1993/07/19 by J. Bernabeu, J. Bernabéu, J. Korner +5 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevlett.71.2695
published as Phys.Rev.Lett. 71 (1993) 2695-2698 · MZ-TH/93-04 #, LaTeX, 14 p. (2 Figs)
arxiv created 1993/07/19 · openalex publication_date 1993/10/25 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We analyze the possibility of universality violation in diagonal leptonic decays of the Z boson, in the context of interfamily ``seesaw'' models. In a minimal extension of the standard model with right-handed neutrino fields, we find that universality-breaking effects increase quadratically with the heavy Majorana neutrino mass and may be observed in the current experiments at the CERN e+e^\mathrm\ensuremath- collider LEP.