Breaking down the entire W boson spin observables from its decay

Abstract

We discuss the eight independent spin observables for the $W$ boson in terms of its vector and tensor polarizations and identify the angular distributions and asymmetries able to separate them in collider experiments. The results are applied to the study of polarized top quark decays and diboson resonances. These novel observables are of great value for disentangling new physics mechanisms in $W$ boson production.

RevTeX 5 pages. v2: Fixed a figure and added a reference. v3: final version to appear in PRD

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Cited by in corpus (32)

• Laboratory-frame tests of quantum entanglement in $H\to WW$
• On polarization parameters of spin-$1$ particles and anomalous couplings in $e^{+}{e}^{-}\to ZZ/Z\gamma$
• Anomalous triple gauge boson couplings in $ZZ$ production at the LHC and the role of $Z$ boson polarizations
• Measurement of the inclusive and differential WZ production cross sections, polarization angles, and triple gauge couplings in pp collisions at $\sqrt{s}=$ 13 TeV
• On the choice of beam polarization in $e^{+}{e}^{-}\to ZZ/Z\gamma$ and anomalous triple gauge-boson couplings
• Probing the $Wtb$ vertex structure in $t$-channel single-top-quark production and decay in $pp$ collisions at $\sqrt{\mathrm{s}}=8$ TeV with the ATLAS detector
• The Z boson spin observables as messengers of new physics
• Triboson interpretations of the ATLAS diboson excess
• From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems
• Polarization observables in WZ production at the 13 TeV LHC: Inclusive case
• Unravelling the anomalous gauge boson couplings in $Z{W}^{\pm }$ production at the LHC and the role of spin-$1$ polarizations
• Probing the anomalous triple gauge boson couplings in $e^{+}{e}^{-}\to W^{+}{W}^{-}$ using $W$ polarizations with polarized beams
• Quantum tomography of helicity states for general scattering processes
• Global Constraints on Top Quark Anomalous Couplings
• The fully differential top decay distribution
• The Diboson Excess: Experimental Situation and Classification of Explanations; A Les Houches Pre-Proceeding
• Measurement of the polarisation of $W$ bosons produced in top-quark decays using dilepton events at $\sqrt{s}=13$ TeV with the ATLAS experiment
• W boson polarization as a measure of gauge-Higgs anomalous couplings at the LHC
• $T$-odd correlations in polarized top quark decays in the sequential decay $t(\uparrow )\to X_b+W^{+}(\to {\ell }^{+}+{\nu }_{\ell })$ and in the quasi three-body decay $t(\uparrow )\to X_b+{\ell }^{+}+{\nu }_{\ell }$
• Top Quark Anomalous Couplings at the High-Luminosity Phase of the LHC
• Polarization in (quasi-)two-body decays and new physics
• Parametrizations of the Spin Density Matrix
• SM and BSM physics in single top quark at the LHC
• Polarisation at NLO in WZ production at the LHC
• Study of anomalous gauge boson self-couplings and the role of spin-$1$ polarizations
• Bread and butter physics: NLO electroweak corrections to polarized top quark decays
• Top-Quark Decay at Next-to-Next-to-Next-to-Leading Order in QCD
• Particle Collisions & Quantum Entanglement in High-Energy Collisions
• Top quark properties measurements at the LHC
• The W and Z boson spin observables as messengers of new physics at LHC
• First order electroweak radiative corrections to the decay of the polarised $W$ boson
• Modeling of processes with anomalous interactions by means of auxiliary fields