| NUCLEAR PHYSICS |
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Elliptic Flow Splitting between Particles and their Antiparticles in Au+Au Collisions from a Multiphase Transport Model |
| Zhen-Yu Xu, Jian-Li Liu, Pan-Pan Zhang, Jing-Bo Zhang, Lei Huo** |
Department of Physics, Harbin Institute of Technology, Harbin 150001
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| Cite this article: |
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Zhen-Yu Xu, Jian-Li Liu, Pan-Pan Zhang et al 2017 Chin. Phys. Lett. 34 062501 |
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Abstract The elliptic flow $v_2$, for $\pi^\pm$, $K^\pm$, $p$ and $\bar {p}$ in Au+Au collisions at center-of-mass energies $\sqrt {s_{_{\rm NN}}}=7.7$, 11.5, 14.5 and 19.6 GeV, is analyzed using a multiphase transport model. A significant difference in the $v_2$ values for $p$ and $\bar {p}$ is observed, and the values of $v_2$ splitting are larger compared with $\pi^+$ and $\pi^-$, $K^+$ and $K^-$. The difference increases with decreasing the center-of-mass energy. The effect of the quark coalescence mechanism in a multi-phase transport model to the value of elliptic difference $\Delta v_2$ between $p$ and $\bar {p}$ has been discussed. The simulation of Au+Au collisions at 14.5 GeV shows that the effect of hadron cascade to $\Delta v_2$ is not obvious, and a larger parton-scattering cross section can lead to a larger $\Delta v_2$.
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Received: 20 January 2017
Published: 23 May 2017
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| PACS: |
25.75.Ld
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(Collective flow)
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25.75.-q
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(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
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25.75.Nq
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(Quark deconfinement, quark-gluon plasma production, and phase transitions)
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| Fund: Supported by the National Natural Science Foundation of China under Grant No U1332125, and the Program for Innovation Research of Science in Harbin Institute of Technology under Grant No B201408. |
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