Abstract
We study the phenomenology of heterotic superstring models compactified on Calabi-Yau manifolds with non-abelian fundamental groups which can yield the rank-5 gauge group SU(3)c × SU(2)L × U(1)2 in four dimensions. We examine one 2-generation model and several 4-generation models. They all have fatal problems with proton decay and/or neutrino masses. The most interesting 4-generation model avoids rapid proton decay at the expense of a neutrino weighing more than the proton and an unrealistic pattern of Cabibbo mixing.
Original language | English (US) |
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Pages (from-to) | 445-469 |
Number of pages | 25 |
Journal | Nuclear Physics, Section B |
Volume | 306 |
Issue number | 3 |
DOIs | |
State | Published - Aug 29 1988 |