Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-08-31
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex2e, 12 pages, 4 figures
Scientific paper
The current phenomenological determinations of $\alpha_s(M_\tau)$ and $\alpha_s(M_Z)$ are shown to be only marginally consistent with the QCD evolution of the strong coupling constant between $M_Z$ and $M_\tau$. This motivates a revised estimate of $\alpha_s(M_\tau)$ since the perturbative series used to extract $\alpha_s(M_\tau)$ from the $\tau$ hadronic width exhibits slow convergence. Pad\'e summation techniques provide an estimate of these unknown higher-order effects, leading to the revised determination $\alpha_s(M_\tau)=0.333\pm 0.030 $. This value is 10% smaller than current estimates, improving the compatibility of phenomenological estimates for $\alpha_s(M_\tau)$ and $\alpha_s(M_Z)$ with the QCD evolution of the strong coupling constant.
Elias Victor
~Steele ~G. T.
No associations
LandOfFree
Compatibility of $α_s(M_τ)$ with $α_s(M_Z)$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Compatibility of $α_s(M_τ)$ with $α_s(M_Z)$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compatibility of $α_s(M_τ)$ with $α_s(M_Z)$ will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-503227