Search for anomalous top quark production at the early LHC

Abstract

We present a detailed study of the anomalous top quark production with subsequent decay at the LHC induced by model-independent flavor-changing neutral-current couplings, incorporating the complete next-to-leading order QCD effects. Our results show that, taking into account the current limits from the Tevatron, the LHC with $\sqrt{s}=7$ TeV may discover the anomalous coupling at 5$\sigma$ level for a very low integrated luminosity of 61 pb${}^{-1}$. The discovery potentials for the anomalous couplings at the LHC are examined in detail. We also discuss the possibility of using the charge ratio to distinguish the $tug$ and $tcg$ couplings.

4 pages, 3 figures, version appears in Phys. Rev. Lett

References in corpus (4)

• Implications of CTEQ global analysis for collider observables
• NNLO QCD predictions for the H -> WW -> l l nu nu signal at the LHC
• Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
• Search for flavor changing neutral currents via quark-gluon couplings in single top quark production using 2.3 fb^-1 of ppbar collisions

Cited by in corpus (21)

• Observation of $J/\psi$ pair production in pp collisions at $\sqrt{s}=7TeV$
• Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at sqrt(s) = 8 TeV
• NNLO QCD Corrections to t-channel Single Top-Quark Production and Decay
• Fiducial, total and differential cross-section measurements of $t$-channel single top-quark production in $pp$ collisions at 8 TeV using data collected by the ATLAS detector
• Search for single top-quark production via flavour changing neutral currents at 8 TeV with the ATLAS detector
• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Probing top anomalous couplings at the LHC with trilepton signatures in the single top mode
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Anomalous Top Couplings at Hadron Colliders Revisited
• Single top-quark production with SHERPA
• Search for anomalous couplings via single top quark production in association with a photon at LHC
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• Stairway to discovery: a report on the CMS programme of cross section measurements from millibarns to femtobarns
• Probing anomalous $tq\gamma$ and $tqg$ couplings via single top production in association with photon at FCC-hh
• Probing the Top Quark Flavour-Changing Neutral Current at a Future Electron-Positron Collider
• Loop induced top quark FCNC through top quark and dark matter interactions
• Limits on strong FCNC top couplings at the LHC
• Differential distributions for Single Top Quark Production at the LHeC
• Probing FCNC couplings in single top quark production associated with a neutral gauge boson at future lepton colliders
• New Physics effects on hadronic decay asymmetries of the Top quark
• NNLL momentum-space threshold resummation in direct top quark production at the LHC