TY - JOUR
T1 - Measurement of the inclusive tt¯ 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
AU - CMS Collaboration
AU - Anthony, D.
AU - Brooke, Jim
AU - Bundock, Aaron
AU - Bury, Florian J J
AU - Clement, Emyr J
AU - Cussans, David G
AU - Flächer, H.
AU - Glowacki, Maciej
AU - Goldstein, Joel
AU - Heath, Helen F
AU - Holmberg, Mei-Li
AU - Kreczko, Lukasz
AU - Paramesvaran, Sudarshan
AU - Robertshaw, Liam
AU - Seif El Nasr, Sarah A
AU - Smith, Vincent J
AU - Stylianou, Nicolas
AU - Walkingshaw Pass, Katie L M R
N1 - Publisher Copyright:
© The Author(s) 2025.
PY - 2025/4/15
Y1 - 2025/4/15
N2 - A measurement of the top quark pair (tt¯) production cross section in proton-proton 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.
AB - A measurement of the top quark pair (tt¯) production cross section in proton-proton 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.
U2 - 10.1007/JHEP04(2025)099
DO - 10.1007/JHEP04(2025)099
M3 - Article (Academic Journal)
SN - 1029-8479
VL - 2025
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 4
M1 - 99
ER -