Cogenerating and Pre-annihilating Dark Matter by a New Gauge Interaction in a Unified Model

Autor:	Barr, S. M., Scherrer, Robert J.
Rok vydání:	2015
Předmět:	High Energy Physics - Phenomenology Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2016/05/065
Popis:	Grand unified theories based on large groups (with rank greater or equal to 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, which then decay late into light stable dark matter particles that inherit their asymmetry. It is shown that such decays can come from d=5 operators that are Planck or GUT suppressed. We derive constraints on such models and present a simple realization based on the group SU(7). Comment: 14 pages, a fully unified model presented in much greater detail
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1508.07469 Zobrazit plný text záznamu View this record from Arxiv