Measurement of the ratio B ( D sup 0 r arrow K sup * minus e+. nu. sub e )/ B ( D sup 0 r arrow K sup minus e+. nu. sub e )

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.3394· OSTI ID:5925935

Crawford, G; Fulton, R; Gan, K K; Jensen, T; Johnson, D R; Kagan, H; Kass, R; Malchow, R; Morrow, F; Whitmore, J; Wilson, P; Bortoletto, D; Brown, D; Dominick, J; McIlwain, R L; Miller, D H; Modesitt, M; Ng, C R; Schaffner, S F; Shibata, E I ; Shipsey, I P.J.; Battle, M; Kim, P; Kroha, H; Sparks, K; Thorndike, E H; Wang, C; Alam, M S; Kim, I J; Nemati, B; Romero, V; Sun, C R; Wang, P; Zoeller, M M; Goldberg, M; Haupt, T; Horwitz, N; Jain, V; Kennett, R; Mestayer, M D; Moneti, G C; Rozen, Y; Rubin, P; Skwarnicki, T; Stone, S; Thusalidas, M; Yao, W; Zhu, G; Barnes, A V; Bartelt, J; Csorna, S E; Letson, T; Alexander, J; Artuso, M; Bebek, C; Berkelman, K; Besson, D; Browder, T; Cassel, D G; Cheu, E; Coffman, D M; Drell, P S; Ehrlich, R; Galik, R S; Garcia-Sciveres, M; Geiser, B; Gittelman, B; Gray, S W; Hartill, D L; Heltsley, B K; Honscheid, K; Kandaswamy, J; Katayama, N; Kreinick, D L; Lewis, J D; Ludwig, G S; Masu,

Using the CLEO detector at the Cornell Electron Storage Ring, we have performed a direct measurement of the ratio of {ital D}{sup 0} semileptonic branching fractions into vector and pseudoscalar final states. We find {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup *{minus}}{ital e+}{nu}{sub {ital e}})/{ital B}({ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{ital e+}{nu}{sub {ital e}})=0.51{plus minus} 0.18{plus minus}0.06, in agreement with the ratio derived by the E691 experiment which compares {ital D}{sup +} and {ital D}{sup 0} final states. We also set an upper limit on the ratio {ital B}({ital D}{sup 0}{r arrow}{ital {bar K}}{sup *0}{pi}{sup {minus}}{ital e+}{nu}{sub {ital e}})/{ital B}({ital D}{sup 0}{r arrow}{ital K}{sup *{minus}}{ital e}{nu}{sub {ital e}}){lt}0.64 at 90% confidence level.

• DOE Contract Number: FG05-86ER40272
• OSTI ID: 5925935
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 44:11; ISSN 0556-2821; ISSN PRVDA
• Country of Publication: United States
• Language: English

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662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
CESR STORAGE RING
CHARM PARTICLES
CHARMED MESONS
D MESONS
D NEUTRAL MESONS
DECAY
ELECTRON NEUTRINOS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
KAONS
KAONS MINUS
LEPTONS
LIFETIME
MASSLESS PARTICLES
MATTER
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE PRODUCTION
POSITRONS
PSEUDOSCALAR MESONS
SEMILEPTONIC DECAY
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
VECTOR MESONS
WEAK PARTICLE DECAY