[en] Some rules which have been proposed, including 't Hooft's anomaly conditions, decoupling conditions and tumbling versus no tumbling are discussed. Then mass generation mechanisms for composite fermions are covered, including weak gauging, strong gauging, and unification. The origin of the different generations of quarks and leptons is then considered. In the context of composite models, the three generations of quarks and leptons must appear in the first approximation as three sets of massless composite fermions in identical representations of continuous flavor symmetry with a conserved generation number distinguishing them. The generation symmetry is preferably a discrete one in order to avoid massless Goldstone bosons that would occur if one could spontaneously break a continuous symmetry. Harari and Seiberg have shown that in a class of rishon models there exist U(1) generation symmetries that are automatically broken to a discrete generation symmetry due to strong interaction instantons. An example of a solution to the anomaly conditions with this property is given

[en] A stable weakly interacting massive particle can simultaneously solve both the solar neutrino and missing mass problems. We have identified this particle with a neutral lepton with mass of order 5 to 15 GeV and an anomalous magnetic moment of order 10^-2 (in the natural units). We call this new particle a [magnino]. In one scenario, the magnino is the neutral component of an electroweak doublet. It has a charged partner with mass a few GeV heavier. In this talk the experimental consequences of the magnino, its charged partner and associated Higgs are discussed. 25 refs., 9 figs

[en] In this Letter we present a 'natural' framework for obtaining bi-large neutrino mixing incorporating the Frampton-Glashow-Yanagida neutrino mass matrix ansatz. We show that an SU(2)xU(1) family symmetry can provide the desired FGY neutrino mass ansatz in a minimal supersymmetric standard model. We also show how to obtain an approximate FGY ansatz in an SO(10) SUSY GUT. In this context, the same SU(2)xU(1) family symmetry also generates the hierarchy of fermion masses as well as ameliorating SUSY flavor problems

[en] This paper discuss several particle physics candidates for the cosmic solution to the solar neutrino problem. Some of these candidates are: Cold dark matter; No conserved particle number; Conserved particle number but No cosmic asymmetry; and Conserved particle number and a cosmic asymmetry. Also outlined are their properties and methods of detecting them. 23 refs., 8 figs

[en] An introductory review of supersymmetry and supersymmetric model building is presented. The topics discussed include, a brief introduction to the formalism of supersymmetry, the gauge hierarchy problem, the minimal supersymmetric standard model and supersymmetric grand unified theories

[en] Predictions are elaborated for nucleon decay in supersymmetric grand unified theories (SUSY GUT's). A minimal SU₅ SUSY GUT is described, as well as SU₅ breaking. The low energy theory and breaking of supersymmetry are discussed. It is concluded that nucleon decay in SUSY GUT's would be dominated by p → K⁺anti nu/sub μ/ and n → K⁰anti nu/sub μ/. There are ranges in parameter space for which other decay modes may be significant or may even dominate, it is found. It is noted that minimal SUSY GUT's typically predict a value of sin²θ/sub w/ of order .233. 20 refs., 7 figs

[en] A not-so-standard model of strong and electroweak interactions is discussed. Some direct consequences of this model are discussed and finally the outlook for the future is considered

[en] The experimental evidence regarding a light Higgs boson is reviewed. It is shown that a light Higgs boson with almost any mass between 14 MeV/c² and 1 GeV/c² is still allowed by existing data. The only limit in this range comes from B decay data which, for sufficiently large values of the top quark mass, excludes a Higgs boson with a mass between 2m/sub μ/ and /approximately/700 MeV/c². Discussions of light Higgs boson emission in the decays of K, π, μ, /tau/, /eta/', and Γ are also given. 29 refs., 2 figs

[en] An action is proposed for an interacting closed bosonic string. Our formalism relies heavily on ideas discussed by Witten for the open bosonic string. The gauge fixed quantum action for the fully interacting open bosonic string is obtained

[en] We discuss several particle physics candidates for the cosmion solution to the solar neutrino problem. We outline their properties and methods of detecting them