Observation of the Production of a W Boson in Association with a Single Charm Quark

Abstract

The first observation of the production of a $W$ boson with a single charm quark ($c$) jet in $p\bar{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$ is reported. The analysis uses data corresponding to 4.3 fb${}^{-1}$, recorded with the CDF II detector at the Fermilab Tevatron. Charm quark candidates are selected through the identification of an electron or muon from charm-hadron semileptonic decay within a hadronic jet, and a $Wc$ signal is observed with a significance of 5.7 standard deviations. The production cross section ${\sigma }_{Wc}(p_{Tc}>20\mathrm{GeV}/c,|{\eta }_c|<1.5)\times B(W\to \ell \nu )$ is measured to be $13.6_{-3.1}^{+3.4}\mathrm{pb}$ and is in agreement with theoretical expectations. From this result the magnitude of the quark-mixing matrix element $V_{cs}$ is derived, $|V_{cs}|=1.08\pm 0.16$ along with a lower limit of $|V_{cs}|>0.71$ at the 95% confidence level, assuming that the $Wc$ production through $c$ to $s$ quark coupling is dominant.

arXiv comment7 pages, 1 figure

References in corpus (22)

• Parton distributions for the LHC
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Asymptotic formulae for likelihood-based tests of new physics
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• High-Energy-Physics Event Generation with PYTHIA 6.1
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• An update on vector boson pair production at hadron colliders
• MadEvent: Automatic Event Generation with MadGraph
• Determination of the Jet Energy Scale at the Collider Detector at Fermilab
• Precise Measurement of Dimuon Production Cross-Sections in muon neutrino Fe and muon antineutrino Fe Deep Inelastic Scattering at the Tevatron
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt{s}=1.96 TeV using Lepton + Jets Events with Secondary Vertex b-tagging
• Top Quark Mass Measurement Using the Template Method in the Lepton + Jets Channel at CDF II
• First Measurements of Inclusive W and Z Cross Sections from Run II of the Tevatron Collider
• Measurement of Inclusive Jet Cross Sections in Z/g* (-> ee)+jets Production in ppbar Collisions at sqrt(s)=1.96 TeV
• The Strange Parton Distribution of the Nucleon: Global Analysis and Applications
• Parton Distributions and the LHC: W and Z Production
• QCD Corrections to W Boson plus Heavy Quark Production at the Tevatron
• The Charm Content of W+1 Jet Events as a Probe of the Strange Quark Distribution Function
• First Measurement of the Production of a W Boson in Association with a Single Charm Quark in Proton Anti-proton Collisions at sqrt(s)=1.96 TeV
• Measurement of the $\ttbar$ Production Cross Section in 2 fb${}^{-1}$ of $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV Using Lepton Plus Jets Events with Soft Muon b-Tagging
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s)=1.96 TeV using Soft Electron b-Tagging

Cited by in corpus (20)

• Performance of $b$-Jet Identification in the ATLAS Experiment
• Measurement of the production of a W boson in association with a charm quark in pp collisions at sqrt(s)=7 TeV with the ATLAS detector
• Measurement of associated W + charm production in pp collisions at sqrt(s) = 7 TeV
• Measurement of associated production of a W boson and a charm quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Study of $W$ boson production in association with beauty and charm
• Measurements of the W boson rapidity, helicity, double-differential cross sections, and charge asymmetry in pp collisions at $\sqrt{s}=$ 13 TeV
• Search for $s$-channel Single Top Quark Production in the Missing Energy Plus Jets Sample using the Full CDF II Data Set
• W+charm production with massive c quarks in PowHel
• 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
• Vector Bosons and Jets in Proton Collisions
• Search for Resonances Decaying to Top and Bottom Quarks with the CDF Experiment
• Review of single vector boson production in pp collisions at $\sqrt{s}=7$ TeV
• Measuring c-quark polarization in W+c samples at ATLAS and CMS
• Observation of pseudoscalar and tensor resonances in $J/\psi \to \gamma \varphi \varphi$
• Updated Measurement of the Single Top Quark Production Cross Section and $Vtb$ in the Missing Transverse Energy Plus Jets Topology in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
• Review of physics results from the Tevatron: QCD physics
• Measurement of the production of a $W$ boson in association with a charmed hadron in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$ with the ATLAS detector
• Measurement of vector boson plus $D^{\ast }(2010{)}^{+}$ meson production in $\bar{p}p$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$
• Charm production in association with W and Z at the LHC
• Probing the strange content of the proton with charm production in charged current at LHeC