Published December 2009 | Version v1
Journal article Metadata-only

αs Determination from τ Decays: Theoretical Status

Creators

  • 1. Departament de Fisica Teorica, IFIC, Universitat de Valencia - CSIC, Apt. Correus 22085, 46071 Valencia (Spain)

Description

The total τ hadronic width can be accurately calculated using analyticity and the operator product expansion. The result turns out to be very sensitive to the value of αs(m2τ), providing a precise determination of the strong coupling constant. The theoretical description of this observable is updated, including the recently computed O(α4s ) contributions. The experimental determination of αs(m2τ) and its actual uncertainties are discussed. (author)

Availability note (English)

Also available at http://th-www.if.uj.edu.pl/acta/sup3/t1.htm

Additional details

Additional titles

Augmented title (English)
PACS numbers: 12.38.-t, 12.38.Bx, 12.38.Qk

Identifiers

URL
http://th-www.if.uj.edu.pl/acta/sup3/t1.htm;

Publishing Information

Journal Title
Acta Physica Polonica. Series B, Proceedings Supplement
Journal Volume
3
Journal Issue
1
Journal Page Range
p. 165-170
ISSN
1899-2358

Conference

Title
FLAVIAnet Topical Workshop on Low energy constraints on extensions of the Standard Model
Dates
23-27 Jul 2009
Place
Kazimierz (Poland)

INIS

Country of Publication
Poland
Country of Input or Organization
Poland
INIS RN
41048726
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COUPLING CONSTANTS; PARTICLE WIDTHS; QUANTUM CHROMODYNAMICS; STRONG INTERACTIONS; TAU PARTICLES
Descriptors DEC
BASIC INTERACTIONS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HEAVY LEPTONS; INTERACTIONS; LEPTONS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY

Optional Information

Contract/Grant/Project number
EU Contract MRTN-CT-2006-035482; MICINN Grants FPA2007-60323; Consolider-Ingenio 2010 CSD2007-00042-CPAN; Generalitat Valenciana Grant Prometeo/2008/069; Grant ACOMP/2009/312
Notes
31 refs., 2 tabs.