Speaker
dongjoo Kim
(Konkuk University)
Description
We propose a new collider signature for neutral long-lived particles (LLPs): an emerging photon jet in the hadronic calorimeter (HCAL), from LLP decays to photons with no ECAL activity or tracks. Using the ultralight fermiophobic Higgs $h_f$ in the Type-I 2HDM as a benchmark, we study
$pp \to H^\pm h_f \to W^\pm h_f h_f$
where one $h_f$ decays in the ECAL and the other in the HCAL. Fast simulation shows this signature enables discovery-level sensitivity at the HL-LHC and opens a new direction in LLP searches.
Primary authors
JINHEUNG KIM
(Konkuk University)
Jeonghyeon Song
(Konkuk University)
Soojin Lee
dongjoo Kim
(Konkuk University)
