Measurements of normalized differential cross sections for t(t)over-bar production in pp collisions at root(s)=7 {TeV} using the {ATLAS} detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

Measurements of normalized differential cross sections for top-quark pair production are presented as a function of the top-quark transverse momentum, and of the mass, transverse momentum, and rapidity of the t (t) over bar system, in proton proton collisions at a center-of-mass energy of root s = 7 {TeV}. The data set corresponds to an integrated luminosity of 4.6 fb(-1), recorded in 2011 with the {ATLAS} detector at the {CERN} Large Hadron Collider. Events are selected in the lepton jets channel, requiring exactly one lepton and at least four jets with at least one of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector efficiency and resolution effects and are compared to several Monte Carlo simulations and theory calculations. The results are in fair agreement with the predictions in a wide kinematic range. Nevertheless, data distributions are softer than predicted for higher values of the mass of the t (t) over bar system and of the top-quark transverse momentum. The measurements can also discriminate among different sets of parton distribution functions.
Original languageEnglish
Article number072004
JournalPhysical Review D
Volume90
Issue number7
DOIs
Publication statusPublished - 13 Oct 2014

Keywords

  • PARTON DISTRIBUTIONS
  • ROOT-S=7 TEV
  • FINAL-STATES
  • LEPTON
  • LHC

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