Speaker
Clarissa Siqueira
(Max Planck Institut für Kernphysik)
Description
Secluded dark matter models feature dark matter annihilations into a metastable mediator which then decays into Standard Model fermions. In this work, we test these models using current data from the Fermi-LAT (6-year observation of dwarf spheroidal galaxies) and the H.E.S.S.~(10-year observation of the Galactic center) instrument. Assuming that the metastable mediator shortly decays into charged leptons we derive constraints on the annihilation cross section {\it vs} dark matter mass. In particular, for decays into taus, we exclude $\sigma v \sim 4 \times 10^{-27} {\rm cm^3/s}$ for dark matter mass of $10$~GeV using Fermi-LAT, and $\sigma v \sim 3 \times 10^{-25} {\rm cm^3/s}$ for $1$TeV dark matter mass with H.E.S.S.. Our findings supersede previous constraints using Fermi-LAT data and constitute the first time limits on secluded dark sectors using H.E.S.S telescope.
Primary authors
Dr
Carlos Yaguna
(Escuela de Física, Universidad Pedagógica y Tecnológica de Colombia (UPTC))
Dr
Christoph Weniger
(University of Amsterdam)
Clarissa Siqueira
(Max Planck Institut für Kernphysik)
Dr
Farinaldo Queiroz
(Max Planck Institut für Kernphysik)
Dr
Joseph Silk
(University of Oxford)
