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Indirect detection; light dark matter; gamma rays; chiral Lagrangian.

We consider models of light dark matter coupled to quarks through a vector current interaction. For low energies, these models must be treated through the effective couplings to mesons, which are implemented here through the chiral Lagrangian. We find the signals of dark matter annihilation and decay to the light mesons, and find the expected photon spectrum from the decay of the hadrons. We compare the current and future observations, and show that there is a significant discovery reach for these models.

DILLON BERGER¹ ARVIND RAJARAMAN¹ JASON KUMAR²

1. Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA
2. Department of Physics and Astronomy, University of Hawai’i, Honolulu, HI 96822, USA

Published

29 August 2020

Manuscript received

6 April 2020

Manuscript revised

20 May 2020

Accepted

18 June 2020

Final version published online

29 August 2020