A Markov Chain Monte Carlo Study on Dark Matter Property Related to the Cosmic e$^{\pm}$ Excesses

Understand

In this paper we develop a Markov Chain Monte Carlo code to study the dark matter properties in interpreting the recent observations of cosmic ray electron/positron excesses.

• We assume that the dark matter particles couple dominantly to leptons and consider two cases separately with annihilating or decaying into lepton pairs.
• The constraint on the central density profile from diffuse $\gamma$-rays around the Galactic center is also included in the Markov Chain Monte Carlo code self-consistently.
• In the numerical study, 7 parameters are introduced.