Extraction ofαsfrom radiativeΥ(1S)decays

2007/02/28 by Nora Brambilla, Xavier Garcia i Tormo, Joan Soto +1 · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Atomic and Subatomic Physics Research #Mathematics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.75.074014

published as Phys.Rev.D75:074014,2007 · 11 pages. v2: One reference added. v3: Minor modification in an error estimate. Journal version

arxiv created 2007/03/29 · openalex publication_date 2007/04/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We improve on a recent determination of \ensuremathα_s from \ensuremathΓ(\ensuremathΥ(1S)\ensuremath→\ensuremathγX)/\ensuremathΓ(\ensuremathΥ(1S)\ensuremath→X) with CLEO data by taking into account color octet contributions and avoiding any model dependence in the extraction. We obtain \ensuremathα_s(M_\ensuremathΥ(1S))=0.184_\ensuremath-0.014^+0.015, which corresponds to \ensuremathα_s(M_Z)=0.119_\ensuremath-0.005^+0.006.

Citations

• Bottom quark mass and |Vcb| matrix element from and Γs1(b → clνl) in the next-to-next-to-leading order
• bquark low-scale running mass fromΥsum rules
• The QCD Coupling Constant
• QCD corrections to radiative Υ decays
• Review of Particle Physics

Cited by

• O(αsv2) corrections to the hadronic decay of vector quarkonia
• QCD result for the hyperfine splittingMΥ(1S)−Mηband the value ofαs