Baryogenesis via Leptogenesis in Adjoint SU(5)

Abstract

The possibility to explain the baryon asymmetry in the Universe through the leptogenesis mechanism in the context of Adjoint SU(5) is investigated. In this model the neutrino masses are generated through the Type I and Type III seesaw mechanisms, and the field responsible for the Type III seesaw, called rho_3, generates the B-L asymmetry needed to satisfy the observed value of the baryon asymmetry in the Universe. We find that the CP asymmetry originates only from the vertex correction, since the self-energy contribution is not present. When neutrino masses have a normal hierarchy, successful leptogenesis is possible for 10^{11} GeV < M_{ρ_3}^{NH} < 4 10^{14} GeV. When the neutrino hierarchy is inverted, the allowed mass range changes to 2 10^{11} GeV < M_{ρ_3}^{IH} < 5 10^{11} GeV. These constraints make possible to rule out a large part of the parameter space in the theory which was allowed by the unification of gauge interactions and the constraints coming from proton decay.

15 pages, 3 figures, minor corrections, to appear in JCAP

References in corpus (7)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Phenomenology with Massive Neutrinos
• Flavour Matters in Leptogenesis
• Renormalizable Adjoint SU(5)
• New aspects of leptogenesis bounds
• Sommerfeld corrections to type-II and III leptogenesis
• Proton Stability, Dark Matter and Light Color Octet Scalars in Adjoint SU(5) Unification

Cited by in corpus (8)

• Leptogenesis in the Universe
• GUT Physics in the era of the LHC
• Grand Unification and Light Color-Octet Scalars at the LHC
• Implications of Flavor Dynamics for Fermion Triplet Leptogenesis
• Adjoint SU(5) GUT model with Modular $S_4$ Symmetry
• $\nu$-GMSB with Type III Seesaw and Phenomenology
• New Solution for Neutrino Masses and Leptogenesis in Adjoint SU(5)
• Probing Seesaw in an Adjoint SUSY SU(5) Model at LHC