Speaker
Giacomo Ferrante
(LUPM)
Description
In models with spontaneous symmetry breaking by scalar fields in large group representations, we observe that some of the scalar masses can be loop-suppressed with respect to the naive expectation from symmetry selection rules. We present the most minimal model — the SU(2) five-plet — with such accidentally light scalars, featuring compact tree-level flat directions lifted by radiative corrections. We sketch some applications, from stable relics and slow roll in cosmology, to hierarchy and fine-tuning problems in particle physics.
Primary authors
Felix Brümmer
(LUPM)
Giacomo Ferrante
(LUPM)
Michele Frigerio
(L2C)
Thomas Hambye
(Université Libre de Bruxelles)
