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Beating the Standard Model
Sheldon L. Glashow
This report, adapted from my talk at the 1998 Ettore Majorana Subnuclear School at Erice, proffers speculative explanations of the strong CP problem and the existence of cosmic ray…
"Just So" Neutrino Oscillations Are Back
Sheldon L. Glashow, Peter J. Kernan, Lawrence M. Krauss
Recent evidence for oscillations of atmospheric neutrinos at Super-Kamiokande suggest, in the simplest see-saw interpretation, neutrino masses such that `just so' vacuum oscillatio…
Evading the GZK Cosmic-Ray Cutoff
Sidney Coleman, Sheldon L. Glashow
Explanations of the origin of ultra-high energy cosmic rays are severely constrained by the Greisen-Zatsepin-Kuz'min effect, which limits their propagation over cosmological distan…
Neutrinos on Earth and in the Heavens
Howard Georgi, S. L. Glashow
Recent data lead us to a simple and intriguing form of the neutrino mass matrix. In particular, we find solar neutrino oscillations to be nearly maximal (and rule out the small-ang…
Soft Superweak CP Violation and the Strong CP Puzzle
Howard Georgi, Sheldon L. Glashow
We discuss a class of models in which CP is violated softly in a heavy sector adjoined to the standard model. Heavy-sector loops produce the observed CP violation in kaon physics,…
Cosmological Searches for Photon Velocity Oscillations
Sheldon L. Glashow
We posit a second massless photon, uncoupled to known forms of matter but undergoing Lorentz non-invariant velocity mixing with ordinary photons. Our speculation within a speculati…