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arXiv 1608.07903hep-ph
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修正的Nambu-Jona-Lasinio模型中守恒电荷的磁化率

Susceptibilities of Conserved Charges within a Modified Nambu-Jona-Lasinio Model

Wenkai Fan, Xiaofeng Luo, Hong-Shi Zong

摘要:

利用Nambu-Jona-Lasinio模型计算了不同温度和重子化学势下的$2$ nd到$4$ th阶重子、电荷和奇异数在手征临界点附近的极化率.重子数的不确定性被认为是最大的幅度,提供最强的信号。而奇异夸克质量大,奇异夸克势具有最小的发散控制面积。我们也尝试将我们的结果与实验数据进行比较。在高碰撞能量下,理论与实验结果一致。模型计算预测更复杂的行为在低碰撞能量,接近假设的临界终点。

英文摘要:

We evaluate the $2$nd to $4$th order baryon, charge and strangeness susceptibilities near a chiral critical point using the Nambu--Jona--Lasinio model under different temperature and baryon chemical potential. Baryon number susceptibilities are found to be of the greatest magnitude, offering the strongest signal. Whereas the strangeness susceptibilities have the smallest divergence dominating area, owing to the large strange quark mass. We also make an attempt to compare our results with experiment data. The trend at high collision energy are found to be consistent between theory and experiment. The model calculation predicts more complex behavior at low collision energies, near the postulated critical end point.

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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