Upper limit on the branching ratio for the decay {pi}{sup 0}{yields}{nu}{nu}

A sample of kinematically identified K{sup +}{yields}{pi}{sup +}{pi}{sup 0} decays obtained with the E949 detector was used to search for the helicity-suppressed decay {pi}{sup 0}{yields}{nu}{nu} resulting in an upper limit of 2.7x10{sup -7} at 90% confidence level. The upper limit is also applicabl...

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Veröffentlicht in:	Physical review. D, Particles and fields Particles and fields, 2005-11, Vol.72 (9)
Hauptverfasser:	Artamonov, A.V., Kozhevnikov, A.P., Landsberg, L.G., Mukhin, V.A., Obraztsov, V.F., Patalakha, D.I., Petrenko, S.V., Vavilov, D.V., Bassalleck, B., Lewis, B., Bhuyan, B., Chiang, I-H., Diwan, M.V., Frank, J.S., Jaffe, D.E., Kettell, S.H., Li, K.K., Littenberg, L.S., Redlinger, G., Strand, R.C.
Format:	Artikel
Sprache:	eng
Schlagworte:	BRANCHING RATIO HADRONIC PARTICLE DECAY HELICITY KAONS PLUS LEPTONIC DECAY PARTICLE IDENTIFICATION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS NEUTRAL PIONS PLUS
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Zusammenfassung:	A sample of kinematically identified K{sup +}{yields}{pi}{sup +}{pi}{sup 0} decays obtained with the E949 detector was used to search for the helicity-suppressed decay {pi}{sup 0}{yields}{nu}{nu} resulting in an upper limit of 2.7x10{sup -7} at 90% confidence level. The upper limit is also applicable to {pi}{sup 0} decays into unknown weakly-interacting particles.
ISSN:	0556-2821 1089-4918
DOI:	10.1103/PhysRevD.72.091102