Smallness of neutrino masses and leptogenesis in 331 composite Higgs model
Year: 2026
Type: article
Abstract: We consider 331 composite Higgs model (CHM3) in which the Lagrangian of the strongly coupled sector is invariant with respect to global SU (3) C × SU (3) × U (1) 6 symmetry that can originate from SU (6) subgroup of E 6 and contains the gauge group of the standard model (SM) as a subgroup. The breakdown of the approximate SU (3) × U (1) 6 symmetry down to SU (2) W × U (1) Y subgroup around the scale f ∼ 10 TeV results in a set of pseudo–Nambu–Goldstone bosons (pNGBs) that, in particular, involves Higgs doublet. The generation of the masses of the SM fermions in the CHM3 is discussed. We argue that approximate U (1) L and discrete Z 2 symmetries may give rise to tiny masses of the left–handed neutrinos and several composite fermions with masses 1 − 2 TeV . The lepton and baryon asymmetries can be generated within the CHM3 via the out–of equilibrium decays of extra Majorana particle into the Higgs doublet and these composite fermions.
Source: Physics Letters B
Author: Roman Nevzorov
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7125486800