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arXiv 0807.4900hep-ex
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搜索tau中的二级电流- -> omega pi- nu_tau

Search for Second-Class Currents in tau- -> omega pi- nu_tau

The BABAR Collaboration, B. Aubert

摘要:

我们报告的$τ^-$衰变成$ωπ^-ν_τ$与$ω\toπ^+π^-π^0$使用的数据包含近3.2亿tau对收集的BABAR探测器在PEP-II不对称能量$B$ -工厂的分析。我们没有发现第二类电流的证据,并在90%的置信水平下将第二类电流与第一类电流之比的上限设定为0.69%。

英文摘要:

We report on an analysis of $τ^-$ decaying into $ωπ^-ν_τ$ with $ω\toπ^+π^-π^0$ using data containing nearly 320 million tau pairs collected with the BABAR detector at the PEP-II asymmetric energy $B$-Factory. We find no evidence for second-class currents and set an upper limit at 0.69% at a 90% confidence level for the ratio of second- to first-class currents.

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