Baryogenesis via Leptogenesis in Adjoint SU(5)

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dc.creatorBlanchet, Steve
dc.creatorPerez, Pavel Fileviez
dc.date2008-07-24
dc.date2008-08-07
dc.date.accessioned2026-07-07T11:45:02Z
dc.date.available2026-07-07T11:45:02Z
dc.descriptionThe 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.
dc.description15 pages, 3 figures, minor corrections, to appear in JCAP
dc.identifierhttps://arxiv.org/abs/0807.3740
dc.identifierhttp://arxiv.org/abs/0807.3740
dc.identifierJCAP0808:037,2008
dc.identifierdoi:10.1088/1475-7516/2008/08/037
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201759
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBaryogenesis via Leptogenesis in Adjoint SU(5)
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