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arXiv 0903.0676hep-ex
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在大型水切伦科夫探测器中寻找质子通过p -> e^+ pi^0和p -> mu^+ pi^0衰变

Search for Proton Decay via p -> e^+ pi^0 and p -> mu^+ pi^0 in a Large Water Cherenkov Detector

Kamiokande Collaboration, H. Nishino, S. Clark

摘要:

我们利用超级神冈-I和超级神冈-II的91.7千吨/年和49.2千吨/年的数据,通过p -> e^+ pi^0和p -> mu^+ pi^0寻找质子衰变。没有观察到候选事件与预期的背景引起的大气中微子的0.3事件的每个衰变模式。根据这些结果,我们将p -> e^+ pi^0和p -> mu^+ pi^0模式的部分寿命下限分别设定为8.2 $\times10^{33}$和6.6 $\times10^{33}$年,置信水平为90%。

英文摘要:

We have searched for proton decays via p -> e^+ pi^0 and p -> mu^+ pi^0 using data from a 91.7 kiloton year exposure of Super-Kamiokande-I and a 49.2 kiloton year exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2$\times10^{33}$ and 6.6$\times10^{33}$ years at 90% confidence level for p -> e^+ pi^0 and p -> mu^+ pi^0 modes, respectively.

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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