26-30 March 2012
University of Bonn
Europe/Berlin timezone

Measurements with ATLAS detector of jets containing charm and bottom quarks

27 Mar 2012, 11:36
18m
Drawing Room, Mathematical Institute (University of Bonn)

Drawing Room, Mathematical Institute

University of Bonn

Heavy flavours Heavy flavours

Speaker

David Calvet (Univ. Blaise Pascal Clermont-Fe. II (FR))

Description

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.

Primary authors

David Calvet (Univ. Blaise Pascal Clermont-Fe. II (FR)) Prof. Mark Oreglia (University of Chicago (US))

Presentation Materials