Measurement of the form factors in the decay D sup + r arrow K sup *0 e sup +. nu. sub e

Journal Article · Mon Nov 19 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.2630· OSTI ID:6044664

Anjos, J C; Appel, J A; Bean, A; Bracker, S B; Browder, T E; Cremaldi, L M; Duboscq, J E; Elliott, J R; Escobar, C O; Gibney, M C; Hartner, G F; Karchin, P E; Kumar, B R; Losty, M J; Luste, G J; Mantsch, P M; Martin, J F; McHugh, S; Menary, S R; Morrison, R J ; Nash, T; Ong, P; Pinfold, J; Punkar, G; Purohit, M V; Santoro, A F.S.; Schmidt, D M; Sidhu, J 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; CA (USA) Carleton University; Ottawa; Ontario (Canada) Centro Brasileiro de Pesquisas Fisicas; Rio de Janeiro (Brazil) University of Cincinnati; Cincinnati; OH (USA) University of Colorado; Boulder; CO (USA) Fermi National Accelerator Laboratory; Batavia; IL (USA) University of Mississippi; Oxford; MS (USA) National Research Council; Ottawa; Ontario; (Canada) Princeton University; Princeton; NJ (USA) Universidade de Sao Paulo; Sao Paulo (Brazil) University of T

We have measured the three form factors governing the decay {ital D}{sup +}{r arrow}{ital {bar K}} {sup *0}{ital e}{sup +}{nu}{sub {ital e}}, observed in Fermilab photoproduction experiment E691, using the complete decay distribution of the data. The results are {ital A}{sub 1}(0)=0.46{plus minus}0.05{plus minus}0.05, {ital A}{sub 2}(0)=0.0{plus minus}0.2{plus minus}0.1, and {ital V}(0)=0.9{plus minus}0.3{plus minus}0.1 for the two axial-vector and the vector form factors, respectively. The {ital {bar K}} {sup *0} mesons have a ratio of longitudinal to transverse polarization of 1.8{sub {minus}0.4}{sup +0.6}{plus minus}0.3. These results are significantly different from values predicted by a number of different models.

• OSTI ID: 6044664
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:21; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
D PLUS MESONS
DATA
DECAY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
FIELD THEORIES
HADRONS
INFORMATION
INTERACTIONS
K 0-1350 MESONS
KOBAYASHI-MASKAWA MATRIX
LEPTONS
MASSLESS PARTICLES
MATRICES
MATRIX ELEMENTS
MESONS
MONTE CARLO METHOD
NEUTRINOS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE PRODUCTION
PHOTOPRODUCTION
POSITRONS
PSEUDOSCALAR MESONS
SCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES
UNIFIED-FIELD THEORIES
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY