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arXiv · 1806.07615

Neutrino phenomenology from leptogenesis

Franco Buccella·Damiano F. G. Fiorillo·Gennaro Miele·Stefano Morisi·Ofelia Pisanti·Pietro Santorelli
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Abstract

Assuming a type-I seesaw mechanism for neutrino mass generation and invoking a baryogengesis via leptogenesis scenario, we consider a reasonable hierarchical structure for Dirac neutrino mass matrix, similar to up-type quark mass matrix. These hypotheses imply a relevant connection between high scale CP violation and low energy one. By requiring a compact heavy neutrino mass spectrum, which allows to circumvent Davidson-Ibarra limit, one can obtain an efficient leptogenesis restricting the allowed region for low energy neutrino parameters. Once the oscillating parameters are taken inside a $3σ$ range, through the numerical resolution of the leptogenesis Boltzmann equations one gets the following allowed intervals for the lightest neutrino mass and the Dirac CP phase: $-0.90π<δ<-0.75π$ and $m_1\sim( 0.002 - 0.004)$ eV.

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Franco Buccella, Damiano F. G. Fiorillo, Gennaro Miele, Stefano Morisi, Ofelia Pisanti, Pietro Santorelli. 2018-06-20. Neutrino phenomenology from leptogenesis. https://doi.org/10.1140/epjc%2Fs10052-018-6299-6

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