Search for a light CP-odd Higgs boson decaying into a pair of τ -leptons in proton-proton collisions at √s = 13 TeV 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, C. Leonidopoulos, M. Firdaus M. Soberi, V. J. Martin, L. Mijović, V.A. Parrish, E.A. Pender, T. Qiu, J.M. Silva, A.L. SopioF. Ustuner, E.M. Villhauer, H. Watson, B.M. Wynne, Z. Xu, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract

This paper reports a search for a light CP-odd scalar resonance with a mass
of 20 GeV to 90 GeV in 13 TeV proton-proton collision data with an integrated luminosity of 140 fb−1 collected with the ATLAS detector at the Large Hadron Collider. The analysis assumes the resonance is produced via gluon-gluon fusion and decays into a τ +τ − pair which subsequently decays into a fully leptonic μ+νμ ¯ντ e− ¯νeντ or e+νe ¯ντ μ− ¯νμντ final state. No significant excess of events above the predicted Standard Model background is observed. The results are interpreted within a flavour-aligned two-Higgs-doublet model, and a model-independent cross-section interpretation is also given. Upper limits at 95% confidence level between 3.0 pb and 68 pb are set on the cross-section for producing a CP-odd Higgs boson that decays into a τ +τ − pair.
Original languageEnglish
Article number126
Pages (from-to)1-50
Number of pages50
JournalJournal of High Energy Physics
Volume2024
Issue number12
DOIs
Publication statusPublished - 17 Dec 2024

Keywords / Materials (for Non-textual outputs)

  • Hadron-Hadron Scattering
  • Higgs Physics

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