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Title: Gamma-rays from Heavy Minimal Dark Matter

Abstract

Motivated by the Minimal Dark Matter scenario, we consider the annihilation into gamma rays of candidates in the fermionic 5-plet and scalar 7-plet representations of SU(2){sub L}, taking into account both the Sommerfeld effect and the internal bremsstrahlung. Assuming the Einasto profile, we show that present measurements of the Galactic Center by the H.E.S.S. instrument exclude the 5-plet and 7-plet as the dominant form of dark matter for masses between 1 TeV and 20 TeV, in particular, the 5-plet mass leading to the observed dark matter density via thermal freeze-out. We also discuss prospects for the upcoming Cherenkov Telescope Array, which will be able to probe even heavier dark matter masses, including the scenario where the scalar 7-plet is thermally produced.

Authors:
;  [1]; ;  [2]
  1. Service de Physique Théorique, CP225, Université Libre de Bruxelles, Bld du Triomphe, 1050 Brussels (Belgium)
  2. Physik-Department T30d, Technische Universität München, James-Franck-Straße, D-85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22525218
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; DENSITY; FERMIONS; GAMMA RADIATION; INTERNAL BREMSSTRAHLUNG; MASS; NONLUMINOUS MATTER; PARTICLE MULTIPLETS; PROBES; SCALARS; SU-2 GROUPS; TELESCOPES; TEV RANGE

Citation Formats

Garcia-Cely, Camilo, Tytgat, Michel H.G., Ibarra, Alejandro, and Lamperstorfer, Anna S., E-mail: cgarciac@ulb.ac.be, E-mail: ibarra@tum.de, E-mail: anna.brunnbauer@mytum.de, E-mail: mtytgat@ulb.ac.be. Gamma-rays from Heavy Minimal Dark Matter. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/10/058.
Garcia-Cely, Camilo, Tytgat, Michel H.G., Ibarra, Alejandro, & Lamperstorfer, Anna S., E-mail: cgarciac@ulb.ac.be, E-mail: ibarra@tum.de, E-mail: anna.brunnbauer@mytum.de, E-mail: mtytgat@ulb.ac.be. Gamma-rays from Heavy Minimal Dark Matter. United States. doi:10.1088/1475-7516/2015/10/058.
Garcia-Cely, Camilo, Tytgat, Michel H.G., Ibarra, Alejandro, and Lamperstorfer, Anna S., E-mail: cgarciac@ulb.ac.be, E-mail: ibarra@tum.de, E-mail: anna.brunnbauer@mytum.de, E-mail: mtytgat@ulb.ac.be. Thu . "Gamma-rays from Heavy Minimal Dark Matter". United States. doi:10.1088/1475-7516/2015/10/058.
@article{osti_22525218,
title = {Gamma-rays from Heavy Minimal Dark Matter},
author = {Garcia-Cely, Camilo and Tytgat, Michel H.G. and Ibarra, Alejandro and Lamperstorfer, Anna S., E-mail: cgarciac@ulb.ac.be, E-mail: ibarra@tum.de, E-mail: anna.brunnbauer@mytum.de, E-mail: mtytgat@ulb.ac.be},
abstractNote = {Motivated by the Minimal Dark Matter scenario, we consider the annihilation into gamma rays of candidates in the fermionic 5-plet and scalar 7-plet representations of SU(2){sub L}, taking into account both the Sommerfeld effect and the internal bremsstrahlung. Assuming the Einasto profile, we show that present measurements of the Galactic Center by the H.E.S.S. instrument exclude the 5-plet and 7-plet as the dominant form of dark matter for masses between 1 TeV and 20 TeV, in particular, the 5-plet mass leading to the observed dark matter density via thermal freeze-out. We also discuss prospects for the upcoming Cherenkov Telescope Array, which will be able to probe even heavier dark matter masses, including the scenario where the scalar 7-plet is thermally produced.},
doi = {10.1088/1475-7516/2015/10/058},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2015,
place = {United States},
year = {2015},
month = {10}
}