点阵输入tau V-us谜题

K. Maltman , P.A. Boyle , L. DelDebbio , R.J. Hudspith , N. Garron , E. Kerrane , J.M. Zanotti
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引用次数: 0

摘要

最近基于强子τ衰变的破味和规则分析得到的Vus值明显低于基于3族统一性和其他来源的结果的预期值。我们使用晶格数据来研究进入这些分析的破味相关器组合的OPE表示的准确性/可靠性。本文还研究了为减少与D=2 OPE级数的缓慢收敛有关的问题而选择的交替组合的行为,并引入了交替混合τ-产电和规则。根据从晶格数据中吸取的教训,还提出了两种分析的初步更新。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Lattice Input on the τ Vus Puzzle

|Vus| values obtained from recent hadronic-τ-decay-based flavor-breaking sum rule analyses are significantly lower than expectations based on 3-family unitarity and results obtained from other sources. We use lattice data to investigate the accuracy/reliability of the OPE representation of the flavor-breaking correlator combination entering these analyses. The behavior of an alternate combination, chosen to reduce problems associated with the slow convergence of the D=2 OPE series, and entering an alternate mixed τ-electroproduction sum rule, is also investigated. Preliminary updates of both analyses, predicated on lessons learned from the lattice data, are also presented.

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