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We demonstrate that proton and pion flow measurements in heavy-ion collisions at incident energies ranging from 1 to 20 GeV per nucleon in the fixed target frame can be used for an accurate determination of the symmetric nuclear matter…

核理论 · 物理学 2023-09-26 Dmytro Oliinychenko , Agnieszka Sorensen , Volker Koch , Larry McLerran

The evolution of the "microscopic" Hubble parameter related to the expansion of matter born in heavy-ion collisions was obtained for nucleons and pions. The calculations were carried out within the parton-hadron-string dynamics (PHSD)…

核理论 · 物理学 2026-02-05 N. V. Kolomoyets , O. V. Teryaev , V. Voronyuk

Utilizing the three-fireball picture within the quark combination model, we study systematically the charged particle pseudorapidity distributions in both Au+Au and Cu+Cu collision systems as a function of collision centrality and energy,…

高能物理 - 唯象学 · 物理学 2010-01-08 De-ming Wei , Feng-lan Shao , Jun Song , Yun-fei Wang

We present here the system size dependence of balance energy for semi-central and peripheral collisions using quantum molecular dynamics model. For this study, the reactions of $Ne^{20}+Ne^{20}$, $Ca^{40}+Ca^{40}$, $Ni^{58}+Ni^{58}$,…

核理论 · 物理学 2015-05-18 Rajiv Chugh , Rajeev K. Puri

The Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model, a microscopic transport model, is used to study the directed and elliptic collective flows and the nuclear stopping in Au+Au collisions at incident energies covered by INDRA…

核理论 · 物理学 2011-02-01 Qingfeng Li , Caiwan Shen , Chenchen Guo , Yongjia Wang , Zhuxia Li , J. Lukasik , W. Trautmann

The elliptic flows in both Cu+Cu and Au+Au collisions at the Relativistic Heavy Ion Collider are studied in a multi-phase transport model. For both collisions at same reduced impact parameter and minimum bias collisions, the elliptic flow…

核理论 · 物理学 2007-05-23 Lie-Wen Chen , Che Ming Ko

Dihadron azimuthal correlations in Au+Au collisions at $\sqrt{S_{NN}}$=200 GeV have been explored by using a multi-phase transport (AMPT) model. In order to obtain the contributions from jet-medium interactions, the combined harmonic flow…

核理论 · 物理学 2013-09-27 Yu-hui Zhu , Y. G. Ma , J. H. Chen , G. L. Ma , S. Zhang , C. Zhong

Collisions of isobar nuclei, those with the same mass number but different structure parameters, provide a new way to probe the initial condition of the heavy ion collisions. Using transport model simulation of $^{96}$Ru+$^{96}$Ru and…

核理论 · 物理学 2024-10-10 Somadutta Bhatta , Chunjian Zhang , Jiangyong Jia

In this work, we perform a model-to-data comparison for U+U and Au+Au collisions performed at RHIC at $\sqrt{s_{\rm NN}}$ = $193$ GeV and $200$ GeV, using a multistage framework. Model calculations for various configurations of $^{238}$U…

核理论 · 物理学 2024-06-17 Nicolas Fortier , Sangyong Jeon , Charles Gale

We study multi-particle azimuthal correlations in relativistic heavy-ion collisions at a center of mass energy of 200 GeV. We use the IP-Glasma model to initialize the viscous hydrodynamic simulation MUSIC and employ the UrQMD transport…

核理论 · 物理学 2019-04-17 Bjoern Schenke , Chun Shen , Prithwish Tribedy

Two-particle correlations play a pivotal role in understanding the space-time characteristics of particle emission in Heavy-ion collisions. These characteristics are typically represented by a relative emission source and can be obtained…

核理论 · 物理学 2025-06-03 Pierre Nzabahimana , Pawel Danielewicz , Giuseppe Verde

We develop a 1+1 dimensional hydrodynamical model for central heavy-ion collisions at ultrarelativistic energies. Deviations from Bjorken's scaling are taken into account by implementing finite-size profiles for the initial energy density.…

高能物理 - 唯象学 · 物理学 2008-11-26 L. M. Satarov , I. N. Mishustin , A. V. Merdeev , H. Stoecker

We have obtained a new set of parameters in a multiphase transport (AMPT) model that are able to describe both the charged particle multiplicity density and elliptic flow measured in Au+Au collisions at center of mass energy…

核理论 · 物理学 2011-07-21 Jun Xu , Che Ming Ko

Within the framework of the Lanzhou quantum molecular dynamics (LQMD) transport model, pion dynamics in heavy-ion collisions near threshold energies and the emission of preequilibrium particles (nucleons and light complex fragments) have…

核理论 · 物理学 2017-02-16 Zhao-Qing Feng

We explore theoretical uncertainties in the hydrodynamic description of relativistic heavy-ion collisions by examining the full non-linear causality conditions and quantifying the second-order transport coefficients' role on flow…

核理论 · 物理学 2021-06-09 Cheng Chiu , Chun Shen

At the early stage of heavy ion collisions, non-trivial topologies of the gauge fields can be created resulting in an imbalance of axial charge density and eventually separation of electric charges along the direction of the magnetic field…

核理论 · 物理学 2019-02-27 Sk Noor Alam , Subhasis Chattopadhyay

We study the collision energy dependence of elliptic flow v_2 and triangular flow v_3 in Au+Au collisions within the energy range sqrt(s_{NN}) = 5-200 GeV, utilizing a transport + hydrodynamics hybrid model. The transport part is described…

核理论 · 物理学 2014-04-11 Jussi Auvinen , Hannah Petersen

We report the first predictions of elliptic flow ($v_2$) of identified hadrons at mid-rapidity ($|y| <$ 1.0) in Au+Au collisions at $E_{lab} =$ 6.7, 8, 11, and 25 A GeV using the Parton Hadron String Dynamics (PHSD) model. The transverse…

高能物理 - 唯象学 · 物理学 2024-07-09 B. Towseef , M. Farooq , V. Bairathi , B. Waseem , S. Kabana , S. Ahmad

We report a measurement of low-mass electron pairs observed in 158 GeV/nucleon Pb-Au collisions. The pair yield integrated over the range of invariant masses 0.2 < m < 2.0 GeV is enhanced by a factor of 3.5 +/- 0.4 (stat) +/- 0.9 (syst)…

核实验 · 物理学 2015-06-26 NA45 Collaboration , G. Agakichiev et al