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Open Access item QCD analysis of the tau hadronic width

Authors:Braaten, E.
Narison, Stéphan
Pich, Antonio
Issue Date:13-Apr-1992
Publisher:Elsevier
Citation:Nuclear Physics B 373(3): 581-612 (1992)
Abstract:The total τ hadronic width can be accurately calculated using analyticity and the operator product expansion. The theoretical analysis of this observable is updated to include all available perturbative and non-perturbative corrections. Experimental measurements of τ decay rates are used to determine with high precision the QCD running coupling constant at the scale of the τ mass. The analysis is also used to study the present discrepancy between the experimental measurements of the leptonic branching fractions of the τ and its total lifetime.
Description:32 páginas, 1 figura, 4 tablas.-- CERN-TH-6070-91 ; NUHEP-TH-91-8 ; PM-91-8.
Publisher version (URL):http://dx.doi.org/10.1016/0550-3213(92)90267-F
http://cdsweb.cern.ch/search?sysno=000138457CER
URI:http://hdl.handle.net/10261/33357
ISSN:0550-3213
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Appears in Collections:(IFIC) Artículos

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