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[en] This paper, using the ARGUS detector at the e+e- storage ring DORIS II, reports on observed inclusive Ds production, using the channel Dbars → φπ-, in decays of B mesons produced on the Γ(4S). The product of branching ratios BR(B → DsX) productBR(Dbars → φπ-) is (4.2 ± 0.9 ± 0.6) x 10-3. The Ds momentum spectrum suggests a substantial two-body component to the final states of B → Ds X decays
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Cameron, J.M.; Campbell, B.A.; Kamal, A.N.; Khanna, F.C.; Ng, J.; Poutissou, J.M; 616 p; ISBN 9971-50-302-6; 
; 1987; p. 396-405; World Scientific Pub. Co; Teaneck, NJ (United States); 2. Lake Louise winter institute on new frontiers in particle physics; Alberta (Canada); 15-21 Feb 1987; CONF-870279--; World Scientific Pub. Co., 687 Hartwell Street, Teaneck, NJ 07666 (USA)
; 1987; p. 396-405; World Scientific Pub. Co; Teaneck, NJ (United States); 2. Lake Louise winter institute on new frontiers in particle physics; Alberta (Canada); 15-21 Feb 1987; CONF-870279--; World Scientific Pub. Co., 687 Hartwell Street, Teaneck, NJ 07666 (USA)