Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-04-04
Physics
High Energy Physics
High Energy Physics - Phenomenology
Based on a talk delivered in the honor of Professor K. Kikkawa's 60th birthday, December 1995, Osaka, Japan. Latex, 15 pages,
Scientific paper
The masses of quarks and leptons suggest a strong hierarchical structure. We argue that their patterns can be reproduced through the introduction of a new Abelian symmetry. The data suggest that this symmetry is anomalous. We suggest that the cancellation of its anomalies occur through the Green-Schwarz mechanism. An important check of this idea is that it links the Weinberg angle to a mass ratio of the elementary fermions. The Green-Schwarz mechanism occurs naturally in many superstring compactifications, and produces a small parameter, which we use to determine the quark mass hierarchy. We show that hierarchy and mixings among the chiral fermions is a consequence of the Green-Schwarz mechanism. We present several models where this idea is realized.
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