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arXiv 0910.2128hep-ph
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统计模型与介子-重子过渡区

Statistical Model and the mesonic-baryonic transition region

H. Oeschler, J. Cleymans, K. Redlich, S. Wheaton

摘要:

假设化学平衡和局域奇异性守恒的统计模型描述了从SIS到RHIC的奇异粒子产生的大部分观测特征。发现偏差,因为测得的K+/pi+比的最大值比模型计算的更尖锐。统计模型表明,在最大入射能量下,冻结将使较低能量下的重子主导区转变为介子主导区。它将显示从通常的冻结曲线的偏差如何影响各种颗粒比。此外,其他观测量也仅在此能量范围内表现出变化。

英文摘要:

The statistical model assuming chemical equilibriumand local strangeness conservation describes most of the observed features of strange particle production from SIS up to RHIC. Deviations are found as the maximum in the measured K+/pi+ ratio is much sharper than in the model calculations. At the incident energy of the maximum, the statistical model shows that freeze out changes regime from one being dominated by baryons at the lower energies toward one being dominated by mesons. It will be shown how deviations from the usual freeze-out curve influence the various particle ratios. Furthermore, other observables exhibit also changes just in this energy regime.

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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