Search for anomalous Wtb couplings and top FCNC in t-channel single-top-quark events
Collaboration
Citations per year
Abstract:
Single-top-quark events in the -channel are used to probe Wtb anomalous couplings and to search for top quark Flavor Changing Neutral Current (FCNC) interactions in proton-proton collisions at TeV. The analyzed data correspond to an integrated luminosity of 5~fb. Events with the top quark decaying into a muon, neutrino and b-quark are selected. A Bayesian neural network is used to discriminate between signal and backgrounds. The observed event yields are consistent with SM prediction, and exclusion limits at 95\% C.L. are determined. The exclusion limits on anomalous right vector and left tensor couplings of the Wtb vertex are found to be and . In the scenarios with FCNC tcg and tug couplings, limits on the coupling strengths are found to be which corresponds to limits on the branching ratios .Note:
- Preliminary results
- Data
- neutral current: flavor changing
- coupling: (top W bottom)
- coupling: tensor
- coupling: vector
- neural network: Bayesian
- p p: scattering
- top: branching ratio: upper limit
- background
- muon: final state
References(46)
Figures(18)
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