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 +

Journal Article · Mon Nov 16 00:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.2892· OSTI ID:7199794

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 ^[1]

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1. University of California-Santa Barbara Santa Barbara, California 93106 (United States) Carleton University, Ottawa, Ontario, K1S 5B6 (Canada) Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil 22290 (United States) University of Colorado, Boulder, Colorado 80309 (United States) Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) National Research Council, Ottawa, Ontario, K1A OR6 (Canada) Universidade de Sao Paulo, Sao Paulo (Brazil) University of Toronto, Torno

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%.

• OSTI ID: 7199794
• Journal Information: Physical Review Letters; (United States), Vol. 69:20; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
D PLUS MESONS
HADRONIC PARTICLE DECAY
D S MESONS
BRANCHING RATIO
CABIBBO ANGLE
EXPERIMENTAL DATA
KAONS PLUS
MASS SPECTRA
PHI-1020 MESONS
QUARKS
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INFORMATION
KAONS
MESONS
NUMERICAL DATA
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKONIUM
SPECTRA
STRANGE MESONS
STRANGE PARTICLES
STRANGEONIUM
VECTOR MESONS
662350* - Decays of Mesons- (1992-)
662210 - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)