Grand unified string theories with SU(3) gauge family symmetry

A. A. Maslikov, S. M. Sergeev, G. G. Volkov

Research output: Contribution to journalArticle

11 Citations (Scopus)


In the framework of four dimensional heterotic superstring with free fermions we investigate the rank eight Grand Unified String Theories (GUST) which contain the SU(3)H-gauge family symmetry. We explicitly construct GUSTs with gauge symmetry G = SU(5) × U(1) × (SU(3) × U(1))H ⊂ SO(16) ⊂ E(8) in free complex fermion formulation. We solve the problem of the GUST symmetry breaking taking for the observable gauge symmetry the diagonal subgroup Gsym of rank 16 group G × G ⊂ SO(16) × SO(16) ⊂ E(8) × E(8). In this approach the observed electromagnetic charge Qem can be viewed as a sum of two Q1- and Q2-charges of each G-group. In this case the model spectrum does not contain particles with exotic fractional charges.

Original languageEnglish
Pages (from-to)319-328
Number of pages10
JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 2 Jun 1994
Externally publishedYes

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