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Elsevier, Physics Letters B, 4(461), p. 397-404, 1999

DOI: 10.1016/s0370-2693(99)00852-7

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Search for heavy isosinglet neutrinos in e+e− annihilation at GeV

Journal article published in 1999 by M. Acciarri, P. Achard, O. Adriani, M. Aguilar Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Preprint: archiving allowed
Green circle
Postprint: archiving allowed
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Published version: archiving allowed
Data provided by SHERPA/RoMEO

Abstract

A search for heavy neutrinos that are isosinglets under the standard SU(2)(L) gauge group is made at center-of-mass energies 130 < root s < 189 GeV with the L3 detector at LEP. Such heavy neutrinos are expected in many extensions of the Standard Model. The starch is performed for the first generation heavy singlet neutrino, N-e, through the decay mode N-e --> e + W, We set upper limits on the mixing parameter between the heavy and light neutrino for the heavy neutrino mass range from 80 GeV to 185 GeV.