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Measurements with ATLAS detector of jets containing charm and bottom quarks

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. 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.
keyword : QCD
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Conference papers
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http://hal.in2p3.fr/in2p3-00704527
Contributor : Jeanine Pellet <>
Submitted on : Tuesday, June 5, 2012 - 4:08:56 PM
Last modification on : Thursday, January 11, 2018 - 6:13:38 AM

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  • HAL Id : in2p3-00704527, version 1

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D. Calvet. Measurements with ATLAS detector of jets containing charm and bottom quarks. XX International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2012, Mar 2012, Bonn, Germany. ⟨in2p3-00704527⟩

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