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Author Fulcher, L. P.
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 ♦ UPSILON RESONANCES ♦ COULOMB FIELD ♦ COUPLING CONSTANTS ♦ L-S COUPLING ♦ MATRIX ELEMENTS ♦ P STATES ♦ PERTURBATION THEORY ♦ POTENTIALS ♦ QUANTUM CHROMODYNAMICS ♦ QUARK-ANTIQUARK INTERACTIONS ♦ RENORMALIZATION ♦ VACUUM POLARIZATION ♦ COUPLING ♦ ELECTRIC FIELDS ♦ ELEMENTARY PARTICLES ♦ ENERGY LEVELS ♦ FIELD THEORIES ♦ HADRONS ♦ INTERACTIONS ♦ INTERMEDIATE COUPLING ♦ MESON RESONANCES ♦ PARTICLE INTERACTIONS ♦ QUANTUM FIELD THEORY ♦ RESONANCE PARTICLES ♦ High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties
Abstract Because of recent improvements in the quality of the P-state splittings of the UPSILON system, we decided to reexamine some of the basic assumptions underlying an important recent calculation of the properties of the system by Gupta, Radford, and Repko (GRR). In particular, we want to examine the strategy chosen to determine the renormalization scale parameter. It is also of interest to know if one can develop a method for including Luescher or Luescher-type corrections to the form of the confinement potential that is consistent with some of the accomplishments of perturbation-theory potentials and the data. To this end, we have developed an abbreviated form of the GRR potential, which gives a fit to the measured energies that is somewhat better than the original GRR potential. By introducing a join radius, where the running coupling constant stops running, we are able to include a Coulomb term in the confinement potential. The amended Luescher coefficient is determined from a continuity condition at the join radius. Its value is found to be near 0.55, which is consistent with a recent calculation of Olsson and Suchyta.
Educational Use Research
Learning Resource Type Article
Publisher Date 1988-03-01
Publisher Department Department of Physics and Astronomy, Bowling Green State University, Bowling Green, Ohio 43403
Publisher Place United States
Journal Phys. Rev. D
Volume Number 37
Issue Number 5
Organization Department of Physics and Astronomy, Bowling Green State University, Bowling Green, Ohio 43403


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