Measurement of cos2beta in B0->D(*)h0 Decays with a Time-Dependent Dalitz Plot Analysis of D->KSpi+pi-

Details Measurement of cos2beta in B0->D(*)h0 Decays with a Time-Dependent Dalitz Plot Analysis of D->KSpi+pi- Measurement of cos2beta in B0->D(*)h0 Decays with a Time-Dependent Dalitz Plot Analysis of D->KSpi+pi-

2007-08-11

arxiv.org/abs/0708.1544v1

Phys.Rev.Lett.99:231802,2007

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.99.231802

We study the time-dependent Dalitz plot of D->KSpi+pi- in B0->D(*)h0 decays, where h0 is a pi0, eta, eta', or omega meson and D*->Dpi0 using a data sample of 383 X 10^6 Upsilon(4S)->BBbar decays collected with the BABAR detector. We determine cos2beta = 0.42+-0.49+-0.09+-0.13, sin2beta = 0.29+-0.34+-0.03+-0.05, and |lambda| = 1.01+-0.08+-0.02, where the first error is statistical, the second is the experimental systematic uncertainty, and the third, where given, is the Dalitz model uncertainty. Assuming the world average value for sin2beta and |lambda|=1, cos2beta>0 is preferred over cos2beta<0 at 86% confidence level.

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