Measurement of the B0→ϕK*0 Decay Amplitudes

With a sample of about 227×106 BB̅ pairs recorded with the BABAR detector we perform a full angular analysis of the decay B0→ϕK*0(892). We make novel measurements of five parameters sensitive to CP violation. We also measure the branching fraction to be (9.2±0.9±0.5)×10-6 and determine the fractions of longitudinal and parity-odd transverse contributions as fL=0.52±0.05±0.02 and f⊥=0.22±0.05±0.02. The phases of the parity-even and parity-odd transverse amplitudes relative to the longitudinal amplitude are found to be ϕ∥=2.34-0.20+0.23±0.05  rad and ϕ⊥=2.47±0.25±0.05  rad. We also observe the decay B0→ϕK*0(1430).