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The STAR beam energy scan phase II physics and upgrades

机译:星光束能量扫描阶段II物理和升级

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摘要

The second phase of the Beam Energy Scan at RHIC, BPS-II, is scheduled for 2019-2020 and will explore with precision measurements the high baryon density region of the QCD phase diagram. The program will examine the energy region of interest determined from the results of BES-I. Some of the key measurements anticipated are: the net-protons kurtosis that could pinpoint the position of a critical point, the directed flow that might prove a softening of the EOS, and the chiral restoration in the dilepton channel. The measurements will be possible with the order of magnitude better statistics provided by the electron cooling upgrade of RHIC and with the detector upgrades planned to extend STAR's experimental reach. The upgrades are: the inner TPC sectors (iTPC), the Event Plane Detector (EPD), and the end -cap TOF (eTOF). We present the BES-II program details and the physics opportunities enabled by these upgrades.
机译:在RHIC,BPS-II处的光束能量扫描的第二阶段被调度2019 - 201020,并探讨精度测量QCD相图的高压孔密度区域。 该计划将研究从BES-I的结果确定的利息区域。 预计的一些关键测量值是:净质子kurtosis可以针对临界点的位置,这可能证明EOS软化的定向流以及Dilepton信道中的手性恢复。 测量值是可以通过RAC的电子冷却升级提供的更好统计量,并计划延长明星的实验范围的探测器升级。 升级是:内部TPC扇区(ITPC),事件平面检测器(EPD)和终端-CAP TOF(ETOF)。 我们介绍了这些升级的BES-II计划细节和物理机会。

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