Search for CP Violation in D^0--> K_S^0 pi^+pi^-

Details Search for CP Violation in D^0--> K_S^0 pi^+pi^- Search for CP Violation in D^0--> K_S^0 pi^+pi^-

2003-11-13

arxiv.org/abs/hep-ex/0311033v2

Phys.Rev.D70:091101,2004

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 3 figures, also available at http://w4.lns.cornell.edu/public/CLNS/, submitted to PRL

Scientific paper

10.1103/PhysRevD.70.091101

We report on a search for CP violation in the decay of D0 and D0B to Kshort pi+pi-. The data come from an integrated luminosity of 9.0 1/fb of e+e- collisions at sqrt(s) ~ 10 GeV recorded with the CLEO II.V detector. The resonance substructure of this decay is well described by ten quasi-two-body decay channels (K*-pi+, K*0(1430)-pi+, K*2(1430)-pi+, K*(1680)-pi+, Kshort rho, Kshort omega, Kshort f0(980), Kshort f2(1270), Kshort f0(1370), and the ``wrong sign'' K*+ pi-) plus a small non-resonant component. We observe no evidence for CP violation in the amplitudes and phases that describe the decay D0 to K_S^0 pi+pi-.

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