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Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at s=13 TeVSirunyan, A.M.Tumasyan, A.Adam, W.Ambrogi, F.Bergauer, T.Dragicevic, M.Erö, J.Escalante Del Valle, A.Frühwirth, R.Jeitler, M.Krammer, N.Lechner, L.Liko, D.Madlener, T.Mikulec, I.Pitters, F.M.Rad, N.Schieck, J.Schöfbeck, R.Spanring, M.Templ, S.Waltenberger, W.Wulz, C.-E.Zarucki, M.Chekhovsky, V.Litomin, A.Makarenko, V.Suarez Gonzalez, J.Darwish, M.R.De Wolf, E.A.Di Croce, D.Janssen, X.Kello, T.Lelek, A.Pieters, M.Rejeb Sfar, H.Van Haevermaet, H.Van Mechelen, P.Van Putte, S.Van Remortel, N.Blekman, F.Bols, E.S.Chhibra, S.S.D'Hondt, J.De Clercq, J.Lontkovskyi, D.Lowette, S.Marchesini, I.Moortgat, S.Morton, A.CMSDibosonElectroweakLongitudinalPolarizedThe first measurements of production cross sections of polarized same-sign W±W± boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 137fb−1. Events are selected by requiring exactly two same-sign leptons, electrons or muons, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass to enhance the contribution of same-sign W±W± scattering events. An observed (expected) 95% confidence level upper limit of 1.17 (0.88) fbis set on the production cross section for longitudinally polarized same-sign W±W± boson pairs. The electroweak production of same-sign W±W± boson pairs with at least one of the W bosons longitudinally polarized is measured with an observed (expected) significance of 2.3 (3.1) standard deviations. © 2020 The Author(s)Elsevier B.V.2021Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/13431https://doi.org/10.1016/j.physletb.2020.1360180370-2693enPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/13431