Search for the Lepton-Flavor-Violating Decay τ-→μ-η at Belle

Search for the Lepton-Flavor-Violating Decay τ-→μ-η at Belle
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DOI:
10.1103/physrevlett.93.081803
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发表时间:
2004-04
影响因子:
8.6
通讯作者:
Y. Enari;E. al.
Y. Enari;E. al.
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Y. Enari;E. al.

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我们用KEK的贝儿探测器积累的84.3 fb(-1)的数据样本搜索了轻子味破坏衰变τ(-)-->微(-)η。通过衰变模式检测到eta介子:eta-->伽马射线和pi(+)pi(-)pi(0)。没有发现信号候选者,并且我们在90%置信水平下获得分支分数B(tau(-)-->micro(-)eta)<3.4 x 10(-7)的上限。
We have searched for the lepton flavor violating decay tau(-)-->micro(-)eta using a data sample of 84.3 fb(-1) accumulated with the Belle detector at KEK. The eta meson was detected through the decay modes: eta-->gammagamma and pi(+)pi(-)pi(0). No signal candidates are found, and we obtain an upper limit for the branching fraction B(tau(-)-->micro(-)eta)<3.4 x 10(-7) at the 90% confidence level.