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Measurement of t-channel single-top-quark production in pp collisions at s=5.02 TeV with the ATLAS detector
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Date Issued
2024-07-01
Author(s)
Aad, G.
Abbott, B.
Abeling, K.
Abicht, N. J.
Abidi, S. H.
Aboulhorma, A.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B. S.
Adam Bourdarios, C.
Adamczyk, L.
Adamek, 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.
Aizenberg, I.
Akbiyik, M.
Åkesson, T. P.A.
Akimov, A. V.
Akiyama, D.
Akolkar, N. N.
Al Khoury, K.
Alberghi, G. L.
Albert, J.
Albicocco, P.
Albouy, G. L.
Alderweireldt, S.
Aleksa, M.
Aleksandrov, I. N.
Alexa, C.
Alexopoulos, T.
Alfonsi, F.
Algren, M.
Alhroob, M.
Ali, B.
Ali, H. M.J.
Ali, S.
Alibocus, S. W.
Aliev, M.
Alimonti, G.
Alkakhi, W.
Allaire, C.
Allbrooke, B. M.M.
Allen, J. F.
Allendes Flores, C. A.
Allport, P. P.
Aloisio, A.
Alonso, F.
Alpigiani, C.
Alvarez Estevez, M.
Alvarez Fernandez, A.
Alves Cardoso, M.
Alviggi, M. G.
Aly, M.
Amaral Coutinho, Y.
Ambler, A.
Amelung, C.
Amerl, M.
Ames, C. G.
Amidei, D.
Amor Dos Santos, S. P.
Amos, K. R.
Ananiev, V.
Anastopoulos, C.
Andeen, T.
Anders, J. K.
Andrean, S. Y.
Andreazza, A.
Angelidakis, S.
Angerami, A.
Anisenkov, A. V.
Annovi, A.
Antel, C.
Anthony, M. T.
Antipov, E.
Antonelli, M.
Anulli, F.
Aoki, M.
Aoki, T.
Aparisi Pozo, J. A.
Aparo, M. A.
Aperio Bella, L.
Fernandez Luengo, S.I.
Carolina Robles Gajardo
Abstract
The observation of the electroweak production of single-top-quarks is made using 255 pb−1 of proton-proton collision data recorded at s√=5.02 TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single-top-quark candidates arising from t-channel production with the top quark decaying semi-leptonically. Events passing the selection are then used to measure the inclusive cross-section for the combined production of single-top-quarks and antiquarks, σ(tq+t¯q), and the ratio Rt between these two. They are measured to be σ(tq+t¯q)=27.1+4.4−4.1(stat.)+4.4−3.7(syst.) pb and Rt=2.73+1.43−0.82(stat.)+1.01−0.29(syst.). The individual single-top-quark (tq) and single-top-antiquark (t¯q) production cross-sections are measured to be σ(tq)=19.8+3.9−3.1(stat.)+2.9−2.2(syst.) pb and σ(t¯q)=7.3+3.2−2.1(stat.)+2.8−1.5(syst.) pb. All measurements are in good agreement with the Standard Model predictions.
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