Yukawa textures in string unified models with SU(4){circle_times}O(4) symmetry

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.2632· OSTI ID:538698

Allanach, B C ^[1]; King, S F ^[2]; Leontaris, G K ^[3]; Lola, S ^[4]

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1. Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom)
2. Department of Physics and Astronomy, University of Southampton, Southampton, SO9 5NH (United Kingdom)
3. Physics Department, University of Ioannina, P.O. Box 1186, GR-45110 Ioannina (Greece)
4. Theory Division, CERN, 1211 Geneva 23 (Switzerland)

We discuss the origin of Yukawa textures in the string-inspired and string-derived models based on the gauge group SU(4){circle_times}SU(2){sub L}{circle_times}SU(2){sub R} supplemented by a U(1){sub X} gauged family symmetry. The gauge symmetries are broken down to those of the minimal supersymmetric standard model which is the effective theory below 10{sup 16} GeV. The combination of the U(1){sub X} family symmetry and the Pati-Salam gauge group leads to a successful and predictive set of Yukawa textures involving two kinds of texture zeros: {ital horizontal} and {ital vertical} texture zeros. We discuss both symmetric and nonsymmetric textures in models of this kind, and in the second case perform a detailed numerical fit to the charged fermion mass and mixing data. Two of the Yukawa textures allow a low energy fit to the data with a total {chi}{sup 2} of 0.39 and 1.02, respectively, for three degrees of freedom. We also make a first attempt at deriving the nonrenormalizable operators required for the Yukawa textures from string theory. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 538698
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARGED PARTICLES
FERMIONS
GAUGE INVARIANCE
MIXING
NUMERICAL ANALYSIS
O GROUPS
RENORMALIZATION
STANDARD MODEL
STRING MODELS
SU-2 GROUPS
SU-4 GROUPS
SUPERSYMMETRY
SYMMETRY BREAKING
TEXTURE
U-1 GROUPS
YUKAWA POTENTIAL