Measurement of the $WW$ and $WZ$ production cross section using final states with a charged lepton and heavy-flavor jets in the full CDF Run II data set

Abstract

We present a measurement of the total {\it WW} and {\it WZ} production cross sections in $p\bar{p}$ collision at $\sqrt{s}=1.96$ TeV, in a final state consistent with leptonic $W$ boson decay and jets originating from heavy-flavor quarks from either a $W$ or a $Z$ boson decay. This analysis uses the full data set collected with the CDF II detector during Run II of the Tevatron collider, corresponding to an integrated luminosity of 9.4 fb${}^{-1}$. An analysis of the dijet mass spectrum provides $3.7\sigma$ evidence of the summed production processes of either {\it WW} or {\it WZ} bosons with a measured total cross section of ${\sigma }_{WW+WZ}=13.7\pm 3.9$~pb. Independent measurements of the {\it WW} and {\it WZ} production cross sections are allowed by the different heavy-flavor decay-patterns of the $W$ and $Z$ bosons and by the analysis of secondary-decay vertices reconstructed within heavy-flavor jets. The productions of {\it WW} and of {\it WZ} dibosons are independently seen with significances of $2.9\sigma$ and $2.1\sigma$, respectively, with total cross sections of ${\sigma }_{WW}=9.4\pm 4.2$~pb and ${\sigma }_{WZ}=3.7_{-2.2}^{+2.5}$~pb. The measurements are consistent with standard-model predictions.

19 pages, 11 figures, accepted for publication on Physical Review D

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• NNLL resummation for s-channel single top quark production
• Measuring the running top-quark mass
• Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron
• Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector
• Observation of Single Top Quark Production and Measurement of |Vtb| with CDF
• Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8 TeV
• Measurement of the sum of WW and WZ production with W+dijet events in pp collisions at sqrt(s) = 7 TeV
• Measurement of the $WW+WZ$ cross section and limits on anomalous triple gauge couplings using final states with one lepton, missing transverse momentum, and two jets with the ATLAS detector at $\sqrt{\mathrm{s}}=7$ TeV
• Track Extrapolation and Distribution for the CDF-II Trigger System
• Search for the standard model Higgs boson decaying to a bb pair in events with one charged lepton and large missing transverse energy using the full CDF data set
• Measurement of the WW+WZ Production Cross Section Using a Matrix Element Technique in Lepton + Jets Events
• Support Vector Machine Classification on a Biased Training Set: Multi-Jet Background Rejection at Hadron Colliders
• Search for the standard model Higgs boson produced in association with a $W^{\pm }$ boson with 7.5 fb${}^{-1}$ integrated luminosity at CDF
• Measurement of the production and differential cross sections of $W^{+}{W}^{-}$ bosons in association with jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• A Novel in situ Trigger Combination Method

Cited by in corpus (3)

• Measurement of $WW/WZ\to \ell \nu q{q}^{\prime }$ production with the hadronically decaying boson reconstructed as one or two jets in $pp$ collisions at $\sqrt{s}=8$ TeV with ATLAS, and constraints on anomalous gauge couplings
• Stairway to discovery: a report on the CMS programme of cross section measurements from millibarns to femtobarns
• Measurements of the electroweak diboson production cross sections in proton-proton collisions at $\sqrt{s}=$ 5.02 TeV using leptonic decays