WEAK PHASES FROM AMPLITUDE PARAMETRIZATION

We determine the weak phases and the amplitudes by proposing an parametrization to each topologies of amplitudes in power of Wolfenstein parameter λ ~ 0.22. Comparing this parametrization with the experimental data, we can obtain the phase ϕ3 from the B → Kπ data up to theoretical uncertainty of O(λ3) ~ 5%. We find that these solutions indicate a large color-suppressed tree amplitude. The extraction of the phase ϕ2 and ϕ3 are consistent with the global unitarity triangle fit.