A coupled-channel treatment of Cabibbo-angle favoured (D, D s + )→VP decays

Abstract

We have performed a two-channel calculation of Cabibbo-angle favoured decays,D s + →VP. We find a satisfactory fit toS s + →φπ+,ρ0π+ andK+\(\bar K^{ * 0} \) data from ARGUS and E-691. We have also studied Cabbibo-angle favouredD→VP decays in a coupled channel formalism. We coupleD→K*π,Kϱ and\(\bar K^0 \phi \) channels inI=1/2 state, andK*π andKϱ channels inI=3/2 state. We leave the two channels,\(\bar K^0 \omega \) and\(\bar K^{ * 0} \eta \) out of our unitarization scheme. Particular attention is paid to the role of the weak annihilation term in these decays.