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Search for dark matter using sub-PeV γ-rays observed by Tibet ASγ

Maity, TN and Saha, AK and Dubey, A and Laha, R (2022) Search for dark matter using sub-PeV γ-rays observed by Tibet ASγ. In: Physical Review D, 105 (4).

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Official URL: https://doi.org/10.1103/PhysRevD.105.L041301


The discovery of diffuse sub-PeV gamma-rays by the Tibet ASγ Collaboration promises to revolutionize our understanding of the high-energy astrophysical universe. It has been shown that these data broadly agree with prior theoretical expectations. We study the impact of this discovery on a well-motivated new physics scenario: PeV-scale decaying dark matter (DM). Considering a wide range of final states in DM decay, a number of DM density profiles, and numerous astrophysical background models, we find that these data provide the most stringent limit on DM lifetime for various Standard Model final states. In particular, we find that the strongest constraints are derived for DM masses in between a few PeV to a few tens of PeV. Near-future data of these high-energy gamma-rays can be used to discover PeV-scale decaying DM.

Item Type: Journal Article
Publication: Physical Review D
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 29 Jun 2022 06:54
Last Modified: 29 Jun 2022 06:54
URI: https://eprints.iisc.ac.in/id/eprint/73855

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