Gauge B–L model with residual Z3 symmetry

Abstract

We study a gauge B − L extension of the standard model of quarks and leptons with unconventional charges for the singlet right-handed neutrinos, and extra singlet scalars, such that a residual Z 3 symmetry remains after the spontaneous breaking of B − L. We discuss the phenomenological consequences of this scenario, including the possibility of long-lived self-interacting dark matter and Z collider signatures.

The $$B-L$$ B - L scotogenic models for Dirac neutrino masses

“…One is responsible for the absence of SM Yukawa couplingsν L ν R φ 0 and the other for the stability of intermediate fields as dark matter (DM). The symmetries could be the discrete ones Z 2 [47,53,54], Z 3 [50,55], or Z 4 [56,57].…”

“…Recently, several efforts were made at tree level [55,[58][59][60], and a specific one-loop realization was also proposed based on a left-right symmetry scheme [52]. In this brief article, we propose the U (1) B−L extensions of scotogenic Dirac neutrino mass models with intermediate Dirac fermion singlets.…”

Naturally small Dirac neutrino mass with intermediate SU(2) L multiplet fields

“…[18,19], we firstly discuss the tree-level realization of Dirac seesaw with at most two extra scalars S 1,2 and a heavy intermediated Dirac fermion F 1 (figure 1). Here, the global lepton number symmetry U(1) is proposed to forbid the unwanted Majorana mass term (m N /2)ν C R ν R , meanwhile the discrete Z 3 [55,58], Z 4 [48,60,61] and ∆ (27) [62] symmetry are also optional.…”

“…[35][36][37][38][39][40][41][42] for earlier works and ref. [43][44][45][46][47][48][49] for latest works) and loop level [50][51][52][53][54][55][56][57][58][59]. In ref.…”

Gauge B–L model of radiative neutrino mass with multipartite dark matter

“…A further extension in the scalar sector allows for the unusual case of Z 3 lepton number [3] with the appearance of a scalar dark-matter candidate which is unstable but long-lived and decays to two antineutrinos.…”