Probing Leptogenesis
(2018) International Journal of Modern Physics A : particles and fields; gravitation; cosmology; nuclear physics — Vol. 33, n° 05n06, p. 1842005 (2018)
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- Abstract
- The focus of this chapter 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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Citations
Drewes, M., & et al. (2018). Probing Leptogenesis. International Journal of Modern Physics A : particles and fields; gravitation; cosmology; nuclear physics, 33(05n06), 1842005. https://doi.org/10.1142/S0217751X18420058 (Original work published 2018)