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Search for Single Top Production at LEP via Four-Fermion Contact Interactions at $\sqrt{s}$=189-208GeV

Authors: S. Andringa, N. Castro, P. Gonçalves, O. Oliveira, A. Onofre, L. Peralta, M. Pimenta, B. Tomé, F. Veloso

Ref.: Delphi 2001-087 CONF 515 (2001)

Abstract: A search for single top production via Four-Fermion Contact Interactions is performed using data taken by the DELPHI detector at LEP-II. The data analysed were accumulated at th centre-of-mass energies ranging from 189 to 207 GeV with an integrated luminosity of 539 pb$^{-1}$. No evidence for signal was found. Preliminary limits at 95% confidence level were obtained on the characteristic energy scale, $\lambda$, for scalar, vector and tensor like couplings.