A measurement of the top quark pair (t¯t) production cross section in protonproton collisions at a centre-of-mass energy of 5.02 TeV is presented. The data were collected at the LHC in autumn 2017, in dedicated runs with low-energy and low-intensity conditions with respect to the default configuration, and correspond to an integrated luminosity of 302 pb−1 . The measurement is performed using events with one electron or muon, and multiple jets, at least one of them being identified as originating from a b quark (b tagged). Events are classified based on the number of all reconstructed jets and of b-tagged jets. Multivariate analysis techniques are used to enhance the separation between the signal and backgrounds. The measured cross section is 62.5 ± 1.6 (stat)+2.6 −2.5 (syst) ± 1.2 (lumi) pb. A combination with the result in the dilepton channel based on the same data set yields a value of 62.3±1.5 (stat)±2.4 (syst)±1.2 (lumi) pb, to be compared with the standard model prediction of 69.5 +3.5 −3.7 pb at next-to-next-to-leading order in perturbative quantum chromodynamics.

Null, N., Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., et al. (2025). Measurement of the inclusive t¯t cross section in final states with at least one lepton and additional jets with 302 pb−1 of pp collisions at √s = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2025(4), 0-43 [10.1007/jhep04(2025)099].

Measurement of the inclusive t¯t cross section in final states with at least one lepton and additional jets with 302 pb−1 of pp collisions at √s = 5.02 TeV

Battilana, C.;Bonacorsi, D.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Lorusso, M.;Paggi, G.;Rossi Tisbeni, S.;Rovelli, T.;Siroli, G. P.;
2025

Abstract

A measurement of the top quark pair (t¯t) production cross section in protonproton collisions at a centre-of-mass energy of 5.02 TeV is presented. The data were collected at the LHC in autumn 2017, in dedicated runs with low-energy and low-intensity conditions with respect to the default configuration, and correspond to an integrated luminosity of 302 pb−1 . The measurement is performed using events with one electron or muon, and multiple jets, at least one of them being identified as originating from a b quark (b tagged). Events are classified based on the number of all reconstructed jets and of b-tagged jets. Multivariate analysis techniques are used to enhance the separation between the signal and backgrounds. The measured cross section is 62.5 ± 1.6 (stat)+2.6 −2.5 (syst) ± 1.2 (lumi) pb. A combination with the result in the dilepton channel based on the same data set yields a value of 62.3±1.5 (stat)±2.4 (syst)±1.2 (lumi) pb, to be compared with the standard model prediction of 69.5 +3.5 −3.7 pb at next-to-next-to-leading order in perturbative quantum chromodynamics.
2025
Null, N., Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., et al. (2025). Measurement of the inclusive t¯t cross section in final states with at least one lepton and additional jets with 302 pb−1 of pp collisions at √s = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2025(4), 0-43 [10.1007/jhep04(2025)099].
Null, Null; Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1044058
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