Measurement of the $b$ Jet Cross Section in Events with a $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s}$=1.96 TeV

Abstract

A measurement of the inclusive bottom jet cross section is presented for events containing a $Z$ boson in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV using the Collider Detector at Fermilab. $Z$ bosons are identified in their electron and muon decay modes, and $b$ jets with $E_T>20$ GeV and $|\eta |<1.5$ are identified by reconstructing a secondary decay vertex. The measurement is based on an integrated luminosity of about 330 ${\mathrm{pb}}^{-1}$. A cross section times branching ratio of $\sigma (Z+b\mathrm{jets})\times \mathcal{B}(Z\to {\ell }^{+}{\ell }^{-})=0.93\pm 0.36$ pb is found, where $\mathcal{B}(Z\to {\ell }^{+}{\ell }^{-})$ is the branching ratio of the $Z$ boson or ${\gamma }^{\ast }$ into a single flavor dilepton pair ($e$ or $\mu$) in the mass range between 66 and 116 GeV$/c^2$. 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 $2.36\pm 0.92$. Here, the uncertainties are the quadratic sum of statistical and systematic uncertainties. Predictions made with NLO QCD agree, within experimental and theoretical uncertainties, with these measurements.

28 pages, 5 figures. submitted to PRD

Cited by in corpus (17)

• Accurate QCD predictions for heavy-quark jets at the Tevatron and LHC
• Measurement of the normalized Z/gamma*->mu+mu- transverse momentum distribution in p\bar{p} collisions at sqrt{s}=1.96 TeV
• Measurement of the photon$+b$-jet production differential cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96~\TeV$
• Measurement of Z/gamma*+jet+X angular distributions in ppbar collisions at sqrt{s}=1.96 TeV
• Measurement of the ratio of the $p\bar{p}\to W$+$c$-jet cross section to the inclusive $p\bar{p}\to W$+jets cross section
• A study of the associated production of photons and b-quark jets in p-pbar collisions at sqrt{s} = 1.96 TeV
• Search for single top quark production in pbar p collisions at sqrt{s}=1.96 TeV in the missing transverse energy plus jets topology
• A measurement of the ratio of inclusive cross sections $\sigma (p\bar{p}\to Z+b\mathrm{jet})/\sigma (p\bar{p}\to Z+\mathrm{jet})$ at $\sqrt{s}=1.96$ TeV
• Measurement of associated production of Z bosons with charm quark jets in ppbar collisions at sqrt(s)=1.96 TeV
• Measurement of the ratio of differential cross sections σ(ppbar -> Z + b jet)/σ(ppbar -> Z + jet) in ppbar collisions at sqrt(s)=1.96 TeV
• Measurement of the Top Quark Mass in ppbar Collisions at sqrt(s) = 1.96 TeV using the Decay Length Technique
• A Search for the Higgs Boson Produced in Association with $Z\to {\ell }^{+}{\ell }^{-}$ Using the Matrix Element Method at CDF II
• Vector Bosons and Jets in Proton Collisions
• Improved Search for a Higgs Boson Produced in Association with Z->l+l- in proton antiproton Collisions at sqrt(s) = 1.96 TeV
• Search for the Higgs boson produced with $Z\to {\ell }^{+}{\ell }^{-}$ in $p\bar{p}$ collisions at $\sqrt{s}=$ 1.96 TeV
• Measurement of the ratio of inclusive cross sections $\sigma (p\bar{p}\to Z+2b\text{jets})/\sigma (p\bar{p}\to Z+\text{2 jets})$ in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Search for the Standard Model Higgs Boson Produced in Association with a $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV