Constraining dark matter lifetime with a deep gamma-ray survey of the Perseus galaxy cluster with MAGIC



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Barrio Uña, Juan Abel and Contreras González, José Luis and Domínguez Díaz, Alberto and Carreto Fidalgo, David Friedrich and Fonseca González, Mª Victoria and Hoang, Kim Dinh and López Moya, Marcos and Miranda Pantoja, José Miguel and Nievas Rosillo, Mireia and Peñil del Campo, Pablo and Saha, Lab and otros, ... (2018) Constraining dark matter lifetime with a deep gamma-ray survey of the Perseus galaxy cluster with MAGIC. Physics of the dark universe, 22 . pp. 38-47. ISSN 2212-6864

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Clusters of galaxies are the largest known gravitationally bound structures in the Universe, with masses around 10(15)M circle dot, most of it in the form of dark matter. The ground-based Imaging Atmospheric Cherenkov Telescope MAGIC made a deep survey of the Perseus cluster of galaxies using almost 400 h of data recorded between 2009 and 2017. This is the deepest observational campaign so far on a cluster of galaxies in the very high energy range. We search for gamma-ray signals from dark matter particles in the mass range between 200 GeV and 200 TeV decaying into standard model pairs. We apply an analysis optimized for the spectral and morphological features expected from dark matter decays and find no evidence of decaying dark matter. From this, we conclude that dark matter particles have a decay lifetime longer than similar to 10(26) s in all considered channels. Our results improve previous lower limits found by MAGIC and represent the strongest limits on decaying dark matter particles from ground-based gamma-ray instruments. (C) 2018 Elsevier B.V. All rights reserved.

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© 2018 Elsevier B.V. All rights reserved. Artículo firmado por 151 autores. We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia "Severo Ochoa'' SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia "María de Maeztu'' MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The work of the author M. Vázquez Acosta is financed with grant RYC-2013-14660 of MINECO, Spain.

Uncontrolled Keywords:Major upgrade; Cosmic-rays; Performance; Telescopes; Emission; Spectrum; Models; Limits
Subjects:Sciences > Physics > Nuclear physics
Sciences > Physics > Particles
ID Code:55280
Deposited On:28 May 2019 10:54
Last Modified:28 May 2019 12:04

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