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Yukawa couplings and phenomenology of a three-generation superstring model

Journal Article · · Phys. Rev. D; (United States)
;
Armed with the explicitly calculated Yukawa couplings and knowledge of discrete symmetries we discuss the phenomenology of the three-generation superstring model suggested by Yau. We consider the possibility of CP violation induced through the complex moduli of the Calabi-Yau space (i.e., through the complex parameters in the equations that define the manifold). On analyzing the dimension-four terms in the superpotential in search of F-flat directions, we find that F-flat directions generally lead to extra massless quarks and mirror quarks as well as extra massless leptons and mirror leptons in the low-energy spectrum. We then consider a non-F-flat scenario that has only three quark and lepton generations at low energies. We also analyze other aspects of the model such as constraints of sin/sup 2/theta/sub w/ on the intermediate scale and the neutrino masses and we argue that neutron-antineutron oscillation may be observable in this class of models.
Research Organization:
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455
OSTI ID:
5711708
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 36:11; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON NUMBER
COMPOSITE MODELS
CP INVARIANCE
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
INVARIANCE PRINCIPLES
LEPTONS
LIE GROUPS
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
NEUTRON OSCILLATION
NUCLEAR POTENTIAL
PARTICLE MODELS
POSTULATED PARTICLES
POTENTIALS
QUARK MODEL
QUARKS
STRING MODELS
SU GROUPS
SU-3 GROUPS
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
YUKAWA POTENTIAL