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arXiv 1303.7260nucl-exhep-ex
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在STAR上测量与束流能量有关的核修改因子

Measurement of beam energy dependent nuclear modification factors at STAR

Stephen P. Horvat

摘要:

核修正因子R_{AA}和R_{CP}已被用于测量sqrt{ s_{NN} } = 200 GeV重离子碰撞中的介质诱导抑制,这是强相互作用介质夸克-胶子等离子体(QGP)存在的最早证据之一。非对称碰撞的核修正因子(R_{dA})测量了克罗宁效应,相对于质子-质子碰撞,氘-金碰撞中高横向动量粒子产额的增强。类似的增强在这些程序中提出的数据中观察到,并与QGP中部分子能量损失引起的淬火竞争。在这些论文中,我们将介绍在中快度(sqrt{ s_{NN} } = 7.7 - 62.4 GeV)下的带电强子R_{CP},以及确定的π ^{+}、K^{+}和质子R_{CP}。与HIJING的比较激发了解开对核横动量谱的竞争性修改的可能方法。

英文摘要:

The nuclear modification factors R_{AA} and R_{CP} have been used to measure medium-induced suppression in heavy-ion collisions at sqrt{s_{NN}} = 200GeV which was among the earliest evidence for the existence of a strongly interacting medium called a quark-gluon plasma (QGP). Nuclear modification factors for asymmetric collisions (R_{dA}) have measured the Cronin Effect, an enhancement of high transverse momentum particle yields in deuteron-gold collisions relative to proton-proton collisions. A similar enhancement is observed in data presented in these proceedings and competes with the quenching caused by partonic energy loss in the QGP. In these proceedings we will present charged-hadron R_{CP} at mid-rapidity for sqrt{s_{NN}} = 7.7 - 62.4GeV as well as identified pi^{+}, K^{+}, and proton R_{CP}. Comparisons to HIJING motivate possible methods for disentangling competing modifications to nuclear transverse momentum spectra.

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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