Nonleptonic Decays of Charmed Mesons under the W-Exchange Dominance Hypothesis

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概要

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• Two- and three-body decays of charmed mesons are studied under the " W-exchange" dominance hypothesis. As for the two-body decays, the branching ratios for them are calculated in the scalar meson pole approximation. It is seen through a phenomenological analysis that the contribution of the annihilation diagram is much smaller than that of the W-exchange This predicts that the F^+→π^+η decay is considerably suppressed although it is a Cabibbo favored decay. It is also seen that the new Cabibbo angle θ_c' which is defined in the charm changing currents is nearly equal to the old one θ_c. The soft meson technique combined with a linear approximation is applied to the three body decays. The calculated value of B(D^+→π^+π~+K^-) reproduces considerably well the experimental value, but this method is not successful in the other three-body decays of D mesons. The branching ratios for these decays calculated by assuming that quasi two-body decays contribute dominantly to these decays are almost consistent with the known data.

• 理論物理学刊行会の論文
• 1981-09-25

著者

• Terasaki Kunihiko

  Research Institute For Theoretical Physics Hiroshima University

• TERASAKI Kunihiko

  Research Institute for Theoretical Physics, Hiroshima University

関連論文

• Irregular G_u-Parity Term in Non-Leptonic Weak Interactions
• Possible Existence of Urbaryons in Cosmic Rays
• Algebraic Approach in Quantum Chromodynamics and Electroweak Theory
• Nonleptonic Decays of Charmed Mesons under the W-Exchange Dominance Hypothesis
• Hadronic Decays of Ψ and On Photon Intermediate State
• Comment on the Quark Burning Model of Quasars

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