Scotogenic dark symmetry as a residual subgroup of Standard Model symmetries * * Work supported by the Spanish grants FPA2017-85216-P (AEI/FEDER, UE), PROMETEO/2018/165 (Generalitat Valenciana) and the Spanish Red Consolider MultiDark FPA2017-90566-REDC. SCC is supported by the Spanish grant BES-2016-076643. RC is supported by the Spanish grant FPU15/03158. EP is sopported by the grants CONACYT CB-2017-2018/A1-S-13051 (México) and DGAPA-PAPIIT IN107118

Salvador Centelles Chuliá,Rahul Srivastava,Ricardo Cepedello,Eduardo Peinado

doi:10.1088/1674-1137/44/8/083110

Salvador Centelles Chuliá, Rahul Srivastava + Show 2 more

Open Access

https://doi.org/10.1088/1674-1137/44/8/083110

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Abstract

We demonstrate that a scotogenic dark symmetry can be obtained as a residual subgroup of the global symmetry already present in the Standard Model. In addition, we propose a general framework in which the symmetry is spontaneously broken into an even subgroup, setting the general conditions for neutrinos to be Majorana and for dark matter stability to exist in terms of the residual . As an example, under this general framework, we build a class of simple models where, in a scotogenic manner, the dark matter candidate is the lightest particle running inside the mass loop of a neutrino. The global symmetry in our framework, being anomaly free, can also be gauged in a straightforward manner leading to a richer phenomenology.

Highlights

The Standard Model of particle physics is a highly successful theory with an enormous predictive power
We demonstrate that a scotogenic dark symmetry can be obtained as a residual subgroup of the global U(1)B−L symmetry already present in the Standard Model
We propose a general framework in which the U(1)B−L symmetry is spontaneously broken into an even Z2n subgroup, setting the general conditions for neutrinos to be Majorana and for dark matter stability to exist in terms of the residual Z2n

Summary

Introduction

The Standard Model of particle physics is a highly successful theory with an enormous predictive power. The Standard Model has no such candidate This has created the need to extend the matter content and possibly the symmetry inventory to explain the cosmological observations pointing toward the existence of dark matter. Majorana neutrino mass models still remain the popular choice for the Standard Model extensions that try to explain the existence of massive neutrinos [23,24,25,26,27,28,29,30,31,32]. We show that for Majorana neutrinos with U(1)B−L → Z2n , the residual Z2n subgroup can be used to obtain a stable candidate for dark matter without adding any new symmetry to the Standard Model.

General formalism

One-loop realizations of the operator LcLHHχ

Simple explicit model

The scalar terms relevant for neutrino masses are given by the following

Summary and conclusion