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  • Letter
  • Open Access

First implications of Tibet ASγ data for heavy dark matter

Arman Esmaili*

P. D. Serpico†

  • Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro 22452-970, Brazil

  • Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, LAPTh, F-74940 Annecy, France

  • *arman@puc-rio.br
  • †serpico@lapth.cnrs.fr
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Phys. Rev. D 104, L021301 – Published 7 July, 2021

DOI: https://doi.org/10.1103/PhysRevD.104.L021301

Abstract

Extensive air shower detectors of gamma rays in the sub-PeV energy region provide a new and relatively unexplored window for dark matter searches. Here we derive some implications of the recently published Tibet ASγ data for decaying dark matter candidates. The available spectral information is already useful in obtaining competitive constraints, surpassing existing limits above 10 PeV mass for hadronic or massive boson final states. This is particularly true if accounting for a benchmark astrophysical background of Galactic cosmic rays in the (0.1–1) PeV range. By relying on the arrival distribution of the photons, we show that significantly better sensitivity can be attained, comparable or better than IceCube also for most leptonic final states. Full data exploitation requires however further information disclosure.

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Phys. Rev. D 104, L021301– Published 7 July, 2021
  • Received 12 May 2021
  • Accepted 11 June 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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