1992/11/08 by J. Lopez, Jorge L. Lopez, D.V. Nanopoulos +3 · 6 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(93)90257-i
published as Phys.Lett.B299:262-266,1993 · 10 pages plus two figures (included as postscript files); CTP-TAMU-72/92, CERN-TH.6716/92
arxiv created 1992/11/08 · openalex publication_date 1993/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A series of predictions are worked out in order to put the minimal SU(5) supergravity model under experimental test. Using the two-loop gauge coupling renormalization group equations, with the inclusion of supersymmetric threshold corrections, we calculate a new value for the proton decay rate in this model and find that SuperKamiokande and Gran Sasso should see the proton decay mode p→νK+ for most of the allowed parameter space. A set of physically sensible assumptions and the cosmological requirement of a not too young Universe give us a rather restrictive set of allowed points in the parameter space, which characterizes this model. This set implies the existence of interesting correlations among various masses: either the lightest chargino and the next-to-lightest neutralino are below ≈100\GeV (and therefore observable at the Tevatron) or the lightest Higgs boson is below ≈50\GeV (and therefore observable at LEP I-II). These tests are crucial steps towards selecting the correct low-energy effective supergravity model. We also comment on the compatibility of the model with sin2θw(MZ) measurements as a function of α3(MZ).