Resonant substructure in K decays of D mesons

D. Coffman, F. DeJongh, G. P. Dubois, G. Eigen, D. G. Hitlin, C. G. Matthews, A. Mincer, J. Richman, A. J. Weinstein, W. J. Wisniewski, Y. Zhu, T. Bolton, K. O. Bunnell, R. E. Cassell, D. H. Coward, P. C. Kim, J. Labs, A. Odian, D. Pitman, R. H. SchindlerW. Toki, S. Wasserbaech, J. J. Drinkard, C. Gatto, C. A. Heusch, W. S. Lockman, M. Scarlatella, H. F.W. Sadrozinski, T. L. Schalk, A. Seiden, S. Weseler, B. I. Eisenstein, T. Freese, G. Gladding, J. M. Izen, I. E. Stockdale, B. Tripsas, U. Mallik, M. Z. Wang, J. Brown, T. H. Burnett, A. D. Li, R. Mir, P. M. Mockett, B. Nemati, L. Parrish, H. Willutzki

    Research output: Contribution to journalArticlepeer-review


    We determine the resonant substructure of DK» decays, extracting the relative fractions and phases of the amplitudes contributing to the K-++-, K»0++-, K-++0, and K»0+-0 final states. We find that two-body decay modes account for at least 75% of these decays. We obtain branching ratios for DK»a1(1260), DK»* DK»1(1270), DK»1(1400), and D0'K»0 decay modes, as well as for several three- and four-body decay modes. In the case of DK»a1(1260) and DK»*, we obtain the branching ratios for all three possible isospin combinations, enabling us to extract the isospin- and -32 amplitudes, and their relative phases. We find that the isospin-32 amplitudes are suppressed relative to the isospin- 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 DK»* decay modes, we obtain detailed information on the polarization of the K»* and . This enables us to place constraints on the form factors for D'K»* and D transitions. A comparison of our results on D'K»* decays with recent results on semileptonic decays allows us to test the factorization hypothesis.

    Original languageEnglish (US)
    Pages (from-to)2196-2211
    Number of pages16
    JournalPhysical Review D
    Issue number7
    StatePublished - 1992

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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