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⁢ tbar background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be sigma t W = 7⁢5 + 15 - 14  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 Cabibbo-Kobayashi-Maskawa matrix element mod(fLV Vtb) of 0.97 +- 0.10.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. ., et al. (2024). Measurement of single top-quark production in association with a W boson in pp collisions at root s = 13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 110(7) [10.1103/physrevd.110.072010].

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

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;
2024-01-01

Abstract

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⁢ tbar background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be sigma t W = 7⁢5 + 15 - 14  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 Cabibbo-Kobayashi-Maskawa matrix element mod(fLV Vtb) of 0.97 +- 0.10.
2024
Pubblicato
Rilevanza internazionale
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Esperti anonimi
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
Top quark production
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. ., et al. (2024). Measurement of single top-quark production in association with a W boson in pp collisions at root s = 13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 110(7) [10.1103/physrevd.110.072010].
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, N ; Abidi, S ; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Ac...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/388808
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