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

Abstract

The ratio of the cross section for $p\bar{p}$ interactions producing a $Z$ boson and at least one $b$ quark jet to the inclusive $Z+\mathrm{jet}$ cross section is measured using $4.2{\mathrm{fb}}^{-1}$ of $p\bar{p}$ collisions collected with the \dzero\ detector at the Fermilab Tevatron collider at $\sqrt{s}=1.96$ TeV. The $Z\to {\ell }^{+}{\ell }^{-}$ candidate events with at least one $b$ jet are discriminated from $Z+$ charm and light jet(s) events by a novel technique that exploits the properties of the tracks associated to the jet. The measured ratio is $0.0193\pm 0.0027$ for events having a jet with transverse momentum $\pt > 20 \GeV$ and pseudorapidity $|\eta |\le 2.5$, which is the most precise to date and is consistent with theoretical predictions.

Submitted to Phys. Rev. Lett

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Cited by in corpus (3)

• Measurement of the Z/gamma* + b-jet cross section in pp collisions at 7 TeV
• Measurement of the $W+b$-jet and $W+c$-jet differential production cross sections in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• High E_T Jet physics at the Tevatron