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Type: Journal article
Title: Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in pp collisions at √s = 7 TeV using the ATLAS detector
Other Titles: Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in pp collisions at root s = 7 TeV using the ATLAS detector
Author: The ATLAS Collaboration
Aad, G.
Citation: European Physical Journal C: Particles and Fields, 2014; 74(11):3117-1-3117-27
Publisher: Springer Verlag
Issue Date: 2014
ISSN: 1434-6052
Statement of
G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni ... M. White ... et al. (The ATLAS Collaboration)
Abstract: Additional jet activity in dijet events is measured using pp collisions at ATLAS at a centre-of-mass energy of 7TeV, for jets reconstructed using the anti-kt algorithm with radius parameter R=0.6. This is done using variables such as the fraction of dijet events without an additional jet in the rapidity interval bounded by the dijet subsystem and correlations between the azimuthal angles of the dijet s. They are presented, both with and without a veto on additional jet activity in the rapidity interval, as a function of the scalar average of the transverse momenta of the dijet s and of the rapidity interval size. The double differential dijet cross section is also measured as a function of the interval size and the azimuthal angle between the dijet s. These variables probe differences in the approach to resummation of large logarithms when performing QCD calculations. The data are compared to powheg, interfaced to the pythia 8 and herwig parton shower generators, as well as to hej with and without interfacing it to the ariadne parton shower generator. None of the theoretical predictions agree with the data across the full phase-space considered; however, powheg+pythia 8 and hej+ariadne are found to provide the best agreement with the data. These measurements use the full data sample collected with the ATLAS detector in 7TeVpp collisions at the LHC and correspond to integrated luminosities of 36.1pb−1 and 4.5fb−1 for data collected during 2010 and 2011, respectively.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2014. This article is published with open access at This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0.
RMID: 0030018932
DOI: 10.1140/epjc/s10052-014-3117-7
Appears in Collections:Physics publications

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