Role of a charm factory in extracting CKM-phase information via B→DK -: art. no. 033003

In this paper we study the impact of data that can be obtained from a charm factory on the determination of the Cabibbo-Kobayashi-Maskawa parameter gamma from decays of the form B-->(DK)-K-0 where the D-0 decays to specific inclusive and exclusive final states. In particular, for each exclusive final state f, the charm factory can determine the strong phase difference between D-0-->f and (D) over bar (0)-->f by exploiting correlations in psi(3770)-->D-0(D) over bar (0). This provides crucial input to the determination of gamma via the interference of B+/--->(K+/-D0)-->f with B+/--->K+/-(D) over bar (0)-->f. We discuss how the method may be generalized to inclusive final states and illustrate with a toy model how such methods may offer one of the best means to determine gamma with O(10(8)-10(9)) B mesons.