Measurement of the V H, H → ττ process with the ATLAS detector at 13 TeV



Aad, G, Aakvaag, E, Abbott, B, Abeling, K, Abicht, NJ, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y
et al (show 2841 more authors) (2024) Measurement of the V H, H → ττ process with the ATLAS detector at 13 TeV PHYSICS LETTERS B, 855. p. 138817. ISSN 0370-2693, 1873-2445

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Abstract

A measurement of the Standard Model Higgs boson produced in association with a W or Z boson and decaying into a pair of τ-leptons is presented. This search is based on proton-proton collision data collected at s=13 TeV by the ATLAS experiment at the LHC corresponding to an integrated luminosity of 140 fb−1. For the Higgs boson candidate, only final states with at least one τ-lepton decaying hadronically (τ→hadrons+ν<inf>τ</inf>) are considered. For the vector bosons, only leptonic decay channels are considered: Z→ℓℓ and W→ℓν<inf>ℓ</inf>, with ℓ=e,μ. An excess of events over the expected background is found with an observed (expected) significance of 4.2 (3.6) standard deviations, providing evidence of the Higgs boson produced in association with a vector boson and decaying into a pair of τ-leptons. The ratio of the measured cross-section to the Standard Model prediction is μ<inf>VH</inf>ττ=1.28<inf>−0.29</inf>+0.30(stat.)<inf>−0.21</inf>+0.25(syst.). This result represents the most accurate measurement of the VH(ττ) process achieved to date.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 01 Jul 2024 09:32
Last Modified: 23 May 2026 08:56
DOI: 10.1016/j.physletb.2024.138817
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3182563
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