String-derived D4 flavor symmetry and phenomenological implications

Details String-derived D4 flavor symmetry and phenomenological implications String-derived D4 flavor symmetry and phenomenological implications

2007-04-21

arxiv.org/abs/0704.2807v1

Phys.Rev.D76:035005,2007; Erratum-ibid.D76:059901,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, no figure

Scientific paper

10.1103/PhysRevD.76.035005

In this paper we show how some flavor symmetries may be derived from the heterotic string, when compactified on a 6D orbifold. In the body of the paper we focus on the $D_4$ family symmetry, recently obtained in $Z_3 \times Z_2$ orbifold constructions. We show how this flavor symmetry constrains fermion masses, as well as the soft SUSY breaking mass terms. Flavor symmetry breaking can generate the hierarchy of fermion masses and at the same time the flavor symmetry suppresses large flavor changing neutral current processes.

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