Searches for lepton number violating K+ decays
Searches for lepton number violating K+ decays
复制标题
搜索违反 K 衰变的轻子数
DOI:
10.1016/j.physletb.2019.07.041
复制
发表时间:
2019
影响因子:
4.4
通讯作者:
Cortina Gil E
中科院分区:
文献类型:
--
作者:
Cortina Gil E
The NA62 experiment at CERN reports a search for the lepton number violating decays K+→ π− e+ e+ and K+→ π− μ+ μ+ using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2× 10− 10 and 4.2× 10− 11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.