Anomalous gtt couplings in the Littlest Higgs Model with T-parity

Abstract

In this work we calculate the leading electroweak (EW) corrections to the anomalous $gt\bar{t}$ coupling in the Littlest Higgs model with T-parity (LHT), by applying the Goldstone boson equivalence theorem. In the LHT model, such electroweak corrections arise from the loop diagrams of heavy fermions and the ``would-be'' Goldstone bosons. We further examine the EW corrections in the top quark pair production via the quark annihilation process at the LHC. The negative EW corrections in the Standard Model are partially canceled by the positive EW corrections from the loops of the new heavy particles, and the latter dominates in the large invariant mass of the top quark pair.

arXiv commentversion appeared in PRD

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• Higgs production as a probe of anomalous top couplings
• Polarization of top quark as a probe of its chromomagnetic and chromoelectric couplings in $tW$ production at the Large Hadron Collider
• New estimate of the chromomagnetic dipole moment of quarks in the standard model
• A concise review on some Higgs-related new physics models in light of current experiments
• Chromomagnetic and chromoelectric dipole moments of the top quark in the 4GTHDM
• Study of top quark dipole interactions in $t\bar{t}$ production associated with two heavy gauge bosons at the LHC
• Limits on the anomalous $Wtq$ couplings
• Probing the Anomalous Couplings of the Top Quark with Gluon at the LHC and Tevatron
• Chromomagnetic and chromoelectric dipole moments of quarks in the reduced 331 model
• Probing dark particles indirectly at the CEPC
• One-loop effects on top pair production in the littlest Higgs model with T-parity at the LHC
• On-shell $WW\gamma$ vertex in the T-Parity and non T-Parity Littlest Higgs model
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• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• Cross Section and Forward-Backward Asymmetry of $t\bar{t}$ Production in the Model with Four Color Symmetry