Classification of targets for gamma-ray dark matter searches with velocity-dependent annihilation and substructure boost

Discussion timeslot (ZOOM-Meeting): 20. July 2021 - 12:00
ZOOM-Meeting URL: https://desy.zoom.us/j/96969970711
ZOOM-Meeting ID: 96969970711
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/40-Dark-Matter-Indirect-Detection-and-Cosmological-Substructures-DM/81
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-07/8

Abstract:
'Gamma-ray searches have long been used to constrain the properties of particle dark matter (DM) candidates. In this context, significant effort has been focused in the past decades on the vanilla weakly interacting massive particle (WIMP) DM scenario in which DM particles annihilate through a velocity-independent (s-wave) process. However, in the absence of clear-cut observational evidence for the simplest candidates, the interest of the community in more complex DM scenarios involving a velocity-dependent cross-section (such as p-wave processes and Sommerfeld enhancement) has been growing steadily over the past few years. rnIn this talk I will present the first systematic study of velocity-dependent DM annihilation in a variety of astrophysical objects, not only including the well studied dwarf spheroidal galaxies, but dwarf irregular galaxies and galaxy clusters as well. I will focus more specifically on the interplay between velocity dependence and DM substructures, relying on an analytic model of the DM subhalo boost that self-consistently accounts for dynamical constraints on each target of interest. I will present detailed predictions of the astrophysical factors entering DM-induced gamma-ray fluxes, emphasizing physical dependences and theoretical uncertainties. I will then discuss implications in terms of ranking of the various targets for gamma-ray searches, and consequences for DM models.'

Authors: Martin Stref | Thomas Lacroix | Judit Pérez-Romero | Miguel Sánchez-Conde | David Maurin | Gaétan Facchinetti | Julien Lavalle
Indico-ID: 564
Proceeding URL: https://pos.sissa.it/395/571