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Predictions for 5.023 TeV Pb + Pb collisions at the CERN Large Hadron Collider

机译:CERN大型HADRON COLLIDER的5.023 TEV PB + PB碰撞的预测

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摘要

We compute predictions for various low-transverse-momentum bulk observables in root s(NN) = 5.023 TeV Pb+Pb collisions at the CERN Large Hadron Collider (LHC) from the event-by-event next-to-leading-order perturbative-QCD + saturation + viscous hydrodynamics ("EKRT") model. In particular, we consider the centrality dependence of charged hadron multiplicity, flow coefficients of the azimuth-angle asymmetries, and correlations of event-plane angles. The centrality dependencies of the studied observables are predicted to be very similar to those at 2.76 TeV, and the magnitudes of the flow coefficients and event-plane angle correlations are predicted to be close to those at 2.76 TeV. The flow coefficients may, however, offer slightly more discriminating power on the temperature dependence of QCD matter viscosity than the 2.76 TeV measurements. Our prediction for the multiplicity in the 0-5 % centrality class, obtained using the two temperature-dependent shear-viscosity-to-entropy ratios that give the best overall fit to BNL Relativistic Heavy Ion Collider (RHIC) and LHC data is dN(ch)/d eta vertical bar(vertical bar eta vertical bar <= 0.5) = 1876 . . . 2046. We also predict a power-law increase from 200 GeV Au+Au collisions at RHIC to 2.76 and 5.023 TeV Pb+Pb collisions at the LHC, dN(ch)/d eta vertical bar(vertical bar eta vertical bar <= 0.5) proportional to s(0.164...0.174).
机译:我们在Cern Light Hodron Coller(LHC)中的根部(NN)= 5.023 TEV PB + PB碰撞中的各种低横向动量批量可观察到的预测从逐个事件下一到领先的扰动 - QCD +饱和+粘性流体动力学(“EKRT”)模型。特别地,我们考虑带电的强子多重,方位角不对称的流量系数的中心依赖性,以及事件平面角度的相关性。预测所研究的可观察到的中心依赖性与2.76 Tev的那些非常相似,并且预测流量系数和事件平面角度相关的大小将接近2.76 Tev。然而,流量系数可以在QCD物质粘度的温度依赖性上提供比2.76 Tev测量值更高的辨别力。我们对0-5%中心等级中的多重性的预测,使用两个温度依赖性剪切粘度到熵比获得,所述抗粘性到熵比率给出最佳整体拟合到BNL相对论的重离子撞机(RHIC)和LHC数据是DN( CH)/ D ETA垂直条(垂直条ETA垂直条<= 0.5)= 1876。 。 。 2046.我们还预测了在LHC,DN(CH)/ D ETA垂直条(垂直条ETA垂直条<= 0.5 )与s成比例(0.164 ... 0.174)。

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  • 来源
    《Physical review, C》 |2016年第1期|共8页
  • 作者单位

    Goethe Univ Frankfurt Inst Theoret Phys Max von Laue Str 1 D-60438 Frankfurt Germany;

    Univ Jyvaskyla Dept Phys POB 35 FI-40014 Jyvaskyla Finland;

    Univ Santiago de Compostela Dept Fis Particulas E-15782 Santiago De Compostela Galicia Spain;

    Univ Jyvaskyla Helsinki Inst Phys POB 64 FI-40014 Jyvaskyla Finland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
  • 关键词

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