Measurement of phi_3 with Dalitz Plot Analysis of B->D(*)K Decay at Belle

Details Measurement of phi_3 with Dalitz Plot Analysis of B->D(*)K Decay at Belle Measurement of phi_3 with Dalitz Plot Analysis of B->D(*)K Decay at Belle

2004-11-14

arxiv.org/abs/hep-ex/0411049v2

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 10 figures, contributed to FPCP2004. Fig. 5 and 6 corrected, mentioned ambiguity of the result

Scientific paper

We present a measurement of the unitarity triangle angle phi_3 using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B->D(*)K process. Using a 253 fb-1 data sample collected by the Belle experiment, we obtain 276 signal candidates for B->DK and 69 candidates for B->D*K, where the neutral D meson decays into K_Spi+pi-. From a combined maximum likelihood fit to the B->DK and B->D*K modes, we obtain phi_3=68+14-15(stat)+-13(syst)+-11(model). The corresponding two standard deviation interval is 22

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