• Minimal Dark Matter
• three-body
• Monte Carlo
• Indirect Detection
• Radiative Corrections
• Dark Matter

The computation of the energy spectra of Standard Model particles originated from the annihilation/decay of Dark Matter is of primary importance in indirect searches for Dark Matter.

We compute such spectra for a large set of DM masses and annihilation/decay channels. In doing so, we employ the Monte Carlo simulation program HERWIG, and compare our results with the same analyses done with PYTHIA, obtaining in this way an estimation of the MC errors in the fluxes.

MC parton shower programs do not include electroweak radiation effects, that are relevant
when the DM mass is of the order of a TeV or higher, like experiments seem to suggest. Thus
we consider a model-independent inclusion of electroweak corrections in the computation of the spectra by means of a new general partonic technique, and we check it by comparing the results of its application with a full computation we perform in the specific Minimal Dark Matter model, finding a very good agreement.
In this model the two natural candidates for DM are a fermionic quintuplet and a scalar eptaplet,
their only annihilation channel is into gauge bosons.
For the both of them we consider the three body processes DM DM -> W W gamma and DM DM -> W W Z and perform the full computation of the gamma, W and Z energy spectra dN/dE. Incidentally we also find that at O(M_W/M), with M DM mass, the results are the same for both scalar and fermionic DM.