With a sample of about 227 × 10 6 B ¯¯¯ B pairs recorded with the BABAR detector we perform a full angular analysis of the decay B 0 → ϕ K * 0 ( 892 ) . We make novel measurements of five parameters sensitive to C P 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 f L = 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 + 0.23 − 0.20 ± 0.05     r a d and ϕ ⊥ = 2.47 ± 0.25 ± 0.05     r a d . We also observe the decay B 0 → ϕ K * 0 ( 1430 ) .

Measurement of the B0→ϕK*0 Decay Amplitudes

FERRONI, Fernando
2004

Abstract

With a sample of about 227 × 10 6 B ¯¯¯ B pairs recorded with the BABAR detector we perform a full angular analysis of the decay B 0 → ϕ K * 0 ( 892 ) . We make novel measurements of five parameters sensitive to C P 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 f L = 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 + 0.23 − 0.20 ± 0.05     r a d and ϕ ⊥ = 2.47 ± 0.25 ± 0.05     r a d . We also observe the decay B 0 → ϕ K * 0 ( 1430 ) .
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/3027
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