HADRONIC CONTRIBUTIONS TO THE RUNNING FINE-STRUCTURE CONSTANT ALPHA(M(Z)(2)) FROM QCD SUM-RULES

Authors
NASRALLAH NF
Citation
Nf. Nasrallah, HADRONIC CONTRIBUTIONS TO THE RUNNING FINE-STRUCTURE CONSTANT ALPHA(M(Z)(2)) FROM QCD SUM-RULES, Physics letters. Section B, 393(3-4), 1997, pp. 419-422
Citations number
11
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
393
Issue
3-4
Year of publication
1997
Pages
419 - 422
Database
ISI
SICI code
0370-2693(1997)393:3-4<419:HCTTRF>2.0.ZU;2-Z
Abstract
The value of the QED running coupling constant alpha(m(z)(2)) is very important for precision tests of the standard model. A purely theoreti cal calculation of the hadronic part Delta alpha(h)(m(z)(2)) using QCD and the analytic properties of the vacuum polarisation tensor is pres ented. We obtain Delta alpha(h)(m(z)(2))=0.0267+/-0.0011.