = 1.0 GeV**2

abstract:
  Exclusive electroproduction of pi0 mesons on protons in the backward
hemisphere has been studied at Q**2 = 1.0 GeV**2 by detecting protons in the
forward direction in coincidence with scattered electrons from the 4 GeV
electron beam in Jefferson Lab's Hall A. The data span the range of the total
(gamma* p) center-of-mass energy W from the pion production threshold to W =
2.0 GeV. The differential cross sections sigma_T+epsilon*sigma_L, sigma_TL, and
sigma_TT were separated from the azimuthal distribution and are presented
together with the MAID and SAID parametrizations.


title: Proton-decaying states in 22Mg and the nucleosynthesis of 22Na in novae

abstract:
  Populating states in 22Mg via the (p,t) reaction in inverse kinematics with a
55 MeV/nucleon 24Mg beam, we have measured the proton-decay branching ratios of
the levels at 5.96 MeV and 6.05 MeV and obtained an experimental upper limit on
the branching ratio of the 5.71 MeV state. On the basis of the present and
previous measurements, we assign spins and parities to the 5.96 MeV and 6.05
MeV states. We combine our branching ratios with independent measurements of
the lifetimes of these states or their 22Ne analogs to compute the resonance
strengths and thereby the astrophysical rate of the 21Na(p,g)22Mg reaction. We
perform hydrodynamic calculations of nova outbursts with this new rate and
analyze its impact on 22Na yields.


title:
Precision Measurement of the Neutron Spin Asymmetry $A_1^n$ and
  Spin-Flavor Decomposition in the Valence Quark Region

abstract:
  We have measured the neutron spin asymmetry $A_1^n$ with high precision at
three kinematics in the deep inelastic region at $x=0.33$, 0.47 and 0.60, and
$Q^2=2.7$, 3.5 and 4.8 (GeV/c)$^2$, respectively. Our results unambiguously
show, for the first time, that $A_1^n$ crosses zero around $x=0.47$ and becomes
significantly positive at $x=0.60$. Combined with the world proton data,
polarized quark distributions were extracted. Our results, in general, agree
with relativistic constituent quark models and with perturbative quantum
chromodynamics (pQCD) analyses based on the earlier data. However they deviate
from pQCD predictions based on hadron helicity conservation.


title:
Systematic investigation of the elastic proton-deuteron differential
  cross section at intermediate energies

abstract:
  To investigate the importance of three-nucleon forces (3NF) systematically
over a broad range of intermediate energies, the differential cross sections of
elastic proton-deuteron scattering have been measured at proton bombarding
energies of 108, 120, 135, 150, 170 and 190 MeV at center-of-mass angles
between $30^\circ$ and $170^\circ$. Comparisons with Faddeev calculations show
unambiguously the shortcomings of calculations employing only two-body forces
and the necessity of including 3NF. They also show the limitations of the
latest few-nucleon calculations at backward angles, especially at higher beam
energies. Some of these discrepancies could be partially due to relativistic
effects. Data at lowest energy are also compared with a recent calculation
based on \chipt.


title: Two-Nucleon Momentum Distributions Measured in 3He(e,e'pp)n

abstract:
  We have measured the 3He(e,e'pp)n reaction at 2.2 GeV over a wide kinematic
range. The kinetic energy distribution for `fast' nucleons (p > 250 MeV/c)
peaks where two nucleons each have 20% or less, and the third nucleon has most
of the transferred energy. These fast pp and pn pairs are back-to-back with
little momentum along the three-momentum transfer, indicating that they are
spectators. Experimental and theoretical evidence indicates that we have
measured distorted two-nucleon momentum distributions by striking the third
nucleon and detecting the spectator correlated pair.


title:
Is simultaneous $y$ and $\xi$--scaling in the quasi-elastic region
  accidental?

abstract:
  We study the $y$ and $\xi$--scaling of the nuclear response at large momentum
transfer in order to understand how scaling based on very different
descriptions of the elementary interaction can occur simultaneously. We find
that the approximate validity of $\xi$-scaling at low energy loss arises from
the coincidental behavior of the quasielastic and deep inelastic cross
sections.


title: Reference Design Project Book: NUSEL-Homestake

abstract:
  This submission includes the overview, science timeline, reference design,
WBS, and mine status sections of the Homestake collaboration's Reference Design
Project Book. The Project Book describes the specific plan for converting the
Homestake Gold Mine into a facility for physics, earth science, and
engineering. The proposed developments on the 7400- and 4850-ft levels are
presented, along with the plans for adapting Homestake's existing
infrastructure for science. The plan differs substantially from the conceptual
design for the National Underground Science and Engineering Laboratory proposed
in June, 2001.


title:
Particle Composition at High p_T in Au+Au Collisions at sqrt(s_NN) = 200
  GeV

abstract:
  We report the recent results of proton and anti-proton yields as a function
of centrality and p_T in Au+Au collisions at sqrt(s_NN) = 200 GeV, measured by
the PHENIX experiment at RHIC. In central collisions at intermediate transverse
momenta (1.5 < p_T < 4.5 GeV/c) a significant fraction of all produced
particles is protons and anti-protons. They show a different scaling behavior
from that of pions. The pbar/pi and p/pi ratios are enhanced compared to
peripheral Au+Au, p+p and e+e- collisions. This enhancement is limited to p_T <
5 GeV/c as deduced from the ratio of charged hadrons to pi^0 measured in the
range 1.5 < p_T < 9 GeV/c.


title:
Cluster structure of 13C probed via the 7Li(9Be,13C*->9Be+alpha)
  reaction

abstract:
  A study of the 7Li(9Be,4He9Be)3H reaction at E{beam}=70 MeV has been
performed using resonant particle spectroscopy techniques and provides a
measurement of alpha-decaying states in 13C. Excited states are observed at
12.0, 13.4, 14.1, 14.6, 15.2, 16.8, 17.9, 18.7, 21.3 and 23.9 MeV. This study
provides the first measurement of the three highest energy states. Angular
distribution measurements have been performed and have been employed to
indicate the transferred angular momentum for the populated states. These data
are compared with recent speculations of the presence of chain-like structures
in 13C.


title: Physics Chapter: NUSEL-Homestake Science Book

abstract:
  The physics chapter of the NUSEL-Homestake Reference Design Science Book
describes the physics motivation for building a deep underground science and
engineering laboratory. It includes discussions of outstanding problems in
neutrino physics and astrophysics (including long-baseline probes of theta-13
and CP violation, solar and atmospheric neutrinos, and double beta decay), dark
matter, nucleon decay, nuclear astrophysics with underground detectors, and
neutrinos as a probe of supernovae.


title:
Conference on the Intersections of Particle and Nuclear Physics 2003:
  Relativistic Heavy Ion Parallel Session Summary

abstract:
  The Relativistic Heavy Ion Collider (RHIC) came online in 2000, and the last
three years have provided a wealth of new experimental data and theoretical
work in this new energy frontier for nuclear physics. The transition from
quarks and gluons bound into hadrons to a deconfined quark-gluon plasma is
expected to occur at these energies, and the effort to understand the time
evolution of these complex systems has been significantly advanced. The heavy
ion parallel session talks from the Conference on the Intersections of Particle
and Nuclear Physics (CIPANP) 2003 are posted at:
http://www.phenix.bnl.gov/WWW/publish/nagle/CIPANP/. We provide a brief summary
of these sessions here.


title: Elliptic Flow From Au+Au Collisions at 200 GeV

abstract:
  This paper presents results of elliptic flow measurements at moderate high
transverse momentum in Au+Au collisions using the STAR detector at RHIC.
Sizable $v_{2}$ is found up to 7 GeV/c in transverse momentum. Non-flow effects
are discussed comparing correlations in p+p collisions and Au+Au collisions.
$v_{2}$ from two-, four- and six-particle cumulant are shown and discussed.


title:
Measurement of the Electric Form Factor of the Neutron at Q^2=0.5 and
  1.0 (GeV/c)^2

abstract:
  The electric form factor of the neutron was determined from measurements of
the \vec{d}(\vec{e},e' n)p reaction for quasielastic kinematics. Polarized
electrons were scattered off a polarized deuterated ammonia target in which the
deuteron polarization was perpendicular to the momentum transfer. The scattered
electrons were detected in a magnetic spectrometer in coincidence with neutrons
in a large solid angle detector. We find G_E^n = 0.0526 +/- 0.0033 (stat) +/-
0.0026 (sys) and 0.0454 +/- 0.0054 +/- 0.0037 at Q^2 = 0.5 and 1.0 (GeV/c)^2,
respectively.


title: The TOFp/pVPD Time of Flight System for STAR

abstract:
  A time-of-flight system was constructed for the STAR Experiment for the
direct identification of hadrons produced in 197Au+197Au collisions at RHIC.
The system consists of two separate detector subsystems, one called the pVPD
(the "start" detector) and the other called the TOFp tray (the "stop"
detector). Each detector is based on conventional scintillator/phototube
technology and includes custom high-performance front-end electronics and a
common CAMAC-based digitization and read-out. The design of the system and its
performance during the 2001 RHIC run will be described. The start resolution
attained by the pVPD was 24 ps, implying a pVPD single-detector resolution of
58 ps. The total time resolution of the system averaged over all detector
channels was 87 ps, allowing direct pi/K/p discrimination for momenta up to 1.8
GeV/c, and direct (pi+K)/p discrimination up to 3 GeV/c.


title: Jets and high $p_T$ hadrons in dense matter: recent results from STAR

abstract:
  We review recent measurements of high transverse momentum (high $p_T$) hadron
production in nuclear collisions by the STAR Collaboration at RHIC. The
previously observed suppression in central Au+Au collisions has been extended
to much higher $p_T$. New measurements from d+Au collisions are presented which
help disentangle the mechanisms responsible for the suppression. Inclusive
single hadron spectra are enhanced in d+Au relative to p+p, while two-particle
azimuthal distributions are observed to be similar in p+p, d+Au and peripheral
Au+Au collisions. The large suppression of inclusive hadron production and
absence of the away-side jet-like correlations in central Au+Au collisions are
shown to be due to interactions of the jets with the very dense medium produced
in these collisions.


title:
Cross sections relevant to gamma-ray line emission in solar flares:
  $^3$He-induced reactions on $^{16}$O nuclei

abstract:
  Gamma-ray production cross sections have been measured for gamma-ray lines
copiously emitted in the $^3$He bombardment of $^{16}$O nuclei: the 937, 1042
and 1081 keV lines of $^{18}$F and the 1887 keV line of $^{18}$Ne. Four Ge
detectors with BGO shielding for Compton suppression were used to measure the
angular distributions of the gamma-rays. The excitation functions have been
obtained for $^3$He bombarding energies from 3.7 to 36 MeV. Total cross
sections are tabulated for calculations relevant to gamma-ray astronomy. The
importance of these lines as diagnosis for the presence and properties of
accelerated $^3$He in solar flares is discussed in light of the measured cross
sections.


title:
Measurement of gamma p --> K+ Lambda and gamma p --> K+ Sigma0 at photon
  energies up to 2.6 GeV

abstract:
  The reactions gamma p --> K+ Lambda and gamma p --> K+ Sigma0 were measured
in the energy range from threshold up to a photon energy of 2.6 GeV. The data
were taken with the SAPHIR detector at the electron stretcher facility, ELSA.
Results on cross sections and hyperon polarizations are presented as a function
of kaon production angle and photon energy. The total cross section for Lambda
production rises steeply with energy close to threshold, whereas the Sigma0
cross section rises slowly to a maximum at about E_gamma = 1.45 GeV. Cross
sections together with their angular decompositions into Legendre polynomials
suggest contributions from resonance production for both reactions. In general,
the induced polarization of Lambda has negative values in the kaon forward
direction and positive values in the backward direction. The magnitude varies
with energy. The polarization of Sigma0 follows a similar angular and energy
dependence as that of Lambda, but with opposite sign.


title: Medium Modification of the Proton Form Factor

abstract:
  I argue that the double ratio of proton-recoil polarization-transfer
coefficients, P'_x and P'_z, of the quasielastic 4He(e,e'p)3H reaction with
respect to the elastic 1H(e,e'p) reaction is sensitive to possible medium
modifications of the proton form factor in 4He. Recent measurements at both
Mainz and Jefferson Lab of this double ratio at four-momentum transfers squared
between between 0.4 GeV2 and 2.6 GeV2 are discussed. I show that the data
challenge state-of-the-art conventional meson-nucleon calculations, as these
are unable to describe the results. The data hint at the need to include medium
modifications of the proton form factor, as predicted by a quark-meson-coupling
model, in the calculations. A recently approved follow-up experiment at a Q2 of
0.8 GeV2 and 1.3 GeV2 with unprecedented precision will provide one of the most
stringent tests of the applicability of various calculations.


title:
Reaction Dynamics and Multifragmentation in Fermi Energy Heavy Ion
  Reactions

abstract:
  The reaction systems, 64Zn + 58Ni, 64Zn + 92Mo, 64Zn + 197Au, at 26A, 35A and
47A MeV, have been studied both in experiments with a 4$\pi$ detector array,
NIMROD, and with Antisymmetrized Molecular Dynamics model calculations
employing effective interactions corresponding to soft and stiff equations of
state (EOS). Direct experimental observables, such as multiplicity
distributions, charge distributions, energy spectra and velocity spectra, have
been compared in detail with those of the calculations and a reasonable
agreement is obtained. The velocity distributions of $\alpha$ particles and
fragments with Z >= 3 show distinct differences in calculations with the soft
EOS and the stiff EOS. The velocity distributions of $\alpha$ particle and
Intermediate Mass Fragments (IMF's) are best described by the stiff EOS.
Neither of the above direct observables nor the strength of the elliptic flow
are sensitive to changes in the in-medium nucleon-nucleon (NN) cross sections.
A detailed analysis of the central collision events calculated with the stiff
EOS revealed that multifragmentation with cold fragment emission is a common
feature predicted for all reactions studied here. A possible multifragmentation
scenario is presented; after the preequilibrium emission ceases in the
composite system, cold light fragments are formed in a hotter gas of nucleons
and stay cold until the composite system underdoes multifragmentation. For
reaction with 197Au at 47A MeV a significant radial expansion takes place. For
reactions with 58Ni and 92Mo at 47A MeV semi-transparency becomes prominent.
The differing reaction dynamics drastically change the kinematic
characteristics of emitted fragments. This scenario gives consistent
explanations for many existing experimental results in the Fermi energy domain.


title: Lambda(1520) production at SPS and RHIC energies

abstract:
  The recent preliminary results from central Au+Au collisions at $\sqrt{s_{\rm
NN}} = $ 130 GeV from the STAR experiment at RHIC are presented and discussed
along with the results on the $\Lambda$(1520) production in cental Pb+Pb and
p+p collisions at $\sqrt{s} = $ 17 GeV from the NA49 experiment at the SPS. The
$\Lambda$(1520) is measured with the invariant mass reconstruction of the decay
products in the hadronic channel (K$^{-}$, p). The mean $\Lambda$(1520)
multiplicity scaled by the number of participants decreases from p+p to Pb+Pb
collisions at the same energy of $\sqrt{s}$ = 17 GeV. An upper limit estimate
of the multiplicity from the first measurement at $\sqrt{s_{\rm NN}} = $ 130
GeV shows the same trend. Comparisons with model predictions provides an
indication of possible medium effects on the resonance and their decay
daughters.


title: Resonance Production in STAR

abstract:
  The recent results from resonance production in central Au+Au and p+p
collisions at $\sqrt{s_{\rm NN}} = $ 200 GeV from the STAR experiment at RHIC
are presented and discussed.


title:
Helicity-Dependent Angular Distributions in Double-Charged-Pion
  Photoproduction

abstract:
  Two-pion photoproduction in the reaction gamma + p -> p + pi^+ + pi^- has
been studied at Jefferson Lab Hall B using a circularly-polarized tagged photon
beam in the energy range between 0.6 GeV and 2.3 GeV. Owing to the large
angular acceptance of the CLAS detector, complete beam-helicity-dependent
angular distributions of the final-state particles were measured. The large
cross-section asymmetries exhibit strong sensitivity to the kinematics of the
reaction and provide valuable information on the reaction dynamics. Preliminary
results are presented.


title:
Coulomb proximity decay: A clock for measuring the particle emission
  time scale

abstract:
  A new method to examine the time scale of particle emission from hot nuclei
is explored. Excited projectile-like and target-like fragments decay as they
separate following a peripheral heavy-ion collision. Their mutual Coulomb
influence results in an anisotropic angular distribution of emitted particles,
providing a measure of the particle emission time scale. Predictions of a
schematic evaporation model are presented and compared to experimental data.


title: DVCS with CLAS

abstract:
  Generalized parton distributions provide a unifying framework for the
interpretation of exclusive reactions at high $Q^2$. The most promising
reaction for the investigation of these distributions is the hard production of
photons using Deeply Virtual Compton Scattering (DVCS). This reaction can be
accessed experimentally by determining the production asymmetry using polarized
electrons on a proton target. Pioneering experiments with CLAS and HERMES have
produced the first measurements of this asymmetry. We will review the current
experimental program to study DVCS at Jefferson Lab. Recent high statistics
data taken with CLAS at 5.75 GeV allows us to determine this asymmetry at low
-$t$ in the valence region ($x_{B}$=0.1-0.5) up to a $Q^2$ of 4 GeV$^2/c^2$.


title:
Event-wise mean p_t fluctuations in Au-Au collisions at sqrt{s_{NN}} =
  130 GeV

abstract:
  We present the first large-acceptance measurement of event-wise mean
transverse momentum mean p_t fluctuations for Au-Au collisions at
nucleon-nucleon center-of-momentum collision energy sqrt{s_{NN}} = 130 GeV. The
observed non-statistical mean p_t fluctuations substantially exceed in
magnitude fluctuations expected from the finite number of particles produced in
a typical collision. The r.m.s. fractional width excess of the event-wise mean
p_t distribution is 13.7 +/- 0.1(stat) +/- 1.3(syst)% relative to a statistical
reference, for the 15% most-central collisions and for charged hadrons within
pseudorapidity range |eta|<1, 2pi azimuth and 0.15 < p_t < 2 GeV/c. The width
excess varies smoothly but non-monotonically with collision centrality, and
does not display rapid changes with centrality which might indicate the
presence of critical fluctuations. The reported mean p_t fluctuation excess is
qualitatively larger than those observed at lower energies and differs markedly
from theoretical expectations. Contributions to mean p_t mean fluctuations from
semi-hard parton scattering in the initial state and dissipation in the bulk
colored medium are discussed.


title: Liquid Argon Ionization Detector for Double Beta Decay Studies

abstract:
  A multisection liquid argon ionization detector was developed by the DBA
collaboration to study the double beta- decay of $^{100}$Mo. The experiment was
carried out in the Gran Sasso underground laboratory in Italy. The detector
design and main characteristics are described. The $\beta \beta (2\nu)$ decay
of $^{100}$Mo was observed and its half-life measured: $T_{1/2}=[7.2 \pm
0.9(stat) \pm 1.8(syst)] \times 10^{18}$ yr. Limits on the 0$\nu $ and 0$\nu
\chi ^{0}$ modes of the decay were obtained: $T_{1/2}> 8.4(4.9) \times 10^{21}$
yr and $T_{1/2}> 4.1(3.2)\times 10^{20}$ yr at 68% (90%) C.L., respectively. In
addition the upper limits on the $^{42}$Ar content and $^{222}$Rn activity in
liquid Ar were found to be $4.3 \times 10^{-21}$ g/g and $1.2 \times 10^{-3}$
Bq/kg, respectively.


title: Exploring QCD with Heavy Ion Collisions

abstract:
  After decades of painstaking research, the field of heavy ion physics has
reached an exciting new era. Evidence is mounting that we can create a high
temperature, high density, strongly interacting ``bulk matter'' state in the
laboratory -- perhaps even a quark-gluon plasma. This strongly interacting
matter is likely to provide qualitative new information about the fundamental
strong interaction, described by Quantum Chromodynamics (QCD). These lectures
provide a summary of experimental heavy ion research, with particular emphasis
on recent results from RHIC (Relativistic Heavy Ion Collider) at Brookhaven
National Laboratory. In addition, we will discuss what has been learned so far
and the outstanding puzzles.


title:
Kaon and Lambda Production at Intermediate $p_T$: Insights into the
  Hadronization of the Bulk Partonic Matter Created in Au+Au Collisions at RHIC

abstract:
  Measurements of identified particles over a broad $p_T$ range may provide
strong evidence for the existence of a thermalized partonic state in heavy-ion
collisions (\textit{i.e.} a quark-gluon plasma). Of particular interest are the
centrality dependence and the azimuthal anisotropy in the yield of baryons and
mesons at intermediate $p_T$. The first measurements of $v_2$ and the
number-of-binary-collisions scaled centrality ratio $R_{CP}$ for $K_S^0$ and
$\Lambda+\bar{\Lambda}$ production in Au+Au collisions at RHIC are presented.
These measurements from the STAR detector establish the particle-type
dependence of $v_2$ and $R_{CP}$ within $0.4 < p_T < 6.0$. At intermediate
$p_T$ (1.5--4.5 GeV/c) $v_2$ of $K_S^0$ and $\Lambda+\bar{\Lambda}$ is shown to
follow a number-of-constituent-quark scaling with v_2^{kaon}(p_T/2)/2 =
v_2^{lambda}(p_T/3)/3. $R_{CP}$ shows that lambda production at intermediate
$p_T$ increases more rapidly with system size than kaon production: consistent
with multi-parton dynamics in particle production. At $p_T = 5.5$ GeV/c lambda,
kaon, and charged hadron production are suppressed by a similar factor ($R_{CP}
\approx 0.33$): establishing the extent of the centrality dependent baryon
enhancement. The particle- and $p_T$-dependence of $v_2$, and $R_{CP}$ are
consistent with expectations based on hadronization of bulk partonic matter by
coalescence. As such, the constituent-quark-number scaled $v_2$ may reflect the
anisotropy established in a partonic stage providing strong evidence for the
existence of a quark-gluon plasma in Au+Au collisions at RHIC.


title:
Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury
  Neutrino Observatory with Enhanced Neutral Current Sensitivity

abstract:
  The Sudbury Neutrino Observatory (SNO) has precisely determined the total
active (nu_x) 8B solar neutrino flux without assumptions about the energy
dependence of the nu_e survival probability. The measurements were made with
dissolved NaCl in the heavy water to enhance the sensitivity and signature for
neutral-current interactions. The flux is found to be 5.21 +/- 0.27 (stat) +/-
0.38 (syst) x10^6 cm^{-2}s^{-1}, in agreement with previous measurements and
standard solar models. A global analysis of these and other solar and reactor
neutrino results yields Delta m^{2} = 7.1^{+1.2}_{-0.6}x10^{-5} ev^2 and theta
= 32.5^{+2.4}_{-2.3} degrees. Maximal mixing is rejected at the equivalent of
5.4 standard deviations.


title: Dissipation of angular momentum in light heavy ion collision

abstract:
  The inclusive energy distributions of fragments (4$\leq$Z$\leq$7) emitted in
the reactions $^{16}$O (116 MeV) + $^{27}$Al, $^{28}$Si, $^{20}$Ne (145 MeV) +
$^{27}$Al, $^{59}$Co have been measured in the angular range $\theta_{lab} $=
10$^\circ$ - 65$^\circ$. Fusion-fission and deep inelastic components of the
fragment emission have been extracted from the experimental data. The angular
mometum dissipations in fully damped deep inelastic collisions have been
estimated assming exit channel configuration similar to those for
fusion-fission process. It has been found that, the angular momentum
dissipations are more than those predicted by the empirical sticking limit in
all cases. The deviation is found to increase with increasing charge transfer
(lighter fragments). Qualitatively, this may be due to stronger friction in the
exit channel. Moreover, for the heavier system $^{20}$Ne + $^{59}$Co, the
overall magnitude of deviation is less as compared to those for the lighter
systems, {\it i.e.}, $^{16}$O + $^{27}$Al, $^{28}$Si, $^{20}$Ne + $^{27}$Al.
This may be due to lesser overlap in time scales of fusion and deep inelastic
time scales for heavier systems.


title: Strangeness Production Experiments at Jefferson Lab

abstract:
  Experimental results for photo- and electro-production of open strangeness
from the Thomas Jefferson National Accelerator Facility are discussed. The
results are from work completed by mid-2003 on elementary $KY$ production,
nuclear targets, and the exotic $\Theta^+$ state. It is shown how the increases
in intensity and precision of JLab experiments over earlier work have allowed
new phenomena to become measurable.


title: Search for 12C+12C molecule in 24Mg* populated by 24Mg+12C

abstract:
  The gamma-decay properties of 24Mg excited states are investigated in the
inverse reaction 24Mg+12C at E(24Mg) = 130 MeV. At this energy the direct
inelastic scattering populates a 24Mg* energy region where 12C+12C breakup
resonances can occur. Very exclusive data were collected with the Binary
Reaction Spectrometer (BRS) in coincidence with EUROBALL installed at the
VIVITRON Tandem facility of the IReS at Strasbourg. The experimental detection
system is decribed and preliminary results of binary reaction coincid data are
presented.


title: Parity Violation with Electrons and Hadrons

abstract:
  A key question in understanding the structure of nucleons involves the role
of sea quarks in their ground state electromagnetic properties such as charge
and magnetism. Parity-violating electron scattering, when combined with
determination of nucleon electromagnetic form factors from parity-conserving
e-N scattering, provides another degree of freedom to separately determine the
up, down and strange quark contributions to nucleon electromagnetic structure.
Strange quarks are unique in that they are exclusively in the nucleon's sea. A
program of experiments using parity violating electron scattering has been
underway for approximately a decade, and results are beginning to emerge. This
paper is a brief overview of the various experiments and their results to date
along with a short-term outlook of what can be anticipated from experiments in
the next few years.


title:
Low-Energy Photodisintegration of the Deuteron and Big-Bang
  Nucleosynthesis

abstract:
  The photon analyzing power for the photodisintegration of the deuteron was
measured for seven gamma-ray energies between 2.39 and 4.05 MeV using the
linearly polarized gamma-ray beam of the High-Intensity Gamma-ray Source at the
Duke Free-Electron Laser Laboratory. The data provide a stringent test of
theoretical calculations for the inverse reaction, the neutron-proton radiative
capture reaction at energies important for Big-Bang Nucleosynthesis. Our data
are in excellent agreement with potential model and effective field theory
calculations. Therefore, the uncertainty in the baryon density obtained from
Big-Bang Nucleosynthesis can be reduced at least by 20%.


title:
Spin polarizabilities and polarizabilities of the nucleon studied by
  free and quasi-free Compton scattering at MAMI (Mainz)

abstract:
  In addition to the E2/M1 ratio of the N->$\Delta$ transition, the
electromagnetic polarizabilities and spin-polarizabilities are important
structure constants of the nucleon which serve as sensitive tests of chiral
perturbation theory and of models of the nucleon. Recently, these quantities
have been investigated experimentally at MAMI (Mainz) by high-precision Compton
scattering using hydrogen and deuterium targets, where for the latter the
method of quasi-free scattering has been applied.


title: Implications of the discrepancy between proton form factor measurements

abstract:
  Recent polarization transfer measurements of the proton electromagnetic form
factors yield very different results from previous Rosenbluth extractions. This
inconsistency implies uncertainties in our knowledge of the form factors and
raises questions about how to best combine data from these two techniques. If
the discrepancy is due to missing correction to the cross section data, as has
been suggested, then different applications will require the use of different
form factors. We present two extractions of the form factors: a global fit to
the world's cross section data, and a combined extraction from polarization
transfer and cross section data. The former provides a parametrization of the
elastic electron-proton cross section, while the latter provides a consistent
extraction of the underlying form factors, under the assumption that missing
terms in the radiative correction explain the difference between the cross
section and polarization transfer results.


title:
Pion, kaon, proton and anti-proton transverse momentum distributions
  from p+p and d+Au collisions at $\sqrt{s_{NN}} = 200$ GeV

abstract:
  Identified mid-rapidity particle spectra of $\pi^{\pm}$, $K^{\pm}$, and
$p(\bar{p})$ from 200 GeV p+p and d+Au collisions are reported. A
time-of-flight detector based on multi-gap resistive plate chamber technology
is used for particle identification. The particle-species dependence of the
Cronin effect is observed to be significantly smaller than that at lower
energies. The ratio of the nuclear modification factor ($R_{dAu}$) between
protons $(p+\bar{p})$ and charged hadrons ($h$) in the transverse momentum
range $1.2<{p_{T}}<3.0$ GeV/c is measured to be
$1.19\pm0.05$(stat)$\pm0.03$(syst) in minimum-bias collisions and shows little
centrality dependence. The yield ratio of $(p+\bar{p})/h$ in minimum-bias d+Au
collisions is found to be a factor of 2 lower than that in Au+Au collisions,
indicating that the Cronin effect alone is not enough to account for the
relative baryon enhancement observed in heavy ion collisions at RHIC.


title:
Centrality dependence of charged antiparticle to particle ratios near
  mid-rapidity in d+Au collisions at sqrt(s_NN)=200 GeV

abstract:
  The ratios of the yields of charged antiparticles to particles have been
obtained for pions, kaons, and protons near mid-rapidity for d+Au collisions at
sqrt(s_NN) = 200 GeV as a function of centrality. The reported values represent
the ratio of the yields averaged over the rapidity range of 0.1<y_pi<1.3 and
0<y_(K,p)<0.8, where positive rapidity is in the deuteron direction, and for
transverse momenta 0.1<p_(T)^(pi,K)<1.0 GeV/c and 0.3<p_(T)^(p)<1.0 GeV/c.
Within the uncertainties, a lack of centrality dependence is observed in all
three ratios. The data are compared to results from other systems and model
calculations.


title:
Oscillations and Cross Sections at the SNS with a Large Cerenkov
  Detector

abstract:
  MiniBooNE at FermiLab should be able to confirm or refute the LSND
Decay-in-Flight $\nu_\mu \to \nu_e$ oscillation signal within a few years. The
primary evidence of neutrino oscillations from the LSND was in the
anti-neutrino channel $\bar{\nu}_\mu \to \bar{\nu}_e$ channel, which may not be
accessible at MiniBooNE for many years. The rates of signal and background are
presented for a MiniBooNE style detector with a 250 ton mineral oil fiducial
mass ($\sim$300m$^3$ fiducial volume) placed 60 meters from the Oak Ridge SNS
beam stop. Several hundred $\bar{\nu}_\mu \to \bar{\nu}_e$ events could be
measured in one beam year, even at the conservative end of the combined
analysis of LSND and KARMEN. The same detector could easily measure
neutrino-nucleus cross sections if filled with any interesting transparent
fluid, several of which are suggested here. The rate and backgrounds for a
methylene iodide filled detector are also presented as an example.


title: Hard scattering at RHIC: Experimental review

abstract:
  The most significant results on hard scattering processes in Au+Au, p+p, and
d+Au collisions at sqrt(s_NN) = 200 GeV obtained after 3 years of operation at
the BNL Relativistic Heavy-Ion Collider (RHIC) are summarized. Hadron
production at high transverse momentum (p_T) in central Au+Au collisions shows
very different properties (production yields, flavor composition, azimuthal
correlations, ...) in comparison to p+p, d+Au, and peripheral Au+Au collisions,
and this fact constitutes arguably the most interesting outcome of the
experimental program so far. Four main topics are covered in this report: (i)
the depletion of high p_T inclusive hadron spectra, (ii) the ``anomalous''
baryon-meson composition at intermediate p_T's, (iii) the disappearance of
away-side azimuthal (jet) correlations, and (iv) the large value of collective
azimuthal (elliptic flow) correlations. Additionally, the observed high p_T
``Cronin enhancement'' in d+Au collisions will be discussed. A succinct
comparison of experimental data to theoretical models is also provided.


title:
Statistical Multifragmentation of Non-Spherical Expanding Sources in
  Central Heavy-Ion Collisions

abstract:
  We study the anisotropy effects measured with INDRA at GSI in central
collisions of Xe+Sn at 50 A.MeV and Au+Au at 60, 80, 100 A.MeV incident energy.
The microcanonical multifragmentation model with non-spherical sources is used
to simulate an incomplete shape relaxation of the multifragmenting system. This
model is employed to interpret observed anisotropic distributions in the
fragment size and mean kinetic energy. The data can be well reproduced if an
expanding prolate source aligned along the beam direction is assumed. An either
non-Hubblean or non-isotropic radial expansion is required to describe the
fragment kinetic energies and their anisotropy. The qualitative similarity of
the results for the studied reactions suggests that the concept of a
longitudinally elongated freeze-out configuration is generally applicable for
central collisions of heavy systems. The deformation decreases slightly with
increasing beam energy.


title: Coherent Pion Photoproduction on Deuterium

abstract:
  Differential cross sections of the gamma + d -> d + pi^0 reaction were
measured at photon beam energies between 0.5 and 2.0 GeV over a wide angular
range in CM system. The experiment was performed in Hall B at Jefferson Lab
using the CLAS detector. The excitation function, especially at backward CM
scattering angles, has been studied with regard to effects due to intermediate
on-shell eta and omega rescattering. At CM scattering angles greater than 123
deg our data clearly show an enhancement around 0.7 GeV, which could be
attributed to an intermediate on-shell eta-state.


title: Evidence for the Jacobi shape transition in hot 46Ti

abstract:
  The gamma-rays from the decay of the GDR in 46Ti compound nucleus formed in
the 18O+28Si reaction at bombarding energy 105 MeV have been measured in an
experiment using a setup consisting of the combined EUROBALL IV, HECTOR and
EUCLIDES arrays. A comparison of the extracted GDR lineshape data with the
predictions of the thermal shape fluctuation model shows evidence for the
Jacobi shape transition in hot 46Ti. In addition to the previously found broad
structure in the GDR lineshape region at 18-27 MeV caused by large
deformations, the presence of a low energy component (around 10 MeV), due to
the Coriolis splitting in prolate well deformed shape, has been identified for
the first time.


title: Analysing power A(y) in the reaction p(pol.)p --> pp eta near threshold

abstract:
  A first measurement of the analysing power in the reaction p(pol)p --> pp eta
near the production threshold has been performed at the internal facility
COSY-11 at the COoler SYnchrotron COSY.


title: Transport and cooling of singly-charged noble gas ion beams

abstract:
  The transport and cooling of noble gas singly-charged ion beams by means of a
Radio Frequency Quadrupole Cooler Buncher (RFQCB) have been studied at the
LIMBE low energy beam line of the GANIL facility. Ions as light as $^{4}He^+$
have been cooled and stored before their extraction in bunches using $H_2$ as
buffer gas. Bunches characteristics have been studied as a function of the
parameters of the device. Sizeable transmissions of up to 10 $% $ have been
obtained. A detailed study of the lifetime of ions inside the buncher has been
performed giving an estimate of the charge exchange cross-section. Results of a
microscopic Monte-Carlo transport code show reasonable agreement with
experimental data.


title:
Reaction 48Ca+208Pb: the capture-fission cross-sections and the
  mass-energy distributions of fragments above and deep below the Coulomb
  barrier

abstract:
  The capture-fission cross-sections in an energy range of 206-242 MeV of
48Ca-projectiles and mass-energy distributions (MEDs) of reaction products in
an energy range of 211-242 MeV have been measured in the 48Ca+208Pb reaction
using the double-arm time-of-flight spectrometer CORSET. The MEDs of fragments
for heated fission were shown to consist of two components. One component,
which is due to classical fusion-fission, is associated with the symmetric
fission of the 256No compound nucleus. The other component, which appears as
''shoulders'', is associated with the quasi-fission process and can be named
''quasi-fission shoulders''. Those quasi-fission shoulders enclose light
fragments whose masses are 60-90 a.m.u. The total kinetic energy (TKE) of the
fragments that belong to the shoulders is higher than the value expected for a
classical fusion-fission process. We have come to the conclusion that in
quasi-fission, spherical shells with Z=28 and N=50 play a great role. It has
also been demonstrated that the properties of the MEDs of fragments formally
agree with a well-known hypothesis of two independent fission modes; in this
case the modes are normal fusion-fission and quasi-fission processes. A
high-energetic Super-Short mode of classical fission has been found at low
excitation energies in the mass range of heavy fragments M = 130-135 and TKE =
233 MeV; however the yield associated with this mode is small.


title: Anomalously hindered E2 strength B(E2;2_1^+ -> 0^+) in 16C

abstract:
  The electric quadrupole transition from the first 2+ state to the ground 0+
state in 16C is studied through measurement of the lifetime by a recoil shadow
method applied to inelastically scattered radioactive 16C nuclei. The measured
lifetime is 75 +- 23 ps, corresponding to a B(E2;2_1+ -> 0^+) value of 0.63 +-
0.19 e2fm4, or 0.26 +- 0.08 Weisskopf units. The transition strength is found
to be anomalously small compared to the empirically predicted value.


title:
Parity-violating Electron Deuteron Scattering and the Proton's Neutral
  Weak Axial Vector Form Factor

abstract:
  We report on a new measurement of the parity-violating asymmetry in
quasielastic electron scattering from the deuteron at backward angles at Q2=
0.038 (GeV/c)2. This quantity provides a determination of the neutral weak
axial vector form factor of the nucleon, which can potentially receive large
electroweak corrections. The measured asymmetry A=-3.51 +/- 0.57(stat) +/-
0.58(sys)ppm is consistent with theoretical predictions. We also report on
updated results of the previous experiment at Q2=0.091 (GeV/c)2, which are also
consistent with theoretical predictions.


title:
Measurement of Electron Backscattering in the Energy Range of Neutron
  $\beta$-Decay

abstract:
  We report on the first detailed measurements of electron backscattering from
low Z targets at energies up to 124 keV. Both energy and angular distributions
of the backscattered electrons are measured and compared with electron
transport simulations based on the Geant4 and Penelope Monte Carlo simulation
codes. Comparisons are also made with previous, less extensive, measurements
and with measurements at lower energies.


title: Production of Pseudoscalar Mesons

abstract:
  Experiments that study the hadronic and electromagnetic production of the
pseudoscalar mesons -- pions, etas and kaons, contribute to our knowledge of
the properties of baryon and hyperon resonances. Fixed-target programs at
hadronic facilities such as BNL-AGS have been phased out. However, the
availability of modern experimental facilities with pseudo-monochromatic or
tagged medium-energy photon beams at GRAAL, SPring-8, Bonn, Mainz, and
Jefferson Lab, together with LEGS, Max-Lab, and HIGS at lower energies, are
beginning to produce high-quality results. These new data have smaller
statistical uncertainties and better understood systematic uncertainties, than
those obtained at the older bremsstrahlung facilities, for measurements of
differential and integrated cross sections, as well as polarization and
asymmetry. Experimental results are compared with the predictions of QCD-based
approaches, such as the lattice-gauge calculations of baryon properties, and
Chiral Perturbation Theory applied to threshold photoproduction, and are
essential to the performance of Partial-Wave Analyses (PWA). These PWA studies
are less model dependent than in the past, and are used in coupled-channels
calculations that incorporate unitarity dynamically, and combine results from
hadronic reaction channels with electromagnetic processes. This approach is
necessary to extract resonance properties and may lead to the discovery of the
"missing resonances" predicted by a number of different QCD-inspired
calculations. We discuss recent experimental and phenomenological results for
single and double pseudoscalar meson hadronic and photoproduction channels with
emphasis on the JLab Hall B and the BNL/AGS Crystal Ball programs.


title:
Identified particle distributions in pp and Au+Au collisions at
  sqrt{s_NN}=200 GeV

abstract:
  Transverse mass and rapidity distributions for charged pions, charged kaons,
protons and antiprotons are reported for sqrt{s_NN}=200 GeV pp and Au+Au
collisions at RHIC. The transverse mass distributions are rapidity independent
within |y|<0.5, consistent with a boost-invariant system in this rapidity
interval. Spectral shapes and relative particle yields are similar in pp and
peripheral Au+Au collisions and change smoothly to central Au+Au collisions. No
centrality dependence was observed in the kaon and antiproton production rates
relative to the pion production rate from medium-central to central collisions.
Chemical and kinetic equilibrium model fits to our data reveal strong radial
flow and relatively long duration from chemical to kinetic freeze-out in
central Au+Au collisions. The chemical freeze-out temperature appears to be
independent of initial conditions at RHIC energies.


title:
Measurement of Non-Random Event-by-Event Fluctuations of Average
  Transverse Momentum in sqrt(s_NN)=200 GeV Au+Au and p+p Collisions

abstract:
  Event-by-event fluctuations of the average transverse momentum of produced
particles near mid-rapidity have been measured by the PHENIX Collaboration in
sqrt(s_NN)=200 GeV Au+Au and p+p collisions at the Relativistic Heavy Ion
Collider. The fluctuations are observed to be in excess of the expectation for
statistically independent particle emission for all centralities. The excess
fluctuations exhibit a dependence on both the centrality of the collision and
on the transverse momentum window over which the average is calculated. Both
the centrality and p_T dependence can be well reproduced by a simulation of
random particle production with the addition of contributions from hard
scattering processes.


title:
Proton induced reaction cross section measurements on Se isotopes for
  the astrophysical p process

abstract:
  As a continuation of a systematic study of reactions relevant to the
astrophysical p process, the cross sections of the 74,76Se(p,gamma)75,77Br and
82Se(p,n)82Br reactions have been measured at energies from 1.3 to 3.6 MeV
using an activation technique. The results are compared to the predictions of
Hauser-Feshbach statistical model calculations using the NON-SMOKER and MOST
codes. The sensitivity of the calculations to variations in the optical proton
potential and the nuclear level density was studied. Good agreement between
theoretical and experimental reaction rates was found for the reactions
74Se(p,gamma)75Br and 82Se(p,n)82Br.


title: JLab: Probing Hadronic Physics with Electrons and Photons

abstract:
  Precision measurements of the structure of nucleons and nuclei in the regime
of strong interaction QCD are now possible with the availability of high
current polarized electron beams, polarized targets, and recoil polarimeters,
in conjunction with modern spectrometers and detector instrumentation. The
physics at JLab will be highlighted using two recent measurements of general
interest. The ratio of the proton electric to magnetic form factors indicates
the importance of the role of angular momentum in the structure of the nucleon.
The existence of 5-quark configurations in the ground state wavefunctions of
hadrons is confirmed by a narrow peak attributed to an exotic baryon with
strangeness S=+1. These and other examples will be used to illustrate the
capabilities and focus of the experimental program at JLab.


title: On the rms-radius of the proton

abstract:
  We study the world data on elastic electron-proton scattering in order to
determine the proton charge rms-radius. After accounting for the Coulomb
distortion and using a parameterization that allows to deal properly with the
higher moments we find a radius of 0.895+-0.018 fm, which is significantly
larger than the radii used in the past.


title:
Multifragmentation and nuclear phase transitions (liquid-fog and
  liquid-gas)

abstract:
  Thermal multifragmentation of hot nuclei is interpreted as the nuclear
liquid-fog phase transition. The charge distributions of the intermediate mass
fragments produced in p(3.6 GeV) + Au and p(8.1 GeV) + Au collisions are
analyzed within the statistical multifragmentation model with the critical
temperature for the nuclear liquid-gas phase transition Tc as a free parameter.
The analysis presented here provides strong support for a value of Tc > 15 MeV.


title:
Results on High p_T Particle Production from the PHENIX Experiment at
  RHIC

abstract:
  Transverse momentum (p_T) spectra of neutral pions and charged hadrons
measured in Au+Au and d+Au collisions at sqrt{s_NN}=200 GeV by the PHENIX
experiment at RHIC are compared to p+p reference spectra at the same
sqrt{s_NN}. In central Au+Au collisions a factor 4-5 suppression for neutral
pions and charged hadrons with p_T > 5 GeV/c is found relative to the p+p
reference scaled by the nuclear overlap function <T_AB>. In contrast, such a
suppression of high p_T particles is absent in d+Au collisions.


title:
In-Medium rho^0 Spectral Function Study via the 2H, 3He,
  12C(gamma,pi+pi-) Reaction

abstract:
  We report a helicity analysis of sub-threshold rho^0 production on 2H, 3He
and 12C at low photo-production energies. The results are indicative of a large
longitudinal rho^0 polarization (l=1, m=0) and are consistent with a strong
helicity-flip production mechanism. This signature is used to extract in-medium
rho^0_L invariant mass distributions for all three nuclei in a manner which is
less model-dependent than previous measurements. The results are compared to
kinematic and phenomenological models of the rho^0 spectral function. The 2H
and 3He data distributions support the role of N*(1520) excitation in shaping
the in-medium rho^0_L invariant mass distribution, while the 12C distributions
are consistent with quasi-free rho^0_L production. The data support an
in-medium modification of the rho^0_L invariant mass distribution.


title:
Isospin effects on two-particle correlation functions in E/A = 61 MeV
  36Ar + 112,124Sn reactions

abstract:
  Small-angle, two-particle correlation functions have been measured for 36Ar+
112,124Sn collisions at E/A = 61 MeV. Total momentum gated neutron-proton (np)
and proton-proton (pp) correlations are stronger for the 124Sn-target. Some of
the correlation functions for particle pairs involving deuterons or tritons
(nd, pt, and nt) also show a dependence on the isospin of the emitting source.


title: Experimental Signals of Phase Transition

abstract:
  The connection between the thermodynamics of charged finite nuclear systems
and the asymptotically measured partitions is presented. Some open questions,
concerning in particular equilibrium partitions are discussed. We show a
detailed comparison of the decay patterns in Au+ C,Cu,Au central collisions and
in Au quasi-projectile events. Observation of abnormally large fluctuations in
carefully selected samples of data is reported as an indication of a first
order phase transition (negative heat capacity) in the nuclear equation of
state.


title: Single Proton Knock-Out Reactions from 24,25,26F

abstract:
  The cross sections of the single proton knock-out reactions from 24F, 25F,
and 26F on a 12C target were measured at energies of about 50 MeV/nucleon.
Ground state populations of 6.6+-.9 mb, 3.8+-0.6 mb for the reactions
12C(24F,23O) and 12C(25F,24O) were extracted, respectively. The data were
compared to calculations based on the many-body shell model and the eikonal
theory. In the reaction 12C(26F,25O) the particle instability of 25O was
confirmed.


title:
Isotope correlations as a probe for freeze-out characterization: central
  124Sn+64Ni, 112Sn+58Ni collisions

abstract:
  124Sn+64Ni and 112Sn+58Ni reactions at 35 AMeV incident energy were studied
with the forward part of CHIMERA multi-detector. The most central collisions
were selected by means of a multidimensional analysis. The characteristics of
the source formed in the central collisions, as size, temperature and volume,
were inspected. The measured isotopes of light fragments (3 <= Z <=8) were used
to examine isotope yield ratios that provide information on the free neutron to
proton densities.


title: High Resolution Heavy Ion Track Structure Imaging

abstract:
  The difference in the relative biological efficincy (RBE) of ions of same
linear energy transfer (LET) but different atomic number (Z) can be attributed
to the difference in the radial ionisation distribution. In this contribution
we present data from measurements of the spatial ionisation pattern of heavy
ions of various Z but similar LET and compare the results with track structure
data obtained by Monte Carlo simulations. The measurements were made with a
time projection chamber with optical readout (Optical Avalanche Chamber, OPAC)
which is able to quantitatively capture the spatial ionisation pattern of an
ion traversing the chamber


title: Half-life Limit of 19Mg

abstract:
  A search for 19Mg was performed using projectile fragmentation of a 150
MeV/nucleon 36Ar beam. No events of 19Mg were observed. From the time-of-flight
through the fragment separator an upper limit of 22 ns for the half-life of
19Mg was established.


title:
Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n)
  reaction

abstract:
  We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n)
reaction by stopping negative kaons in a superfluid helium target.
  A clear enhancement was observed in the neutron spectrum, which indicates the
formation of a strange tribaryon of charge +1 with a mass and width of M = 3141
+/- 3 (stat.) +4/-1 (sys.) MeV/c^2 and G < 23 MeV/c^2. This state, denoted as
S^+(3140), is about 25 MeV/c^2 higher than the previously observed S^0(3115)
T=1.


title: Heavy Ion Collisions

abstract:
  Lattice QCD predicts a phase transition between hadronic matter and a system
of deconfined quarks and gluons (the Quark Gluon Plasma) at high energy
densities. Recent results from the Brookhaven Relativistic Heavy Ion Collider
(RHIC) dedicated to the study of QCD at extreme densities will be discussed and
compared to measurements obtained at the CERN Super Proton Synchrotron (SPS).


title: Ultra-Peripheral Collisions with STAR at RHIC

abstract:
  The strong electromagnetic fields of heavy nuclei can produce a wide variety
of two-photon and photonuclear reactions at relativistic ion colliders. We
present recent results from the STAR collaboration on these `ultra-peripheral'
interactions, focusing on vector meson production and interferometry, and on
$e^+e^-$ pair production. The vector meson interferometry occurs because of the
symmetric initial state: nucleus 1 can emit a photon which scatters from
nucleus 2, emerging as a vector meson, or vice-versa. The two processes are
indistinguishable, and so interfere, even though the production points are
separated enough that the produced mesons decay before their wave functions can
overlap, so the system can be used for interesting tests of quantum mechanics.


title:
A Measurement of the Exclusive 3He(e,e'p) Reaction Below the
  Quasi-Elastic Peak

abstract:
  New, high-precision measurements of the 3He(e,e'p) reaction using the A1
collaboration spectrometers at the Mainz microtron MAMI are presented. These
were performed in antiparallel kinematics at energy transfers below the
quasi-elastic peak, and at a central momentum transfer of 685 MeV/c. Cross
sections and distorted momentum distributions were extracted and compared to
theoretical predictions and existing data. The longitudinal and transverse
behavior of the cross section was also studied. Sizable differences in the
cross-section behavior from theoretical predictions based on Plane Wave Impulse
Approximation were observed in both the two- and three-body breakup channels.
Full Faddeev-type calculations account for some of the observed excess cross
section, but significant differences remain.


title:
Interferometry of Direct Photons in Central 280Pb+208Pb Collisions at
  158A GeV

abstract:
  Two-particle correlations of direct photons were measured in central
208Pb+208Pb collisions at 158 AGeV. The invariant interferometric radii were
extracted for 100<K_T<300 MeV/c and compared to radii extracted from charged
pion correlations. The yield of soft direct photons, K_T<300 MeV/c, was
extracted from the correlation strength and compared to theoretical
calculations.