IRN Terascale @ Laboratori Nazionali di Frascati

Novel Weinberg-like operators from new scalar multiplets

15 avr. 2024, 17:05

25m

Auditorium B. Touschek (Laboratori Nazionali di Frascati)

Beyond the Standard Model Beyond the Standard Model

Orateur

Simone Marciano (INFN - Università Roma Tre)

Description

The Weinberg operator, the unique dimension-5 effective operator LLHH, can generate tiny Majorana masses for neutrinos. In the presence of new scalar multiplets acquiring vacuum expectation values (VEVs), novel Weinberg-like operators emerge, subsequently contributing to Majorana neutrino masses. We consider scenarios involving one or two new scalars transforming under higher SU(2) representations $\mathcal{R}$, up to $\mathcal{R}\le 5$. We start our analysis from an Effective Field Theory approach and subsequently investigate potential tree-level UV completions for the newly introduced dimension-5 operators.

Documents de présentation

IRNterasclaleMarciano24.pdf