2014/05/20 by Kei Yagyu, Yagyu, Kei · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.1405.5149
Talk presented at the International Workshop on Future Linear Colliders (LCWS13), Tokyo, Japan, 11-15 November 2013. References are added
openalex publication_date 2014/05/20 · arxiv created 2014/05/27 · arxiv updated 2014/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Higgs Triplet Model (HTM) is one of important examples for extended Higgs sectors, because tiny neutrino masses can be simply explained. Unlike the canonical type-I seesaw model, a scale of new particles can be taken as O(100) GeV keeping an enough amount of production cross section for direct searches at collider experiments. In the HTM, there appear doubly-charged Higgs bosons H±±, and detection of them is a key to probe the model. The decay property of H±± depends on the magnitude of the vacuum expectation value of the triplet field vΔ. When vΔ is smaller than about 1 MeV, H±± can mainly decay into the same-sign dilepton, and the lower mass limit for H±± had been taken to be about 400 GeV at the LHC. On the other hand, if vΔ is larger than about 1 MeV, H±± can mainly decay into the same-sign diboson. In this case, the mass bound cannot be applied, so that the scenario based on light H±± is still possible. In this talk, we discuss the phenomenology of the same-sign diboson decay scenario of H±±. First, we review the mass bound from the current collider experiments given in Ref. \citeKYY. We then discuss the strategy for detection of H±± at the ILC.