Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV

Abstract

The first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant t t-bar background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4 +- 5.4 pb, in agreement with the standard model prediction.

Replaced with published version. Added journal reference and DOI

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Implications of CTEQ global analysis for collider observables
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Single-top hadroproduction in association with a W boson
• Pileup subtraction for jet shapes
• Observation of Single Top Quark Production and Measurement of |Vtb| with CDF
• Evidence for associated production of a single top quark and W boson in pp collisions at sqrt(s) = 7 TeV
• Search for New Physics via Single Top Production at the LHC
• Observation of s-channel production of single top quarks at the Tevatron

Cited by in corpus (83)

• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• The Standard Model as an Effective Field Theory
• HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
• O new physics, where art thou? A global search in the top sector
• Constraining the top-Higgs sector of the Standard Model Effective Field Theory
• An NLO+PS generator for $t\bar{t}$ and $Wt$ production and decay including non-resonant and interference effects
• Right-handed charged currents in the era of the Large Hadron Collider
• Search for resonant t t-bar production in proton-proton collisions at sqrt(s) = 8 TeV
• Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections
• Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in llbb final states
• Search for neutral resonances decaying into a Z boson and a pair of b jets or tau leptons
• Cross section measurement of t-channel single top quark production in pp collisions at sqrt(s) = 13 TeV
• Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element ${\mathbf{V}}_{\mathbf{tb}}$
• Search for lepton flavour violating decays of the Higgs boson to e tau and e mu in proton-proton collisions at sqrt(s) = 8 TeV
• Measurement of the production cross-section of a single top quark in association with a $W$ boson at 8 TeV with the ATLAS experiment
• Measurement of the cross-section for producing a $W$ boson in association with a single top quark in $pp$ collisions at $\sqrt{s}=13$ TeV with ATLAS
• Measurement of the production cross-section of a single top quark in association with a $Z$ boson in proton--proton collisions at 13 TeV with the ATLAS detector
• Search for third-generation scalar leptoquarks decaying to a top quark and a $\tau$ lepton at $\sqrt{s}=$ 13 TeV
• Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Inclusive and differential measurements of the t t-bar charge asymmetry in pp collisions at sqrt(s) = 8 TeV
• Measurements of t t-bar spin correlations and top quark polarization using dilepton final states in pp collisions at sqrt(s) = 8 TeV
• Measurement of the production cross section for single top quarks in association with W bosons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at sqrt(s) = 8 TeV
• Measurement of the t t-bar production cross section using events in the e mu final state in pp collisions at sqrt(s) = 13 TeV
• Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at sqrt(s) = 8 TeV
• Top-quark production in proton-nucleus and nucleus-nucleus collisions at LHC energies and beyond
• Soft-gluon corrections for $tW$ production at N${}^3$LO
• Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at $\sqrt{s}=$ 13 TeV
• Automated simulations beyond the Standard Model: supersymmetry
• Search for s-channel single top-quark production in proton-proton collisions at $\sqrt{s}$=8 TeV with the ATLAS detector
• Measurement of the associated production of a single top quark and a Z boson in pp collisions at $\sqrt{s}=$ 13 TeV
• Search for a low-mass pseudoscalar Higgs boson produced in association with a b b-bar pair in pp collisions at sqrt(s) = 8 TeV
• Single top-quark production at the Tevatron and the LHC
• Measurement of the jet mass in highly boosted t t-bar events from pp collisions at sqrt(s) = 8 TeV
• Search for s channel single top quark production in pp collisions at sqrt(s) = 7 and 8 TeV
• Studying the $Wtb$ vertex structure using recent LHC results
• Measurements of t t-bar charge asymmetry using dilepton final states in pp collisions at sqrt(s) = 8 TeV
• Top-Quark Physics: Status and Prospects
• Measurement of differential cross-sections of a single top quark produced in association with a $W$ boson at $\sqrt{s}=13$ TeV with ATLAS
• Present and future constraints on top EW couplings
• Single top quark production at the LHC
• Measurement of the top quark mass using charged particles in pp collisions at sqrt(s) = 8 TeV
• Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
• Polarization of top quark as a probe of its chromomagnetic and chromoelectric couplings in $tW$ production at the Large Hadron Collider
• Probing anomalous $Wtb$ couplings at the LHC in single top quark production through $t$-channel
• Single top-quark production with SHERPA
• Search for vector-like light-flavor quark partners in proton-proton collisions at $\sqrt{s}=$8 TeV
• The Top Quark
• Top-quark physics at the Large Hadron Collider
• Measurement of single top-quark production in association with a $W$ boson in the single-lepton channel at $\sqrt{s}=8$ TeV with the ATLAS detector
• Measurement of the Single Top Quark Production Cross Section and |Vtb| in Events with One Charged Lepton, Large Missing Transverse Energy, and Jets at CDF
• Analytic two-loop master integrals for $tW$ production at hadron colliders: I
• Momentum-space threshold resummation in $tW$ production at the LHC
• Measuring $|V_{td}|$ at LHC
• Triple top quark production in Standard Model
• Limits on the anomalous $Wtq$ couplings
• Observation of tW production in the single-lepton channel in pp collisions at $\sqrt{s}$ = 13 TeV
• Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector
• Dipole-induced anomalous top quark couplings at the LHC
• One-loop squared amplitudes for hadronic $tW$ production at next-to-next-to-leading order in QCD
• Anomalous top charged-current contact interactions in single top production at the LHC
• Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
• Measurement of single top-quark production in association with a $W$ boson in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Kinematic Discrimination of tW and tt Productions Using Initial State Radiation
• Experimental Status of the CKM Matrix
• Staying on Top of SMEFT-Likelihood Analyses
• Results on TOP physics from CMS
• A Global Analysis of the Standard Model Effective Field Theory in the Production and Decay Channels of a Single Top Quark
• Constraining dimension-6 SMEFT with higher-order predictions for $pp\to tW$
• Limits on anomalous top quark gauge couplings from Tevatron and LHC data
• Probing top quark anomalous moments in $W$ boson associated single top quark production at the LHC using polarization and spin correlation
• Recent results of the CMS experiment
• Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Single top measurements and the $|V_{\mathrm{tb}}|$ extraction at the LHC
• Reduction of planar double-box diagram for single-top production via auxiliary mass flow
• Searches for new interactions within the SMEFT framework at present and future colliders
• Recent measurements of associated single top-quark production cross-section with the ATLAS detector
• Top Quark Studies at D0
• Single top-quark production via $tW$, $tZq$, and $s$-channel with ATLAS and CMS
• Experimental Summary of the Second Annual Conference on Large Hadron Collider Physics
• Recent CMS results in top and Higgs physics
• Approximate N${}^2$LO and N${}^3$LO QCD Predictions for $tW$ Production