Speaker
Description
Leptogenesis provides an attractive mechanism for explaining the baryon asymmetry of the Universe, while flavor symmetry models offer a natural framework for understanding the observed patterns of neutrino masses and lepton mixing. Motivated by the intimate connection between neutrino mass generation and leptogenesis, this report discusses recent studies of leptogenesis in neutrino flavor symmetry models. We first focus on flavon-assisted low-scale leptogenesis, where flavon fields responsible for generating right-handed neutrino masses also induce new decay channels and additional sources of CP violation, allowing successful leptogenesis at the TeV scale without requiring a highly degenerate right-handed neutrino spectrum. We then examine leptogenesis in left-right symmetric frameworks with the simplest flavor structures, where scalar triplet interactions provide additional contributions to the CP asymmetry and make leptogenesis viable even in scenarios where conventional type-I leptogenesis fails.
| 请选择分会 | 中微子物理、粒子天体物理与宇宙学 |
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