Measurements of normalized differential cross sections for t t ¯ production in p p collisions at √ ( s ) = 7 TeV using the ATLAS detector
Name
PhysRevD.90.072004.pdf
Description
Published version
Size
1.13 MB
Format
Adobe PDF
Checksum (MD5)
3ba56c17a78501148e06d3b86eaf6827
Author(s)
Taylor, Frank E.
Sciolla, Gabriella
Date Issued
October 13, 2014
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aad, G., et al. "Measurements of Normalized Differential Cross Sections for T(T)over-Bar Production in Pp Collisions at Root(S)=7 Tev Using the Atlas Detector." Physical Review D 90 7 (2014).
Version
Final published version
Abstract
© Published by the American Physical Society. 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 system, in proton-proton collisions at a center-of-mass energy of √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 system and of the top-quark transverse momentum. The measurements can also discriminate among different sets of parton distribution functions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1103/physrevd.90.072004
