Speaker
Description
Neutrinoless double-beta decay provides a unique low-energy window into lepton-number violation, the Majorana nature of neutrinos, and physics beyond the Standard Model. This talk will give a concise overview of the theoretical framework for estimating its half-life, emphasizing the roles of phase-space factors, nuclear matrix elements, and particle-physics parameters. I will discuss the main theoretical uncertainties, especially those associated with nuclear matrix elements, short-range nuclear effects, and the possible quenching of the axial coupling. I will also explain how these uncertainties affect the interpretation of current and future experimental limits. Finally, I will highlight how neutrinoless double-beta decay can probe the effective Majorana mass, neutrino mass ordering, Majorana CP phases, and representative new-physics scenarios such as seesaw models.
| 请选择分会 | 中微子物理、粒子天体物理与宇宙学 |
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