Reanalysis of strong CP -violating effects in chiral perturbation theory

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

DOI:https://doi.org/10.1103/PhysRevD.44.166· OSTI ID:5728476

Cheng, H ^[1]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China (CN)

Strong {ital CP}-violating effects induced by the QCD {theta} term, e.g., the {eta}{r arrow}{pi}{pi} decay, the {ital CP}-odd pion-nucleon coupling, and the electric dipole moment of the neutron are reanalyzed in chiral perturbation theory in which strong {ital CP} violation manifests itself in the meson and baryon sectors. Corrections to previous current-algebra results are calculated. We show that strong {ital CP} phenomena do respect the general constraint that, as stressed recently by Aoki and Hatsuda, they vanish in the absence of the gluonic anomaly and/or in the chiral limit. The neutron electric dipole moment induced at the tree level is reevaluated and found to be constructive in sign and comparable in magnitude with the leading nonanalytic contribution due to one-loop diagrams.

• OSTI ID: 5728476
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 44:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
CHIRAL SYMMETRY
CP INVARIANCE
CURRENT ALGEBRA
DECAY
DIPOLE MOMENTS
ELECTRIC DIPOLE MOMENTS
ELECTRIC MOMENTS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NEUTRONS
NUCLEONS
PARTICLE INTERACTIONS
PERTURBATION THEORY
PION-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SYMMETRY