December 5, 2025Open Access

Renormalization group running triggered tri-resonant leptogenesis within neutrino flavor-symmetry models

Key Points

Baryon-antibaryon asymmetry is linked to right-handed neutrino mass in this framework, showing promising implications for our understanding of cosmic evolution.
The study investigates how renormalization group running influences the necessary mass splittings for effective leptogenesis mechanisms.
Using neutrino flavor-symmetry models, researchers explore the implications for the observable universe's baryon distribution and stability.
Findings support the relevance of theoretical models in comprehending fundamental cosmic asymmetries, urging further exploration of neutrino physics.

Abstract

Abstract In this paper, we have studied the consequences of some representative neutrino flavor-symmetry models for tri-resonant leptogenesis (which is realized by having three nearly degenerate right-handed neutrinos). To be specific, we have considered a neutrino flavor-symmetry model realizing the TM1 mixing and modular A₄ A 4, S₄ S 4 and A₅ A 5 symmetry models that have a right-handed neutrino mass matrix Mₑ M R as shown in Eq. (6) which gives three exactly degenerate right-handed neutrino masses and consequently prohibits the leptogenesis mechanism to work successfully. For these models, we study the scenario that the desired right-handed neutrino mass splittings for leptogenesis to work are generated from the renormalization-group running effects. In such a scenario, we explore the parameter space that allows for the reproduction of the observed baryon-antibaryon asymmetry of the Universe.

Renormalization group running triggered tri-resonant leptogenesis within neutrino flavor-symmetry models

Key Points

Abstract

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