Compatibility of $α_s(M_τ)$ with $α_s(M_Z)$
| dc.creator | Steele, T. G. | |
| dc.creator | Elias, V. | |
| dc.date | 1998-08-31 | |
| dc.date.accessioned | 2026-07-07T04:04:40Z | |
| dc.date.available | 2026-07-07T04:04:40Z | |
| dc.description | The current phenomenological determinations of $α_s(M_τ)$ and $α_s(M_Z)$ are shown to be only marginally consistent with the QCD evolution of the strong coupling constant between $M_Z$ and $M_τ$. This motivates a revised estimate of $α_s(M_τ)$ since the perturbative series used to extract $α_s(M_τ)$ from the $τ$ hadronic width exhibits slow convergence. Padé summation techniques provide an estimate of these unknown higher-order effects, leading to the revised determination $α_s(M_τ)=0.333\pm 0.030 $. This value is 10% smaller than current estimates, improving the compatibility of phenomenological estimates for $α_s(M_τ)$ and $α_s(M_Z)$ with the QCD evolution of the strong coupling constant. | |
| dc.description | Latex2e, 12 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9808490 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9808490 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48187 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Compatibility of $α_s(M_τ)$ with $α_s(M_Z)$ | |
| dc.type | text |