Observation of [Formula presented] Decay

In factorization models with Nc≃2-3, where Nc is the effective number of colors, the ωπ mode is larger than the ωK mode by a factor of 2 or more. This result is borne out by further studies in the QCD factorization and perturbative QCD (pQCD). This paper reports on the measurements of B-→ωK- and ωπ- decays that indicate that the former is more prominent.