Perturbative quantum chromodynamics: Evidence that αs runs

Clicks: 155
ID: 270588
1994
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Abstract
We consider the theoretical predictions of perturbative quantum chromodynamics (QCD) for the quantities \(R_{e^ + e^ - } \) ,R τ and Γ hadronicZ0. Using αs(M τ)=0.34 −0.05+0.04, we find that αs (34 GeV)=0.140 −0.008+0.006 in agreement with the value extracted from experiment, αs (34 Gev)=0.148(22), and αs (M Z)=0.119(5), in excellent agreement with the experimental value from LEP, αs(M Z)=0.120(7). We show that using only the above value for αs(M τ) as input andno free parameters we can predict αs(μ) forM τ⩽μ⩽200 GeV. Our result is in agreement with all known experimental values. Thus it can be seen that αs truly runs, in agreement with perturbative QCD.
Reference Key
steinfelds1994ilperturbative Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors M. A. Samuel,E. Steinfelds;M. A. Samuel;E. Steinfelds;
Journal il nuovo cimento a
Year 1994
DOI
10.1007/bf02731099
URL
https://sciprofiles.com/publication/view/a54e32f12b2747567db5e1e9e160cf23
Keywords
12.38 - quantum chromodynamics 12.38.bx - perturbative calculations 12.38.qk - experimental tests

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