Electroweak Portal to the Hidden Valley - Lingfeng Li (Brown U.)

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, as well as the cosmological implications.