D sup 0 -> phiK-bar sup 0 Decay in the Algebraic Approach to Non-Leptonic Weak Decays

摘要

Contrary to the expectation of naive spectator model, D sup 0 -> phiK-bar sup 0 decay has recently been observed with appreciable branching ratio. In this paper, it is however pointed out that the sizable rate of D sup 0 -> phiK-bar sup 0 decay is, in fact, no surprise in the newly developed algebraic approach to non-leptonic weak interactions and it can be estimated from the well-known rate of K/sub S/ -> 2 pi decays. The value of GAMMA(D sup 0 -> phiK-bar sup 0 ) thus obtained is in good agreement with experiments. The approach uses hard PS-meson extrapolation instead of soft one and deals with long distance physics in earnest, by using the algebraic method developed in the framework of asymptotic flavor symmetry which neverthless maintains a close connection with quark-line diagrams. (ERA citation 13:023482)