Investigation of Flavored Dark Matter: From Laboratory to Telescopes

by Dr Sahabub Jahedi (South China Normal University (SCNU))

Tuesday 1 Sept 2026, 14:00 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N601 - Meeting Room (Tsung-Dao Lee Institute)

Abstract:

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 (μ-e, τ-e, and τ-μ) 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 li→lj+DM+DMli​→lj​+DM+DM to constrain the effective interactions, and then we discuss muonium invisible decay following the constraints from the μ-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.

Speaker Bio:

Dr. Sahabub Jahedi received his Ph.D. in 2024 from IIT Guwahati, India. He is currently a postdoctoral researcher at the Institute of Quantum Matter, South China Normal University. His research focuses on the post-inflationary production of dark matter, BSM phenomenology at colliders, flavor-violating dark matter phenomenology, flavor physics, primordial gravitational waves, and gravitational waves generated during the electroweak phase transition. His work explores how new physics beyond the Standard Model can account for dark matter's origin and properties, linking early-universe cosmology and phase-transition dynamics with collider signatures to deepen our understanding of fundamental particles and the universe's hidden matter content.

Alternative online link: https://meeting.tencent.com/dm/dRJ8ehpvFOPo
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