Sahabub Jahedi (SCNU), "Investigation of Flavored Dark Matter: From Laboratory to Telescopes"

Wednesday 17 Jun 2026, 15:00 → 16:00 Asia/Seoul

CTPU Seminar room (Theory Bldg, 4F)

In this talk, I will present a comprehensive analysis of lepton flavor-violating (LFV) dark matter (DM) interactions within an effective field theory (EFT) framework, covering both terrestrial and astrophysical constraints. Working with leading-order effective leptophilic operators for three different flavor combinations (\mu-e, \tau-e, and \tau-\mu) and the three canonical DM candidates (scalar, fermion, and vector), we derive constraints from multiple complementary channels. On the terrestrial side, we analyze the three-body decay l_i -> l_j + DM + DM to constrain the effective interactions, and then we discuss muonium invisible decay following the constraints from the \mu-e flavor scenario. On the astrophysical side, we utilize photon and positron data from Fermi-LAT, INTEGRAL, XMM-Newton, and AMS-02, accounting for final-state radiation, radiative decay, and inverse Compton scattering contributions in the context of DM pair annihilation to different flavor charged leptons. These laboratory and astrophysical searches are complementary to each other, together placing stringent constraints on flavor-violating effective interactions across the kinematically accessible parameter space.