2021/02/25 by Kazuki Enomoto, Shinya Kanemura, Kento Katayama
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Electron #Higgs boson #Hypercharge #Large Hadron Collider #Lepton #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Quark #Scalar (mathematics) #Scalar boson #Scalar field #hep-ph
paper · pdf · doi:10.1103/physrevd.104.035040
published as Phys. Rev. D 104, 035040 (2021) · 32 pages, 12 figures, 3 tables
arxiv created 2021/02/25 · openalex publication_date 2021/08/31 · arxiv updated 2021/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The isospin doublet scalar field with hypercharge 3/2 is introduced in some new physics models such as tiny neutrino masses. Detecting the doubly charged scalar bosons from the doublet field can be a good probe of such models. However, their collider phenomenology has not been examined sufficiently. We investigate collider signatures of the doubly and singly charged scalar bosons at the LHC for the high-luminosity upgraded option (HL-LHC) by looking at transverse mass distributions etc. With the appropriate kinematical cuts we demonstrate the background reduction in the minimal model in the following two cases depending on the mass of the scalar bosons. (1) The main decay mode of the singly charged scalar bosons is the tau lepton and missing (as well as charm and strange quarks). (2) That is into a top bottom pair. In the both cases, we assume that the doubly charged scalar boson is heavier than the singly charged ones. We conclude that the scalar doublet field with Y=3/2 is expected to be detectable at the HL-LHC unless the mass is too large.