Evidence for the Decay $D^0\to K^+ π^-π^+π^-$

Details Evidence for the Decay $D^0\to K^+ π^-π^+π^-$ Evidence for the Decay $D^0\to K^+ π^-π^+π^-$

2001-08-10

arxiv.org/abs/hep-ex/0108024v1

Phys.Rev.D64:111101,2001

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRD

Scientific paper

10.1103/PhysRevD.64.111101

We present a search for the ``wrong-sign'' decay D0 -> K+ pi- pi+ pi- using 9 fb-1 of e+e- collisions on and just below the Upsilon(4S) resonance. This decay can occur either through a doubly Cabibbo-suppressed process or through mixing to a D0bar followed by a Cabibbo-favored process. Our result for the time-integrated wrong-sign rate relative to the decay D0 -> K- pi+ pi- pi+ is (0.0041 +0.0012-0.0011(stat.) +-0.0004(syst.))x(1.07 +-0.10)(phase space), which has a statistical significance of 3.9 standard deviations.

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