PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - DM - Dark Matter
Classification of targets for gamma-ray dark matter searches with velocity-dependent annihilation and substructure boost
M. Stref*, T. Lacroix, G. Facchinetti, J. Pérez-Romero, J. Lavalle, D. Maurin and M. Sanchez-Conde
Full text: pdf
Pre-published on: July 07, 2021
Published on: March 18, 2022
Indirect searches with gamma rays set strong constraints on the properties of self-annihilating dark matter particle candidates. Observations of dwarf galaxies and galaxy clusters are especially interesting. Here we revisit the calculation of the annihilation flux by considering a velocity-dependent cross-section (Sommerfeld enhanced, for both $s$-wave and $p$-wave) and the boost factor due to dark matter substructure. We show that the combination of these two effects can lead to dramatic enhancements of the gamma-ray flux, and possibly modify the hierarchy between the brightest targets in the sky.
DOI: https://doi.org/10.22323/1.395.0571
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