A search for dark matter using sub- PeV gamma-rays observed by Tibet ASγ

2 Sep 2021, 17:10
50m
Talk in parallel session Dark Matter and its detection Discussion Panel Dark Matter 9

Speaker

Tarak Maity (Centre for High Energy Physics, Indian Institute of Science, Bengaluru, Karnataka 560012, India)

Description

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 this data broadly agrees 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 this data provides 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 few tens of PeV. Near future data of these high-energy gamma-rays can be used to discover PeV-scale decaying DM.

Primary author

Tarak Maity (Centre for High Energy Physics, Indian Institute of Science, Bengaluru, Karnataka 560012, India)

Co-authors

Ranjan Laha (Indian Institute of Science, Bengaluru, India) Abhishek Dubey Akash Saha

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