2007/03/30 by K. Maltman, Kim Maltman, Maltman, K. +3
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Markov Chains and Monte Carlo Methods #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0703314
4 pages, prepared for the Proceedings of CKM'06, Nagoya, Japan
arxiv created 2007/03/30 · openalex publication_date 2007/03/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We describe how complications encountered in the extraction of Vus from flavor-breaking hadronic tau decay sum rules, in particular those associated with the slower than previously anticipated convergence of the relevant D=2 OPE series, can be successfully dealt with through judicious choices of sum rule weight. Problems with the previously proposed ``(0,0) spectral weight'' version of the analysis, and the much improved situation produced by the use of a number of alternate, non-spectral-weights, are demonstrated. The method is shown to promise a sub-0.0010-accuracy determination of Vus once analysis of the improved strange spectral data from BABAR and BELLE is completed. Connections to the tau versus electroproduction puzzle in the evaluation of the leading order hadronic contribution to (g-2)mu are also discussed.