First Observation and Dalitz Analysis of the D^0 --> K_S^0 eta pi^0 Decay

Details First Observation and Dalitz Analysis of the D^0 --> K_S^0 eta pi^0 Decay First Observation and Dalitz Analysis of the D^0 --> K_S^0 eta pi^0 Decay

2004-05-07

arxiv.org/abs/hep-ex/0405011v2

Phys.Rev.Lett.93:111801,2004

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages postscript,also available through this http://www.lns.cornell.edu/public/CLNS/, submitted to PRL

Scientific paper

10.1103/PhysRevLett.93.111801

Using 9.0/fb of integrated luminosity in e+e- collisions near Upsilon(4S) mass collected with the CLEO II.V detector we report the first observation of the decay D0 -> K0S ETA PI0 We measure the ratio of branching fractions, BR(D0 -> K0S ETA PI0) / BR(D0 -> K0S PI0) = 0.46 +- 0.07 +- 0.06. We perform a Dalitz analysis of 155 selected D0 -> K0S ETA PI0 candidates and find leading contributions from a_0(980) K0S and K*(892) ETA intermediate states.

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