Measurements of Normalized Differential Cross Sections for tt̅ Production in pp Collisions at √s = 7 TeV using the ATLAS Detector

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Measurements of Normalized Differential Cross Sections for tt̅ Production in pp Collisions at √s = 7 TeV using the ATLAS Detector

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Title: Measurements of Normalized Differential Cross Sections for tt̅ Production in pp Collisions at √s = 7 TeV using the ATLAS Detector
Author(s):
Aad, G.;
Abajyan, T.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Izen, Joseph M.;
Leyton, Michael;
Lou, Xinchou;
Namasivayam, Harisankar;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2014-10-13
Format: Text
Item Type: Article
Keywords: Show Keywords
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 tt̅ 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 tt̅ system and of the top-quark transverse momentum. The measurements can also discriminate among different sets of parton distribution functions.
Publisher: American Physical Society
ISSN: 1550-7998
Source: Physical Review D
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.90.072004
Persistent Link: http://hdl.handle.net/10735.1/4266
Bibliographic Citation: Aad, G., T. Abajyan, B. Abbott, J. Abdallah, et al. 2014. "Measurements of normalized differential cross sections for tt̅ production in pp collisions at √s̅ = 7 TeV using the ATLAS detector." Physical Review D 90(7), doi:10.1103/PhysRevD.90.072004
Terms of Use: CC BY 3.0 (Attribution)
©2014 CERN for the ATLAS Collaboration

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CC BY 3.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 3.0 (Attribution)