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Open Access item 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
Citation:Physical Review - Section D - Particles and Fields 79 (5): 052008 (2009)
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):http://dx.doi.org/ 10.1103/PhysRevD.79.052008
Appears in Collections:(IFIC) Artículos

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