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arXiv 1901.11201hep-ex
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寻找W玻色子衰变到三个带电π介子

Search for W boson decays to three charged pions

CMS Collaboration

摘要:

这是第一次对W玻色子衰变为三个带电π介子的罕见衰变进行了研究。本文分析了CMS实验在质心能量为13 TeV,积分亮度为77.3 fb $^{-1}$时所记录的质子-质子碰撞数据。未观察到显著超出背景预期。W玻色子到三个带电π介子的分支分数的上限为1.01 $\times$ 10 $^{-6}$,置信度为95%。这为该分支分数的理论计算提供了强有力的动力。

英文摘要:

For the first time, a search for the rare decay of the W boson to three charged pions has been performed. Proton-proton collision data recorded by the CMS experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 77.3 fb$^{-1}$, have been analyzed. No significant excess is observed above the background expectation. An upper limit of 1.01 $\times$ 10$^{-6}$ is set at 95% confidence level on the branching fraction of the W boson to three charged pions. This provides a strong motivation for theoretical calculations of this branching fraction.

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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