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arXiv 1202.1383hep-exnucl-ex
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在$\sqrt{s_{\rm NN}}$ = 2.76 TeV时Pb-Pb碰撞前向快度J/ $ψ$抑制

J/$ψ$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV

ALICE Collaboration

摘要:

ALICE实验在快度范围$2.5 < y < 4$内测量了从$\sqrt{s_{\mathrm{NN}} } = 2.76$ TeV到零横动量的Pb-Pb碰撞中J/ $ψ$的产生。相对于由二元核子-核子碰撞的数量标度的pp碰撞中测量的J/ $ψ$产额,观察到Pb-Pb中包含的J/ $ψ$产额的抑制。在0-80%的最中心碰撞上积分的核修饰因子为$0.545 \pm 0.032 \rm{(stat.)} \pm 0.083 \rm{(syst.)}$,并且不表现出对碰撞中心性的显著依赖性。这些功能出现显着不同的测量在较低的碰撞能量。包含粲夸克J/ $ψ$产生的模型可以描述我们的数据。

英文摘要:

The ALICE experiment has measured the inclusive J/$ψ$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}} } = 2.76$ TeV down to zero transverse momentum in the rapidity range $2.5 < y < 4$. A suppression of the inclusive J/$ψ$ yield in Pb-Pb is observed with respect to the one measured in pp collisions scaled by the number of binary nucleon-nucleon collisions. The nuclear modification factor, integrated over the 0-80% most central collisions, is $0.545 \pm 0.032 \rm{(stat.)} \pm 0.083 \rm{(syst.)}$ and does not exhibit a significant dependence on the collision centrality. These features appear significantly different from measurements at lower collision energies. Models including J/$ψ$ production from charm quarks in a deconfined partonic phase can describe our data.

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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