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arXiv 2307.16633hep-phhep-exnucl-exnucl-th
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具有固定多重数约束的量子局域平衡态与玻色-爱因斯坦动量关联

Quantum local-equilibrium state with fixed multiplicity constraint and Bose-Einstein momentum correlations

M. D. Adzhymambetov, S. V. Akkelin, Yu. M. Sinyukov

AI总结:

本文在固定粒子数约束的量子局域平衡正则系综中推导单、双玻色子动量谱,发现双粒子动量关联函数对固定多重数约束的敏感性显著强于单粒子谱,为解释LHC能区p+p碰撞的多重数依赖测量提供理论依据。

摘要:

在具有固定粒子数约束的非相互作用玻色子的量子局域平衡正则系综中,推导了单玻色子和双玻色子动量谱。我们将正则系综定义为与巨正则系综相关联的事件子系综。采用简单的流体动力学启发的参数化方案,参数值大致对应于LHC能量下p+p碰撞中系统解体的数值,我们将研究结果与基于巨正则系综的处理进行比较,其中平均粒子数与正则系综中的固定粒子数一致。我们观察到,与单粒子动量谱相比,双粒子动量关联函数对固定多重数约束的敏感性显著更强。我们的分析结果可能有助于解释p+p碰撞事件的多重数依赖测量。

英文摘要:

The one- and two-boson momentum spectra are derived in the quantum local-equilibrium canonical ensemble of noninteracting bosons with a fixed particle number constraint. We define the canonical ensemble as a subensemble of events associated with the grand-canonical ensemble. Applying simple hydro-inspired parametrization with parameter values that correspond roughly to the values at the system's breakup in $p+p$ collisions at the LHC energies, we compare our findings with the treatment which is based on the grand-canonical ensembles where mean particle numbers coincide with fixed particle numbers in the canonical ensembles. We observe a significantly greater sensitivity of the two-particle momentum correlation functions to fixed multiplicity constraint compared to one-particle momentum spectra. The results of our analysis may be useful for interpretation of multiplicity-dependent measurements of $p+p$ collision events.

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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