Three families from SU(4){sub A}{circle_times}SU(3){sub C}{circle_times}SU(2){sub L}{circle_times}U(1){sub X} SM-like chiral models

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.383· OSTI ID:471226

Kong, O C ^[1]

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1. Institute of Field Physics, Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)

We give a detailed description of the model construction procedures about our new approach to the family structure of the standard model. SM-like chiral fermion spectra, largely {open_quotes}derivable{close_quote}{close_quote} from the gauge anomaly constraints, are formulated in an SU(N){circle_times}SU(3){circle_times}SU(2){circle_times}U(1) symmetry framework as an extension of the SM symmetry. The N=4 case gives naturally three families as a result, with U(1){sub Y} nontrivially embedded into the SU(4){sub A}{circle_times}U(1){sub X}. Such a spectrum has extra vectorlike quarks and leptons. We illustrate how an acceptable symmetry-breaking pattern can be obtained through a relatively simple scalar sector which gives naturally hierarchical quark mass matrices. Compatibility with various FCNC constraints and some interesting aspects of the possible phenomenological features are discussed, from a non-model-specific perspective. The question of incorporating supersymmetry without putting in the Higgs bosons as extra supermultiplets is also addressed. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: University of North Carolina
• DOE Contract Number: FG05-85ER40219
• OSTI ID: 471226
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 55; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHIRAL SYMMETRY
FERMIONS
LEPTONS
MASS
QUARKS
SU-2 GROUPS
SU-3 GROUPS
SU-4 GROUPS
SUPERMULTIPLETS
SUPERSYMMETRY
SYMMETRY BREAKING
U-1 GROUPS
UNIFIED GAUGE MODELS