Extraction of alpha_s from radiative Upsilon(1S) decays

Preprint

7 February 2007

preprint
Published by arXiv in arXiv

Abstract

We improve on a recent determination of alpha_s from Gamma(Upsilon(1S)-->X gamma)/Gamma(Upsilon(1S)-->X) with CLEO data by taking into account color octet contributions and avoiding any model dependence in the extraction. We obtain alpha_s(M_Upsilon(1S))= 0.184+0.014-0.013, which corresponds to alpha_s(M_Z)=0.119+0.006-0.005.

Keywords

ALPHA_S
CLEO DATA
COLOR
DECAYS
EXTRACTION
OCTET CONTRIBUTIONS
RADIATIVE UPSILON
UPSILON
X GAMMA

All Related Versions

Version 1, 2007-02-07, ArXiv
Version 2, 2007-02-12, ArXiv
Version 3, 2007-03-29, ArXiv
Published version: Physical Review D, 75 (7), 074014.

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