 DOCUMENT METADATASLAC Publication: SLAC-PUB-16772
SLAC Release Date: August 24, 2016
Determination of $\Lambda_{\overline {MS}}$ at five loops from holographic QCD
Deur, Alexandre.
The recent determination of the \beta-function of the QCD running coupling \alpha_{\bar{MS}}(Q^2) at 5-loops, together with improvements in determining the holographic QCD nonperturbative scale parameter \kappa, allows a high accuracy computation of the perturbative QCD scale parameter \Lambda_{\bar{MS}}. We find \Lambda^{(3)}_{\bar{MS}}=0.339\pm0.019 GeV for n_{f}=3, in excellent agreement with the world average, \Lambda_{\bar{MS}}^{(3)}=0.332\pm0.019 GeV. The convergence of the method used for... Show Full Abstract
The recent determination of the \beta-function of the QCD running coupling \alpha_{\bar{MS}}(Q^2) at 5-loops, together with improvements in determining the holographic QCD nonperturbative scale parameter \kappa, allows a high accuracy computation of the perturbative QCD scale parameter \Lambda_{\bar{MS}}. We find \Lambda^{(3)}_{\bar{MS}}=0.339\pm0.019 GeV for n_{f}=3, in excellent agreement with the world average, \Lambda_{\bar{MS}}^{(3)}=0.332\pm0.019 GeV. The convergence of the method used for this determination is discussed. Show Partial Abstract
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