Dark Matter Strikes Back at the Galactic Center


Leane, R. (2019). Dark Matter Strikes Back at the Galactic Center. Perimeter Institute. https://pirsa.org/19060042


Leane, Rebecca. Dark Matter Strikes Back at the Galactic Center. Perimeter Institute, Jun. 25, 2019, https://pirsa.org/19060042


          @misc{ pirsa_19060042,
            doi = {10.48660/19060042},
            url = {https://pirsa.org/19060042},
            author = {Leane, Rebecca},
            keywords = {Particle Physics},
            language = {en},
            title = {Dark Matter Strikes Back at the Galactic Center},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {jun},
            note = {PIRSA:19060042 see, \url{https://pirsa.org}}

Rebecca Leane Massachusetts Institute of Technology (MIT)

Talk Type Scientific Series


Statistical evidence has previously suggested that the Galactic Center GeV Excess (GCE) originates largely from point sources, and not from annihilating dark matter. In this talk, I will discuss the impact of unmodeled source populations on identifying the true origin of the GCE. In a proof-of-principle example with simulated data, I will demonstrate that unmodeled sources in the Fermi Bubbles can lead to a dark matter signal being misattributed to point sources. Furthermore, I will show there is striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, I will conclude that dark matter may provide a dominant contribution to the GCE after all, and discuss future directions.