Measurements and interpretations of W ± Z production cross-sections in pp collisions at s = 13 TeV with the ATLAS detector

Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, NJ; Abidi, SH; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y; Acharya, BS; Ackermann, A; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Aggarwal, A; Barr, AJ; Bortoletto, D; Bruckler, TL; Chen, M; Conroy, EI; Cooper-Sarkar, AM; Dingley, T; Eberwein, GH; Frost, JA; Gallas, EJ; Grabarczyk, RP; Gwenlan, C; Haslbeck, F; Hays, CP; Hodkinson, BH; Homsak, V; Huffman, TB; Koch, SF; Molinatti, U; Nagai, K; Nedic, L; Nickerson, RB; Pacey, HA; Qichen, D; Rossi, E; Ruggiero, A; Shipsey, IPJ; Sultan, DMS; Tuncay, SB; Viehhauser, GHA; Wang, WT; Weidberg, AR; Yildirim, TP

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Journal article

Measurements and interpretations of W ± Z production cross-sections in pp collisions at s = 13 TeV with the ATLAS detector

Abstract:: Measurements of integrated and differential cross-sections for W±Z production in proton-proton collisions are presented. The data collected by the ATLAS detector at the Large Hadron Collider from 2015 to 2018 at a centre-of-mass energy of s=13 TeV are used, corresponding to an integrated luminosity of 140 fb−1. The W±Z candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons or muons. The integrated cross-section per lepton flavour for the production of W±Z is measured in the detector fiducial region with a relative precision of 4%. The measured value is compared with the Standard Model prediction at a precision of up to next-to-next-to-leading-order in QCD and next-to-leading-order in electroweak. Cross-sections for W+Z and W−Z production and their ratio are presented. The W±Z production is also measured differentially as functions of various kinematic variables, including new observables sensitive to CP-violation effects. All measurements are compared with state-of-the-art Standard Model predictions from fixed-order calculations or Monte Carlo generators based on next-to-leading-order matrix elements interfaced with parton showers. An effective field theory interpretation of the measurements is performed, considering both CP-conserving and CP-violating dimension-6 operators modifying the W±Z production. In the absence of observed deviations from the Standard Model, limits on CP-conserving Wilson coefficients are extracted using the transverse mass of the W±Z system. For CP-violating coefficients a machine learning approach is used to construct an observable with enhanced sensitivity to CP-violation effects.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B. S., Ackermann, A., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. V., Addison, M. J., Adelman, J., Adiguzel, A., … Yildirim, T. P. (2025). Measurements and interpretations of W ± Z production cross-sections in pp collisions at s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2025(11).

MLA Style

Aad, G, et al. “Measurements and Interpretations of W ± Z Production Cross-Sections in Pp Collisions at s = 13 TeV with the ATLAS Detector.” Journal of High Energy Physics, vol. 2025, no. 11, 2025.

Chicago Style

Aad, G, E Aakvaag, B Abbott, et al. 2025. “Measurements and Interpretations of W ± Z Production Cross-Sections in Pp Collisions at s = 13 TeV with the ATLAS Detector.” Journal of High Energy Physics 2025 (11).
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