Publication: Dark matter searches by the planned gamma-ray telescope GAMMA-400
Дата
2020
Авторы
Egorov, A. E.
Topchiev, N. P.
Dalkarov, O. D.
Suchkov, S. I.
Galper, A. M.
Leonov, A. A.
Yurkin, Y. T.
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© 2020 IOP Publishing Ltd and Sissa Medialab.Our paper reviews the planned space-based gamma-ray telescope GAMMA-400 and evaluates in details its opportunities in the field of dark matter (DM) indirect searches. We estimated the GAMMA-400 mean sensitivity to the diphoton DM annihilation cross section in the Galactic center for DM particle masses in the range of 1-500 GeV. We obtained the sensitivity gain at least by 1.2-1.5 times (depending on DM particle mass) with respect to the expected constraints from 12 years of observations by Fermi-LAT for the case of Einasto DM density profile. The joint analysis of the data from both telescopes may yield the gain up to 1.8-2.3 times. Thus the sensitivity reaches the level of annihilation cross section 〈 σ v 〉γγ(mχ = 100 GeV) ≈ 10-28 cm3/s. This will allow us to test the hypothesized narrow lines predicted by specific DM models, particularly the recently proposed pseudo-Goldstone boson DM model. We also considered the decaying DM - in this case the joint analysis may yield the sensitivity gain up to 1.1-2.0 times reaching the level of DM lifetime τγν(mχ = 100 GeV) ≈ 2 ċ 1029 s. We estimated the GAMMA-400 sensitivity to axion-like particle (ALP) parameters by a potential observation of the supernova explosion in the Local Group. This is very sensitive probe of ALPs reaching the level of ALP-photon coupling constant gaγ ∼ 10-13 GeV-1 for ALP masses ma ≲ 1 neV. We also calculated the sensitivity to ALPs by constraining the modulations in the spectra of the Galactic gamma-ray pulsars due to possible ALP-photon conversion. GAMMA-400 is expected to be more sensitive than the CAST helioscope for ALP masses ma ≈ (1 - 10) neV reaching gaγmin ≈ 2 ċ 10-11 GeV-1. Other potentially interesting targets and candidates are briefly considered too.
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Dark matter searches by the planned gamma-ray telescope GAMMA-400 / Egorov, A.E. [et al.] // Journal of Cosmology and Astroparticle Physics. - 2020. - 2020. - № 11. - 10.1088/1475-7516/2020/11/049
URI
https://www.doi.org/10.1088/1475-7516/2020/11/049
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https://openrepository.mephi.ru/handle/123456789/22735
https://www.scopus.com/record/display.uri?eid=2-s2.0-85097673897&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000609097800015
https://openrepository.mephi.ru/handle/123456789/22735