Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-03-17
Phys. Rev. D 81, 112002 (2010)
Physics
High Energy Physics
High Energy Physics - Experiment
10 pages, 5 figures, 4 tables. Replaced by version published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.81.112002
We present a new measurement of the unitarity triangle angle phi3 using a Dalitz plot analysis of the KsPi+Pi- decay of the neutral D meson produced in B->D(*)K decays. The method exploits the interference between D0 and D0bar to extract the angle phi3, strong phase delta and the ratio r of suppressed and allowed amplitudes. We apply this method to a 605 fb-1 data sample collected by the Belle experiment. The analysis uses three decays: B->DK, and B->D*K with D*->DPi0 and D*->Dgamma, as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain phi3 = 78.4^+10.8_-11.6 +- 3.6 (syst) +- 8.9 (model) degrees. CP conservation in this process is ruled out at the confidence level (1-CL)=5x10^-4, or 3.5 standard deviations.
Bondar Alex
Poluektov Anton
The Belle Collaboration
Yabsley B. D.
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