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Title: Measurement of cross sections for b jet production in events with a Z boson in p(p)over-bar collisions at root s=1.96 TeV
Authors: CDF Collaboration, Cabrera, Susana, Cuenca Almenar, Cristóbal, Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Rodrigo, Teresa, Ruiz, Alberto, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Aaltonen, T.
Issue Date: 24-Mar-2009
Publisher: American Physical Society
Abstract: A measurement of the b jet production cross section is presented for events containing a Z boson produced in p (p) over bar collisions at root s = 1.96 TeV, using data corresponding to an integrated luminosity of 2 fb(-1) collected by the CDF II detector at the Tevatron. Z bosons are selected in the electron and muon decay modes. Jets are considered with transverse energy E-T > 20 GeV and pseudorapidity vertical bar eta vertical bar < 1.5 and are identified as b jets using a secondary vertex algorithm. The ratio of the integrated Z + b jet cross section to the inclusive Z production cross section is measured to be 3.32 +/- 0.53(stat) +/- 0.42(syst) x 10(-3). This ratio is also measured differentially in jet E-T, jet eta, Z-boson transverse momentum, number of jets, and number of b jets. The predictions from leading-order Monte Carlo generators and next-to-leading-order QCD calculations are found to be consistent with the measurements within experimental and theoretical uncertainties.
Publisher version (URL): 10.1103/PhysRevD.79.052008
ISSN: 1550-7998
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Citation: Physical Review - Section D - Particles and Fields 79 (5): 052008 (2009)
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