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Title: Cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model

Here, grand unified theories based on large groups (with rank ≥ 6) are a natural context for dark matter models. They contain Standard-Model-singlet fermions that could be dark matter candidates, and can contain new non-abelian interactions whose sphalerons convert baryons, leptons, and dark matter into each other, ''cogenerating" a dark matter asymmetry comparable to the baryon asymmetry. In this paper it is shown that the same non-abelian interactions can ''pre-annihilate" the symmetric component of heavy dark matter particles χ, which then decay late into light stable dark matter particles ζ that inherit their asymmetry. We derive cosmological constraints on the parameters of such models. The mass of χ must be < 3000 TeV and their decays must happen when 2 × 10 –7 < T dec/mχ < 10 –4. It is shown that such decays can come from d=5 operators with coefficients of order 1/MGUT or 1/M Pℓ. We present a simple realization of our model based on the group SU(7).
Authors:
 [1] ;  [2]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Vanderbilt Univ., Nashville, TN (United States)
Publication Date:
Grant/Contract Number:
SC0011981
Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Research Org:
Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter theory; baryon asymmetry; leptogenesis
OSTI Identifier:
1436124

Barr, S. M., and Scherrer, Robert J.. Cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model. United States: N. p., Web. doi:10.1088/1475-7516/2016/05/065.
Barr, S. M., & Scherrer, Robert J.. Cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model. United States. doi:10.1088/1475-7516/2016/05/065.
Barr, S. M., and Scherrer, Robert J.. 2016. "Cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model". United States. doi:10.1088/1475-7516/2016/05/065. https://www.osti.gov/servlets/purl/1436124.
@article{osti_1436124,
title = {Cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model},
author = {Barr, S. M. and Scherrer, Robert J.},
abstractNote = {Here, grand unified theories based on large groups (with rank ≥ 6) are a natural context for dark matter models. They contain Standard-Model-singlet fermions that could be dark matter candidates, and can contain new non-abelian interactions whose sphalerons convert baryons, leptons, and dark matter into each other, ''cogenerating" a dark matter asymmetry comparable to the baryon asymmetry. In this paper it is shown that the same non-abelian interactions can ''pre-annihilate" the symmetric component of heavy dark matter particles χ, which then decay late into light stable dark matter particles ζ that inherit their asymmetry. We derive cosmological constraints on the parameters of such models. The mass of χ must be < 3000 TeV and their decays must happen when 2 × 10–7 < Tdec/mχ < 10–4. It is shown that such decays can come from d=5 operators with coefficients of order 1/MGUT or 1/MPℓ. We present a simple realization of our model based on the group SU(7).},
doi = {10.1088/1475-7516/2016/05/065},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2016,
place = {United States},
year = {2016},
month = {5}
}