Parametrization of the Standard Model description of hadronic tau decays
Improved hadronic vector-isovector spectral function from tau -decay and electrop...
Padé approximants and the QCD perturbative series for tau decays into hadrons
| Full text | |
| Author(s): |
Boito, Diogo
;
Jamin, Matthias
;
Miravitllas, Ramon
Total Authors: 3
|
| Document type: | Journal article |
| Source: | NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS; v. 287, p. 4-pg., 2017-06-01. |
| Abstract | |
The QCD coupling, as, is not a physical observable since it depends on conventions related to the renormalization procedure. Here we discuss a redefinition of the coupling where changes of scheme are parametrised by a single parameter C. The new coupling is denoted alpha(s)., and its running is scheme independent. Moreover, scheme variations become completely analogous to renormalization scale variations. We discuss how the coupling as can be used in order to optimize predictions for the inclusive hadronic decays of the tau lepton. Preliminary investigations of the C-scheme in the presence of higher-order terms of the perturbative series are discussed here for the first time. (AU) | |
| FAPESP's process: | 15/20689-9 - Precise determination of fundamental QCD parameters |
| Grantee: | Diogo Rodrigues Boito |
| Support Opportunities: | Research Grants - Young Investigators Grants |