String-derivedD 4 flavor symmetry and phenomenological implications
Author(s) -
Pyungwon Ko,
Tatsuo Kobayashi,
Jae-hyeon Park,
Stuart Raby
Publication year - 2007
Publication title -
physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology
Language(s) - English
Resource type - Journals
eISSN - 1550-7998
pISSN - 1550-2368
DOI - 10.1103/physrevd.76.035005
Subject(s) - orbifold , physics , particle physics , symmetry (geometry) , string (physics) , flavor , symmetry breaking , theoretical physics , mathematics , geometry , medicine , pathology
In this paper we show how some flavor symmetries may be derived from theheterotic string, when compactified on a 6D orbifold. In the body of the paperwe focus on the $D_4$ family symmetry, recently obtained in $Z_3 \times Z_2$orbifold constructions. We show how this flavor symmetry constrains fermionmasses, as well as the soft SUSY breaking mass terms. Flavor symmetry breakingcan generate the hierarchy of fermion masses and at the same time the flavorsymmetry suppresses large flavor changing neutral current processes.Comment: 17 pages, no figur
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