Hadronic Phases and Isospin Amplitudes in D ( B ) → ππ and D ( B ) → KK̄
نویسنده
چکیده
Hadronic phases in ππ and KK̄ channels are calculated à la Regge. At the D mass one finds δππ ≃ π3 and δKK̄ ≃ −π6 in good agreement with the CLEO data while at the B mass these angles are predicted to be, respectively, 11◦ and -7◦. With the hadronic phase eKK̄ taken into account, a quark diagram decomposition of the isospin invariant amplitudes in D → KK̄ decays fits the data provided the exchange diagram contribution is about 1/3 of the tree level one.
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