Time-dependent Dalitz Plot Analysis of B0 to D-K0Pi+ Decays

We present for the first time a measurement of the weak phase 2β + γ obtained from a time-dependent Dalitz plot analysis of B0 → D#-+#K0π± decays. Using a sample of approximately 347 x 106 B(bar B) pairs collected by the BABAR detector at the PEP-II asymmetric-energy storage rings, we obtain 2β + γ = (83 ± 53 ± 20)0 and (263 ± 53 ± 20)o assuming the ratio r of the b → u and b → c decay amplitudes to be 0.3. The magnitudes and phases for the resonances associated with the b → c transitions are also extracted from the fit