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arXiv 1807.01673hep-lathep-phhep-th
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强磁场对QCD磁通管的影响

Effects of a strong magnetic field on the QCD flux tube

Claudio Bonati, Salvatore Calì, Massimo D'Elia, Michele Mesiti, Francesco Negro, Andrea Rucci, Francesco Sanfilippo

摘要:

本工作采用N_f=2+1的具有物理质量的Stout改进动力学交错夸克模型,通过格点模拟研究了外加磁场B对QCD中通量管形状的影响。在讨论了B=0时磁通管的实际定义中的一些困难之后,我们证明了这些模糊性并不影响由磁场引起的磁通管修改的确定。根据磁通量管和磁场的相对取向得到不同的结果:它们证实了磁场作为横向约束催化剂和纵向约束抑制剂;此外,磁通量管本身失去了它的轴对称性时,它不是沿着磁背景。

英文摘要:

In this work we investigate the effect of an external magnetic field B on the shape of flux tubes in QCD by means of lattice simulations, performed with N_f=2+1 flavors of stout improved dynamical staggered quarks with physical masses. After having discussed some difficulties in the practical definition of the flux tube at B=0, we show that these ambiguities do not affect the determination of the flux tube modifications induced by the magnetic field. Different results are obtained depending on the relative orientations of the flux tube and of the magnetic field: they confirm that the magnetic field acts as transverse confinement catalyser and longitudinal confinement inhibitor; moreover, the flux tube itself loses its axial symmetry when it is not directed along the magnetic background.

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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