4 papers · 1 filter
New physics in toponium's shadow?
Thomas Flacke, Benjamin Fuks, Dongchan Kim +3
ATLAS and CMS have recently reported enhancements in the top-antitop production rate near threshold, a region where non-perturbative QCD dynamics associated with toponium formation…
Multi-step Strong First-Order Electroweak Phase Transitions in the Inverted Type-I 2HDM: Parameter Space, Gravitational Waves, and Collider Phenomenology
Soojin Lee, Dongjoo Kim, Jin-Hwan Cho +2
We investigate the electroweak phase transition (EWPT) within the inverted Type-I two-Higgs-doublet model, where the observed Higgs boson is identified as the hea…
Emerging Photon Jets in the Hadronic Calorimeter: A Novel Signature of Neutral Long-Lived Particles at the LHC
Jinheung Kim, Dongjoo Kim, Soojin Lee +1
We propose a novel collider signature for neutral long-lived particles (LLPs): the emerging photon jet in the hadronic calorimeter (HCAL). This signature arises when a neutral LLP…
Probing a Heavy Dark Boson at Multi-TeV Muon Colliders: Leveraging the Optimized Recoil Mass Technique
Kingman Cheung, Jinheung Kim, Soojin Lee +2
We investigate the discovery potential of multi-TeV muon colliders for a heavy dark boson () with a mass above 1 TeV through the associated production channel $μ^+μ^…