Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at root(s)=7 TeV with the ATLAS detector
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Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at root(s)=7 TeV with the ATLAS detector

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Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at root(s)=7 TeV with the ATLAS detector

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dc.contributor.author ATLAS Collaboration
dc.contributor.author Mitsou, Vasiliki
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author García García, Carmen
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Martí García, Salvador
dc.contributor.author Ros Martínez, Eduardo
dc.contributor.author González de la Hoz, Santiago
dc.contributor.author Salt Cairols, José
dc.contributor.author Valls Ferrer, Juan Antonio
dc.contributor.author Kaci, Mohammed
dc.contributor.author Hernández Jiménez, Yesenia
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Fiorini, Luca
dc.date.accessioned 2014-07-04T11:54:29Z
dc.date.available 2014-07-04T11:54:29Z
dc.date.issued 2012
dc.identifier.uri http://hdl.handle.net/10550/36963
dc.description.abstract Distributions sensitive to the underlying event are studied in events containing one or more chargedparticle jets produced in pp collisions at root s = 7 TeV with the ATLAS detector at the Large Hadron Collider (LHC). These measurements reflect 800 μb(-1) of data taken during 2010. Jets are reconstructed using the anti-k(t) algorithm with radius parameter R varying between 0.2 and 1.0. Distributions of the charged-particle multiplicity, the scalar sum of the transverse momentum of charged particles, and the average charged-particle p(T) are measured as functions of p(T)(jet) in regions transverse to and opposite the leading jet for 4 GeV < p(T)(jet) < 100 GeV. In addition, the R dependence of the mean values of these observables is studied. In the transverse region, both the multiplicity and the scalar sum of the transverse momentum at fixed p(T)(jet) vary significantly with R, while the average charged- particle transverse momentum has a minimal dependence on R. Predictions from several Monte Carlo tunes have been compared to the data; the predictions from Pythia 6, based on tunes that have been determined using LHC data, show reasonable agreement with the data, including the dependence on R. Comparisons with other generators indicate that additional tuning of soft-QCD parameters is necessary for these generators. The measurements presented here provide a testing ground for further development of the Monte Carlo models.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2012, vol. 86, num. 7, p. 072004-1-072004-34
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source ATLAS Collaboration Mitsou, Vasiliki Fuster Verdú, Juan A. Ferrer Soria, Antonio Cabrera Urbán, Susana García García, Carmen Castillo Giménez, María Victoria Higón Rodríguez, Emilio Martí García, Salvador Ros Martínez, Eduardo González de la Hoz, Santiago Salt Cairols, José Valls Ferrer, Juan Antonio Kaci, Mohamed Hernández Jiménez, Yesenia Lacasta Llácer, Carlos Fiorini, Luca 2012 Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at root(s)=7 TeV with the ATLAS detector Physical Review D 86 7 072004-1 072004-34
dc.subject Física nuclear
dc.subject Partícules (Física nuclear)
dc.subject Acceleradors de partícules
dc.title Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at root(s)=7 TeV with the ATLAS detector
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-07-04T11:54:29Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.86.072004
dc.identifier.idgrec 083488

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