# Search for Heavy Isosinglet Neutrinos in $e^+ e^-$ Annihilation at 130 $< \sqrt{s} <$ 189 GeV

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
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 $< \sqrt{s} <$ 189 GeV with the L3 detector at LEP. Such heavy neutrinos are expected in many extensions of the Standard Model. The search is performed for the first generation heavy singlet neutrino, $\mathrm{N}_e$, through the decay mode $\mathrm{N}_e \rightarrow \mathrm{e} + \mathrm{W}$. 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023107
Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Monday, October 4, 1999 - 9:02:04 AM
Last modification on : Friday, September 10, 2021 - 1:50:13 PM

### Citation

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Search for Heavy Isosinglet Neutrinos in $e^+ e^-$ Annihilation at 130 $< \sqrt{s} <$ 189 GeV. Physics Letters B, Elsevier, 1999, 461, pp.397-404. ⟨10.1016/S0370-2693(99)00852-7⟩. ⟨in2p3-00023107⟩