CP-violation and instantons

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5907666

Han, C G

Effects of Yang-Mills instantons on CP-violating strong interactions are studied. Using simplified models of CP-noninvariant weak interactions, we calculate the induced strong CP-violation. Even in the simple examples studied, the CP-violating phase of a vacuum-to-vacuum transition amplitude differs in general from the phase of the determinant of the quark mass matrix multiplied by the topological charge of the background Yang-Mills field. Then several CP-violating phenomena such as eta ..-->.. 2..pi.. decay and neutron electric dipole moment induced by instantons are studied. The result of our explicit calculation of eta ..-->.. 2..pi.. decay strength verifies the current algebraic method used by Crewther et al. We also present a calculation of the instanton contribution, in the dilute gas approximation for instanton gas, to the electric dipole moment of a free quark without using 't Hooft's effective Lagrangian.

• Research Organization: Columbia Univ., New York (USA)
• OSTI ID: 5907666
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BASIC INTERACTIONS
BOSONS
CP INVARIANCE
DECAY
DIPOLE MOMENTS
ELECTRIC DIPOLE MOMENTS
ELECTRIC MOMENTS
ELEMENTARY PARTICLES
ETA MESONS
HADRONIC PARTICLE DECAY
HADRONS
INSTANTONS
INTERACTIONS
INVARIANCE PRINCIPLES
MESONS
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKS
QUASI PARTICLES
STRONG INTERACTIONS
TRANSITION AMPLITUDES
YANG-MILLS THEORY