Analytic Perturbation Theory for Practitioners and Upsilon Decay
| dc.creator | Shirkov, D. V. | |
| dc.creator | Zayakin, A. V. | |
| dc.date | 2005-12-24 | |
| dc.date | 2006-11-15 | |
| dc.date.accessioned | 2026-07-07T10:44:34Z | |
| dc.date.available | 2026-07-07T10:44:34Z | |
| dc.description | Within the ghost-free Analytic Perturbation Theory (APT), devised in the last decade for low energy QCD, simple approximations are proposed for 3-loop analytic couplings and their effective powers, in both the space-like (Euclidean) and time-like (Minkowskian) regions, accurate enough in the large range (1--100 GeV) of current physical interest.\par Effectiveness of the new Model is illustrated by the example of $Υ(1\mathrm{S})$ decay where the standard analysis gives $α_s(M_Υ)=0.170\pm 0.004$ value that is inconsistent with the bulk of data for $α_s$. Instead, we obtain $α_s^{Mod}(M_Υ)=0.185\pm 0.005$ that corresponds to $α_s^{Mod}(M_Z)=0.120\pm 0.002 $ that is close to the world average.\par The issue of scale uncertainty for $Υ$ decay is also discussed. | |
| dc.description | 12 pages, 0 figures. Model slightly modified to increase its accuracy. Numerical results upgraded, references added. The issue of scale uncertainty is discussed | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0512325 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0512325 | |
| dc.identifier | Phys.Atom.Nucl.70:775-783,2007 | |
| dc.identifier | doi:10.1134/S1063778807040205 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182635 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Analytic Perturbation Theory for Practitioners and Upsilon Decay | |
| dc.type | text |