Indication for Large Rescatterings in Charmless Rare B Decays

20 August 2003

journal article
Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A

Vol. 18 (25) , 1763-1772
https://doi.org/10.1142/s0217732303011551

Abstract

The current wealth of charmless B decay data may suggest the presence of final state rescattering. In a factorized amplitude approach, better fits are found by incorporating two SU(3) rescattering phase differences, giving δ ~ 65° and σ ~ 90°–100°. Fitting with unitarity phase ϕ₃ as a fit parameter gives ϕ₃ ~ 96°, the CP asymmetries A_{π π}, S_{π π} agree better with BaBar, and the σ phase is slightly lower. Keeping ϕ₃=60° fixed in fit gives S_{π π} ~ -0.9, which agrees better with Belle. With the sizable δ, σ rescattering phases as fitted, many direct CP asymmetries flip sign, and B⁰→π⁰π⁰, K^-K⁺ rates are of order 10^-6, which can be tested soon.

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