From angular coefficients to quantum observables: a phenomenological appraisal in di-boson systems

Abstract

Motivated by the growing interest in accessing the spin structure of multi-boson processes and in measuring quantum entanglement at high energies, we study polarisation and spin-correlation coefficients in di-boson systems. We show that higher-order corrections of QCD and electroweak type, off-shell modelling, and realistic effects such as fiducial selections and neutrino reconstruction are unavoidable to properly determine such coefficients, and consequently to provide a sound interpretation of observables sensitive to quantum entanglement and Bell-inequality violation. Our findings are based on a detailed phenomenological analysis of boson pairs at the LHC, either in inclusive electroweak production or coming from Higgs-boson decays.

References in corpus (42)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Peres-Horodecki separability criterion for continuous variable systems
• Bell inequalities for arbitrarily high dimensional systems
• ZZ production at hadron colliders in NNLO QCD
• Electroweak radiative corrections to e+e- --> WW --> 4fermions in double-pole approximation -- the RACOONWW approach
• Automated one-loop computations in the SMEFT
• ZZ production at the LHC: fiducial cross sections and distributions in NNLO QCD
• Precise calculation of MW, sin^2 theta_MSbar, and sin^2 theta_eff
• Narrow-width approximation accuracy
• The PYTHIA Event Generator: Past, Present and Future
• Testing entanglement and Bell inequalities in $H\to ZZ$
• Next-to-leading-order electroweak corrections to $pp\to W^{+}{W}^{-}\to$ 4 leptons at the LHC
• Left-Handed W Bosons at the LHC
• Bell inequalities and quantum entanglement in weak gauge bosons production at the LHC and future colliders
• Electroweak gauge boson polarisation at the LHC
• A model independent spin analysis of fundamental particles using azimuthal asymmetries
• Automated Predictions from Polarized Matrix Elements
• Laboratory-frame tests of quantum entanglement in $H\to WW$
• Breaking down the entire W boson spin observables from its decay
• NLO QCD predictions for doubly-polarized WZ production at the LHC
• Entanglement and Bell inequalities violation in $H\to ZZ$ with anomalous coupling
• Bell-type inequalities for systems of relativistic vector bosons
• $W$ boson polarization in vector boson scattering at the LHC
• Polarized vector boson scattering in the fully leptonic WZ and ZZ channels at the LHC
• PROPHECY4F 3.0: A Monte Carlo program for Higgs-boson decays into four-fermion final states in and beyond the Standard Model
• Anomalous triple gauge boson couplings in $ZZ$ production at the LHC and the role of $Z$ boson polarizations
• Polarized electroweak bosons in ${\text{W}}^{+}{\text{W}}^{-}$ production at the LHC including NLO QCD effects
• NLO QCD+NLO EW corrections to diboson production matched to parton shower
• Different polarization definitions in same-sign $WW$ scattering at the LHC
• Breaking down the entire spectrum of spin correlations of a pair of particles involving fermions and gauge bosons
• Isolating semi-leptonic $H\to W{W}^{\ast }$ decays for Bell inequality tests
• NNLO QCD study of polarised $W^{+}{W}^{-}$ production at the LHC
• Fiducial polarization observables in hadronic WZ production: A next-to-leading order QCD+EW study
• The Z boson spin observables as messengers of new physics
• New observables for testing Bell inequalities in $W$ boson pair production
• Comparing Traditional and Deep-Learning Techniques of Kinematic Reconstruction for polarisation Discrimination in Vector Boson Scattering
• Next-to-leading-order electroweak corrections to the production of three charged leptons plus missing energy at the LHC
• 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
• NLO QCD corrections to polarised di-boson production in semi-leptonic final states
• Polarized ZZ pairs in gluon fusion and vector boson fusion at the LHC
• Electroweak corrections to the angular coefficients in finite-$p_T$ $Z$-boson production and dilepton decay

Cited by in corpus (11)

• Quantum Information meets High-Energy Physics: Input to the update of the European Strategy for Particle Physics
• Quantum properties of $H\to V{V}^{\ast }$: precise predictions in the SM and sensitivity to new physics
• Polarized-boson pairs at NLO in the SMEFT
• Higher-Order Corrections to Quantum Observables in $h\to W{W}^{\ast }$
• Quantum Entanglement is Quantum: ZZ Production at the LHC
• Qubit entanglement from forward scattering
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Quantum state tomography with muons
• Colliders are not Testing Locality via Bell's Inequality nor Providing an Unconditional Proof of Entanglement
• Parameter Inference from Final-State Entanglement in Higgs Decays
• $CP$-odd form factor in the $HWW$ vertex