Natalia Tapia (Utah U.)

10:00am Wednesday April 12, 2023

Searching for new gamma ray signals from cosmic ray scattering on axionlike particles

Can we still consider the galactic center gamma ray excess to be a hint of Dark Matter (DM)? Thanks to the Fermi Gamma Ray Space Telescope we can explore the center of our galaxy and use the publicly available 12 years of data collection for our analysis.
If we consider axionlike particles (ALPs) as a DM candidate which couples to gamma ray photons and the standard model fermions we can expect to observe photon signals arising from cosmic ray (CR) electron scattering on background ALPs. For a range of masses and using the Fermi data we can set bounds with competitive new constraints on the ALP-electron coupling.