Preliminary look at D0  P P (p0) decays S. Davis, C. Plager, M Preliminary look at D0  P P (p0) decays S. Davis, C. Plager, M. Selen April/6/2001 Look for 6 D0 decay modes: K+p-, p+p-, K+K-, K+p-p0, p+p-p0, K+K-p0 Demand that D0 comes from D*+  D0p+

K+p-p0 K+p- CLEO II.V Data

p+p-p0 p+p- CLEO II.V Data

K+ K- K+ K-p0 CLEO II.V Data

K+p- Data MC K+p- K+p-p0 K+p-p0 XD* XD*

Ignoring systematics, monte carlo statistics, and common sense: Mode PDG (%) Very Prelim (%) K+p- 3.83  0.09 reference p+p- 0.15  0.01 0.12  0.005 K+K- 0.43  0.02 0.40  0.010 K+p-p0 13.9  0.9 p+p-p0 2.32  1.12 2.16  0.060 K+K-p0 0.30  0.13 0.28  0.018

K+p-p0 M(K+p-)2 M(p+p0)2 M(p+p0)2 M(K+p-)2 CLEO II.V Data M(K-p0)2

p+p-p0 M(p+p-)2 M(p+p0)2 M(p+p0)2 M(p+p-)2 CLEO II.V Data M(p-p0)2

K+ K-p0 M(K+ K-)2 M(K+p0)2 M(K+p0)2 M(K+p-)2 CLEO II.V Data M(K-p0)2

Partial To Do List Efficiency & Yields in BR measurements. Lots of work for Dalitz analyses. Endless systematics ! We are just getting started ! (Scott will be busy)