4.7 Article

Upper limit on the branching ratio for the decay π0 → vv- -: art. no. 091102

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PHYSICAL REVIEW D
卷 72, 期 9, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.72.091102

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A sample of kinematically identified K+->pi(+)pi(0) decays obtained with the E949 detector was used to search for the helicity-suppressed decay pi(0)->nu(v) over bar(v) over bar resulting in an upper limit of 2.7x10(-7) at 90% confidence level. The upper limit is also applicable to pi(0) decays into unknown weakly-interacting particles.

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