Measurement of the b jet cross section in events with a Z boson in pp¯ collisions at s=1.96TeV

A. Abulencia et al. (CDF Collaboration)
Phys. Rev. D 74, 032008 – Published 23 August 2006

Abstract

A measurement of the inclusive bottom jet cross section is presented for events containing a Z boson in pp¯ collisions at s=1.96TeV using the Collider Detector at Fermilab. Z bosons are identified in their electron and muon decay modes, and b jets with ET>20GeV and |η|<1.5 are identified by reconstructing a secondary decay vertex. The measurement is based on an integrated luminosity of about 330pb1. A cross section times branching ratio of σ(Z+bjets)×B(Z+)=0.93±0.36pb is found, where B(Z+) is the branching ratio of the Z boson or γ* into a single flavor dilepton pair (e or μ) in the mass range between 66 and 116GeV/c2. The ratio of b jets to the total number of jets of any flavor in the Z sample, within the same kinematic range as the b jets, is 2.36±0.92%. Here, the uncertainties are the quadratic sum of statistical and systematic uncertainties. Predictions made with next-to-leading order QCD agree, within experimental and theoretical uncertainties, with these measurements.

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  • Received 22 May 2006

DOI:https://doi.org/10.1103/PhysRevD.74.032008

©2006 American Physical Society

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Vol. 74, Iss. 3 — 1 August 2006

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