Single top production at LEP 200

K. Hagiwara, M. Tanaka, T. Stelzer

Research output: Contribution to journalArticlepeer-review


We present exact tree level cross sections for the single top production process e-e+ → e-vetb 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.

Original languageEnglish (US)
Pages (from-to)521-525
Number of pages5
JournalPhysics Letters B
Issue number3-4
StatePublished - Apr 21 1994
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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