Summation of the perturbation expansion and the QCD corrections to. tau. decay

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

OSTI ID:5659966

Raczka, P A ^[1]

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1. Uniwersytet Warszawski, Wydzial Fizyki, ul. Pasteura, 7, 02-093 Warszawa, Poland (PL)

The problem of summation of the perturbation expansion in QCD is discussed. It is argued that this expansion is summable by a modified Borel method. The QCD corrections to the semileptonic width of a heavy lepton are considered as an example. The possible differences between the predictions from the resummed expansion and the truncated expansion are illustrated. It is shown that the use of a Borel-type approximant may eliminate certain discrepancy between the theoretical prediction for the {tau} lepton and experiment.

• OSTI ID: 5659966
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 43:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HEAVY LEPTONS
LEPTONS
PARTICLE DECAY
PERTURBATION THEORY
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SEMILEPTONIC DECAY
TAU PARTICLES
WEAK PARTICLE DECAY