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

Journal article

A measurement of the inclusive bottom jet cross section is presented for events containing a Z boson in pp̄ 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 330pb-1. A cross section times branching ratio of σ(Z+bjets)×B(Z→ℓ+ℓ-)=0.93±0.36pb is found, where B(Z→ℓ+ℓ-) 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. © 2006 The American Physical Society.

Authors: Abulencia, A; Acosta, D; Adelman, J; Affolder, T; Akimoto, T

• Journal: Physical Review D
• Volume: 74
• Issue: 3
• Publication date: 2006-01-01
• DOI: 10.1103/PhysRevD.74.032008
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English