Aad, G.Aakvaag, E.Abbott, B.Beddall, Andrew JohnÇetin, Serkant AliÖztürk, SertaçŞimşek, SinemUysal, Zekeriya2025-04-182025-04-182024Aad, G., Aakvaag, E., Abbott, B. K., Abeling, K., Abicht, N. J., Abidi, H., ... & Balakrishnan, V. (2024). Evidence for the $ VH, H\rightarrow\tau\tau $ process with the ATLAS detector in Run 2. Phys. Lett. B, 855, 138817.03702693http://dx.doi.org/10.1016/j.physletb.2024.138817https://hdl.handle.net/20.500.12713/6910A 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+ντ) are considered. For the vector bosons, only leptonic decay channels are considered: Z→ℓℓ and W→ℓνℓ, 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 μVHττ=1.28−0.29+0.30(stat.)−0.21+0.25(syst.). This result represents the most accurate measurement of the VH(ττ) process achieved to date. © 2024 The Author(s)eninfo:eu-repo/semantics/openAccessArticle855WOS:0012876093000012-s2.0-85197544419Q110.1016/j.physletb.2024.138817Q1