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arXiv 1111.5155hep-lathep-ph
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外磁场中的有限温度QCD相变

The finite temperature QCD transition in external magnetic fields

G. S. Bali, F. Bruckmann, G. Endrodi, Z. Fodor, S. D. Katz, S. Krieg, A. Schafer, K. K. Szabo

摘要:

研究了外加磁场对QCD有限温度跃迁的影响。我们测量了夸克凝聚、夸克磁化率和奇异夸克数磁化率等热力学观测量。我们在不同的量子化磁通量值下产生了N_f=2+1的物理夸克质量的粗涂交错夸克的组态。我们对观测量进行了重整化,并在N_t= 6,8和10格点上逼近了连续极限。我们还检查有限体积效应使用各种晶格体积。我们的主要结果是,转变温度随着磁场的增大而显著降低,并且直到我们的最大外场eB ~ 1 GeV ^2时,转变仍然是一个解析交叉。

英文摘要:

The effect of an external magnetic field on the finite temperature transition of QCD is studied. We measure thermodynamic observables including the quark condensates and susceptibilities and the strange quark number susceptibility. We generate configurations at various values of the quantized magnetic flux with N_f=2+1 flavors of stout smeared staggered quarks at physical quark masses. We perform the renormalization of our observables and approach the continuum limit with N_t=6,8 and 10 lattices. We also check finite volume effects using various lattice volumes. Our main result is that the transition temperature significantly decreases with growing magnetic field, and that the transition remains an analytic crossover up to our largest external field eB ~ 1 GeV^2.

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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