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arXiv 1602.06112hep-ph
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从强子τ衰变数据更新确定手征耦合和真空凝聚

Updated determination of chiral couplings and vacuum condensates from hadronic tau decay data

A. Rodríguez-Sánchez, M. González-Alonso, A. Pich

摘要:

我们分析的最低频谱矩的左右两点关联函数,使用所有已知的短距离的限制和最近更新的ALEPH V-A从tau衰变谱函数。这些信息被用来确定手征微扰理论的低能耦合L10和C87以及对左右相关器的算子乘积展开的最低维贡献。一个详细的统计分析,以评估理论的不确定性,包括违反夸克强子对偶性。

英文摘要:

We analyze the lowest spectral moments of the left-right two-point correlation function, using all known short-distance constraints and the recently updated ALEPH V-A spectral function from tau decays. This information is used to determine the low-energy couplings L10 and C87 of chiral perturbation theory and the lowest-dimensional contributions to the Operator Product Expansion of the left-right correlator. A detailed statistical analysis is implemented to assess the theoretical uncertainties, including violations of quark-hadron duality.

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