Measurement of the ppbar -> W+b+X production cross section at \sqrt{s}=1.96 TeV

Abstract

We present a measurement of the cross section for $W$ boson production in association with at least one {$b$-quark} jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1\ifb recorded with the D0 detector at the Fermilab Tevatron \ppbar Collider at $\sqrt{s}=1.96$ TeV. We measure an inclusive cross section of {$\sigma (W\sim (\to \mu \nu )+b+X)=1.04\pm 0.05$(stat.) $\pm 0.12$(syst.) pb} and $\sigma (W(\to e\nu )+b+X)=1.00$ \pm 0.04 \thinspace$(stat.)$\pm 0.12 \thinspace$(syst.)pbinthephasespacedefinedby$p_T^ν> 25$GeV,$p_T^{\text{$b$-jet}}>20$GeV,$|η^{\text{$b$-jet}}|<1.1$,andamuon(electron)with$p_T^\ell>20$GeVand$|η^μ|<1.7$($|η^e|<1.1$or$1.5<|η^e|<2.5$).Thecombinedresultperleptonfamilyis$σ(W (\to \ell ν) + b + X) = 1.05\pm 0.12 \thinspace$(stat.+syst.)for$|η^\ell|<1.7$. The results are in agreement with predictions from next-to-leading order QCD calculations using \textsc{mcfm}, $σ(W+b)\cdot {\cal B}(W \to \ell ν)= 1.34 ^{+0.41}_{-0.34}\thinspace(\textrm{syst.})$, and also with predictions from the \textsc{sherpa} and \textsc{madgraph} Monte Carlo event generators.

8 pages, 4 figures

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• Measurements of the production cross-section for a $Z$ boson in association with $b$-jets in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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• Electroweak Gauge-Boson Production in Association with b Jets at Hadron Colliders
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