723 articles – 3326 Notices  [english version]
 HAL : in2p3-00704527, version 1
 XX International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2012, Bonn : Allemagne (2012)
 Measurements with ATLAS detector of jets containing charm and bottom quarks
 ATLAS Collaboration(s)
 (2012)
 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. 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. The bbbar-dijet cross-section is measured as a function of the dijet invariant mass, the azimuthal angle difference between the two jets, and the angular variable chi in two dijet mass regions. The results are compared to next-to-leading-order QCD predictions. D*+/- meson production in jets is also measured. D*+/- mesons found in jets are fully reconstructed in the decay chain: D*+ -> D0pi+, D0 -> K-pi+, and its charge conjugate.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Mot(s)-clé(s) : QCD
 in2p3-00704527, version 1 http://hal.in2p3.fr/in2p3-00704527 oai:hal.in2p3.fr:in2p3-00704527 Contributeur : Jeanine Pellet <> Soumis le : Mardi 5 Juin 2012, 16:08:56 Dernière modification le : Mercredi 6 Juin 2012, 07:33:00