English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We employ optimal renormalization group analysis to semi-leptonic$\tau$-decay polarization functions and extract the strange quark mass fromtheir moments measured by the ALEPH and OPAL collaborations. The optimalrenormalization group makes use of the renormalization group equation of agiven perturbation series which then leads to closed form sum of all therenormalization group-accessible logarithms which have reduced scaledependence. Using the latest theoretical inputs we find $m_s(2{\rm GeV}) =106.70 \pm 9.36~{\rm MeV}$ and $m_s(2{\rm GeV}) = 74.47 \pm 7.77~{\rm MeV}$ forALEPH and OPAL data respectively.

Optimal renormalization and the extraction of strange quark mass from semi-leptonic $\tau$-decay