Successful Leptogenesis in SO10 Unification with a Left-Right Symmetric Seesaw Mechanism - High Energy Physics - PhenomenologyReport as inadecuate




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Abstract: We study thermal leptogenesis in a broad class of supersymmetric SO10models with a left-right symmetric seesaw mechanism, taking into accountflavour effects and the contribution of the next-to-lightest right-handedneutrino supermultiplet. Assuming M D = M u and a normal hierarchy of lightneutrino masses, we show that four out of the eight right-handed neutrino massspectra reconstructed from low-energy neutrino data can lead to successfulleptogenesis with a reheating temperature in the 10^9 - 10^10 GeV range. Inthe remaining four solutions, leptogenesis is dominated by N 2 decays, as inthe type I seesaw case. We find that some of these spectra can generate theobserved baryon asymmetry for reheating temperatures above 10^10 GeV, incontrast to the type I case. Together with flavour effects, an accuratedescription of charged fermion masses turns out to be a crucial ingredient inthe analysis.



Author: Asmaa Abada, Pierre Hosteins, Francois-Xavier Josse-Michaux, Stephane Lavignac

Source: https://arxiv.org/



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