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 √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 𝑡⁢𝑊 signal from the 𝑡⁢ ¯ 𝑡 background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be 𝜎𝑡⁢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 𝑊⁢𝑡⁢𝑏 vertex times the Cabibbo-Kobayashi-Maskawa matrix element |𝑓LV⁡𝑉𝑡⁢𝑏| of 0.97 ±0.10.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., et al. (2024). Measurement of single top-quark production in association with a 𝑊 boson in 𝑝⁢𝑝 collisions at √𝑠 =13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 110(7), 072010-1-072010-30 [10.1103/physrevd.110.072010].

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

Alfonsi, F.;Ballabene, E.;Bellagamba, L.;Bianco, G.;Boscherini, D.;Bruni, A.;Carratta, G.;Corchia, F.  A.;Cremonini, D.;De Castro, S.;Fabbri, F.;Fabbri, L.;Franchini, M.;Gabrielli, A.;Giacobbe, B.;Lasagni Manghi, F.;Levrini, G.;Nechaeva, S.;Polini, A.;Rinaldi, L.;Romano, M.;Sanzani, E.;Sbarra, C.;Sbrizzi, A.;Semprini-Cesari, N.;Sioli, M.;Todome, K.;Valentinetti, S.;Villa, M.;Vittori, C.;Vivarelli, I.;Zoccoli, A.;
2024

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 √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 𝑡⁢𝑊 signal from the 𝑡⁢ ¯ 𝑡 background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be 𝜎𝑡⁢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 𝑊⁢𝑡⁢𝑏 vertex times the Cabibbo-Kobayashi-Maskawa matrix element |𝑓LV⁡𝑉𝑡⁢𝑏| of 0.97 ±0.10.
2024
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., et al. (2024). Measurement of single top-quark production in association with a �� boson in ��⁢�� collisions at √�� =13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 110(7), 072010-1-072010-30 [10.1103/physrevd.110.072010].
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N.  j.; Abidi, S.  h.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1040381
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