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arXiv 0908.3156hep-ex
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τ衰变为一个轻子和两个带电介子的轻子味和轻子数的寻找

Search for Lepton Flavor and Lepton Number Violating tau Decays into a Lepton and Two Charged Mesons

Y. Miyazaki

摘要:

我们使用KEKB非对称能量e+e对撞机Belle探测器收集的671 fb^{-1}的数据,寻找破坏轻子味和轻子数的τ衰变为一个轻子(ell =电子或μ子)和两个带电介子(h,h' = pi^ \pm或K^ \pm),τ- -> ell + h'-和τ- -> ell+ h-h '-。我们获得了90%的C. L。对于τ-> EHH '过程,分支分数的上限在(4.4-8.8)× 10 ^{-8}范围内,对于τ-> Muhh'过程,分支分数的上限在(3.3-16)× 10 ^{-8}范围内。这些结果比先前公布的上限提高了1.6至8.8倍。

英文摘要:

We search for lepton flavor and lepton number violating tau decays into a lepton (ell = electron or muon) and two charged mesons (h,h' = pi^\pm or K^\pm), tau- -> ell-h+h'- and tau- -> ell+h-h'-, using 671 fb^{-1} of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain 90% C.L. upper limits on the branching fractions in the range (4.4-8.8)x10^{-8} for tau -> ehh', and (3.3-16)x10^{-8} for tau -> muhh' processes. These results improve upon previously published upper limits by factors between 1.6 to 8.8.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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