Testing the Higgs triplet model with the mass difference at the LHC

2011/10/31 by Mayumi Aoki, Shinya Kanemura, Kei Yagyu · 3 citations
Physics and Astronomy · #Boson #Cosmology and Gravitation Theories #Electroweak interaction #Higgs boson #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar (mathematics) #Vacuum expectation value #hep-ph

paper · pdf · doi:10.1103/physrevd.85.055007

15 pages, 28 figures, text slightly modified, version to appear in Physical Review D

openalex publication_date 2012/03/08 · arxiv created 2012/03/17 · arxiv updated 2015/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

In general, there can be mass differences among scalar bosons of the Higgs triplet field with the hypercharge of Y=1. In the Higgs triplet model, when the vacuum expectation value v_\ensuremathΔ of the triplet field is much smaller than that v (\ensuremath≃246 GeV) of the Higgs doublet field as required by the electroweak precision data, a characteristic mass spectrum m_H⁺⁺²\ensuremath-m_H⁺²\ensuremath≃m_H⁺²\ensuremath-m_\ensuremathφ⁰²(\ensuremath≡\ensuremathξ) appears, where m_H⁺⁺, m_H⁺, m_\ensuremathφ⁰ are the masses of the doubly-charged (H⁺⁺), the singly-charged (H⁺), and the neutral (\ensuremathφ⁰=H⁰ or A⁰) scalar bosons, respectively. It should be emphasized that phenomenology with \ensuremathξ\ensuremath≠0 is drastically different from that in the case with \ensuremathξ=0 where the doubly-charged scalar boson decays into the same-sign dilepton \ensuremathℓ⁺\ensuremathℓ⁺ or the diboson W⁺W⁺ depending on the size of v_\ensuremathΔ. We find that, in the case of \ensuremathξ>0, where H⁺⁺ is the heaviest, H⁺⁺ can be identified via the cascade decays such as H⁺⁺\ensuremath→H⁺W^+(*)\ensuremath→\ensuremathφ⁰W^+(*)W^+(*)\ensuremath→bb\ensuremathℓ⁺\ensuremathν\ensuremathℓ⁺\ensuremathν. We outline how the Higgs triplet model can be explored in such a case at the LHC. By the determination of the mass spectrum, the model can be tested and further distinguished from the other models with doubly-charged scalar bosons.

Citations

• Note on doubly charged Higgs boson pair production at hadron colliders
• Higgs triplets and limits from precision measurements
• Light Minimal Supersymmetric Standard Model Higgs Boson Scenario and its Test at Hadron Colliders
• Distinguishing seesaw models at LHC with multi-lepton signals
• Higgs triplets, decoupling, and precision measurements
• An R-parity conserving radiative neutrino mass model without right-handed neutrinos
• Neutrino masses in SU(2) ⊗ U(1) theories
• Three-flavour neutrino oscillation update
• Neutrino masses and the CERN LHC: Testing the type II seesaw mechanism
• Review of Particle Physics

Cited by

• Revisiting the high-scale validity of the type II seesaw model with novel LHC signature
• Probing doubly charged scalar bosons from the doublet at future high-energy colliders
• Search forδ±±with new decay patterns at the LHC