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arXiv 1502.05650nucl-thhep-ph
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具有精确奇异数守恒的核-核碰撞早期统计模型

Statistical Model of the Early Stage of nucleus-nucleus collisions with exact strangeness conservation

R. V. Poberezhnyuk, M. Gazdzicki, M. I. Gorenstein

AI总结:

本文将描述核-核碰撞中禁闭到退禁闭转变的SMES扩展为包含精确奇异数守恒,以适用于奇异粒子平均多重数小于一的p+p相互作用。

摘要:

早期统计模型(Statistical Model of the Early Stage,SMES)描述了核-核碰撞中产生的强相互作用物质在禁闭相和退禁闭相之间的转变。该模型于20世纪90年代末提出,用于CERN SPS能量下的中心Pb+Pb碰撞。它预测了该转变(退禁闭开始)的若干信号,这些信号后来被NA49实验观测到。巨正则系综曾被用于计算熵和奇异数产生。这一近似对于携带守恒荷的粒子平均数显著大于一的反应是有效的。NA61/SHINE关于非弹性p+p相互作用中强子产生的最新结果表明,退禁闭也可能发生在这些反应中。然而,在这种情况下,具有非零奇异荷的粒子平均数小于一。因此,为了对p+p相互作用进行建模,必须在SMES中实施精确奇异数守恒。本文介绍了SMES的这一扩展。

英文摘要:

The Statistical Model of the Early Stage, SMES, describes a transition between confined and deconfined phases of strongly interacting matter created in nucleus-nucleus collisions. The model was formulated in the late 1990s for central Pb+Pb collisions at the CERN SPS energies. It predicted several signals of the transition (onset of deconfinement) which were later observed by the NA49 experiment. The grand canonical ensemble was used to calculate entropy and strangeness production. This approximation is valid for reactions with mean multiplicities of particles carrying conserved charges being significantly larger than one. Recent results of NA61/SHINE on hadron production in inelastic p+p interactions suggest that the deconfinement may also take place in these reactions. However, in this case mean multiplicity of particles with non-zero strange charge is smaller than one. Thus for the modeling of p+p interactions the exact strangeness conservation has to be implemented in the SMES. This extension of the SMES is presented in the paper.

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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