Search for single top production via FCNC at LEP at sqrt(s) = 189-208 GeV
The DELPHI Collaboration: J. Abdallah, et al
TL;DR
This paper reports a search for single top quark production via FCNC processes at LEP2 energies, setting limits on anomalous couplings with no observed signal.
Contribution
It provides the first experimental limits on FCNC single top production at LEP energies, using data from 189 to 208 GeV.
Findings
No evidence of FCNC single top production was observed.
Limits were set on the anomalous couplings kappa_gamma and kappa_Z.
The results constrain new physics models predicting FCNC processes.
Abstract
A search for single top production (e+e- -> t cbar) via Flavour Changing Neutral Currents (FCNC) was performed using the data taken by the DELPHI detector at LEP2. The data analysed have been accumulated at centre-of-mass energies ranging from 189 to 208 GeV. Limits at 95% confidence level were obtained on the anomalous coupling parameters kappa_gamma and kappa_Z.
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