Abstract

We investigate the possibility of segregation of baryons and anti-baryons in the quark-gluon plasma phase in the early universe due to CP violating scattering of quarks and antiquarks from moving Z(3) domain walls. CP violation here is spontaneous in nature and arises from the nontrivial profile of the background gauge field (A0 ) between different Z(3) vacua. We study the effect of this spontaneous CP violation on the baryon transport across the collapsing large Z(3) domain walls (which can arise in the context of certain low energy scale inflationary models). Our results show that this CP violation will lead to the segregation of baryons and anti-baryons in early universe near the confinement-deconfinement phase tranition epoch. We discuss consequences of this baryon anti baryon segregation in the subsequent cosmological evolution.

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