A set of top quark spin correlation and polarization observables for the LHC: Standard Model predictions and new physics contributions

Abstract

We consider top-antitop quark ($t\bar{t}$) production at the Large Hadron Collider (LHC) with subsequent decay into dileptonic and lepton plus jets final states. We present a set of leptonic angular correlations and distributions with which experiments can probe all the independent coefficient functions of the top-spin dependent parts of the $t\bar{t}$ production spin density matrices. We compute these angular correlations and distributions for LHC center-of-mass energies 8, 13, and 14 TeV within the Standard Model at next-to-leading order in the QCD coupling including the mixed QCD-weak corrections and for the transverse top-quark polarization and the $t\bar{t}$ charge asymmetry also the mixed QCD-QED corrections. In addition we analyze and compute the effects of new interactions on these observables in terms of a gauge-invariant effective Lagrangian which contains all operators relevant for hadronic $t\bar{t}$ production up to mass dimension six.

Latex, 35 pages, sevaral comments and 2 tables added, version to be published in JHEP

References in corpus (16)

• A minimal set of top-Higgs anomalous couplings
• Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation
• Electroweak effects in top-quark pair production at Hadron Colliders
• Effective four-fermion operators in top physics: a roadmap
• Top Compositeness at the Tevatron and LHC
• Probing the Tevatron t tbar asymmetry at LHC
• Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at $\sqrt{s}=8$ TeV Using the ATLAS Detector
• Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization
• Anomalous Top-Higgs Couplings and Top Polarisation in Single Top and Higgs Associated Production at the LHC
• Asymmetries in top quark pair production at hadron colliders
• Measurements of spin correlation in top-antitop quark events from proton-proton collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
• Measurement of ttbar Spin Correlation in ppbar Collisions Using the CDF II Detector at the Tevatron
• Polarization of top quark as a probe of its chromomagnetic and chromoelectric couplings in $tW$ production at the Large Hadron Collider
• Anomalous chromomagnetic moment of quarks
• Renormalization group-induced phenomena of top pairs from four-quark effective operators
• Final charged-lepton angular distribution and possible anomalous top-quark couplings in p p -> t tbar X -> l^+ X'

Cited by in corpus (48)

• Constraining the top-Higgs sector of the Standard Model Effective Field Theory
• Entanglement and quantum tomography with top quarks at the LHC
• Testing Bell inequalities at the LHC with top-quark pairs
• Quantum information with top quarks in QCD
• Testing Bell inequalities in Higgs boson decays
• Quantum discord and steering in top quarks at the LHC
• Is there room for CP violation in the top-Higgs sector?
• Measurement of the top quark polarization and $\mathrm{t}\bar{\mathrm{t}}$ spin correlations using dilepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Testing entanglement and Bell inequalities in $H\to ZZ$
• Observation of quantum entanglement in top quark pair production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Higher order corrections to spin correlations in top quark pair production at the LHC
• Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions
• Quantum SMEFT tomography: top quark pair production at the LHC
• Spin correlations in final-state parton showers and jet observables
• Measurements of polarization and spin correlation and observation of entanglement in top quark pairs using lepton+jets events from proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measuring anomalous WW$\gamma$ and t$\bar{\text{t}}\gamma$ couplings using top+$\gamma$ production at the LHC
• Observation of a pseudoscalar excess at the top quark pair production threshold
• Top-Quark Physics: Status and Prospects
• Approaching robust EFT limits for CP-violation in the Higgs sector
• Indirect Signs of the Peccei-Quinn Mechanism
• T-odd correlations from top-quark CEDM in lepton plus jets top-pair events
• Quantum tomography of helicity states for general scattering processes
• Polarization of top produced in particle decays in an arbitrary frame
• Top and bottom tensor couplings from a color octet scalar
• Production of heavy Higgs bosons and decay into top quarks at the LHC. II: Top-quark polarization and spin correlation effects
• Search for heavy pseudoscalar and scalar bosons decaying to a top quark pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Dilepton azimuthal correlations in $t\bar{t}$ production
• Interference Resurrection of the $\tau$ Dipole through Quantum Tomography
• A template method to measure the $t\bar{t}$ polarisation
• Entropic uncertainty relations and quantum Fisher information of top quarks in a large hadron collider
• Climbing to the Top of the ATLAS 13 TeV data
• Angular analysis of bottom-flavored hadron production in semileptonic decays of polarized top quarks
• Refinable modeling for unbinned SMEFT analyses
• Asymmetry Observables for Measuring Spin Correlations in Top-Quark Pair Production
• Analytical $O({\alpha }_s)$ corrections to the beam frame double-spin density matrix elements of $e^{+}{e}^{-}\to t\bar{t}$
• Equivariant neural networks for robust $\text{CP}$ observables
• Probing top-quark electroweak couplings indirectly at the Electron-Ion Collider
• Ultimate Quantum Precision Limit at Colliders: Conditions and Case Studies
• Particle Collisions & Quantum Entanglement in High-Energy Collisions
• Characterization of the quantum state of top quark pairs produced in proton-proton collisions at $\sqrt{s}$ = 13 TeV using the beam and helicity bases
• Measurement of spin correlation and entanglement in ATLAS and CMS
• Experimental characterization of the hierarchy of quantum correlations in top quark pairs
• Probing the spin correlations of $t\bar{t}$ production at NLO QCD+EW
• Search for heavy scalar or pseudoscalar states in $\mathrm{t}\bar{\mathrm{t}}$ events at CMS
• Study $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ process including ${\tau }^{+}{\tau }^{-}$ spin information in Pb-Pb ultraperipheral collision and at Lepton collider
• Single-spin measurements and heavy new physics in the $e^{+}{e}^{-}\to t\bar{t}$ process at an FCC-ee
• Observing $t\bar{t}Z$ spin correlations at the LHC
• Top quark spin and quantum entanglement in the ATLAS experiment