Measurement of CP-Violating Asymmetries in $B^0\to(ρπ)^0$ Using a Time-Dependent Dalitz Plot Analysis
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We report a measurement of CP-violating asymmetries in $B^0\to(ρπ)^0\toπ^+π^-π^0$ decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 347 million $Υ(4S) \to B\bar{B}$ decays, collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure 26 coefficients of the bilinear form factor terms occurring in the time-dependent decay rate of the \Bz meson and derive the physically relevant quantities from these coefficients. In particular we find a three standard deviation evidence of direct CP-violation in $B^0\toρ^\pmπ^\mp$ decays, with systematic uncertainties included. We also achieve a constraint of the angle $α$ of the Unitarity Triangle. All results presented are preliminary.
32 pages, 13 postscript figures, submitted to ICHEP2006 Fixed typos in the statistical and systematic correlation matrices
32 pages, 13 postscript figures, submitted to ICHEP2006 Fixed typos in the statistical and systematic correlation matrices