Spoiling of radiation zeros at the one-loop level and infrared finiteness

Journal Article · Mon Aug 01 00:00:00 EDT 1983 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.28.650· OSTI ID:5736046

Laursen, M L; Samuel, M A; Sen, A

We consider the amplitude for the radiative decay W/sup -/..-->..phi/sub 1/phi/sub 2/..gamma.. (scalar quarks) including one-loop gluon corrections. We study this process to see if the amplitude (radiation) zeros found in lowest order survive at the one-loop level. The subset of diagrams containing self-mass insertions preserves the zero. Seagull types are shown to have a violation which is similar to kappanot =1. Triangle and box diagrams spoil the zeros as they do in the case of a scalar W. However, the amplitude is completely free of any mass singularities in the classical null zone. We conjecture that this will remain true for spin-(1/2) quarks.

• Research Organization: Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
• OSTI ID: 5736046
• Journal Information: Phys. Rev. D; (United States), Vol. 28:3
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
INTERMEDIATE BOSONS
RADIATIVE DECAY
GLUONS
INFRARED DIVERGENCES
MASS FORMULAE
PARTICLE PRODUCTION
QUANTUM CHROMODYNAMICS
QUARKS
SPIN
ANGULAR MOMENTUM
BOSONS
ELEMENTARY PARTICLES
FIELD THEORIES
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties
645400 - High Energy Physics- Field Theory