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hep-ph1994
Neutrino Masses from Gauge Symmetries
H. Dreiner, G. K. Leontaris, S. Lola +2
A very simple extension of the standard model to include an Abelian family symmetry is able to describe the hierarchy of quark and lepton masses and their mixing angles together wi…
hep-th1994
Classification of (2,2) Compactifications by Free Fermions 2
S. A. Abel, C. M. A. Scheich
We present a classification of (2,2) free field compactifations with one twist in which only 95 distinct models (generations and antigenerations) are found. Models with three gener…