|
Résumé |
MeV gamma-rays have historically been difficult to detect, leading to poorer
sensitivities than those in neighboring energy bands, a limitation known as the
MeV gap. Recent advances in technology, however, have led to new missions
designed to close this gap, most notably NASA's Compton Spectrometer and Imager
(COSI), scheduled for launch in 2027. In this talk, I will discuss the
implications of COSI for dark matter (DM) phenomenology. Using realistic detector
simulations, detector response calculations, and Poisson likelihood analyses, we
evaluate the projected sensitivity of COSI to a diverse set of DM candidates and
find that COSI can improve current constraints by O(10 - 100). I will further
apply these projected sensitivities to a well-motivated DM scenario, focusing on
either primordial black holes or sub-GeV DM, and show that COSI can probe viable
regions of parameter space that remain unconstrained by current observations. |
