Martin Hirsch, Zeren Simon Wang Physical Review D 101, 055034 (2020) https://doi.org/10.1103/PhysRevD.101.055034 Abstract Recently Bauer et al. [arXiv:1909.13022] proposed ANUBIS, an auxiliary detector to be installed in one of the shafts above the ATLAS or CMS interaction point, as a tool to search for long-lived particles. Here, we study the sensitivity of this proposal for long-lived heavy neutral leptons (HNLs) in both minimal and extended scenarios. We start with the mi

Kingman Cheung, Zeren Simon Wang Physical Review D 101, 035003 (2020) https://doi.org/10.1103/PhysRevD.101.035003 Abstract We study displaced vertex signatures of long-lived particles (LLPs) from exotic Higgs decays in the context of a Higgs-portal model and a neutral-naturalness model at the circular electron positron collider(CEPC) and future circular collider e^+ e^- (FCC-ee). Such two models feature two representative mass ranges for LLPs, which show very different behavi

Monica D’Onofrio, Oliver Fischer, Zeren Simon Wang Physical Review D 101, 015020 (2020) https://doi.org/10.1103/PhysRevD.101.015020 Abstract Extensions of the Standard Model (SM) gauge group with a new U(1)_X predict an additional gauge boson. Through kinetic mixing with the SM photons featured by a coupling ε, the ensuing so-called dark photons γ', which acquire mass as a result of the breaking of the gauge group U(1)_X, can interact with the SM field content. These massive

Takaaki Nomura, Hiroshi Okada Physical Review D 101, 015021 (2020) https://doi.org/10.1103/PhysRevD.101.015021 Abstract We analyze the allowed region of the muon anomalous magnetic moment (muon g − 2) satisfying lepton flavor violations, Z boson decays, and collider physics, in a framework of multicharged particles. Then we explore the typical size of the muon g − 2 and discuss which mode dominantly affects the muon g − 2. #publication #paper #Extensions_of_Higgs_Sector #Exte