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arXiv 1107.4737hep-ph
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强电磁场对均匀阿贝尔胶子场组态的QCD有效势的影响

Impact of the strong electromagnetic field on the QCD effective potential for homogeneous Abelian gluon field configurations

Bogdan V. Galilo, Sergei N. Nedelko

摘要:

计算了在强电磁场存在下,单圈夸克对均匀阿贝尔胶子场QCD有效势的贡献。分析了色电场、色磁场和电磁场夹角对势的极值结构的影响。在这个方案中,电磁场被认为是一个外部的,而胶子场代表域结构的非微扰胶子配置有关的QCD真空在禁闭阶段。两个特别有趣的胶子配置,(反)自对偶和交叉正交色磁和色电场,具体讨论。在这个简化的框架内,它表明,强电磁场可以发挥催化作用的解除禁闭过渡。在定性的层次上,本研究可以看作是相对论性重离子碰撞中产生的电磁场对强相互作用强子物质的影响的高度简化的研究。

英文摘要:

The one-loop quark contribution to the QCD effective potential for the homogeneous Abelian gluon field in the presence of external strong electromagnetic field is evaluated. The structure of extrema of the potential as a function of the angles between chromoelectric, chromomagnetic and electromagnetic fields is analyzed. In this setup, the electromagnetic field is considered as an external one while the gluon field represents domain structured nonperturbative gluon configurations related to the QCD vacuum in the confinement phase. Two particularly interesting gluon configurations, (anti-)self-dual and crossed orthogonal chromomagnetic and chromoelectric fields, are discussed specifically. Within this simplified framework it is shown that the strong electromagnetic fields can play a catalysing role for a deconfinement transition. At the qualitative level, the present consideration can be seen as a highly simplified study of an impact of the electromagnetic fields generated in relativistic heavy ion collisions on the strongly interacting hadronic matter.

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