Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
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Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

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Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

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dc.contributor.author ATLAS Collaboration
dc.contributor.author Mitsou, Vasiliki
dc.contributor.author Ros Martínez, Eduardo
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Martí García, Salvador
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Fiorini, Luca
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author García García, Carmen
dc.contributor.author González de la Hoz, Santiago
dc.contributor.author Hernández Jiménez, Yesenia
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Villaplana Pérez, Miguel
dc.contributor.author Salt Cairols, José
dc.date.accessioned 2014-06-05T11:38:45Z
dc.date.available 2014-06-05T11:38:45Z
dc.date.issued 2011
dc.identifier.uri http://dx.doi.org/10.1140/epjc/s10052-011-1846-4
dc.identifier.uri http://hdl.handle.net/10550/35917
dc.description.abstract The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb(-1). The b-jets are identified using either a lifetime-based method, where secondary decay vertices of b-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of b-hadrons inside jets. The inclusive b-jet cross-section is measured as a function of transverse momentum in the range 20 < p(T) < 400 GeV and rapidity in the range vertical bar y vertical bar < 2.1. The b<(b)over bar>-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < m(jj) < 760 GeV, the azimuthal angle difference between the two jets and the angular variable chi in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured cross-sections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured b (b) over bar -dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.
dc.relation.ispartof European Physical Journal C, 2011, vol. 71, num. 12-1846, p. 1-22
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source ATLAS Collaboration Mitsou, Vasiliki Ros Martínez, Eduardo Cabrera Urbán, Susana Castillo Giménez, María Victoria Lacasta Llácer, Carlos Martí García, Salvador Ferrer Soria, Antonio Fiorini, Luca Fuster Verdú, Juan A. Garcia García Carmen Gonzalez de la Hoz, Santiago Hernández Jiménez, Yesenia Higón Rodríguez, Emilio Villaplana Pérez, Miguel Salt Cairols, José 2011 Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector European Physical Journal C 71 12-1846 1 22
dc.subject Detectors de radiació
dc.subject Acceleradors de partícules
dc.title Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-06-05T11:38:45Z
dc.identifier.doi http://dx.doi.org/10.1140/epjc/s10052-011-1846-4
dc.identifier.idgrec 070116

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