TY  - JOUR
AU  - Giarnetti, A.
AU  - Herrero-Garcia, J.
AU  - Marciano, S.
AU  - Meloni, D.
AU  - Vatsyayan, D.
PY  - 2024
DA  - 2024//
TI  - Neutrino masses from new Weinberg-like operators: phenomenology of TeV scalar multiplets
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 055
EP  - 37pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Baryon/Lepton Number Violation
KW  - Multi-Higgs Models
AB  - The unique dimension-5 effective operator, LLHH, known as the Weinberg operator, generates tiny Majorana masses for neutrinos after electroweak spontaneous symmetry breaking. If there are new scalar multiplets that take vacuum expectation values (VEVs), they should not be far from the electroweak scale. Consequently, they may generate new dimension-5 Weinberg-like operators which in turn also contribute to Majorana neutrino masses. In this study, we consider scenarios with one or two new scalars up to quintuplet SU(2) representations. We analyse the scalar potentials, studying whether the new VEVs can be induced and therefore are naturally suppressed, as well as the potential existence of pseudo-Nambu-Goldstone bosons. Additionally, we also obtain general limits on the new scalar multiplets from direct searches at colliders, loop corrections to electroweak precision tests and the W-boson mass.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2312.13356
UR  - https://doi.org/10.1007/JHEP05(2024)055
DO  - 10.1007/JHEP05(2024)055
LA  - English
N1  - WOS:001255993100006
ID  - Giarnetti_etal2024
ER  -