Measurement of Dijet Cross-Sections in pp Collisions at 7 TeV Centre-of-Mass Energy Using the ATLAS Detector

DSpace/Manakin Repository

Measurement of Dijet Cross-Sections in pp Collisions at 7 TeV Centre-of-Mass Energy Using the ATLAS Detector

Show full item record

Title: Measurement of Dijet Cross-Sections in pp Collisions at 7 TeV Centre-of-Mass Energy Using the ATLAS Detector
Author(s):
Aad, G.;
Abajyan, T.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Ashan, Mahsana;
Haleem, M.;
Izen, Joseph M.;
Lou, Xinchou;
Namasivayam, Harisankar;
Reeves, Kendall;
Wong, Wei-Cheng;
ATLAS Collaboration
Date Created: 2014-05-014
Format: Text
Item Type: Article
Keywords: Show Keywords
Abstract: Double-differential dijet cross-sections measured in pp collisions at the LHC with a 7 TeV centre-of-mass energy are presented as functions of dijet mass and half the rapidity separation of the two highest-p₋T jets. These measurements are obtained using data corresponding to an integrated luminosity of 4.5 fb⁻¹, recorded by the ATLAS detector in 2011. The data are corrected for detector effects so that cross-sections are presented at the particle level. Cross-sections are measured up to 5 TeV dijet mass using jets reconstructed with the anti-k₋t algorithm for values of the jet radius parameter of 0.4 and 0.6. The cross-sections are compared with next-to-leading-order perturbative QCD calculations by NLOJet++ corrected to account for non-perturbative effects. Comparisons with POWHEG predictions, using a next-to-leading-order matrix element calculation interfaced to a parton-shower Monte Carlo simulation, are also shown. Electroweak effects are accounted for in both cases. The quantitative comparison of data and theoretical predictions obtained using various parameterizations of the parton distribution functions is performed using a frequentist method. In general, good agreement with data is observed for the NLOJet++ theoretical predictions when using the CT10, NNPDF2.1 and MSTW 2008 PDF sets. Disagreement is observed when using the ABM11 and HERAPDF1.5 PDF sets for some ranges of dijet mass and half the rapidity separation. An example setting a lower limit on the compositeness scale for a model of contact interactions is presented, showing that the unfolded results can be used to constrain contributions to dijet production beyond that predicted by the Standard Model.
Publisher: Springer
ISSN: 1029-8479
Source: Journal of High Energy Physics
Link to Related Resource: http://dx.doi.org/10.1007/JHEP05(2014)059
Persistent Link: http://hdl.handle.net/10735.1/4045
Bibliographic Citation: Aad, G., T. Abajyan, B. Abbott, J. Abdallah, et al. 2014. "Measurement of dijet cross-sections in pp collisions at 7 TeV centre-of-mass energy using the ATLAS detector." Journal of High Energy Physics: 5(59), doi:10.1007/JHEP05(2014)059
Terms of Use: CC BY 4.0 (Attribution)
© 2014 CERN for the benefit of the ATLAS Collaboration

Files in this item

Files Size Format View
NSM-2305-6284.27.pdf 905.2Kb PDF View/Open Article

This item appears in the following Collection(s)


Show full item record

CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)