Speaker
Martin Hirsch
(IFIC (CSIC, Universidad de Valencia))
Description
Majorana neutrino masses can be generated in a variety of ways. The simplest possibility is to open the d=5 Weinberg operator at tree-level. This leads to the three well-known variants of the seesaw mechanism. However, the smallness of the observed neutrino masses can also be understood, if neutrino masses are generated by higher-dimensional operators and/or at higher loop level. In this talk I will summarize recent work on higher-dimensional and radiative neutrino mass modeling from a general point of view. In particular the complete 3-loop classification scheme, published in JHEP 1810 (2018) 197, will be discussed.
Primary author
Martin Hirsch
(IFIC (CSIC, Universidad de Valencia))
