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arXiv 1612.02499nucl-ex
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用STAR实验测量$\rm p$ + $\rm p$和$\rm Au$ + $\rm Au$碰撞中的夸克偶素

Quarkonium measurements via the di-muon decay channel in $\rm p$+$\rm p$ and $\rm Au$+$\rm Au$ collisions with the STAR experiment

Takahito Todoroki

摘要:

我们提出的第一个$J/ψ$和$Υ$测量中快度的双μ子衰变通道在RHIC使用新安装的μ子望远镜探测器。在$\sqrt{s}=500$ ~GeV的p-$+$-p碰撞中,包含的$J/ψ$截面可用CGC+NRQCD和NLO-NRQCD模型对$0<p_T<20$ ~GeV/ $c$进行计算.在金$+$金碰撞在$\sqrt{s_{NN}}=200$ ~GeV,我们观察到(i)明确$J/ψ$抑制表明解离;(ii)$J/ψ$ $R_{AA}$可以定性地描述的运输模型,包括解离和再生的张力在高$p_T$ ;和(iii)暗示较少熔化的$Υ(2S+3S)$相对于$Υ(1S)$在RHIC相比,在LHC。

英文摘要:

We present the first $J/ψ$ and $Υ$ measurements in the di-muon decay channel at mid-rapidity at RHIC using the newly installed Muon Telescope Detector. In p$+$p collisions at $\sqrt{s}=500$~GeV, inclusive $J/ψ$ cross section can be described by CGC+NRQCD and NLO NRQCD model calculations for $0<p_T<20$~GeV/$c$. In Au$+$Au collisions at $\sqrt{s_{NN}}=200$~GeV, we observe (i) clear $J/ψ$ suppression indicating dissociation; (ii) $J/ψ$ $R_{AA}$ can be qualitatively described by transport models including dissociation and regeneration with a tension at high $p_T$; and (iii) hint of less melting of $Υ(2S+3S)$ relative to $Υ(1S)$ at RHIC compared to that at LHC.

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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