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arXiv 1106.5889nucl-exhep-ex
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在LHC用ALICE探测器测量夸克偶素产生

Quarkonium production measurements with the ALICE detector at the LHC

Ginés Martínez García

摘要:

在这个新的能量体系中,夸克偶素为研究高能重离子碰撞早期形成的高密度、强相互作用系统的性质提供了一个独特的探针。在ALICE中,夸克偶素态通过μ子谱仪中的μ + μ-衰变通道(2.5<y<4.0)和中心桶中的e+e-通道(|y| <0.9)重建到p_T=0。本文介绍了在sqrt{s}=2.76和7 TeV质子-质子碰撞中J/psi产生截面的横动量和快度分布的测量。我们将讨论在sqrt{s}=7 TeV的质子-质子碰撞中包含J/psi产额对带电粒子多重性的依赖性。最后,对sqrt{s_NN}=2.76 TeV的Pb-Pb碰撞中J/psi产生的分析进行了描述。本文还讨论了核修饰因子(R_AA)和中央至外周核修饰因子(R_CP)的初步结果。

英文摘要:

In this new energy regime, quarkonium provides a unique probe to study the properties of the high-density, strongly interacting system formed in the early stages of high-energy heavy-ion collisions. In ALICE, quarkonium states are reconstructed down to p_T=0 via their mu+mu- decay channel in the muon spectrometer (2.5<y<4.0) and via their e+e- channel in the central barrel (|y|<0.9). Measurement of the transverse momentum and rapidity distributions of inclusive J/psi production cross section in proton-proton collisions at sqrt{s}=2.76 and 7 TeV will be presented. We will discuss the dependence on charged particle multiplicity of the inclusive J/psi yield in proton-proton collisions at sqrt{s}=7 TeV. Finally, the analysis of the inclusive J/psi production in Pb-Pb collisions at sqrt{s_NN}=2.76 TeV will be described. Preliminary results on the nuclear modification factor (R_AA) and the central to peripheral nuclear modification factor (R_CP) will be discussed.

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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