Determination of the strong coupling constant from the charmonium spectrum

Journal Article · Mon Aug 03 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.729· OSTI ID:7261995

El-Khadra, A X; Hockney, G; Kronfeld, A S; Mackenzie, P B ^[1]

---

1. Theoretical Physics Group, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)

Lattice gauge theory techniques have recently achieved sufficient accuracy to permit a determination of the strong coupling constant from the 1{ital P}-1{ital S} splitting in the charmonium system, with all systematic errors estimated quantitatively. The present result is {alpha}{sub M{bar S}}(5 GeV)=0.174{plus minus}0.012, or equivalently, {Lambda}{sub M{bar S}}{sup (4)}=160{sub {minus}37}{sup +47} MeV ({ital M{bar S}} denotes the modified minimal subtraction scheme).

• OSTI ID: 7261995
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:5; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARMONIUM
COUPLING CONSTANTS
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
LATTICE FIELD THEORY
MESON SPECTROSCOPY
MESONS
MONTE CARLO METHOD
PARAMETRIC ANALYSIS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKONIUM
RENORMALIZATION
SPECTROSCOPY