Optimal renormalization and the extraction of strange quark mass from semi-leptonic τ-decay

2017/03/02 by Ananthanarayan, B., Das, Diganta
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1703.00873

Abstract

We employ optimal renormalization group analysis to semi-leptonic τ-decay polarization functions and extract the strange quark mass from their moments measured by the ALEPH and OPAL collaborations. The optimal renormalization group makes use of the renormalization group equation of a given perturbation series which then leads to closed form sum of all the renormalization group-accessible logarithms which have reduced scale dependence. Using the latest theoretical inputs we find m_s(2\rm GeV) = 106.70 ± 9.36~\rm MeV and m_s(2\rm GeV) = 74.47 ± 7.77~\rm MeV for ALEPH and OPAL data respectively.

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