Baryogenesis without the out-of-equilibrium decay of superheavy bosons

Details Baryogenesis without the out-of-equilibrium decay of superheavy bosons Baryogenesis without the out-of-equilibrium decay of superheavy bosons

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phrvd..25..299t&link_type=abstract

Physical Review D (Particles and Fields), Volume 25, Issue 2, 15 January 1982, pp.299-305

Physics

2

Scientific paper

The "standard" grand-unified-theory scenario for producing the baryon number-to-specific-entropy ratio of the universe involves the out-of-equilibrium decay of superheavy particles (>~ 1014 GeV) whose interactions do not conserve B, C, or CP invariance. I discuss a scenario in which the baryon asymmetry is produced by B-, C-, and CP-nonconserving scatterings of massless fermions. In this model at least one fermion species must initially have a nonthermal distribution; the baryon excess generated can be larger than that produced by out-of-equilibrium decays. In order for this scenario to produce a significant baryon excess, the mass of the superheavy boson which mediates the scatterings must be >~ 3 × 1015 GeV.

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