Published May 1, 1993
| Version v1
Journal article
Possible problems with the determination of αs using the semileptonic τ decay data
Creators
- 1. Department of Physics, National Laboratory for High Energy Physics (KEK), 1-1 Oho, Tsukuba-shi, Ibaraki-Ken 305 (Japan)
- 2. Centre de Physique Theorique de l'Ecole Polytechnique, 91128 Palaiseau (France)
Description
It is shown that there are considerable uncertainties in the determination of the QCD running coupling constant αs, using the finite energy sum rule and the operator product expansion in the analysis of the semileptonic τ decay. The usual claim of a good agreement with the value of αs determined from the data from CERN LEP could be accidental due to the special value of the physical τ mass. A new sum rule is derived to test strong assumptions made in the analysis of τ decay
Additional details
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 47
- Journal Issue
- 9
- Journal Page Range
- p. 3999-4005.
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24051780
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- COUPLING CONSTANTS; OPERATOR PRODUCT EXPANSION; QUANTUM CHROMODYNAMICS; SEMILEPTONIC DECAY; SUM RULES; TAU PARTICLES
- Descriptors DEC
- DECAY; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; FIELD THEORIES; HEAVY LEPTONS; LEPTONS; PARTICLE DECAY; QUANTUM FIELD THEORY; SERIES EXPANSION; WEAK PARTICLE DECAY