%0 Journal Article
%T Lowering the scale of fermion triplet leptogenesis with two Higgs doublets
%A Vatsyayan, D.
%A Goswami, S.
%J Physical Review D
%D 2023
%V 107
%N 3
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Vatsyayan+Goswami2023
%O WOS:000982166600007
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5544), last updated on Fri, 16 Jun 2023 06:34:39 +0000
%X In this paper, we consider the possibility of generating the observed baryon asymmetry of the Universe via leptogenesis in the context of a triplet fermion-mediated type-III seesaw model of neutrino mass. With a hierarchical spectrum of the additional fermions, the lower bound on the lightest triplet mass is similar to 1010 GeV for successful leptogenesis, a couple of orders higher than that of the type-I case. We investigate the possibility of lowering this bound in the framework of two-Higgs-doublet models. We find that the bounds can be lowered down to 107 GeV for a hierarchical spectrum. If we include the flavor effects, then a further lowering by one order of magnitude is possible. We also discuss if such lowering can be compatible with the naturalness bounds on the triplet mass.
%R 10.1103/PhysRevD.107.035014
%U https://arxiv.org/abs/2208.12011
%U https://doi.org/10.1103/PhysRevD.107.035014
%P 035014-9pp