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arXiv 1601.04409nucl-thhep-phnucl-ex
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多奇异强子在RHIC和LHC的质量序破坏

Violation of mass ordering for multi-strange hadrons at RHIC and LHC

Shiori Takeuchi, Koichi Murase, Tetsufumi Hirano, Pasi Huovinen, Yasushi Nara

摘要:

本文采用综合动力学方法研究了高能重离子碰撞中强子再散射对末态观测量的影响,特别是对多奇异强子$ϕ$,$Ξ$和$Ω$的影响.在这种方法中,(3+1)维理想流体力学相结合的微观传输模型,JAM。我们模拟了有或没有强子再散射的碰撞,并比较这两种选择之间的可观测量,以便量化强子再散射的影响。我们发现,多重奇异强子的平均横动量和椭圆流参数受强子再散射的影响较小,从而破坏了$p_T$ -微分椭圆流参数$v_2(p_T)$的质量有序性:在RHIC和LHC能区,$ϕ$ -介子的$v_2(p_T)$大于质子的$p_T$.

英文摘要:

We study effects of the hadronic rescattering on final observables especially for multi-strange hadrons such as $ϕ$, $Ξ$ and $Ω$ in high-energy heavy-ion collisions within an integrated dynamical approach. In this approach, (3+1)-dimensional ideal hydrodynamics is combined with a microscopic transport model, JAM. We simulate the collisions with or without hadronic rescatterings and compare observables between these two options so that we quantify the effects of the hadronic rescattering. We find that the mean transverse momentum and the elliptic flow parameter of multi-strange hadrons are less affected by hadronic rescattering and, as a result, the mass ordering of the $p_T$-differential elliptic flow parameter $v_2(p_T)$ is violated: At the RHIC and the LHC energies the $v_2(p_T)$ for $ϕ$-mesons is larger than that for protons in the low-$p_T$ regions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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