Probing Leptogenesis

Abstract : The focus of this paper lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated from oscillations, as well as leptogenesis from out-of-equilibrium decays. As the Akhmedov–Rubakov–Smirnov (ARS) mechanism allows for heavy neutrinos in the GeV range, this opens up a plethora of possible experimental tests, e.g. at neutrino oscillation experiments, neutrinoless double beta decay, and direct searches for neutral heavy leptons at future facilities. In contrast, testing leptogenesis from out-of-equilibrium decays is a quite difficult task. We comment on the necessary conditions for having successful leptogenesis at the TeV-scale. We further discuss possible realizations and their model specific testability in extended seesaw models, models with extended gauge sectors, and supersymmetric leptogenesis. Not being able to test high-scale leptogenesis directly, we present a way to falsify such scenarios by focusing on their washout processes. This is discussed specifically for the left–right symmetric model and the observation of a heavy WR, as well as model independently when measuring ΔL = 2 washout processes at the LHC or neutrinoless double beta decay.
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Int.J.Mod.Phys.A, 2018, 33 (05n06), pp.1842005. 〈10.1142/S0217751X18420058〉
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Soumis le : lundi 12 mars 2018 - 22:01:26
Dernière modification le : vendredi 7 décembre 2018 - 01:26:16

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E.J. Chun, G. Cvetič, P.S.B. Dev, M. Drewes, C.S. Fong, et al.. Probing Leptogenesis. Int.J.Mod.Phys.A, 2018, 33 (05n06), pp.1842005. 〈10.1142/S0217751X18420058〉. 〈hal-01730080〉

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