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 Studying re-scattering effect in heavy-ion collision through K* production

2015 ◽  
Vol 24 (05) ◽  
pp. 1550041 ◽  
Author(s):  
Subhash Singha ◽  
Bedangadas Mohanty ◽  
Zi-Wei Lin
Keyword(s):  
Transport Model ◽  
Heavy Ion ◽  
High Energy ◽  
Hadronic Phase ◽  
Nuclear Collisions ◽  
Scattering Effect ◽  
Ion Collisions ◽  
Multi Phase ◽  
Ion Collision ◽  
Phase Transport

We have studied the K* production within a multi-phase transport model (AMPT) for Au + Au collisions at [Formula: see text] to understand the hadronic re-scattering effect on the measured yields of the resonance. The hadronic re-scattering of the K* decay daughter particles (π and K) will alter their momentum distribution thereby making it difficult to reconstruct the K* signal through the invariant mass method. An increased hadronic re-scattering effect thus leads to a decrease in the reconstructed yield of K* in the heavy-ion collisions. Through this simulation study, we argue that a decrease in K*/K ratio with the increase in collision centrality necessarily reflects the hadronic re-scattering effect. Since the re-scattering occurs in the hadronic phase and K* has a lifetime of 4 fm/c, we present a toy model-based discussion on using measured K*/K to put a lower limit on the hadronic phase lifetime in high energy nuclear collisions.

scholarly journals Rapidity bin multiplicity correlations from a multi-phase transport model

2016 ◽  
Vol 52 (3) ◽  
Author(s):  
Mei-Juan Wang ◽  
Gang Chen ◽  
Yuan-Fang Wu ◽  
Guo-Liang Ma
Keyword(s):  
Transport Model ◽  
Multi Phase ◽  
Phase Transport

scholarly journals Further developments of a multi-phase transport model for relativistic nuclear collisions

2021 ◽  
Vol 32 (10) ◽  
Author(s):  
Zi-Wei Lin ◽  
Liang Zheng
Keyword(s):  
Transport Model ◽  
Dense Matter ◽  
Nuclear Collisions ◽  
Future Developments ◽  
Parton Cascade ◽  
Large Systems ◽  
Relativistic Nuclear Collisions ◽  
Main Components ◽  
Multi Phase ◽  
Phase Transport

AbstractA multi-phase transport (AMPT) model was constructed as a self-contained kinetic theory-based description of relativistic nuclear collisions as it contains four main components: the fluctuating initial condition, a parton cascade, hadronization, and a hadron cascade. Here, we review the main developments after the first public release of the AMPT source code in 2004 and the corresponding publication that described the physics details of the model at that time. We also discuss possible directions for future developments of the AMPT model to better study the properties of the dense matter created in relativistic collisions of small or large systems.

scholarly journals Investigation of the Elliptic Flow Fluctuations of the Identified Particles Using the a Multi-Phase Transport Model

Universe ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. 146
Author(s):  
Niseem Magdy ◽  
Xu Sun ◽  
Zhenyu Ye ◽  
Olga Evdokimov ◽  
Roy Lacey
Keyword(s):  
Transverse Momentum ◽  
Transport Model ◽  
Elliptic Flow ◽  
Momentum Dependence ◽  
Event Plane ◽  
First Order ◽  
Flow Fluctuations ◽  
Multi Phase ◽  
Phase Transport ◽  
Participant Plane

A Multi-Phase Transport (AMPT) model is used to study the elliptic flow fluctuations of identified particles using participant and spectator event planes. The elliptic flow measured using the first order spectator event plane is expected to give the elliptic flow relative to the true reaction plane which suppresses the flow fluctuations. However, the elliptic flow measured using the second-order participant plane is expected to capture the elliptic flow fluctuations. Our study shows that the first order spectator event plane could be used to study the elliptic flow fluctuations of the identified particles in the AMPT model. The elliptic flow fluctuations magnitude shows weak particle species dependence and transverse momentum dependence. Such observation will have important implications for understanding the source of the elliptic flow fluctuations.

scholarly journals Pseudorapidity dependence of short-range correlations from a multi-phase transport model

2016 ◽  
Vol 40 (3) ◽  
pp. 034105
Author(s):  
Mei-Juan Wang ◽  
Gang Chen ◽  
Guo-Liang Ma ◽  
Yuan-Fang Wu
Keyword(s):  
Short Range ◽  
Transport Model ◽  
Multi Phase ◽  
Phase Transport ◽  
Short Range Correlations

CENTRALITY, TRANSVERSE MOMENTUM AND PSEUDORAPIDITY DEPENDENCES OF “MACH-LIKE” CORRELATIONS IN A PARTONIC TRANSPORT MODEL

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2029-2034
Author(s):  
SONG ZHANG ◽  
G. L. MA ◽  
Y. G. MA ◽  
X. Z. CAI ◽  
J. H. CHEN
Keyword(s):  
Transverse Momentum ◽  
Impact Parameter ◽  
Transport Model ◽  
Hadronic Interactions ◽  
Azimuthal Correlations ◽  
Central Collisions ◽  
Splitting Parameter ◽  
Multi Phase ◽  
The Impact ◽  
Phase Transport

It has been observed a “Mach-like” structure of di-hadron azimuthal correlations in Au + Au central collisions at [Formula: see text] in the framework of a multi-phase transport model (AMPT) with both partonic and hadronic interactions. In this paper, we will show centrality, transverse momentum (pT) and pseudorapidity (η) dependences of “Mach-like” structure. The splitting parameter D, i.e. half distance between two splitting peaks on away side, decreases with the impact parameter b (corresponding to centrality) and slightly increases with transverse momentum of associated hadrons [Formula: see text], which from string melting AMPT version is consistent with experimental results. And the splitting parameter D is flat in mid-pseudorapidity region and rapidly decreases with the increasing of high-|η assoc |.

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