Phys. Rev. D 45, 2196–2211 (1992)Resonant substructure in K̅ πππ decays of D mesonsReceived 23 September 1991; published in the issue dated 1 April 1992 We determine the resonant substructure of D→K̅ πππ decays, extracting the relative fractions and phases of the amplitudes contributing to the K-π+π+π-, K̅ 0π+π+π-, K-π+π+π0, and K̅ 0π+π-π0 final states. We find that two-body decay modes account for at least 75% of these decays. We obtain branching ratios for D→K̅ a1(1260), D→K̅ *ρ, D→K̅ 1(1270)π, D→K̅ 1(1400)π, and D0→K̅ 0ω decay modes, as well as for several three- and four-body decay modes. In the case of D→K̅ a1(1260) and D→K̅ *ρ, we obtain the branching ratios for all three possible isospin combinations, enabling us to extract the isospin-½ and -3/2 amplitudes, and their relative phases. We find that the isospin-3/2 amplitudes are suppressed relative to the isospin-½ amplitudes. This implies that the widths of the D+ modes are suppressed relative to those of the D0, confirming that an understanding of the lifetime difference of the D0 and D+ depends on an understanding of two-body hadronic decays. For the D→K̅ *ρ decay modes, we obtain detailed information on the polarization of the K̅ * and ρ. This enables us to place constraints on the form factors for D→K̅ * and D→ρ transitions. A comparison of our results on D→K̅ *ρ decays with recent results on semileptonic decays allows us to test the factorization hypothesis. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.45.2196
DOI:
10.1103/PhysRevD.45.2196
PACS:
13.25.+m
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.