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Improved measurement of the K+-->pi+nunu; branching ratio
V V Anisimovsky1, A V Artamonov, B Bassalleck
1Institute for Nuclear Research RAS, 60 October Revolution Prospect 7a, 117312 Moscow, Russia.
Abstract:
An additional event near the upper kinematic limit for K+-->pi(+)nunu; has been observed by experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+-->pi(+)nunu;)=(1.47(+1.30)(-0.89))x10(-10) based on three events observed in the pion momentum region 211
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