Speaker: Lingfeng Li 李凌风 (ICTP-AP)
Time: 2:30PM, 12-4, 2025
Location: Room 9409

Abstract:

In this talk, we discuss the Standard Model (SM) electroweak (EW) sector as a portal to the hidden sector, with EW bosons serving as mediators. We propose several UV complete models of the EW portal and explore their prospects in EW precision tests (EWPT). A rich phenomenology emerges when the hidden sector admits a confining gauge interaction, leading to a family of dark hadrons such as dark pions and rhos. These dark hadrons are generally long-lived if their mass is of the GeV scale. The primary signal in collider physics will be dark showers from exotic boson decays, generating multiple long-lived particles. We will cover current LHC searches and future detector proposals. At the end of the talk, we will also report some recent progress aiming for a new mechanism generating composite dark matter (DM).

Bio:

Lingfeng Li received his PhD in Theoretical High Energy Physics from University of California, Davis in 2018 under the supervision of Prof. Hsin-Chia Cheng. Then he worked in HKUST and Brown University as a Postdoctoral Researcher. He is interested in precision tests of the Standard Model and probing new physics. His study covers particle physics and cosmology.