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arXiv · 0810.5162

CP violation and chiral symmetry restoration in the hot linear sigma model in a strong magnetic background

Ana Júlia Mizher·Eduardo S. Fraga
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Abstract

We study the effects of CP violation on the nature of the chiral transition within the linear sigma model with two flavors of quarks. The finite-temperature effective potential containing contributions from nontrivial values for the parameter $θ$ is computed to one loop order and their minima structure is analyzed. Motivated by the possibility of observing the formation of CP-odd domains in high-energy heavy ion collisions, we also investigate the behavior of the effective potential in the presence of a strong magnetic background. We find that the nature of the chiral transition is influenced by both $θ$ and the magnetic field.

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Ana Júlia Mizher, Eduardo S. Fraga. 2008-10-28. CP violation and chiral symmetry restoration in the hot linear sigma model in a strong magnetic background. https://doi.org/10.1016/j.nuclphysa.2009.09.004

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