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DTSTART;TZID=America/Chicago:20260518T133000
DTEND;TZID=America/Chicago:20260518T143000
DTSTAMP:20260916T145654Z
SUMMARY:HEP Informal Seminar: Deepak Sathyan: "Producing the GeV Galactic Center Excess via Cosmic Ray-Dark Matter Scattering"
UID:646192@northwestern.edu
TZID:America/Chicago
DESCRIPTION:We propose a novel mechanism for generating gamma rays from the Galactic Center via scattering of cosmic-ray protons off dark matter in the Milky Way halo\, in contrast to conventional explanations based on dark matter annihilation. We present two examples of this framework that produce an observable photon signal. In the inelastic dark matter model\, cosmic rays up-scatter a lighter dark matter particle\, with the subsequent decay of the heavier particle yielding two photons. In the elastic dark matter model\, an energetic photon is directly produced in the final state of a 2-to-3 scattering process. We show that\, for a range of viable model parameters\, this framework provides a fit to the observed Galactic Center gamma-ray excess spectrum comparable to those obtained from dark matter annihilation and millisecond pulsar models. Our results open a new avenue for interpreting gamma-ray observations of the Galactic Center. I will also present preliminary results on obtaining the 20 GeV excess via cosmic ray-dark matter scattering.  Deepak Sathyan\, Postdoctoral Research Associate\, Texas A & M University  Host: Gustavo Alves
LOCATION:Dearborn Observatory\, Room 23\, 2131 Tech Drive\, Evanston\, IL 60208
TRANSP:OPAQUE
URL:https://planitpurple.northwestern.edu/event/646192
CREATED:20241011T050000Z
STATUS:CONFIRMED
LAST-MODIFIED:20260914T211654Z
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