Электронный каталог

Статья

Aad, G.
Measurements of W*+W*- Production Cross-Sections in pp Collisions at *%s=13 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, Y.Kulchitsky, [ATLAS Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 8. – P. 142. – URL: https://doi.org/10.1007/JHEP08(2025)142. – Bibliogr.: 145.

Measurements of W*+W*− → e&sup(±)νµ&sup(∓)ν production cross-sections are presented, providing a test of the predictions of perturbative quantum chromodynamics and the electroweak theory. The measurements are based on data from pp collisions at √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015–2018, corresponding to an integrated luminosity of 140 fb&sup(−1) . The number of events due to top-quark pair production, the largest background, is reduced by rejecting events containing jets with b-hadron decays. An improved methodology for estimating the remaining top-quark background enables a precise measurement of W*+W*− cross-sections with no additional requirements on jets. The fiducial W*+W*− cross-section is determined in a maximum-likelihood ft with an uncertainty of 3.1%. The measurement is extrapolated to the full phase space, resulting in a total W*+W*− cross-section of 127 ± 4 pb. Diferential cross-sections are measured as a function of twelve observables that comprehensively describe the kinematics of W*+W*− events. The measurements are compared with state-of-the-art theory calculations and excellent agreement with predictions is observed. A charge asymmetry in the lepton rapidity is observed as a function of the dilepton invariant mass, in agreement with the Standard Model expectation. A CP-odd observable is measured to be consistent with no CP violation. Limits on Standard Model efective feld theory Wilson coefcients in the Warsaw basis are obtained from the diferential cross-sections.



ОИЯИ = ОИЯИ (JINR)2025