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Title: Impact of semi-annihilation of ℤ{sub 3} symmetric dark matter with radiative neutrino masses

Abstract

We investigate a ℤ{sub 3} symmetric model with two-loop radiative neutrino masses. Dark matter in the model is either a Dirac fermion or a complex scalar as a result of an unbroken ℤ{sub 3} symmetry. In addition to standard annihilation processes, semi-annihilation of the dark matter contributes to the relic density. We study the effect of the semi-annihilation in the model and find that those contributions are important to obtain the observed relic density. The experimental signatures in dark matter searches are also discussed, where some of them are expected to be different from the signatures of dark matter in ℤ{sub 2} symmetric models.

Authors:
 [1];  [2]
  1. Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192 (Japan)
  2. Institute for Particle Physics Phenomenology, University of Durham, Durham DH1 3LE (United Kingdom)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22454501
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 09; Other Information: PUBLISHER-ID: JCAP09(2014)016; OAI: oai:repo.scoap3.org:3924; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; COSMOLOGY; FERMIONS; MASS; NEUTRINOS; NONLUMINOUS MATTER; RELICT RADIATION; SYMMETRY

Citation Formats

Aoki, Mayumi, and Toma, Takashi. Impact of semi-annihilation of ℤ{sub 3} symmetric dark matter with radiative neutrino masses. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/09/016.
Aoki, Mayumi, & Toma, Takashi. Impact of semi-annihilation of ℤ{sub 3} symmetric dark matter with radiative neutrino masses. United States. doi:10.1088/1475-7516/2014/09/016.
Aoki, Mayumi, and Toma, Takashi. Mon . "Impact of semi-annihilation of ℤ{sub 3} symmetric dark matter with radiative neutrino masses". United States. doi:10.1088/1475-7516/2014/09/016.
@article{osti_22454501,
title = {Impact of semi-annihilation of ℤ{sub 3} symmetric dark matter with radiative neutrino masses},
author = {Aoki, Mayumi and Toma, Takashi},
abstractNote = {We investigate a ℤ{sub 3} symmetric model with two-loop radiative neutrino masses. Dark matter in the model is either a Dirac fermion or a complex scalar as a result of an unbroken ℤ{sub 3} symmetry. In addition to standard annihilation processes, semi-annihilation of the dark matter contributes to the relic density. We study the effect of the semi-annihilation in the model and find that those contributions are important to obtain the observed relic density. The experimental signatures in dark matter searches are also discussed, where some of them are expected to be different from the signatures of dark matter in ℤ{sub 2} symmetric models.},
doi = {10.1088/1475-7516/2014/09/016},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2014,
place = {United States},
year = {Mon Sep 08 00:00:00 EDT 2014},
month = {Mon Sep 08 00:00:00 EDT 2014}
}