Search for right-handed neutrinos from dark matter annihilation with gamma-rays

被引：35

作者：

Campos, Miguel D. ^{[1
]}

Queiroz, Farinaldo S. ^{[1
]}

Yaguna, Carlos E. ^{[1
,2
]}

Weniger, Christoph ^{[3
]}

机构：

[1] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[2] UPTC, Escuela Fis, Ave Cent Norte, Tunja, Colombia

[3] Univ Amsterdam, Inst Phys, GRAPPA, Sci Pk 904, NL-1090 GL Amsterdam, Netherlands

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2017年 / 07期

关键词：

dark matter theory; particle physics - cosmology connection; FERMI-LAT; HALOES; GALAXY; MASSES; MODELS; PARITY; DECAY; SHAPE; CONSTRAINTS; EVOLUTION;

D O I：

10.1088/1475-7516/2017/07/016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Several extensions of the Standard Model contain right-handed (sterile) neutrinos in the GeV-TeV mass range. Due to their mixing with the active neutrinos, they may give rise to novel effects in cosmology, neutrino physics, and collider searches. In addition, right-handed neutrinos can also appear as final states from dark matter annihilations, with important implications for dark matter indirect detection searches. In this paper, we use current data from the Fermi Large Area Telescope (6-year observation of dwarf spheroidal galaxies) and H.E.S.S. (10-year observation of the Galactic center) to constrain the annihilation of dark matter into right-handed neutrinos. We consider right-handed neutrino with masses between 10 GeV and 1 TeV, including both two-body and three-body decays, to derive bounds on the dark matter annihilation rate, sigma v , as a function of the dark matter mass. Our results show, in particular, that the thermal dark matter annihilation cross section, 3 x 10(-26) cm(3) s(-1), into right-handed neutrinos is excluded for dark matter masses smaller than 200 GeV.

引用

页数：19

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