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Title: Gamma-rays from Heavy Minimal Dark Matter

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]
  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:
22458399
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 10; Other Information: PUBLISHER-ID: JCAP10(2015)058; OAI: oai:repo.scoap3.org:12428; 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)
Sponsoring Org:
SCOAP3, CERN, Geneva (Switzerland)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; CHERENKOV COUNTING; DENSITY; FERMIONS; GAMMA RADIATION; INTERNAL BREMSSTRAHLUNG; NONLUMINOUS MATTER; SU-2 GROUPS; TELESCOPES; TEV RANGE