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arXiv 1810.02504hep-phhep-th
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手征相变的熵产生和再加热

Entropy production and reheating at the chiral phase transition

Christoph Herold, Apiwit Kittiratpattana, Chinorat Kobdaj, Ayut Limphirat, Yupeng Yan, Marlene Nahrgang, Jan Steinheimer, Marcus Bleicher

摘要:

我们研究了非平衡手征相变中熵的产生。动力学对称性破缺是由一个朗之万方程的序参量耦合到夸克等离子体的Bjorken动力学。我们调查耗散和噪声对熵的影响,并探讨重新加热的可能性交叉和一阶相变,这取决于流体的膨胀率。在S/N的相对增加的范围估计为从10%的交叉到200%的一阶相变在低束能量,这可以检测到的π-质子比作为束能量的函数。

英文摘要:

We study the production of entropy in the context of a nonequilibrium chiral phase transition. The dynamical symmetry breaking is modeled by a Langevin equation for the order parameter coupled to the Bjorken dynamics of a quark plasma. We investigate the impact of dissipation and noise on the entropy and explore the possibility of reheating for crossover and first-order phase transitions, depending on the expansion rate of the fluid. The relative increase in S/N is estimated to range from 10% for a crossover to 200% for a first-order phase transition at low beam energies, which could be detected in the pion-to-proton ratio as a function of beam energy.

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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