Measurement of phi_3 in B->D(*)K Decays at Belle

Details Measurement of phi_3 in B->D(*)K Decays at Belle Measurement of phi_3 in B->D(*)K Decays at Belle

2004-05-18

arxiv.org/abs/hep-ex/0405048v1

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 1 figure, 1 table, Proceedings of Recontres de Moriond 2004 "Electroweak Interactions and Unified Theories"

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 D0 meson from the B+- -> D(*)K+- process. The method employs the interference between D0 and D0bar to extract both the weak and strong phases. We apply this method to the 140 fb-1 of data collected by Belle experiment. The analysis uses B+- -> DK+- and B+- -> D*K+- with D*->Dpi0 modes, where the neutral D meson decays into K_s pi+ pi-. From a combined maximum likelihood fit of B+- -> DK+- and B+- -> D*K+- modes, we obtain phi_3=81^{\circ}+-19^{\circ}+-13(syst)+-11^{\circ}(model). The 95% confidence interval is 35^{\circ}

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