Singe Top Production at LEP 200
K. Hagiwara, M. Tanaka, T. Stelzer
Abstract
We present exact tree level cross sections for the single top production process e- e+ → e- νe t b at LEP~200. The results reproduce roughly those obtained earlier by using the equivalent real photon approximation and we confirm the observation that detecting a top heavier than half the c.m.~energy is not feasible at LEP~200. The calculation has been performed by a new automatic Feynman amplitude generator MadGraph which produces HELAS code for the helicity amplitudes.
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