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On the sensitivity of CTA to gamma-ray boxes from multi-TeV dark matter
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Technical University of Munich, Germany.
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Number of Authors: 5
2015 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 9, 048Article in journal (Refereed) Published
Abstract [en]

Collider, direct and indirect searches for dark matter have typically little or no sensitivity to weakly interacting massive particles (WIMPs) with masses above a few TeV. This rather unexplored regime can however be probed through the search for distinctive gamma-ray spectral features produced by the annihilation of WIMPs at very high energies. Here we present a dedicated search for gamma-ray boxes - sharp spectral features that cannot be mimicked by astrophysical sources - with the upcoming Cherenkov Telescope Array (CTA). Using realistic projections for the instrument performance and detailed background modelling, a pro file likelihood analysis is implemented to derive the expected upper limits and sensitivity reach after 100 h of observations towards a 2 degrees x 2 degrees region around the Galactic centre. Our results show that CTA will be able to probe gamma-ray boxes down to annihilation cross sections of 10(-27) - 10(-26) cm(3)/s up to tens of TeV. We also identify a number of concrete particle physics models providing thermal dark matter candidates that can be used as target benchmarks in future search campaigns. This constitutes a golden opportunity for CTA to either discover or rule out multi-TeV thermal dark matter in a corner of parameter space where all other experimental efforts are basically insensitive.

Place, publisher, year, edition, pages
2015. no 9, 048
Keyword [en]
dark matter experiments, gamma ray experiments, dark matter theory
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-125042DOI: 10.1088/1475-7516/2015/09/048ISI: 000365690000048OAI: diva2:891606
Available from: 2016-01-07 Created: 2016-01-07 Last updated: 2016-01-07Bibliographically approved

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Pato, Miguel
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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