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arXiv 1201.0729nucl-ex
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用ALICE探测器研究pp和Pb-Pb碰撞中的包容性开粲产生

Inclusive Open Charm Production in pp and Pb-Pb collisions with the ALICE Detector

Renu Bala

摘要:

ALICE是LHC的重离子实验。它的主要物理目标是研究强相互作用物质在高能量密度(>10 GeV/ fm^3)和高温(> 0.5 GeV)条件下的性质,这在中心铅-铅碰撞中有望达到。魅夸克和美夸克是研究这种高密度和强相互作用物质状态的有力工具,因为它们是在初始硬散射中产生的,因此在系统演化的早期产生,并探测其最热、最致密的阶段。pp碰撞中粲产生截面的测量为QCD过程提供了一个有趣的视角,对重离子研究具有重要的参考价值。本文测量了\sqrt{s} = 7 TeV和\sqrt{s} =2.76 TeV的pp碰撞中心快度区的开粲截面.此外,还首次测量了在\sqrt{s} = 2.76 TeV的Pb-Pb碰撞中D介子的核修正因子.

英文摘要:

ALICE is the dedicated heavy-ion experiment at the LHC. Its main physics goal is to study the properties of strongly-interacting matter at conditions of high energy density (>10 GeV/ fm^3) and high temperature (> 0.5 GeV) expected to be reached in central Pb-Pb collisions. Charm and beauty quarks are powerful tools to investigate this high density and strongly interacting state of matter since they are produced in initial hard scatterings that are therefore generated early in the system evolution and probe its hottest, densest stage. The measurement of the charm production cross sections in pp collisions provides an interesting insight into QCD processes and is crucial as a reference for heavy ion studies. We present open charm cross section measurements in pp collisions at \sqrt{s} = 7 TeV and \sqrt{s}=2.76 TeV in the central rapidity region. In addition, the first measurement of nuclear modification factor of D-meson in Pb-Pb collisions at \sqrt{s}= 2.76 TeV is shown.

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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