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 00:00:00 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), Vol. 44:11; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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