论文标题
搜索Lepton数字违反$ k^+\toπ^ - （π^0）e^+e^+$衰减
Searches for lepton number violating $K^+\toπ^-(π^0)e^+e^+$ decays
论文作者
论文摘要
搜索Lepton编号违反$ K^+\toπ^-e^+e^+$和$ k^+\toπ^-π^0e^+e^+$衰减是使用NA62实验在CERN 2016-2018收集的完整数据集进行的。 $ 5.3 \ times 10^{ - 11} $和$ 8.5 \ times 10^{ - 10} $的上限是在90％的置信度下获得的。前者的结果比以前的最佳限制提高了四倍，而后者的结果代表了$ K^+\toπ^-π^0e^+e^+$衰减率的第一个限制。
Searches for lepton number violating $K^+\toπ^-e^+e^+$ and $K^+\toπ^-π^0e^+e^+$ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $5.3\times 10^{-11}$ and $8.5\times 10^{-10}$ are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the $K^+\toπ^-π^0e^+e^+$ decay rate.
