scholarly journals Beam energy and system dependence of rapidity-even dipolar flow

2018 ◽  
Vol 171 ◽  
pp. 16002
Author(s):  
Niseem Magdy
Keyword(s):  
Beam Energy ◽  
Collision System ◽  
Initial State ◽  
Specific Viscosity ◽  
200 Gev

New measurements of rapidity-even dipolar flow, veven1, are presented for several transverse momenta, pT, and centrality intervals in Au+Au collisions at [see formula in PDF] = 200, 39 and 19.6 GeV, U+U collisions at [see formula in PDF] = 193 GeV, and Cu+Au, Cu+Cu, d+Au and p+Au collisions at [see formula in PDF] = 200 GeV. The veven1 shows characteristic dependencies on pT, centrality, collision system and [see formula in PDF], consistent with the expectation from a hydrodynamic-like expansion to the dipolar fluctuation in the initial state. These measurements could serve as constraints to distinguish between different initialstate models, and aid a more reliable extraction of the specific viscosity η/s.

HYPERNUCLEUS PRODUCTION AT RHIC AND HIRFL-CSR ENERGY

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1829-1836
Author(s):  
SONG ZHANG ◽  
J. H. CHEN ◽  
Y. G. MA ◽  
Z. B. TANG ◽  
Z. B. XU
Keyword(s):  
Beam Energy ◽  
Transport Model ◽  
Rhic Energy ◽  
Collision System ◽  
Hadronic Phase ◽  
Multi Phase ◽  
Phase Transport

We calculated the hypertriton production at RHIC-STAR and HIRFL-CSR acceptance, with a multi-phase transport model (AMPT) and a relativistic transport model (ART), respectively. In specific, we calculated the Strangeness Population Factor [Formula: see text] at different beam energy. Our results from AGS to RHIC energy indicated that the collision system may change from hadronic phase at AGS energies to partonic phase at RHIC energies. Our calculation at HIRFL-CSR energy supports the proposal to measure hypertriton at HIRFL-CSR.

scholarly journals Beam-energy dependence of identified two-particle angular correlations in sNN=7.7–200 GeV Au+Au collisions

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
J. Adam ◽  
L. Adamczyk ◽  
J. R. Adams ◽  
J. K. Adkins ◽  
G. Agakishiev ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Beam Energy ◽  
Angular Correlations ◽  
200 Gev

scholarly journals Constraining the initial state granularity with bulk observables in Au+Au collisions at \sqrt{s_{\rm NN}}=200 GeV

2011 ◽  
Vol 38 (4) ◽  
pp. 045102 ◽  
Author(s):  
Hannah Petersen ◽  
Christopher Coleman-Smith ◽  
Steffen A Bass ◽  
Robert Wolpert
Keyword(s):  
Initial State ◽  
200 Gev

scholarly journals Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
S. Zhang ◽  
Y. G. Ma ◽  
J. H. Chen ◽  
C. Zhong
Keyword(s):  
Blast Wave ◽  
Energy Dependence ◽  
Beam Energy ◽  
Wave Model ◽  
Reverse Direction ◽  
Momentum Dependence ◽  
Correlation Lengths ◽  
200 Gev ◽  
Star Experiment ◽  
Scan Data

The beam energy dependence of correlation lengths (the Hanbury-Brown-Twiss radii) is calculated by using a blast-wave model and the results are comparable with those from RHIC-STAR beam energy scan data as well as the LHC-ALICE measurements. A set of parameters for the blast-wave model as a function of beam energy under study are obtained by fit to the HBT radii at each energy point. The transverse momentum dependence of HBT radii is presented with the extracted parameters for Au+Au collision at sNN = 200 GeV and for Pb+Pb collisions at 2.76 TeV. From our study one can learn that particle emission duration cannot be ignored while calculating the HBT radii with the same parameters. And tuning kinetic freeze-out temperature in a range will result in system lifetime changing in the reverse direction as it is found in RHIC-STAR experiment measurements.

scholarly journals JET MEASUREMENTS IN p+p AND D+Au COLLISIONS WITH STAR AT RHIC

2011 ◽  
Vol 20 (07) ◽  
pp. 1651-1655
Author(s):  
◽  
JAN KAPITÁN
Keyword(s):  
Quantitative Study ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Jet Quenching ◽  
Dense Medium ◽  
Initial State ◽  
Ion Collisions ◽  
Promising Tool ◽  
200 Gev ◽  
Nuclear Effects

Full jet reconstruction in heavy-ion collisions is a promising tool for the quantitative study of properties of the dense medium produced at RHIC. In addition to baseline measurements in p + p , results from d + Au collisions are needed to disentangle initial state nuclear effects from medium-induced k T broadening and jet quenching. We present mid-rapidity inclusive jet p T spectra and di-jet correlations (k T ) in 200 GeV p + p and d + Au collisions from the 2007-2008 RHIC run.

Event-by-event hadron ratio fluctuations from Au+Au collisions at RHIC-STAR

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Jian Tian
Keyword(s):  
Pair Production ◽  
Energy Dependence ◽  
Beam Energy ◽  
Central Collisions ◽  
Hadron Multiplicity ◽  
200 Gev ◽  
Dynamical Fluctuations ◽  
Star Detector

AbstractWe present measurements of event-by-event fluctuations on hadron multiplicity ratios (K/π, p/π, K/p) in Au+Au collisions at $\sqrt {s_{NN} } $ and 200 GeV using the STAR detector at RHIC. The magnitude of dynamical fluctuations σ dyn for p/π and K/p ratios change smoothly from a large negative value at 7.7 GeV to a smaller negative value at 200 GeV while that for the K/π ratios exhibits no significant beam energy dependence. The dynamical fluctuations related to pair production σ dynpair dyn for the p/K, K/p, K −/K + and p/p ratios at 200 GeV all exhibit a maximum at the mid-central collisions and decrease at the most peripheral and most central collisions.

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