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Measurements of electroweak π‘Šβˆ§Β±π‘ boson pair production in association with two jets in 𝑝𝑝 collisions at √s = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Adelman, J.; Adiguzel, A.; Adye, T.; Affolder, A. A.; Afik, Y.; Agaras, M. N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Ahmad, A.; Ahmadov, F.; Ahmed, W. S.; Ahuja, S.; Ai, X.; Aielli, G.; Aikot, A.; Ait Tamlihat, M.; Aitbenchikh, B.; Akbiyik, M.; Γ…kesson, T. P. A.; Akimov, A. V.; Akiyama, D.; Al Khoury, Konie

Measurements of integrated and differential cross-sections for electroweak WΒ±Z production in association with two jets (π‘Šβˆ§Β±π‘π‘—π‘—) 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 π‘Šβˆ§Β±π‘π‘—π‘— candidate events are reconstructed using leptonic decay modes of the gauge bosons. Events containing three identified leptons, either electrons or muons, and two jets are selected.

Processes involving pure electroweak π‘Šβˆ§Β±π‘π‘—π‘— production at Born level are separated from π‘Šβˆ§Β±π‘π‘—π‘— production involving a strong coupling. The measured integrated fiducial cross-section of electroweak π‘Šβˆ§Β±π‘π‘—π‘— production per lepton flavour is 𝜎_(π‘ŠZjjβˆ’EW→𝓁′𝓋𝓁𝓁𝒿𝒿) = 0.368 Β± 0.037 (stat.) Β± 0.059 (syst.) Β± 0.003 (lumi.) fb, where 𝓁 and 𝓁′ are either an electron or a muon. Respective cross-sections of electroweak and strong π‘Šβˆ§Β±π‘π‘—π‘— production are measured separately for events with exactly two jets or with more than two jets, and in three bins of the invariant mass of the two jets.

The inclusive π‘Šβˆ§Β±π‘π‘—π‘— production cross-section, without separating electroweak and strong production, is also measured to be 𝜎_(π‘ŠZjj→𝓁′𝓋𝓁𝓁𝒿𝒿) = 1.462 Β± 0.063 (stat.) Β± 0.118 (syst.) Β± 0.012 (lumi.) fb, per lepton flavour. The inclusive π‘Šβˆ§Β±π‘π‘—π‘— production cross-section is measured differentially for several kinematic observables. Finally, the measurements are used to constrain anomalous quartic gauge couplings by extracting 95% confidence level intervals on dimension-8 operators.

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Also Published In

Title
Journal of High Energy Physics
DOI
https://doi.org/10.1007/JHEP06(2024)192

More About This Work

Academic Units
Physics
Published Here
January 29, 2025

Notes

Beyond Standard Model, Hadron-Hadron Scattering, Proton-Proton Scattering, Vector Boson Production

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