منابع مشابه
Unitarity and anomalous top-quark Yukawa couplings.
Unitarity constraints on anomalous top-Higgs couplings are examined. In the calculation, we considered all tt and two-boson channels and obtained the maximal value of the coupled channel amplitude, which sets the unitarity condition. We compare the unitarity constraints with the constraints from electroweak baryogenesis and electric dipole moments derived earlier. Tighter constraints can be obt...
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We show how to determine the electric and weak dipole moments of the top quark simultaneously and independently from ee → tt̄ at √ s = 500 GeV NLC. To obtain the best accuracies with which the dipole moments can be measured, we apply the optimal observables to extract the CP violating effects and consider only purely hadronic, hadronic-leptonic final state events. Results with leftand righthande...
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The top flavour-changing neutral couplings can be large in extended models with vector-like quarks. In the next decade(s) the CERN Large Hadron Collider will allow to measure (bound) them with a precision of few per cent.
متن کاملProbing Top-Quark Couplings at Polarized NLC
The energy spectrum of the lepton(s) in e+e−→ tt̄ → `± · · · /`+`− · · · at next linear colliders (NLC) is studied for arbitrary longitudinal beam polarizations as a test of possible new physics in top-quark couplings. The most general non-standard form factors are assumed for γtt̄, Ztt̄ and Wtb vertices to analyze new-physics effects in a model-independent way. Expected precision in determining t...
متن کاملAnomalous top-Higgs couplings and top polarisation in single top and Higgs associated production at the LHC
In this paper, we put constraints on anomalous CP-violating top-Higgs couplings using the currently available Higgs data and explore the prospect of measuring these couplings at 240GeV TLEP. We find that the CP-violating phase ξ is currently limited in the range |ξ| < 0.6π at 95% C.L. and may be further constrained to |ξ| < 0.07π at TLEP. Under this consideration, we further investigate the obs...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2013
ISSN: 1742-6596
DOI: 10.1088/1742-6596/452/1/012037