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arXiv 2011.06635nucl-thhep-ph
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相对论密度泛函状态方程下强子输运的相变和临界行为

Phase transitions and critical behavior in hadronic transport with a relativistic density functional equation of state

Agnieszka Sorensen, Volker Koch

摘要:

我们开发了一个灵活的,相对论协变参数化的致密核物质状态方程适合列入计算要求苛刻的强子输运模拟。在强子输运代码SMASH的实施,我们表明,由于批量热力学行为的影响,在动态强子系统中再现,表明强子输运可用于研究致密核物质的临界行为,无论是在和远离平衡。我们还表明,从强子输运模拟数据计算的两粒子关联遵循理论预期的基础上的二阶累积量比,并构成一个明确的签名跨越相图的临界点以上。

英文摘要:

We develop a flexible, relativistically covariant parameterization of dense nuclear matter equation of state suited for inclusion in computationally demanding hadronic transport simulations. Within an implementation in the hadronic transport code SMASH, we show that effects due to bulk thermodynamic behavior are reproduced in dynamic hadronic systems, demonstrating that hadronic transport can be used to study critical behavior in dense nuclear matter, both at and away from equilibrium. We also show that two-particle correlations calculated from hadronic transport simulation data follow theoretical expectations based on the second order cumulant ratio, and constitute a clear signature of crossing the phase diagram above the critical point.

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