A template method to measure the $t\bar{t}$ polarisation

Abstract

We develop a template method for the measurement of the polarisation of $t\bar{t}$ pairs produced in hadron collisions. The method would allow to extract the individual fractions of $t_L{\bar{t}}_L$, $t_R{\bar{t}}_R$, $t_L{\bar{t}}_R$ and $t_R{\bar{t}}_L$ pairs with a fit to data, where $L,R$ refer to the polarisation along any axis. These polarisation fractions have not been independently measured at present. Secondarily, the method also provides the net polarisation of $t$ and $\bar{t}$, as well as their spin correlation for arbitrary axes.

arXiv commentLaTeX 9 pages. Minor changes and some extra discussions, final version in EPJC

References in corpus (21)

• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Observation of Top Quark Production in Pbar-P Collisions
• UFO - The Universal FeynRules Output
• Observation of the Top Quark
• Parton distributions with QED corrections
• Impact of Heavy Quark Masses on Parton Distributions and LHC Phenomenology
• Performance of missing transverse momentum reconstruction with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the Top Quark Mass Using Dilepton Events
• QCD-corrected spin analysing power of jets in decays of polarized top quarks
• 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
• NNLO QCD corrections to leptonic observables in top-quark pair production and decay
• A set of top quark spin correlation and polarization observables for the LHC: Standard Model predictions and new physics contributions
• Measurements of top-quark pair spin correlations in the $e\mu$ channel at $\sqrt{s}=13$ TeV using $pp$ collisions in the ATLAS detector
• Measurements of top quark spin observables in $t\bar{t}$ events using dilepton final states in $\sqrt{s}=8$ TeV $pp$ collisions with the ATLAS detector
• Model-independent measurement of the top quark polarisation
• Quantum coherence, top transverse polarisation and the Tevatron asymmetry $A_{FB}^{\ell }$
• Dilepton azimuthal correlations in $t\bar{t}$ production

Cited by in corpus (4)

• Improved tests of entanglement and Bell inequalities with LHC tops
• Hadronic Top Quark Polarimetry with ParticleNet
• Analytical Insights on Hadronic Top Quark Polarimetry
• Asymmetries in invisible Dark Matter mediator production associated with $t\bar{t}$ final states