Using the computer code CompHEP we estimate the number of events and the background, at LEP II and TESLA, for the reaction e+e−→NNˉγ, where N is a hypothetical Dirac neutrino with mass of the order of 50 GeV.
@article{arxiv.hep-ph/0006324,
title = {On the search for 50 GeV neutrinos},
author = {V. A. Ilyin and M. Maltoni and V. A. Novikov and L. B. Okun and A. N. Rozanov and M. I. Vysotsky},
journal= {arXiv preprint arXiv:hep-ph/0006324},
year = {2007}
}