Direct Measurement of the Top Quark Charge at Hadron Colliders

Abstract

We consider photon radiation in tbar-t events at the upgraded Fermilab Tevatron and the CERN Large Hadron Collider (LHC) as a tool to measure the electric charge of the top quark. We analyze the contributions of tbar-t-gamma production and radiative top quark decays to p-p, pbar-p -> gamma l^+/- nu bbar-b jj, assuming that both b-quarks are tagged. With 20~fb^{-1} at the Tevatron, the possibility that the ``top quark'' discovered in Run I is actually an exotic charge -4/3 quark can be ruled out at the 95% confidence level. At the LHC, it will be possible to determine the charge of the top quark with an accuracy of about 10%.

Revtex, 24 pages, 2 tables, 9 figures

Cited by in corpus (29)

• Physics of Ultra-Peripheral Nuclear Collisions
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Review of Top Quark Physics
• QCD corrections to top quark pair production in association with a photon at hadron colliders
• The "Top Priority" at the LHC
• Electromagnetic dipole moments of the top quark
• Top Quark Physics at the LHC: A Review of the First Two Years
• QCD Corrections to Static Heavy Quark Form Factors
• Improved Measurement of ttZ Couplings at the LHC
• Evidence for t\bar{t}γProduction and Measurement of σ_t\bar{t}γ/ σ_t\bar{t}
• Hard Photons in Hadroproduction of Top Quarks with Realistic Final States
• Beautiful Mirrors at the LHC
• Status and Prospects of Top-Quark Physics
• Review of Top Quark Physics Results
• Off-shell vs on-shell modelling of top quarks in photon associated production
• Preon Trinity - A Schematic Model of Leptons, Quarks and Heavy Vector Bosons
• Review of Properties of the Top Quark from Measurements at the Tevatron
• Next-to-leading order QCD corrections to $t\bar{t}\gamma$ production at the 7 TeV LHC
• Complete NLO corrections to top-quark pair production with isolated photons
• Limits on the anomalous $Wtq$ couplings
• Higher-order corrections in $t\bar{t}\gamma$ cross sections
• Searching the Inclusive Lepton + Photon + Missing ET + b-quark Signature for Radiative Top Quark Decay and Non-Standard-Model Processes
• QCD corrections to the production of $t\bar{t}\gamma$ at the ILC
• High-energy photon collisions at the LHC - dream or reality?
• Top Quark Physics at the Tevatron
• Top-philic Machine Learning
• Measurement of the inclusive ttgamma cross section at sqrt(s) = 7 TeV with the ATLAS detector
• Photon radiation effects in kinematic reconstruction of top quarks
• One-loop amplitudes for $t\bar{t}j$ and $t\bar{t}\gamma$ productions at the LHC through $\mathcal{O}({\epsilon }^2)$