Zeren Simon Wang, Phenomenological studies on searching for long-lived particles with displaced vertices and jets at the LHC

Thursday Jun 26, 2025, 3:00 PM → 4:00 PM Asia/Seoul

Abstract: Searching for long-lived particles has become an important research direction in the quest for physics beyond the Standard Model, e.g. the LHC experiments have reported multiple such searches. In the first part of this talk, I will discuss how to recast a recent ATLAS search for displaced vertices plus jets and reinterpret the obtained bounds in terms of an axion-like particle with quark flavor violation and various benchmark scenarios of dark scalars. In the second part, I will focus on long-lived heavy neutral leptons (HNLs) from top-quark decays in the theoretical framework of sterile-neutrino-extended Standard Model Effective Field Theory, showing why the ATLAS DV+jets search fails in this case and how we may modify the search to constrain the scenario. The sensitivity reach of proposed LHC far detectors to such HNLs will also be discussed.