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Published September 18, 1989 | Published + Erratum
Journal Article Open

Observation of D_s^+ → K^0K^+ and D_s^+ → K^(*0)K^+ and an Upper Limit on D_s^+ → K^0π^+


We report the first observation of the decay D_s^+ → K^0K^+ and a new measurement of the decay D_s^+→K (892)^0K^+. The data were collected at √s=4.14 GeV with the Mark III detector at the SLAC e^+e^- storage ring at SPEAR. We obtain the relative branching fractions B(D^+_s→K^0K^+/ B(D_s^+→φπ^+)=0.92±0.32±0.20 and B(D_s^+→K^*0K^+)/ B(D_s^+→φπ^+)=0.84±0.30±0.22, using our new determination of σB(D_s^+→φπ^+). A search for the Cabibbo-suppressed decay D^+_s→K^0π^+ yields a limit B(D_s^+→K^0π^+)/B(D_s^+→φπ^+)<0.21 at the 90% confidence level.

Additional Information

© 1989 The American Physical Society. Received 17 May 1989; published in the issue dated 18 September 1989. We gratefully acknowledge the dedicated efforts of the SPEAR staff. One of us (G.E.) wishes to thank the A. von Humboldt Foundation for support. This work was supported by the Department of Energy, under Contracts No. DE-AC03-76SF00515, No. DE-AC02-76ER01195, No. DE-AC03-81ER40050, No. DE-AC02-87ER40318, No. DE-AM03-76SF00034, and by the National Science Foundation.

Attached Files

Published - ADLprl89b.pdf

Erratum - ADLprl89bcorr.pdf


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August 19, 2023
October 17, 2023