Wed, October 8, 2025
11:30 am - 12:30 pm
Price Place PRB M2005
Title: Hunting Heavy Decaying Dark Matter with Tibet AS_\gamma and LHAASO-KM2A
Abstract: The non-gravitational nature of dark matter (DM) is one of the most important open questions in modern physics. In this talk, I will discuss how high energy diffuse gamma-ray observations can be used to search for DM. PeV scale heavy DM particles can decay to various Standard Model final states which in turn can produce high energy gamma rays. These gamma rays will contribute to the diffuse gamma-ray measurements by air-shower experiments like Tibet AS_\gamma and LHAASO. Using the latest diffuse gamma-ray measurements from LHAASO-KM2A and upper limits from Tibet AS_\gamma, we put stringent constraints on decaying DM for masses 10^6 - 10^9 GeV.