Fitting formulae for photon spectra from WIMP annihilation
J. A. R. Cembranos, A. de la Cruz-Dombriz, A. Dobado, R. Lineros and, A. L. Maroto

TL;DR
This paper provides fitting formulae for photon spectra resulting from WIMP annihilation into various particles, aiding model-independent analysis of gamma-ray signals from dark matter.
Contribution
It introduces new fitting formulae for photon spectra from WIMP annihilation into quarks, leptons, and gauge bosons across a wide mass range.
Findings
Fitting formulae accurately model photon spectra for different WIMP channels.
Enables model-independent analysis of gamma-ray signals.
Supports indirect dark matter detection efforts.
Abstract
Annihilation of different dark matter (DM) candidates into Standard Model (SM) particles could be detected through their contribution to the gamma ray fluxes that are measured on the Earth. The magnitude of such contributions depends on the particular DM candidate, but certain imprints of produced photon spectra may be analyzed in a model-independent fashion. In this work we provide the fitting formulae for the photon spectra generated by WIMP annihilation into quarks, leptons and gauge bosons channels in a wide range of WIMP masses.
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