Problems with extractingmsfrom flavor breaking in hadronic τ decays

1998/04/15 by Kim Maltman · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.58.093015

published as Phys.Rev. D58 (1998) 093015 · 8 pages, Latex

arxiv created 1998/04/15 · openalex publication_date 1998/10/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

A numerical error is pointed out in the existing expression for the O(\ensuremathα_s²) longitudinal component of the squared-mass (D=2) contribution to the hadronic \ensuremathτ decay rate. The corrected version is found to be such that, to O(\ensuremathα_s²), each term in the resulting series is larger than the previous one, hence ruling out the direct use of flavor breaking in hadronic \ensuremathτ decays as a means of extracting the strange quark mass. An alternate approach, in which one uses the model spectral functions previously developed for the strangeness-changing scalar channel (and employed in alternate sum rule analyses of m_s) as input to the \ensuremathτ decay analysis, is shown to provide mutual consistency checks for the two different methods. The results for m_s implied by \ensuremathτ decay data and the existing model spectral function are also presented.

Citations

• Decay Correlations of Heavy Leptons ine++e−→l++l−
• On the QCD sum rule determination of the strange quark mass
• The strange quark mass from QCD sum rules
• Isospin breaking and the extraction of ms from the τ-decay-like vector current sum rule
• Review of particle properties
• Order-αs3 determination of the strange quark mass

Cited by

• Isospin breaking and the extraction of ms from the τ-decay-like vector current sum rule
• Vus from hadronic τ decays
• αs(MZ2)from hadronicτdecays