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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Some implications of the leptonic annihilation of dark matter: possible galactic radio emission signatures and the excess radio flux of extragalactic origin

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Author(s):
Fortes, Elaine C. F. S. [1, 2] ; Miranda, Oswaldo D. [2] ; Stecker, Floyd W. [3, 4] ; Wuensche, Carlos A. [2]
Total Authors: 4
Affiliation:
[1] Univ Fed Pampa, Rua Luiz Joaquim Sa Brito S-N, BR-97650000 Itaqui, RS - Brazil
[2] Inst Nacl Pesquisas Espaciais, Av Astronautas 1758, BR-01506000 Sao Jose Dos Campos, SP - Brazil
[3] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 - USA
[4] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 - USA
Total Affiliations: 4
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 11 NOV 2019.
Web of Science Citations: 0
Abstract

We give theoretical predictions for the radio emission of a dark matter candidate annihilating into 2-lepton and 4-lepton final states. We then compare our results with the known radio measurements of the sky temperature as a function of the frequency. In particular, we calculate the radio emission for some dark matter candidates annihilating into intermediate bosons that subsequently decay into a 4-lepton channel with a thermal annihilation cross-section. We show that within the range of frequencies from 20 MHz to 5 GHz, this channel can produce a stronger signature than direct annihilation into leptons. (AU)

FAPESP's process: 18/21532-4 - Study of radio waves signals of dark matter by Gravitating systems
Grantee:Oswaldo Duarte Miranda
Support type: Research Grants - Visiting Researcher Grant - Brazil