Jul 3 – 8, 2016
The University of Melbourne
Australia/Melbourne timezone

Constraints on dark matter annihilation to fermions and a photon

Jul 4, 2016, 4:50 PM
Carillo Gantner Theatre

Carillo Gantner Theatre

Carrillo Gantner Theatre, Sidney Myer Asia Centre The University of Melbourne VIC 3010 Australia
Talk Dark Matter and Particle Astrophysics Dark Matter and Particle Astrophysics


Debtosh Chowdhury (INFN, Rome)


We consider Majorana dark matter annihilation to fermion - anti-fermion pair and a photon in the effective field theory paradigm, by introducing dimension 6 and dimension 8 operators in the Lagrangian. For a given value of the cut-off scale, the latter dominates the annihilation process for heavier dark matter masses. We find a cancellation in the dark matter annihilation to a fermion - anti-fermion pair when considering the interference of the dimension 6 and the dimension 8 operators. Constraints on the effective scale cut-off is derived while considering indirect detection experiments and the relic density requirements and then comparing them to the bound coming from collider experiments.

Primary author

Debtosh Chowdhury (INFN, Rome)


Abhishek M. Iyer (Tata Institute of Fundamental Research, Mumbai) Ranjan Laha (Stanford University)

Presentation materials