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Author  |
ATLAS Collaboration (Aad, G. et al); Aikot, A.; Amos, K.R.; Bouchhar, N.; Cabrera Urban, S.; Cantero, J.; Carrion Martinez, C.; Castillo Gimenez, V.; Chitishvili, M.; Costa, M.J.; Curcio, F.; Didenko, M.; Escobar, C.; Fiorini, L.; Fuster, J.; Garcia, C.; Garcia Navarro, J.E.; Gonzalez de la Hoz, S.; Hofer, J.; Jimenez Ortega, M.; Lacasta, C.; Lanzac Berrocal, M.; Marti-Garcia, S.; Martinez Agullo, P.; Melini, D.; Mitsou, V.A.; Monsonis Romero, L.; Moreno Llacer, M.; Munoz Perez, D.; Poveda, J.; Rubio Jimenez, A.; Ruiz-Martinez, A.; Saibel, A.; Salt, J.; Sanchez Sebastian, V.; Senthilkumar, V.; Soldevila, U.; Sanchez, J.; Taylor Vara, R.J.; Torro Pastor, E.; Valero, A.; Valiente Moreno, E.; Valls Ferrer, J.A.; Varriale, L.; Villaplana Perez, M.; Vincent, M.; Vos, M.; Wandall-Christensen, K.; Zakareishvili, T. |
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Title |
Measurement of the top-quark pole mass in dileptonic (t)over-bar+1-jet events at √s=13 TeV with the ATLAS experiment |
Type |
Journal Article |
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Year |
2025 |
Publication |
Journal of High Energy Physics |
Abbreviated Journal |
J. High Energy Phys. |
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Volume |
12 |
Issue |
12 |
Pages |
023 - 51pp |
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Keywords |
Hadron-Hadron Scattering; Top Physics |
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Abstract |
A measurement of the top-quark pole mass m(t)(pole) t is presented in t (t) over bar events with an additional jet, t (t) over bar+ 1-jet, produced in pp collisions at root s = 13TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the LHC, corresponds to an integrated luminosity of 140 fb(-1). Events with one electron and one muon of opposite electric charge in the final state are selected to measure the t (t) over bar+ 1-jet differential cross-section as a function of the inverse of the invariant mass of the t (t) over bar + 1-jet system. Iterative Bayesian Unfolding is used to correct the data to enable comparison with fixed-order calculations at next-to-leading-order accuracy in the strong coupling. The process pp. t (t) over barj (2. 3), where top quarks are taken as stable particles, and the process pp. b (b) over barl+nu l- (nu) over barj (2. 7), which includes top-quark decays to the dilepton final state and off-shell effects, are considered. The top-quark mass is extracted using chi(2) fit of the unfolded normalized differential cross-section distribution. The results obtained with the 2. 3 and 2. 7 calculations are compatible within theoretical uncertainties, providing an important consistency check. The more precise determination is obtained for the 2. 3 measurement: m(t)(pole) = 170.7 +/- 0.3 (stat.)+/- 1.4 (syst.)+/- 0.3 (scale)+/- 0.2 (PDF circle plus alpha(S)) GeV, which is in good agreement with other top-quark mass results. |
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Address |
[Desai, A. M.; Fewell, M. P.; Gallagher, J.; Grant, C. M.; Green, M. J.; Jackson, P.; Kong, A. X. Y.; Kull, J.; Pandya, H. D.; Purnell, H. I.; Ruggeri, T. A.; Saha, S.; Ting, E. X. L.; White, M. J.] Univ Adelaide, Dept Phys, Adelaide, SA, Australia |
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Publisher |
Springer |
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Language |
English |
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Notes |
WOS:001641314200001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7069 |
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