Studying the $Wtb$ vertex structure using recent LHC results

Abstract

The $Wtb$ vertex structure and the search for new anomalous couplings is studied using top quark measurements obtained at the LHC, for a centre-of-mass energy of 8 TeV. By combining the latest and most precise results on the single top quark production cross section and the measurements of the $W$-boson helicity fractions ($F_0$ and $F_L$), it is possible to set new limits, at 95% CL (confidence level), on the real and imaginary components of the new couplings. The combination of the LHC observables clearly improves the limits obtained when using the individual results alone. The updated measurements of the $W$-boson helicity fractions and the $s+t$-channels electroweak single top quark production, at the Tevatron, improve the LHC limits, when a world combination of all observables (LHC+Tevatron) is performed.

5 pages, 6 figures

References in corpus (27)

• Observation of Top Quark Production in Pbar-P Collisions
• A minimal set of top anomalous couplings
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV
• A minimal set of top-Higgs anomalous couplings
• Measurement of the t-channel single top-quark production cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Single top quark production at LHC with anomalous Wtb couplings
• Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV
• Helicity fractions of W bosons from top quark decays at NNLO in QCD
• Effective four-fermion operators in top physics: a roadmap
• Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at sqrt(s) = 8 TeV
• Search for High Mass Top Quark Production in p anti-p Collisions at S**(1/2) = 1.8 TeV
• Evidence for the associated production of a W boson and a top quark in ATLAS at sqrt(s) = 7 TeV
• Probing anomalous Wtb couplings in top pair decays
• 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
• Measurement of the W boson polarization in top quark decays with the ATLAS detector
• W polarisation beyond helicity fractions in top quark decays
• General Analysis of Single Top Production and W Helicity in Top Decay
• Combination of CDF and D0 measurements of the W boson helicity in top quark decays
• Measurement of the W-boson helicity in top-quark decays from ttbar production in lepton+jets events in pp collisions at sqrt(s) = 7 TeV
• Precise determination of the Wtb couplings at LHC
• Evidence for s-channel single top quark production in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV
• Top effective operators at the ILC
• Constraints on the Wtb vertex from early LHC data
• Complete Calculations of Wb\bar b and Wb\bar b + jet Production at Tevatron and LHC: Probing Anomalous Wtb Couplings in Single Top Production
• Probing of $Wtb$ Anomalous Couplings via the $tW$ Channel of Single Top Production

Cited by in corpus (26)

• The Standard Model as an Effective Field Theory
• Matching of gauge invariant dimension 6 operators for $b\to s$ and $b\to c$ transitions
• Constraining top quark effective theory in the LHC Run II era
• A global fit of top quark effective theory to data
• Strong tW Scattering at the LHC
• Pinning down electroweak dipole operators of the top quark
• Higgs Physics: It ain't over till it's over
• EFTfitter---A tool for interpreting measurements in the context of effective field theories
• Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at sqrt(s) = 8 TeV
• Measuring anomalous WW$\gamma$ and t$\bar{\text{t}}\gamma$ couplings using top+$\gamma$ production at the LHC
• New limits on anomalous contributions to the $Wtb$ vertex
• Determining $V_{tb}$ at Electron-Positron Colliders
• Full analysis of general non-standard tbW couplings
• Effective Field Theory in the top sector: do multijets help?
• Modeling of anomalous Wtb interactions using subsidiary fields
• Global Constraints on Top Quark Anomalous Couplings
• Study of top quark dipole interactions in $t\bar{t}$ production associated with two heavy gauge bosons at the LHC
• Transverse Momentum Resummation for $s$-channel single top quark production at the LHC
• Limits on the anomalous $Wtq$ couplings
• The top quark right coupling in the tbW-vertex
• The right top coupling in the aligned two-Higgs-doublet model
• Top Quark Anomalous Couplings at the High-Luminosity Phase of the LHC
• Top quark physics in the Large Hadron Collider era
• The anomalous $Wtb$ vertex and top-pair production at the LHC
• Constraints on $Wtb$ anomalous coupling with $B\to X_s\gamma$ and $B_{s}\toμ^{+}μ^{-}
• Detecting quark anomalous electroweak couplings at the LHC