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首页> 外文期刊>Physical review, C >Hadron yields and fluctuations at energies available at the CERN Super Proton Synchrotron: System-size dependence from Pb plus Pb to p plus p collisions
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Hadron yields and fluctuations at energies available at the CERN Super Proton Synchrotron: System-size dependence from Pb plus Pb to p plus p collisions

机译：Cern Super Proton Synchrotron提供的Holron产量和能量的波动：系统尺寸从PB Plus PB到P Plus P Plus P碰撞

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摘要

The kaon-to-pion ratio K+/pi(+) and the scaled variance omega(-) for fluctuations of negatively charged particles are studied within the statistical hadron resonance gas (HRG) model and the ultrarelativistic quantum molecular dynamics (UrQMD) transport model. The calculations are done for p + p, Be + Be, Ar + Sc, and Pb + Pb collisions at the CERN Super Proton Synchrotron energy range to reveal the system-size dependence of hadron production. For the HRG calculations the canonical ensemble is imposed for all conserved charges. In the UrQMD simulations the centrality selection in nucleus-nucleus collisions is done by calculating the forward energy E-F deposited in the Projectile Spectator Detector, and the acceptance maps of the NA61/SHINE detectors are used. The HRG and UrQMD results are compared with the data of the NA61/SHINE Collaboration. To understand the difference in the event-by-event fluctuations in p + p and heavy-ion collisions, the centrality-selection procedure in the sample of all inelastic p + p events is proposed and analyzed within the UrQMD simulations.
机译：在统计强子共振气体（HRG）模型中，研究了用于带负电颗粒的波动波动的KaOn-to-pion比率K + / Pi（+）和缩放方差ω（ - ）和超弧度量子分子动力学（URQMD）运输模型。 CERS Super Proton Synchrotron能量范围内的P + P，BE +，AR + SC和PB + PB碰撞完成计算，以揭示强子生产的系统尺寸依赖性。对于HRG计算，对所有保守费用施加了规范集合。在URQMD仿真中，通过计算凹陷的观察者检测器中沉积的前向能量E-F来完成核心碰撞中的中心选择，并且使用NA61 /闪耀探测器的验收图。将HRG和URQMD结果与NA61 / Shine Conclation的数据进行比较。为了了解P + P和重离子碰撞中的逐个事件波动的差异，提出并在URQMD模拟中提出并分析了所有无弹性P + P事件的样本中的中心选择过程。

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