MEASUREMENT OF THE BRANCHING RATIO OF THE DOUBLE DALITZ DECAY K-L-]E(+)E(-)E(+)E(-) AND THE CP PARITY OF THE K-L-MESON
- BARR, G
- BUCHHOLZ, P
- CUNDY, D
- DOBLE, N
- GATIGNON, L
- GRAFSTROM, P
- HAGELBERG, R
- WAHL, H
- PEACH, K
- BEIER, T
- BLUMER, H
- COWARD, D
- HEINZ, R
- KLEINKNECHT, K
- LEBER, F
- MAYER, P
- RENK, B
- ROHRER, H
- SANDER, H
- SCHEIDT, J
- STAECK, J
- WAGNER, A
- AUGE, E
- FOURNIER, D
- ICONOMIDOUFAYARD, L
- PERDEREAU, O
- SCHAFFER, A
- SERIN, L
- BERTANZA, L
- CALAFIURA, P
- CALVETTI, M
- CAROSI, R
- CASALI, R
- CERRI, C
- MANNELLI, I
- MARZULLI, V
- NAPPI, A
- PIERAZZINI, G
- HOLDER, M
- KREUTZ, A
- ROST, M
- WERTHENBACH, R
Publication date
February 1995
DOI Publisher
Springer Science and Business Media LLC Journal
Zeitschrift für Physik C Particles and FieldsAbstract
Data from the NA31 experiment at CERN have been used to measure the branching ratio of the double Dalitz decay of the long-lived neutral kaon. Eight events have been found with negligible background. The measured distribution of the angle between the planes of the two e+e--pairs favours a CP=-1 state for the long-lived neutral kaon. © 1995 Springer-Verlag
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