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arXiv 1902.09322hep-phhep-latnucl-th
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热 QCD 中的涨落与关联

Fluctuations and correlations in thermal QCD

E. Megias, E. Ruiz Arriola, L. L. Salcedo

AI总结:

本文利用 Hadron Resonance Gas 模型研究热 QCD 的状态方程及电荷、重子数、奇异数涨落与关联,并结合夸克–双夸克模型探讨强子谱缺失态及零温奇点。

摘要:

我们通过考虑 Hadron Resonance Gas(强子共振气体)模型在 QCD 轻味区段的一种实现,研究了状态方程,以及电荷、重子数和奇异数的涨落与静态关联子。我们强调,在该方法内,这些可观测量对于研究强子谱中可能存在的奇异态和缺失态具有重要意义。我们在一个相对论性夸克–双夸克模型中获得了重子谱的一些初步结果,这些结果与采用其他夸克模型得到的谱总体上吻合良好。最后,在 Hadron Resonance Gas 方法内,我们推测关联子在零温下存在一个奇点,该奇点类似于配分函数在 Hagedorn 温度处的发散。

英文摘要:

We study the equation of state, fluctuations and static correlators of electric charge, baryon number and strangeness, by considering a realization of the Hadron Resonance Gas model in the light flavor sector of QCD. We emphasize the importance of these observables to study, within this approach, the possible existence of exotic and missing states in the hadron spectrum. Some preliminary results for the baryon spectrum have been obtained within a relativistic quark-diquark model, leading to an overall good agreement with the spectrum obtained with other quark models. Finally, it is conjectured, within the Hadron Resonance Gas approach, the existence of a singularity in the correlators at zero temperature, which turns out to be analogous to the divergence of the partition function at the Hagedorn temperature.

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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