showing 2 related works from this author
Precision physics in Hadronic Tau Decays
2018
In the Standard Model of Particle Physics, which gives a very precise description of nature at many different scales, hadronic tau decays occur through the interaction of two weak charged currents mediated by the W boson, so it becomes a very nice test of electroweak interactions. On the other hand, the quark current is responsible for a hadronic continuum, which allows to study strong interactions in the nonperturbative regime. In this thesis, some of the most powerful methods, such as the Operator Product Expansion (OPE) in the vacuum, effective field theories, dispersion relations or chiral perturbation theory have used for different phenomenological applications. The first application i…
The strong coupling from ALEPH tau decays
2017
The strong coupling from ALEPH tau decays. We use the publically available non-strange spectral function from ALEPH tau decays to critically analyze the different determinations of αs(mτ2) that can be found in the literature and the numerical impact of their possible weaknesses. We also introduce some novel approaches. We find that perturbative uncertainties dominate. Our results with different approaches are very stable. Our final value is αs(mτ2)=0.328±0.013.