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Measurement of single top-quark production in association with a W boson in pp collisions at √s=13 TeV with the ATLAS detector
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Measurement of single top-quark production in association with a W boson in pp collisions at √s=13 TeV with the ATLAS detector

G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H. Abramowicz, …
Physical review. D, 卷.110(7), 頁.72010
2024
Web of Science ID: WOS:001381885400001

摘要

Astronomy & Astrophysics Physical Sciences Physics Physics, Particles & Fields Science & Technology
The inclusive cross section for the production of a single top quark in association with a W boson is measured using 140 fb(-1) of proton-proton collision data collected with the ATLAS detector at root s = 13 TeV. Events containing two charged leptons and at least one jet identified as originating from a b-quark are selected. A multivariate discriminant is constructed to separate the tW signal from the t (t) over bar background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be sigma(tW) = 75(-14)(+15) pb, in good agreement with the Standard Model prediction. The measured cross section is used to extract a value for the left-handed form factor at the Wtb vertex times the CabibboKobayashi-Maskawa matrix element vertical bar f(LV)V(tb)vertical bar of 0.97 +/- 0.10.

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https://doi.org/10.1103/PhysRevD.110.072010檢視
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