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arXiv 1507.04183hep-phnucl-th
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$K-π$相互作用的奇异涨落

Strangeness fluctuations from $K-π$ interactions

Bengt Friman, Pok Man Lo, Michał Marczenko, Krzysztof Redlich, Chihiro Sasaki

摘要:

受最近格点量子色动力学研究的启发,我们探讨了有限温度下强相互作用物质中相互作用对奇异涨落的影响。我们专注于S波$Kπ$散射和讨论的$K_0^*(800)$和$K^*(1430)$共振的作用。的相互作用的贡献内得到的S-矩阵制定的热力学,使用经验的$Kπ$相移作为输入。我们发现,在这个通道中的相互作用的简化处理,采用强子共振气体的方法,导致高估的奇异波动。因此,我们的计算表明,宽共振必须谨慎对待,在强子阶段的QCD热力学建模。

英文摘要:

Motivated by recent lattice QCD studies, we explore the effects of interactions on strangeness fluctuations in strongly interacting matter at finite temperature. We focus on S-wave $Kπ$ scattering and discuss the role of the $K_0^*(800)$ and $K^*(1430)$ resonances. The interaction contribution is obtained within the S-matrix formulation of thermodynamics, using the empirical $Kπ$ phase shifts as input. We find that the simplified treatment of the interactions in this channel, employed in the hadron resonance gas approach, leads to an overestimate of the strangeness fluctuations. Thus, our calculation indicates that broad resonances must be treated with caution, when modeling QCD thermodynamics in the hadronic phase.

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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