The need for an intermediate mass scale in GUTs

Details The need for an intermediate mass scale in GUTs The need for an intermediate mass scale in GUTs

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8329151s&link_type=abstract

Presented at the Europhy. Study Conf. on Electroweak Effects at High Energies, Erice, Sicily, Feb. 1983

Mathematics

Logic

Cosmology, Gauge Theory, Particle Mass, Particle Theory, Unified Field Theory, Broken Symmetry, Fermions, Hierarchies, Instantons, Magnetic Monopoles, Quantum Chromodynamics

Scientific paper

The minimal SU(5) grand unified field theory (GUT) model fails to resolve the strong charge parity (CP) problem, suffers from the cosmological monopole problem, sheds no light on the nature of the 'dark' mass in the universe, and predicts an unacceptably low value for the baryon asymmetry. All these problems can be overcome in suitable grand unified axion models with an intermediate mass scale of about 10 to the 11th power to 10 to the 12th power GeV. An example based on the gauge group SO(10) is presented. Among other things, it predicts that the axions comprise the 'dark' mass in the universe, and that there exists a galactic monopole flux of 10 to the -8th power to 10 to the -7th power/sq cm/yr. Other topics that are briefly discussed include proton decay, family symmetry, neutrino masses and the gauge hierarchy problem.

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