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arXiv 1302.6624hep-exnucl-ex
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用ALICE实验确认LHC中Pb-Pb碰撞的带电强子产生

Identified charged hadron production in Pb-Pb collisions at the LHC with the ALICE Experiment

Leonardo Milano

摘要:

粒子光谱是理解高能重离子碰撞中产生的物质行为的重要工具。识别出的强子的横动量p_T分布包含了系统横向膨胀的信息,并约束了所产生物质的冻结性质。ALICE实验在较宽的p_T范围内具有良好的粒子识别性能。本文给出了在2.76 TeV质心能量下重离子碰撞中确定的π介子、K介子和质子的结果。这些结果进行了比较与其他确定的粒子测量得到以前的实验,并讨论了热和流体动力学的图片。还讨论了该分析的扩展状态,以及研究已识别粒子作为铅铅碰撞中逐个事件流的函数。

英文摘要:

Identified particle spectra represent a crucial tool to understand the behavior of the matter created in high-energy heavy-ion collisions. The transverse momentum p_T distributions of identified hadrons contain informations about the transverse expansion of the system and constrain the freezeout properties of the matter created. The ALICE experiment has good particle identification performance over a broad p_T range. In this contribution the results for identified pions, kaons and protons in heavy-ion collisions at 2.76 TeV center-of-mass energy are presented. These results are compared with other identified particle measurements obtained by previous experiments, and discussed in terms of the thermal and hydrodynamic pictures. The status of extensions of this analysis, with the study of identified particles as a function of event-by-event flow in Pb-Pb collisions, is also 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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