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Study of same-sign W boson scattering and anomalous couplings in events with one tau lepton from pp collisions at TeVHayrapetyan, A.Tumasyan, A.Adam, W.Andrejkovic, J.W.Bergauer, T.Chatterjee, S.Damanakis, K.Dragicevic, M.Hussain, P.S.Jeitler, M.Krammer, N.Li, A.Liko, D.Mikulec, I.Schieck, J.Schöfbeck, R.Schwarz, D.Sonawane, M.Waltenberger, W.Wulz, C.-E.Janssen, T.Van Laer, T.Van Mechelen, P.Breugelmans, N.D’Hondt, J.Dansana, S.De Moor, A.Delcourt, M.Heyen, F.Lowette, S.Makarenko, I.Müller, D.Tavernier, S.Tytgat, M.Van Onsem, G.P.Van Putte, S.Vannerom, D.Bilin, B.Clerbaux, B.Das, A.K.De Lentdecker, G.Evard, H.Favart, L.Gianneios, P.Jaramillo, J.Khalilzadeh, A.Khan, F.A.Lee, K.Mahdavikhorrami, M.Malara, A.Hadron-Hadron ScatteringVector Boson ProductionA first study is presented of the cross section for the scattering of same-sign W boson pairs via the detection of a τ lepton. The data from proton-proton collisions at the center-of-mass energy of 13 TeV were collected by the CMS detector at the LHC, and correspond to an integrated luminosity of 138 fb−1. Events were selected that contain two jets with large pseudorapidity and large invariant mass, one τ lepton, one light lepton (e or μ), and significant missing transverse momentum. The measured cross section for electroweak same-sign WW scattering is times the standard model prediction. In addition, a search is presented for the indirect effects of processes beyond the standard model via the effective field theory framework, in terms of dimension-6 and dimension-8 operators. © The Author(s) 2025.Springer Science and Business Media Deutschland GmbH2025Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/10754https://doi.org/10.1007/jhep10(2025)2191029-8479enJournal of High Energy Physicsinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/10754