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arXiv 0907.4742nucl-ex
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BRAHMS的概述和最新结果

Overview and Recent Results from BRAHMS

F. Videbaek

摘要:

BRAHMS实验的目的是测量和表征重离子碰撞中粒子产生的快度依赖特性。数据采集已经结束,几年的分析结果已经公布,并证明了快度依赖性的几个重要特征,这是RHIC计划开始时没有设想过的。在高快度下形成的系统的整体性质类似于在中快度下较低能量下的系统的整体性质,当通过重子化学势参考时。新的物理学在AA中基本上是在中快度观察到的,包括高\pT抑制是终态效应的证明。另一个关键的结果是,在d+A碰撞中,在探测原子核的非常低x区域时,观察到π介子产生的强烈抑制,这与胶子饱和的图像一致。最新的结果检查的中心性和快度依赖的核停止,粒子生产的π介子,集体膨胀与快度,和重子增强在中间值的\pT。

英文摘要:

The BRAHMS experiment was designed to measure and characterize in particular the properties of rapidity dependence of particle production in heavy ion collisions. The data-taking is now over, results of several years of analysis have been published and demonstrates several important features of the rapidity dependence, not envisioned from the start of the RHIC program. The bulk properties of the system formed at high rapidity resemble that of systems at lower energies at mid-rapidity when referenced via the baryo-chemical potential. New physics in AA are essentially observed at mid-rapidity including the demonstration that high-\pT suppression is a final state effect. Another key result is that in d+A collisions at forward rapidities where the very low-x region of the nucleus was probed, a strong suppression of pion production was observed consistent with the picture of gluon saturation. The latest results examines the centrality and rapidity dependence of nuclear stopping, the particle production of pions, collective expansion vs. rapidity, and the baryon enhancement at intermediate values of \pT .

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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