Primordial Baryon Asymmetry and Sphalerons

Details Primordial Baryon Asymmetry and Sphalerons Primordial Baryon Asymmetry and Sphalerons

1995-03-15

arxiv.org/abs/hep-ph/9503335v1

Nucl.Phys.Proc.Suppl.43:291-294,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Latex, uses espcrc2.sty, Talk at the Conference ``Trends in Particle Astrophysics'' Stockholm, Sweden, Sept. 22-25, 1

Scientific paper

10.1016/0920-5632(95)00493-S

I show that a cosmological baryon asymmetry generated at the GUT scale is in general safe against washout due to sphalerons and generic $B$- or $L$-violating effects. This result is mainly due to the (almost) conserved number of right-handed electrons at high temperatures $T \gsim {\cal O}(10) $ TeV, but also the mass corrections, in particular the thermal masses of leptons act as the protector of the primordial baryon asymmetry.

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