Strong and weak CP in a model with a new gauged U(1) symmetry

Journal Article · Wed May 01 04:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.3034· OSTI ID:5592330

Frampton, P H; Ng, D ^[1]

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

We discuss a natural solution to the strong {ital CP} problem with spontaneous {ital CP} breaking in the context of SU{sub {ital C}}(3){times}SU{sub {ital L}}(2){times}U{sub {ital Y}}(1){times}U{sub new}(1) with two vectorlike quarks. The gauged U{sub new}(1) symmetry is imposed such that {bar {theta}} remains zero at the tree level when {ital CP} and U{sub new}(1) are broken by singlet Higgs scalars. Flavor-changing neutral currents at the tree level are naturally suppressed because only singlet Higgs scalars are introduced. In order to agree with the experimental measurement of {epsilon} and {epsilon}{prime}/{epsilon}, we find that the {ital CP}-breaking scale and the masses of the new quarks are less than 2.0 TeV and 530 GeV, respectively.

• DOE Contract Number: FG05-85ER40219
• OSTI ID: 5592330
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 43:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BASIC INTERACTIONS
COMPOSITE MODELS
CP INVARIANCE
CURRENTS
EIGENSTATES
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
GAUGE INVARIANCE
GRAND UNIFIED THEORY
HIGGS MODEL
INTERACTIONS
INVARIANCE PRINCIPLES
LIE GROUPS
MASS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
NUCLEAR POTENTIAL
PARTICLE MODELS
POSTULATED PARTICLES
POTENTIALS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
STANDARD MODEL
STRONG INTERACTIONS
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEAK INTERACTIONS
YUKAWA POTENTIAL