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Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in $$pp$$ p p collisions at $$\sqrts=7\,\mathrmTeV$$ s = 7 TeV using the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
GIORDANI, Mario
2014
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
Additional jet activity in dijet events is measured using pp collisions at ATLAS at a centre-of-mass energy of 7 TeV, for jets reconstructed using the anti-ktalgorithm 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 7TeV pp collisions at the LHC and correspond to integrated luminosities of 36.1 pb-1and 4.5fb-1for data collected during 2010 and 2011, respectively.
DOI
10.1140/epjc/s10052-014-3117-7
WOS
WOS:000347169900001
Archivio
http://hdl.handle.net/11390/1109917
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84920119659
Diritti
metadata only access
Scopus© citazioni
36
Data di acquisizione
Jun 2, 2022
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Web of Science© citazioni
33
Data di acquisizione
Mar 22, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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