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arXiv 2004.06377nucl-th
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低温大化学势下强子相互作用引起的重子数涨落

Baryon number fluctuations induced by hadronic interactions at low temperature and large chemical potential

Guo-yun Shao, Xue-yan Gao, Wei-bo He

摘要:

本文研究了夸克-胶子等离子体~(QGP)强子化后低温大化学势下强子相互作用引起的密度涨落。我们分析了在临界温度以上的重子数峰度和偏度的结构,并阐述了它们与核液-气~(LG)相变和强子相互作用的关系。结合RHIC/NICA/FAIR/J-PARC/HIAF在碰撞能量为$200\,$ GeV到$1.8\,$ GeV范围内的相关实验项目,我们提出了峰度(偏度)随碰撞能量变化的双峰结构,可以用来识别手征相变和核液-气相变.特别是低温下的涨落分布为研究强子相互作用和核的液-气相变提供了一种新的方法。

英文摘要:

We investigate the density fluctuations induced by hadronic interactions at low temperatures and large chemical potentials after the hadronization of quark-gluon plasma~(QGP). We analyze the structures of net-baryon number kurtosis and skewness and elaborate on their relations with the nuclear liquid-gas~(LG) phase transition and hadronic interactions above the critical temperature. Combining with the relevant experimental projects at RHIC/NICA/FAIR/J-PARC/HIAF with collision energies from $200\,$GeV to $1.8\,$GeV, we propose a double-peak structure of kurtosis (skewness) as a function of collision energy, which can be taken to identify the chiral phase transition and the nuclear liquid-gas phase transition. In particular, the fluctuation distributions at low temperatures provide a new method to explore hadronic interactions and nuclear liquid-gas transition.

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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