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Measurements of the properties of D-meson decays

R. H. Schindler*, M. S. Alam†, A. M. Boyarski, M. Breidenbach, D. L. Burke, J. Dorenbosch*, J. M. Dorfan, G. J. Feldman, M. E. B. Franklin et al.

G. Abrams, C. A. Blocker§, A. Blondel, W. C. Carithers, W. Chinowsky, M. W. Coles, S. Cooper**, W. E. Dieterle, J. B. Dillion et al.

G. Hanson, K. G. Hayes*, T. Himel*, D. G. Hitlin‡, R. J. Hollebeek, W. R. Innes, J. A. Jaros, P. Jenni*, R. R. Larsen, V. Lüth, M. L. Perl, B. Richter, A. Roussarie, D. L. Scharre, R. F. Schwitters§, J. L. Siegrist, H. Taureg*, M. Tonutti∥, R. A. Vidal, J. M. Weiss, and H. Zaccone

  • Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305

M. W. Eaton, G. Gidal, G. Goldhaber, A. D. Johnson, J. A. Kadyk, A. J. Lankford, R. E. Millikan, M. E. Nelson, C. Y. Pang, J. F. Patrick, J. Strait, G. H. Trilling, E. N. Vella, and I. Videau††

  • Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720

  • *Present address: CERN, Geneva, Switzerland.
  • †Present address: Vanderbilt University, Nashville, Tenn. 37235.
  • ‡Present address: California Institute of Technology, Pasadena, Calif. 91125.
  • §Present address: Harvard University, Cambridge, Mass. 02138.
  • ∥Present address: Universität Bonn, Federal Republic of Germany.
  • Present address: CEN-Saclay, France.
  • **Present address: DESY, Hamburg, Federal Republic of Germany.
  • ††Present address: Laboratoire de Physique Nucléaire et Hautes Energies, École Polytechnique, Palaiseau, France.
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Phys. Rev. D 24, 78 – Published 1 July, 1981

DOI: https://doi.org/10.1103/PhysRevD.24.78

Abstract

We present a study of the decay properties of charmed D mesons produced near the peak of the ψ′′(3770) resonance in e+e− annihilation. Branching fractions for nine Cabibbo-favored and three Cabibbo-suppressed decay modes are presented along with upper limits on one additional Cabibbo-favored and four additional Cabibbo-suppressed decay modes. A study of Kππ-decay-mode Dalitz plots reveals a large quasi-two-body pseudoscalar-vector component for the D0 decays and an apparent nonuniform population on the Dalitz plot for the D+ decay into K−π+π+. Using tagged events, we measure the charged-particle multiplicity and strange-particle content of D decays. A measurement of the D+ and D0 semileptonic decay fractions indicates that the D+ has a significantly longer lifetime than the D0.

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Phys. Rev. D 24, 78– Published 1 July, 1981
  • Received 11 February 1981

© 1981 American Physical Society

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