Search for rareB meson decays intoD s + mesons

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A search has been performed for rareB meson decays intoD s mesons arising frombu transitions,W exchange modes,B + annihilation processes, and decays where theD s + is not produced via aWc \(\bar s\) quark pair coupling, using the ARGUS detector operating on the Ψ(4S) resonance at thee + e storage ring DORIS II. Upper limits for individual decay modes are obtained. In addition, from a study ofD s + - correlations an upper limit of BR (BD s + - X) (90% CL) is determined.