122191299
Directed flow of identified particles from Au+Au collisions at RHIC
We present and K0s directed flow in Au+Au collisions at GeV and GeV, measured by the STAR experiment. To improve the event plane resolution, we determine the event plane from sideward deflection of spectator neutrons measured by STAR's shower maximum detector at zero degree calorimeters (ZDC-SMD), together with tracks reconstructed with the forward time projection chambers (FTPC). Our result will be presented as a function of pseudorapidity, transverse momentum and centrality.
122191299
Directed flow of identified particles from Au+Au collisions at RHIC
We present and K0s directed flow in Au+Au collisions at GeV and GeV, measured by the STAR experiment. To improve the event plane resolution, we determine the event plane from sideward deflection of spectator neutrons measured by STAR's shower maximum detector at zero degree calorimeters (ZDC-SMD), together with tracks reconstructed with the forward time projection chambers (FTPC). Our result will be presented as a function of pseudorapidity, transverse momentum and centrality.
123049469
Directed flow measurements from STAR
STAR measurements of v1 for identified particles for Au+Au collisions at = 200 GeV are presented. A negative v1 slope is observed for pions, protons, antiprotons and kaons (K0S) in 10-70% central collisions. For pion v1 slope, the comparison between the current result and available models (RQMD, UrQMD, AMPT, QGSM and hydro model with a tilted source) is made. In 5-30% central collisions, surprisingly sizable difference between v1 of protons and antiprotons is observed. The centrality and energy dependence of proton v1 are also presented. The charged hadron v1 for Cu+Cu collisions at = 22.4 GeV is measured and compared with results obtained previously.
18805981
System size and energy dependence of phi meson production at RHIC
We present a system size and energy dependence of meson production in Cu + Cu and Au + Au collisions at GeV and 200 GeV measured by the STAR experiment at RHIC. We find that the number of participant scaled meson yields in heavy-ion collisions over that of p + p collisions are larger than 1 and increase with collision energy. We compare the results with those of open-strange particles and discuss the physics implication.
18090238
Proton–proton fusion in effective field theory to fifth order
The proton–proton fusion process pp → de + νe is calculated at threshold to fifth order in pionless effective field theory. There are two unknown two-body currents contributing at the second and fourth orders. Combined with the previous results ¯
125706576
Novel effects of electromagnetic interaction on the correlation of nuclear matter
122417032
Hypernucleus physics at RHIC
Abstract We report recent progress in hypernucleus studies measured by the STAR collaboration at the Relativistic Heavy Ion Collider. We show a preliminary hypertriton measurement from our current event sample and discuss the next step for this project.
121652117
The L-G Phase Transition and the Nucleon–Nucleon Interaction Potential within QHD-I Model
The nucleon–nucleon interaction potential in hot/dense nuclear matter is studied within the QHD-I model. We find that a Yukawa potential, which contains attractive and repulsive terms, acting between nucleons is modified by the variation of the Debye mass. In particular, a nucleon system described by this Yukawa potential will be unbound at some critical T and μ. The critical point is very close to that of the L-G phase transition given in the literatures.