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arXiv 0811.1571nucl-thhep-phhep-th
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$T_c$附近强子物质的输运系数

Transport Coefficients of Hadronic Matter near $T_c$

Jacquelyn Noronha-Hostler, Jorge Noronha, Carsten Greiner

摘要:

一个强子共振气体模型包括所有已知的粒子和共振质量$m<2$ GeV和一个指数上升的密度的Hagedorn状态的$m>2$ GeV的强子共振气体模型被用来获得上界的剪切粘度熵密度比,$η/s\approx1/(4π)$,强子物质附近的$T_c$。我们在$T_c$附近发现了一个大的迹线异常和小的声速,这与最近的晶格计算结果吻合得很好。我们评论的体积粘度熵密度比接近$T_c$。

英文摘要:

A hadron resonance gas model including all known particles and resonances with masses $m<2$ GeV and an exponentially rising density of Hagedorn states for $m>2$ GeV is used to obtain an upper bound on the shear viscosity to entropy density ratio, $η/s\approx1/(4π)$, of hadronic matter near $T_c$. We found a large trace anomaly and small speed of sound near $T_c$, which agree well with recent lattice calculations. We comment on the bulk viscosity to entropy density ratio close to $T_c$.

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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