Study of the doubly Cabibbo-suppressed decay D sup + r arrow. phi. K sup + and the singly Cabibbo-suppressed decay D sub s sup + r arrow. phi. K sup

We have searched for the doubly Cabibbo-suppressed decay {ital D}{sup {plus minus}}{r arrow}{phi} {ital K}{sup {plus minus}} and the singly Cabibbo-suppressed decay {ital D}{sub {ital s}}{sup {plus minus}}{r arrow}{phi} {ital K}{sup {plus minus}} in data from the Fermilab photoproduction experiment...

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Bibliographic Details
Published in:	Physical review letters Vol. 69:20
Main Authors:	Anjos, J.C., Appel, J.A., Bean, A., Bediaga, I., Bracker, S.B., Browder, T.E., Cremaldi, L.M., Duboscq, J.E., Elliot, J.R., Escobar, C.O., Gibney, M.C., Hartner, G.F., Karchin, P.E., Kumar, B.R., Lima, J.G.R., Losty, M.J., Luste, G.J., Mantsch, P.M., Martin, J.F., McHugh, S., Menary, S.R., Morrison, R.J., Nash, T., Pinfold, J., Punkar, G., Purohit, M.V., Ross, W.R., Santoro, A.F.S., Sliwa, K., Sokoloff, M.D., Souza, M.H.G., Spalding, W.J., Streetman, M.E., Stundzia, A.B., Witherell, M.S.
Format:	Journal Article
Language:	English
Published:	United States 16-11-1992
Subjects:	662210 > Specific Theories & Interaction Models BOSONS BRANCHING RATIO CABIBBO ANGLE CHARM PARTICLES CHARMED MESONS D MESONS D PLUS MESONS D S MESONS DATA DECAY ELEMENTARY PARTICLES EXPERIMENTAL DATA FERMIONS HADRONIC PARTICLE DECAY HADRONS INFORMATION KAONS KAONS PLUS MASS SPECTRA MESONS NUMERICAL DATA PARTICLE DECAY Particle Systematics > Unified Theories & Models > (1992-) PHI-1020 MESONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POSTULATED PARTICLES PSEUDOSCALAR MESONS QUARKONIUM QUARKS SPECTRA STRANGE MESONS STRANGE PARTICLES STRANGEONIUM VECTOR MESONS 662350 > Decays of Mesons > (1992-)
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Summary:	We have searched for the doubly Cabibbo-suppressed decay {ital D}{sup {plus minus}}{r arrow}{phi} {ital K}{sup {plus minus}} and the singly Cabibbo-suppressed decay {ital D}{sub {ital s}}{sup {plus minus}}{r arrow}{phi} {ital K}{sup {plus minus}} in data from the Fermilab photoproduction experiment E691. The {ital D}{sup {plus minus}} decay mode is of particular interest because it cannot result from simple spectator decay. We observe a {ital D}{sup {plus minus}} signal corresponding to a branching ratio of {ital B}({ital D}{sup {plus minus}}{r arrow}{phi}{ital K}{sup {plus minus}})=(3.3{sub {minus}1.5}{sup +1.8}{plus minus}0.8){times}10{sup {minus}4}. In the {ital D}{sub {ital s}}{sup {plus minus}} mode we measure an upper limit {ital B}({ital D}{sub {ital s}}{sup {plus minus}}{r arrow}{phi}{ital K}{sup {plus minus}}){lt}0.2%.
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ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.69.2892