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

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

2008-10-28

arxiv.org/abs/0810.5162v1

Nucl.Phys.A831:91-105,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 9 figures

Scientific paper

10.1016/j.nuclphysa.2009.09.004

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 $\theta$ 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 $\theta$ and the magnetic field.

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