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Baryogenesis with Scalar Bilinears

Ernest Ma·Martti Raidal·Utpal Sarkar
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Abstract

We show that if a baryon asymmetry of the universe is generated through the out-of-equilibrium decays of heavy scalar bilinears coupling to two fermions of the minimal standard model, it is necessarily an asymmetry conserving $(B-L)$ which cannot survive past the electroweak phase transition because of sphalerons. We then show that a surviving $(B-L)$ asymmetry may be generated if the heavy scalars decay into two fermions, \underline {and into two light scalars} (which may be detectable at hadron colliders). We list all possible such trilinear scalar interactions, and discuss how our new baryogenesis scenario may occur naturally in supersymmetric grand unified theories.

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Ernest Ma, Martti Raidal, Utpal Sarkar. 1998-11-04. Baryogenesis with Scalar Bilinears. https://doi.org/10.1103/physrevd.60.076005

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