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Paper IPM / Physic / 17192  


Abstract:  
We explore the noncommutative spacetime to revive the idea that gammaray excess in the
galactic center can be the result of particle dark matter annihilation. In the noncommutative
theory, the photon spectrum is produced by direct emission during this annihilation where a photon can be embed in the final state together with other direct products in new vertices. In the
various configurations of dark matter phenomenology, we pursue the most common model known
as singlet scalar. Calculating the relevant aspects of the model and determining the parameters
phase space, we obtain the photon flux in the galactic center, a dense region sometimes with the
presence of strong magnetic fields, which is an appropriate place to study theories involving Lorentz
symmetry breaking. Comparing our numerical achievements with experimental data reveals that
noncommutative spacetime can be a reliable framework to explain the gammaray excess.
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