FSI and rare B decays: B-->ππ, rhorho
classification
✦ hep-ph
keywords
channelconsiderablydecaysdominateexplainsfinalinteractioninteractions
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The final state interactions (FSI) model, in which soft rescattering of low mass intermediate states dominate, is suggested. It explains why the strong interaction phases are large in the $B_d\to\pi\pi$ channel and are considerably smaller in the $B_d\to\rho\rho$ one.
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