1. New scenario for GUT scale baryogenesis and novel nucleon decay modes in SO(10)
- Author
-
K. S. Babu
- Subjects
Physics ,Particle physics ,media_common.quotation_subject ,High Energy Physics::Phenomenology ,Electroweak interaction ,Asymmetry ,Sphaleron ,Baryogenesis ,Baryon asymmetry ,Higgs boson ,Grand Unified Theory ,High Energy Physics::Experiment ,Baryon number ,media_common - Abstract
Minimal SO(10) models which utilize a 126-plet of Higgs for breaking B - L symmetry are quite predictive for the neutrino oscillation parameters. These models have been known to predict sin2 2θ13 ≃ 0.09, which is consistent with recent measurements. It is shown that the same class of models generates naturally baryon number violating dimension seven operators leading to novel nucleon decay modes such as n → e−K+, e−π+ and p → νπ+ which violate B - L by two units. In two-step breaking schemes of non-supersymmetric SO(10), the partial lifetimes for these modes can be within reach of experiments. The interactions responsible for these decay modes also provide a new way to understand the origin of matter in the universe via the decays of colored scalar bosons with GUT scale masses. Their (B - L)-violating nature guarantees that the GUT scale induced baryon asymmetry is not washed out by the electroweak sphaleron interactions. In minimal SO(10) models this asymmetry is closely tied to the masses of quarks, lep...
- Published
- 2013
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