TWIST实验的盲分析结果
Blind analysis results of the TWIST experiment
摘要：
TRIUMF弱相互作用对称性检验（TWIST）实验旨在高精度地检验极化μ子纯轻子衰变中的标准模型。用四费米子相互作用模型描述μ子衰变。TWIST从动量角谱的形状测量该模型的四个μ子衰变参数中的三个，$ρ$，$δ$和$P_μ^π ξ$。这种模型独立的方法的结果进行了比较，标准模型的预测，并用于约束新的物理。我们的合作已经完成了对2006年和2007年最终实验数据的盲法分析。该分析基本上达到了我们的目标，即比TWIST前的测量精度提高一个数量级。
英文摘要：
The TRIUMF Weak Interaction Symmetry Test (TWIST) experiment was designed to test the standard model at high precision in the purely leptonic decay of polarized muons. A general four-fermion interaction model is used to describe the muon decay. TWIST measures three of the four muon decay parameters of this model, $ρ$, $δ$ and $P_μ^π ξ$, from the shape of the momentum-angle spectrum. The results of this model independent approach are compared to the standard model predictions and used to constrain new physics. Our collaboration has finalized the blind analysis of the final experimental data taken in 2006 and 2007. This analysis mostly reached our goal of a precision of an order of magnitude improvement over the pre-TWIST measurements.
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