Avoiding baryon washout in the extended standard model

Details Avoiding baryon washout in the extended standard model Avoiding baryon washout in the extended standard model

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvd..48.2456b&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 48, Issue 6, 15 September 1993, pp.2456-2461

Physics

9

Particle-Theory And Field-Theory Models Of The Early Universe, Phase Transitions: General Studies, Spontaneous Breaking Of Gauge Symmetries

Scientific paper

It has been shown recently, in a one-loop analysis, that adding a singlet to the standard model strengthens the first-order nature of the electroweak phase transition, and thus weakens the upper limit on the Higgs boson mass required for successful baryogenesis. We demonstrate that the inclusion of ring diagrams alters the argument for a light singlet, consequently weakening the Higgs boson mass bound only up to ~mW. However, the addition of several light singlets, or a heavy singlet, can raise the bound still further.

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