论文标题
手性动力学与排斥相互作用之间的相互作用
Interplay between chiral dynamics and repulsive interactions
论文作者
论文摘要
我们研究了热习惯物质中净 - 巴里昂数量密度的波动。我们讨论了手性动力学与排斥相互作用之间的相互作用及其对手性跨界这些波动的特性的影响。手性动力学是由平均双重拉格朗日（Doublet Lagrangian）建模的，该动力学分别结合了通过标量和矢量介子的交换介导的吸引力和排斥相互作用。使用平均场近似来解释手性临界。我们关注净 - 巴里昂数量密度的累积物的属性和系统，直到第六阶。结果表明，由于存在排斥相互作用，高阶累积物在手性相变的附近表现出很大的抑制。 We find, however, that the characteristic properties of cumulants near the chiral crossover observed in lattice QCD results are entirely linked to the critical chiral dynamics and, in general, cannot be reproduced in phenomenological models, which account only for effective repulsive interactions via excluded-volume corrections or van-der-Waals type interactions.因此，对手性跨界的净巴里元密度的高阶累积物的描述需要对手性中等效应和排斥相互作用的自洽治疗。
We investigate fluctuations of the net-baryon number density in hot hadronic matter. We discuss the interplay between chiral dynamics and repulsive interactions and their influence on the properties of these fluctuations near the chiral crossover. The chiral dynamics is modeled by the parity doublet Lagrangian that incorporates the attractive and repulsive interactions mediated via the exchange of scalar and vector mesons, respectively. The mean-field approximation is employed to account for chiral criticality. We focus on the properties and systematics of the cumulants of the net-baryon number density up to the sixth order. It is shown that the higher-order cumulants exhibit a substantial suppression in the vicinity of the chiral phase transition due to the presence of repulsive interactions. We find, however, that the characteristic properties of cumulants near the chiral crossover observed in lattice QCD results are entirely linked to the critical chiral dynamics and, in general, cannot be reproduced in phenomenological models, which account only for effective repulsive interactions via excluded-volume corrections or van-der-Waals type interactions. Consequently, a description of the higher-order cumulants of the net-baryon density in the chiral crossover requires a self-consistent treatment of the chiral in-medium effects and repulsive interactions.
