论文标题
基于$τ$的新评估对MUON异常磁矩真空极化片段的耐加力贡献
New $τ$-based evaluation of the hadronic contribution to the vacuum polarization piece of the muon anomalous magnetic moment
论文作者
论文摘要
我们对衰减$τ^ - \toπ^-π^0ν_τ$进行重新审视差异和电磁校正，这使其用作两位数的输入对（领先的）HADRONIC HADRONIC VACUUM PALICALIZER贡献了MUON磁性磁矩的一部分。我们扩展了先前的共振性手性拉格朗日分析，其中包括那些通过包括下一个转向式术语的贡献，包括那些将近级阶命令性手性低能量常数饱和饱和的操作员。结果，我们改善了两杆tau衰减与$ e^+e^ - $数据之间的一致性，并减少实验和SM预测$A_μ$（使用$τ$输入）之间的差异。
We revisit the isospin-breaking and electromagnetic corrections to the decay $τ^-\toπ^-π^0ν_τ$, which allow its use as input in the two-pion contribution to the (leading order) hadronic vacuum polarization part of the muon anomalous magnetic moment. We extend a previous resonance chiral Lagrangian analysis, which included those operators saturating the next-to-leading order chiral low energy constants, by including the contributions of the next subleading terms. As a result, we improve agreement between the two-pion tau decay and $e^+e^-$ data and reduce the discrepancy between experiment and the SM prediction of $a_μ$ (using $τ$ input).
