8 papers
Can a pseudoscalar with a mass of 365 GeV in the 2HDM explain the CMS excess?
Chih-Ting Lu, Kingman Cheung, Dongjoo Kim +2
We analyze the CMS-reported t tbar excess within conventional Two-Higgs-Doublet Models of Types I, II, X, and Y, using the best-fit pseudoscalar parameters MA = 365 GeV, GammaA ove…
Searching for dark photons from dark-scalar decays at CEPC and FCC-ee
Kingman Cheung, Fei-Tung Chung, Zeren Simon Wang
We investigate the sensitivity of proposed CEPC and FCC-ee with a center-of-mass energy of 240 GeV to long-lived dark photons heavier than 2 GeV that are pair-produced via the prom…
New Physics Search at the CEPC: a General Perspective
Xiaocong Ai, Stefan Antusch, Peter Athron +211
The Circular Electron-Positron Collider (CEPC), a proposed next-generation Higgs factory, provides new opportunities to explore physics beyond the Standard Model (SM). With its cle…
Unveiling the Invisible: ALPs and Sterile Neutrinos at the LHC and HL-LHC
Kingman Cheung, C. J. Ouseph, Sin Kyu Kang
We investigate the potential of using the signature of mono-Higgs plus large missing energies to constrain on two new physics models, namely the model of an axion-like particle (AL…
Searching for Dark Photon Tridents Through Primordial Black Hole Signatures
Kingman Cheung, C. J. Ouseph, Po-Yan Tseng +1
The detection of gamma-ray signals from primordial black holes (PBHs) could provide compelling evidence for their role as a dark matter candidate, particularly through the observat…
Effects of Superradiance in Active Galactic Nuclei
Priyanka Sarmah, Himanshu Verma, Kingman Cheung +1
A supermassive black hole (SMBH) at the core of an active galactic nucleus (AGN) provides room for the elusive ultra-light scalar particles (ULSP) to be produced through a phenomen…