Probing Charged Higgs Bosons through H^± → W^± A Decay in the Type-I Two-Higgs Doublet Model

@misc{arhrib2026probing,
  title = {{Probing Charged Higgs Bosons through $H^\pm \to W^\pm A$ Decay in the Type-I Two-Higgs Doublet Model}},
  author = {Abdesslam Arhrib and Mohamed Krab and Tanmoy Mondal and Prasenjit Sanyal},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.36780},
  eprint = {2610.36780},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.36780},
}

TY  - UNPB
TI  - Probing Charged Higgs Bosons through H^± → W^± A Decay in the Type-I Two-Higgs Doublet Model
AU  - Abdesslam Arhrib
AU  - Mohamed Krab
AU  - Tanmoy Mondal
AU  - Prasenjit Sanyal
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2610.36780
UR  - https://arxiv.org/abs/2610.36780
AB  - A light pseudoscalar lighter than the 125 GeV Higgs boson remains allowed within the type-I Two-Higgs Doublet Model (2HDM), consistent with current collider constraints, including Higgs signal strength measurements and direct searches for additional Higgs bosons. At the Large Hadron Collider (LHC), the light pseudoscalar A can be pair-produced through the undetected decay of the Standard Model-like Higgs boson, h_125 → AA, when this channel is kinematically accessible (i.e., m_A < m_h_125/2). For the charged scalar H^±, once open, the bosonic decay channel H^± → W^±(*) A naturally dominates over the fermionic H^± → τ^±ν and H^± → tb channels, while relaxing the existing H^± limits. As a result, we propose searching for the charged Higgs boson through H^± → W^±(*) A in the 4b+2j+ℓν final state. This channel is particularly sensitive to moderate-to-large tanβ values and provides an excellent complementary probe to searches based on fermionic H^± decays at the LHC. Our collider analysis demonstrates that this channel can probe a substantial region of the type-I 2HDM parameter space at the high-luminosity LHC.
ER  -