Measurement of the inclusive <i>tt¯</i> production cross section in the lepton+jets channel in <i>pp </i>collisions at √s=7 TeV with the ATLAS detector using support vector machines

ATLAS Collaboration

doi:10.1103/physrevd.108.032014

Scientific article

English

Measurement of the inclusive tt¯ production cross section in the lepton+jets channel in pp collisions at √s=7 TeV with the ATLAS detector using support vector machines

ContributorsATLAS Collaboration

Published inPhysical review. D, vol. 108, no. 3, 032014

Publication date2023

First online date2023-08-18

Abstract

A measurement of the top quark pair-production cross section in the lepton+jets decay channel is presented. It is based on 4.6 fb-1 of s=7 TeV pp collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. A three-class, multidimensional event classifier based on support vector machines is used to differentiate tt¯ events from backgrounds. The tt¯ production cross section is found to be σtt¯=168.5±0.7(stat) -5.9+6.2(syst) -3.2+3.4(lumi) pb. The result is consistent with the Standard Model prediction based on QCD calculations at next-to-next-to-leading order.

Keywords

Top, pair production
Higher-order, 2
Lepton
P p: colliding beams
Top: pair production
P p: scattering
Final state: ((n)jet lepton)
ATLAS
TeV
Quantum chromodynamics
Quantum chromodynamics: perturbation theory
Perturbation theory: higher-order
Higher-order: 2
CERN Lab
Higher-dimensional
CERN LHC Coll
Background
Channel cross section: measured
Experimental results
7000 GeV-cms

Affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

ATLAS Collaboration. Measurement of the inclusive tt¯ production cross section in the lepton+jets channel in pp collisions at √s=7 TeV with the ATLAS detector using support vector machines. In: Physical review. D, 2023, vol. 108, n° 3, p. 032014. doi: 10.1103/physrevd.108.032014