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Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in $pp$ collisions at $\sqrt{s}=7\,\mathrm{TeV}$ using the ATLAS detector

dc.contributor.authorATLAS collaboration (2887 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorDo Valle Wemans, André
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorMarques, Carlos
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T04:26:45Z
dc.date.available2019-02-04T04:26:45Z
dc.date.issued2014-10-31
dc.date.updated2019-02-04T04:26:45Z
dc.description.abstractAdditional jet activity in dijet events is measured using ${pp}$ collisions at ATLAS at a centre-of-mass energy of $7\,\mathrm{TeV}$ , for jets reconstructed using the ${\mathrm{anti}\hbox {-}{k_t}}$ 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 $7\,\mathrm{TeV}$ ${pp}$ collisions at the LHC and correspond to integrated luminosities of $36.1\,\mathrm{pb}^{-1}$ and $4.5\,\mathrm{fb}^{-1}$ for data collected during 2010 and 2011, respectively.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C74 (2014) 3117; DOI 10.1140/epjc/s10052-014-3117-7
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-014-3117-7
dc.identifier.urihttp://hdl.handle.net/10400.26/26651
dc.language.isoeng
dc.titleMeasurements of jet vetoes and azimuthal decorrelations in dijet events produced in $pp$ collisions at $\sqrt{s}=7\,\mathrm{TeV}$ using the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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