Searches for lepton flavour and lepton number violation in K+ decays

被引：0
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作者：
Romano, Angela [1 ]
机构：
[1] Univ Birmingham, Birmingham, England
来源：
EUROPEAN PHYSICAL SOCIETY CONFERENCE ON HIGH ENERGY PHYSICS, EPS-HEP2019 | 2020年
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中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
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摘要：
The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K+ -> pi(-)e(+)e(+) and K+ -> pi(-)mu(+)mu(+), using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2 x 10(-10) and 4.2 x 10(-11), respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.
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