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arXiv · 2201.04646

Neutrino seesaw models at one-loop matching: Discrimination by effective operators

Yong Du·Xu-Xiang Li·Jiang-Hao Yu
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Abstract

Using the functional method, one-loop matching of the type-I, -II and -III seesaw models are investigated and the results are presented in both the Green's and the Warsaw bases. Although these models generate the same dimension-5 Weinberg operator, they could induce quite different types of dimension-6 effective operators that can be utilized for model discrimination. We also find the threshold effects from one-loop matching could be significant, which turn out to allow triggering electroweak symmetry breaking radiatively in type-II seesaw while forbid that in type-I/-III models. An analytical criterion for such radiative symmetry breaking is also derived in type-II seesaw. Finally, we investigate the indirect signatures from different types of dimension-6 operators at high-energy colliders, low-energy precision experiments and forward physics facilities for model discrimination.

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Yong Du, Xu-Xiang Li, Jiang-Hao Yu. 2022-01-12. Neutrino seesaw models at one-loop matching: Discrimination by effective operators. https://doi.org/10.1007/jhep09(2022)207

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