The Paths of Unification In The GUST With The G x G Gauge Groups of E(8) x E(8)

@inproceedings{Maslikov1996ThePO,
  title={The Paths of Unification In The GUST With The G x G Gauge Groups of E(8) x E(8)},
  author={A. A. Maslikov and I. Ya. Naumov and Giovanna Padova and Dipartimento di Fisica Infn Sezione di Pisa Universita di Padova and Institute for High Energy Physics and Protvino Russia},
  year={1996}
}
In the framework of the four dimensional heterotic superstring with free fermions we discuss the rank eight and/or sixteen Grand Unified String Theories (GUST) which contain the SU(3)H-gauge family symmetry. We explicitly investigate the paths of the unification in the GUST with gauge symmetry G × G = [SU(5) × U(1) × (SU(3) × U(1))H ] . We show that the GUSTs with the G × G gauge group allow to make the scale of unification to be consistent with the string scale MSU ∼ gstring · 5 · 10GeV . 

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