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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Searching for secluded dark matter with HESS, Fermi-LAT, and Planck

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Autor(es):
Profumo, Stefano [1, 2] ; Queiroz, Farinaldo S. [3, 4] ; Silk, Joseph [5, 6, 7] ; Siqueira, Clarissa [8, 3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 - USA
[2] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 - USA
[3] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg - Germany
[4] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Natal, RN - Brazil
[5] UPMC, Inst Astrophys, CNRS, F-75014 Paris - France
[6] Johns Hopkins Univ, Dept Phys & Astron, Homewood Campus, Baltimore, MD 21218 - USA
[7] Univ Oxford, Dept Phys, BIPAC, Keble Rd, Oxford OX1 3RH - England
[8] Univ Fed Paraiba, Dept Fis, Caixa Postal 5008, BR-58051970 Joao Pessoa, Paraiba - Brazil
Número total de Afiliações: 8
Tipo de documento: Artigo Científico
Fonte: Journal of Cosmology and Astroparticle Physics; n. 3 MAR 2018.
Citações Web of Science: 13
Resumo

Short-lived mediators are often used to describe dark matter interactions with Standard Model particles. When the dark matter mass is heavier than the mass of the mediator, it may self-annihilate into short-lived mediators, and in some cases this might be the dominant annihilation channel. This scenario is known as secluded dark matter. We use Fermi-LAT observations of dwarf spheroidal galaxies, H.E.S.S. data from the Galactic center, and Planck measurements of the Cosmic Microwave Background to constrain secluded dark matter. We explore the interplay between these experiments and we assess the impact of the mediator mass on our bounds, an often overlooked yet very important point. In particular, we exclude pair - annihilation cross-sections greater or on the order of sigma v similar to 4 x 10(-27) cm(3)/s for dark matter masses around 10 GeV and greater or on the order of sigma v similar to x 10(-25) cm(3)/s for dark matter masses around a TeV. Our findings supersede previous constraints which use Fermi-LAT data, and constitute the first limits on secluded dark sectors using the H.E.S.S. telescope. We also show that one can fit TeV gamma-ray observations from H.E.S.S. with secluded dark matter annihilations, with the mediator mass impacting the best-fit dark matter particle mass. Our findings indicate that any assessment of secluded dark sectors in the context of indirect detection significantly depends on the choice of the mediator mass. (AU)

Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
Beneficiário:Nathan Jacob Berkovits
Linha de fomento: Auxílio à Pesquisa - Temático