Measurement of the hadronic structure of semileptonic D sup 0 and D sup + decays

• Published in: Physical review letters Vol. 66:8
• Main Authors: Bai, Z., Bolton, T., Brown, J.S., Bunnell, K.O., Burchell, M., Burnett, T.H., Cassell, R.E., Coffman, D., Cook, V., Coward, D.H., DeJongh, F., Dorfan, D.E., Drinkard, J., Dubois, G.P., Eigen, G., Eisenstein, B.I., Freese, T., Gatto, C., Gladding, G., Grab, C., Heusch, C.A., Hitlin, D.G., Izen, J.M., Kim, P.C., Labs, J., Li, A., Lockman, W.S., Mallik, U., Matthews, C.G., Mincer, A.I., Mir, R., Mockett, P.M., Nemati, B., Odian, A., Parrish, L., Partridge, R., Pitman, D., Richman, J.D., Sadrozinski, H.F.W., Scarlatella, M., Schalk, T.L., Schindler, R.H., Seiden, A., Simopoulos, C., Stockdale, I.E., Toki, W., Tripsas, B., Villa, F., Wang, M.Z., Wasserbaech, S., Weinstein, A.J., Weseler, S., Willutzki, H.J., Wisinski, D., Wisniewski, W.J., Xu, R., Zhu, Y.
• Format: Journal Article
• Language: English
• Published: United States 25-02-1991
• Subjects: 645103 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties; BOSONS; BRANCHING RATIO; CHARM PARTICLES; CHARMED MESONS; D MESONS; D NEUTRAL MESONS; D PLUS MESONS; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; EXPERIMENTAL DATA; GEV RANGE; GEV RANGE 01-10; HADRONS; INFORMATION; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE KINEMATICS; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; POLARIZATION; PSEUDOSCALAR MESONS; SEMILEPTONIC DECAY; TIME-OF-FLIGHT METHOD; WEAK PARTICLE DECAY
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.66.1011

Absolute branching fractions for the {ital D}{sub {ital l}3} and {ital D}{sub {ital l}4} decays {ital D}{sup +}{r arrow}{ital {bar K}} {sup 0}{ital e+}{nu}{sub {ital e}}, {ital D}{sup +}{r arrow}{ital {bar K}} {sup 0}{mu}{sup +}{nu}{sub {mu}}, {ital D}{sup +}{r arrow}{ital {bar K}} {sup *0}{ital e+}{nu}{sub {ital e}}, and {ital D}{sup 0}{r arrow}{ital K}{sup *{minus}}{ital e+}{nu}{sub {ital e}} are determined using completely reconstructed {ital D{bar D}} events at the {psi}(3770). Reconstructed {ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{ital e+}{nu}{sub {ital e}} decays are used to determine the pole mass of the {ital f}{sub 4}({ital q}{sup 2}) form factor. Resonant {ital K}{sup *} production dominates the process {ital D}{r arrow}{ital K}{pi}{ital e}{nu}; the {ital K}{sup *} polarization is measured. Limits on several Cabibbo-suppressed channels are evaluated. A global fit imposing isospin symmetry is performed to the measured exclusive and inclusive semileptonic {ital D}{sup 0} and {ital D}{sup +} branching fractions to obtain an improved set of branching fractions.