ɛ-type contribution to baryon asymmetry from colored Higgs triplets

Details ɛ-type contribution to baryon asymmetry from colored Higgs triplets ɛ-type contribution to baryon asymmetry from colored Higgs triplets

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..44..966b&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 44, Issue 4, 15 August 1991, pp.966-969

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Particle-Theory And Field-Theory Models Of The Early Universe, Charge Conjugation, Parity, Time Reversal, And Other Discrete Symmetries, Unified Theories And Models Of Strong And Electroweak Interactions

Scientific paper

In scenarios where the cosmological baryon asymmetry is generated in the decay of heavy colored Higgs triplets at the one-loop level (at least two triplets are needed), it is shown that in addition to the conventional triangle loop (ɛ'-type effect), a new kind of diagram must be considered. This new type of diagram has its origin in the mixing of the two Higgs fields (ɛ-type effect). The mixing of the two Higgs fields violates CP provided they have at least two common decay channels. For small mixing angles, the new contribution can be bigger than the conventional one.

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