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Author Surguladze, L. R. ♦ Samuel, M. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ♦ ELECTRON-POSITRON INTERACTIONS ♦ TOTAL CROSS SECTIONS ♦ QUANTUM CHROMODYNAMICS ♦ PARTICLE PRODUCTION ♦ ANNIHILATION ♦ COUPLING CONSTANTS ♦ DISPERSIONS ♦ PERTURBATION THEORY ♦ RENORMALIZATION ♦ BASIC INTERACTIONS ♦ CROSS SECTIONS ♦ ELECTROMAGNETIC INTERACTIONS ♦ FIELD THEORIES ♦ INTERACTIONS ♦ LEPTON-LEPTON INTERACTIONS ♦ PARTICLE INTERACTIONS ♦ QUANTUM FIELD THEORY ♦ High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties ♦ High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties
Abstract The ratio {ital R}({ital S})={sigma}{sub tot}({ital e}{sup +}{ital e} {sup {minus}}{r arrow}hadrons)/{sigma}({ital e}{sup +}{ital e}{sup {minus}}{r arrow}{mu}{sup +}{mu}{sup {minus}}) is calculated to the four-loop level in perturbative QCD. The result differs from a previous calculation and is much smaller. In addition, a new result for the four-loop {beta} function in QED is obtained. This result also disagrees with a previous calculation.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1991-02-04
Publisher Place United States
Journal Physical Review Letters
Volume Number 66
Issue Number 5


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