Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via in 13 TeV collisions with the ATLAS detector

ATLAS Collaboration, S. Alderweireldt, J.F. Allen, P. J. Clark, J.R. Curran, D. Duda, S. M. Farrington, Y. Gao, J.M. Gargan, R.Y. Gonzalez Andana, C. Jiang, M. Firdaus M. Soberi, V. J. Martin, L. Mijović, E.A. Pender, T. Qiu, J.M. Silva, E.M. Villhauer, B.M. Wynne, Z. Xu

Research output: Contribution to journal β€Ί Article β€Ί peer-review

Abstract

Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via , are searched for in of proton-proton collision data at recorded with the ATLAS detector. Depending on whether the top quark is produced together with the 𝐻± decays hadronically or semileptonically, the search targets 𝜏 +jets or 𝜏 +lepton final states, in both cases with a 𝜏-lepton decaying into a neutrino and hadrons. No significant excess over the Standard Model background expectation is observed. For the mass range of 80 β‰€π‘šπ»Β± ≀3000  GeV, upper limits at 95% confidence level are set on the production cross section of the charged Higgs boson times the branching fraction ℬ⁑(𝐻± β†’πœΒ±β’πœˆπœ) in the range 4.5 pb–0.4 fb. In the mass range 80–160 GeV, assuming the Standard Model cross section for 𝑑⁒¯𝑑
production, this corresponds to upper limits between 0.27% and 0.02% on ℬ⁑(𝑑 →𝑏⁒𝐻±) ×ℬ⁑(𝐻± β†’πœΒ±β’πœˆπœ).
Original languageEnglish
Article number072006
Pages (from-to)1-31
Number of pages31
JournalPhysical Review D
Volume111
Issue number7
Early online date1 Apr 2025
DOIs
Publication statusPublished - 9 Apr 2025

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