String-derived D4 flavor symmetry and phenomenological implications
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Publisher:American Physical Society
Citation:Pyungwon Ko et al, "String-derived D4 flavor symmetry and phenomenological implications," Physical Review D 76, no. 3 (2007), doi: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 × 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.
Rights:©2007 The American Physical Society
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