The effect of an imaginary part of the Schwinger-Dyson equation at finite temperature and density

Details The effect of an imaginary part of the Schwinger-Dyson equation at finite temperature and density The effect of an imaginary part of the Schwinger-Dyson equation at finite temperature and density

2011-06-22

arxiv.org/abs/1106.4379v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 14 figures

Scientific paper

We examined the effect of an imaginary part of the ladder approximation Schwinger-Dyson equation. We show the imaginary part enhances the effect of the first order transition, and affects a tricritical point. In particular, a chemical potential at a tricritical point is moved about 200(MeV). Thus, one should not ignore the imaginary part. On the other hand, since an imaginary part is small away from a tricritical point, one should be able to ignore an imaginary part. In addition, we also examined the contribution of the wave function renormalization constant.

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