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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1404.3201nucl-exhep-ex
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在RHIC进行的PHENIX实验中,详细研究了Au+Au与高$p_T$探针碰撞产生的介质

Detail study of the medium created in Au+Au collisions with high $p_T$ probes by the PHENIX experiment at RHIC

Takao Sakaguchi

摘要:

介绍了PHENIX实验中Au+Au碰撞中高$p_T$识别强子的最新结果。发现$π^0$和$η$的$R_{\rm AA}$非常一致。测量了$π^0$的二阶和四阶集体流,发现$v_4/v_2^2$与在低$p_T$区观察到的一致。假设在最高$p_T$处$π^0$产额的抑制来自于部分子的能量损失,我们发现能量损失依赖于$L^3$,其中$L$是部分子在介质中的路径长度。计算了从39GeV Au+Au到2.76TeV Pb+Pb的高$p_T$强子的$δp_T/p_T$,发现它们的变化为6倍。我们已经看到了一个平稳的趋势,在$δp_T/p_T$从RHIC能量到LHC能量时,绘制对系统的带电多重性。

英文摘要:

Recent results on high $p_T$ identified hadrons in Au+Au collisions from the PHENIX experiment are presented. The $R_{\rm AA}$ for $π^0$ and $η$ are found to be very consistent. The second and fourth order collective flow of $π^0$s have been measured and found that $v_4/v_2^2$ is consistent with the one observed in lower $p_T$ region. Assuming the suppression of the $π^0$ yield at highest $p_T$ arises from energy loss of partons, we found that the energy loss is $L^3$ dependent, where $L$ is the path length of the partons in the medium. The $δp_T/p_T$'s of high $p_T$ hadrons are computed from 39GeV Au+Au over to 2.76TeV Pb+Pb, and found that they vary by a factor of six. We have seen a smooth trend in $δp_T/p_T$ from RHIC energy to LHC energy when plotting against charged multiplicity of the systems.

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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