Common origin of baryon asymmetry and proton decay

Details Common origin of baryon asymmetry and proton decay Common origin of baryon asymmetry and proton decay

2011-10-20

arxiv.org/abs/1110.4581v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 4 figures

Scientific paper

A successful baryogenesis theory requires a baryon-minus-lepton number violation if it works before the electroweak phase transition. The baryon-minus-lepton number violation could also exist in the proton and neutron decays. We propose a model to show that the baryogenesis and the nucleon decay could have a common origin. Specifically we introduce an isotriplet leptoquark scalar and two isotriplet Higgs scalars to the canonical seesaw model. A Higgs triplet has a quartic coupling with three leptoquark triplets and a cubic coupling with two Higgs doublets. The decays of the Higgs triplets thus can generate a baryon-minus-lepton asymmetry. The tiny vacuum expectation values of the Higgs triplets can naturally induce a testable proton decay even if the leptoquark is at the TeV scale. The leptoquark associated with any flavor neutrinos can mediate a neutrinoless double beta decay.

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