Upper Limit on the Branching Ratio for the Decay $π^0 \to ν\barν$

Details Upper Limit on the Branching Ratio for the Decay $π^0 \to ν\barν$ Upper Limit on the Branching Ratio for the Decay $π^0 \to ν\barν$

2005-06-11

arxiv.org/abs/hep-ex/0506028v2

Phys.Rev.D72:091102,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures; no change in the results, accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.72.091102

A sample of kinematically identified $K^+ \to \pi^+ \pi^0$ decays obtained
with the E949 detector was used to search for the helicity-suppressed decay
$\pi^0 \to \nu \bar{\nu}$ resulting in an upper limit of $2.7\times10^{-7}$ at
90% confidence level.The upper limit is also applicable to $\pi^0$ decays into
unknown weakly interacting particles.

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