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arXiv 1302.1833nucl-ex
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来自BNL-RHIC-2012的亮点

Highlights from BNL-RHIC-2012

M. J. Tannenbaum

摘要:

本文以2005年在美国布鲁克海文国家实验室和相对论重离子对撞机(RHIC)上发现的强相互作用夸克-胶子等离子体(sQGP)为背景,回顾和讨论了最近的一些重要进展,并得到了CERN LHC Pb+Pb计划的证实。2012年,具有三维随机冷却和新EBIS离子源的RHIC机器运行出色,能够测量Cu+Au,U+U,其中显示了多重性分布,以及极化p-p碰撞。讨论了p-p和A+A的物理和目标的差异,导致审查的RHIC结果的pi 0抑制在Au+Au碰撞和比较LHC Pb+Pb的结果在相同的范围5<pT<20 GeV。RHIC Au+Au能量扫描的结果表明,高pT抑制取代了c.m.的“克罗宁效应”。能量> 30 GeV。显示了RHIC直接光子产生和与带电粒子相关性的改进测量,包括d+Au碰撞中不存在低pT(热)光子增强。本文讨论了在RHIC和LHC上通过直接测量魅粒子和美粒子来理解QGP中轻夸克和重夸克能量损失的表观相等性的尝试。

英文摘要:

Recent highlights from Brookhaven National Laboratory and the Relativistic Heavy Ion Collider (RHIC) are reviewed and discussed in the context of the discovery of the strongly interacting Quark Gluon Plasma (sQGP) at RHIC in 2005 as confirmed by results from the CERN-LHC Pb+Pb program. Outstanding RHIC machine operation in 2012 with 3-dimensional stochastic cooling and a new EBIS ion source enabled measurements with Cu+Au, U+U, for which multiplicity distributions are shown, as well as with polarized p-p collisions. Differences of the physics and goals of p-p versus A+A are discussed leading to a review of RHIC results on pi0 suppression in Au+Au collisions and comparison to LHC Pb+Pb results in the same range 5<pT<20 GeV. Results of the RHIC Au+Au energy scan show that high pT suppression takes over from the "Cronin Effect" for c.m. energies > 30 GeV. Improved measurements of direct photon production and correlation with charged particles at RHIC are shown, including the absence of a low pT (thermal) photon enhancement in d+Au collisions. Attempts to understand the apparent equality of the energy loss of light and heavy quarks in the QGP by means of direct measurements of charm and beauty particles at both RHIC and LHC are 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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