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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

WIMP and SIMP dark matter from the spontaneous breaking of a global group

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Author(s):
Bernal, Nicolas [1] ; Garcia-Cely, Camilo [2] ; Rosenfeld, Rogerio [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, BR-01405 Sao Paulo - Brazil
[2] Univ Libre Bruxelles, Serv Phys Theor, B-1050 Brussels - Belgium
Total Affiliations: 2
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 4 APR 2015.
Web of Science Citations: 42
Abstract

We propose and study a scalar extension of the Standard Model which respects a Z(3) symmetry remnant of the spontaneous breaking of a global U(1)(DM) symmetry. Consequently, this model has a natural dark matter candidate and a Goldstone boson in the physical spectrum. In addition, the Higgs boson properties are changed with respect to the Standard Model due to the mixing with a new particle. We explore regions in the parameter space taking into account bounds from the measured Higgs properties, dark matter direct detection as well as measurements of the effective number of neutrino species before recombination. The dark matter relic density is determined by three classes of processes: the usual self-annihilation, semi-annihilation and purely dark matter 3 -> 2 processes. The latter has been subject of recent interest leading to the so-called `Strongly Interacting Massive Particle' (SIMP) scenario. We show under which conditions our model can lead to a concrete realization of such scenario and study the possibility that the dark matter self-interactions could address the small scale structure problems. In particular, we find that in order for the SIMP scenario to work, the dark matter mass must be in the range 7-115 MeV, with the global symmetry energy breaking scale in the TeV range. (AU)

FAPESP's process: 11/11973-4 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support type: Research Projects - Thematic Grants