| Issue |
EPL
Volume 142, Number 1, April 2023
|
|
|---|---|---|
| Article Number | 14001 | |
| Number of page(s) | 6 | |
| Section | Nuclear and plasma physics, particles and fields | |
| DOI | https://doi.org/10.1209/0295-5075/acc60c | |
| Published online | 30 March 2023 | |
Annihilation of singlet fermionic dark matter into two photons via pseudo-scalar mediator
Department of Physics, University of Qom - Ghadir Blvd., Qom 371614-6611, I.R. Iran
(a) E-mail: mettefaghi@qom.ac.ir (corresponding author)
(b) E-mail: r.moazzemi@qom.ac.ir
(c) E-mail: maryamyazdani8@yahoo.com
Received: 25 September 2022
Accepted: 21 March 2023
We consider the indirect detection of dark matter within an extension of the standard model (SM) including a singlet fermion as cold dark matter (CDM) and a singlet pseudo-scalar as a mediator between dark matter and the SM particles. The annihilation cross-section of the CDM into two monochromatic photons is calculated and compared with the latest H.E.S.S. data. Although for dark matter masses below 1 TeV the predicted observable cross-sections are far from the sensitivity of the recent gamma-ray experiments, it can be comparable to the strongest H.E.S.S. upper bounds for some models with more massive CDM.
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