Leptogenesis in GeV-scale seesaw models

Leptogenesis in GeV-scale seesaw models

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Leptogenesis in GeV-scale seesaw models

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Hernández Gamazo, Pilar; Kekic, Marija; López Pavón, Jacobo; Racker, Jean Jacques; Rius Dionis, Nuria Perfil
This document is a artículoDate2015

Este documento está disponible también en : http://hdl.handle.net/10550/56108
We revisit the production of leptonic asymmetries in minimal extensions of the Standard Model that can explain neutrino masses, involving extra singlets with Majorana masses in the GeV scale. We study the quantum kinetic equations both analytically, via a perturbative expansion up to third order in the mixing angles, and numerically. The analytical solution allows us to identify the relevant CP invariants, and simplifies the exploration of the parameter space. We find that sizeable lepton asymmetries are compatible with non-degenerate neutrino masses and measurable active-sterile mixings.

    Hernández Gamazo, Pilar Kekic, Marija López Pavón, Jacobo Racker, Jean Jacques Rius Dionis, Nuria 2015 Leptogenesis in GeV-scale seesaw models The Journal of high energy physics 10 10 067-1 067-34

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