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Coffman, D.; DeJongh, F.; Dubois, G.P.; Eigen, G.; Hitlin, D.G.; Matthews, C.G.; Mincer, A.; Richman, J.; Weinstein, A.J.; Wisniewski, W.J.; Zhu, Y.; Bolton, T.; Bunnell, K.O.; Cassell, R.E.; Coward, D.H.; Kim, P.C.; Labs, J.; Odian, A.; Pitman, D.; Schindler, R.H.; Toki, W.; Wasserbaech, S.; Drinkard, J.J.; Gatto, C.; Heusch, C.A.; Lockman, W.S.; Scarlatella, M.; Sadrozinski, H.F.W.; Schalk, T.L.; Seiden, A.; Weseler, S.; Eisenstein, B.I.; Freese, T.; Gladding, G.; Izen, J.M.; Stockdale, I.E.; Tripsas, B.; Mallik, U.; Wang, M.Z.; Brown, J.; Burnett, T.H.; Li, A.D.; Mir, R.; Mockett, P.M.; Nemat; fP
Physical review. D, Particles and fields, 04/1992, Letnik: 45:7Journal Article
We determine the resonant substructure of {ital D}{r arrow}{ital {bar K}}{pi}{pi}{pi} decays, extracting the relative fractions and phases of the amplitudes contributing to the {ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, {ital {bar K}} {sup 0}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, {ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup 0}, and {ital {bar K}} {sup 0}{pi}{sup +}{pi}{sup {minus}}{pi}{sup 0} final states. We find that two-body decay modes account for at least 75% of these decays. We obtain branching ratios for {ital D}{r arrow}{ital {bar K}a}{sub 1}(1260), {ital D}{r arrow}{ital {bar K}} {sup *}{rho}, {ital D}{r arrow}{ital {bar K}}{sub 1}(1270){pi}, {ital D}{r arrow}{ital {bar K}}{sub 1}(1400){pi}, and {ital D}{sup 0}{r arrow}{ital {bar K}} {sup 0}{omega} decay modes, as well as for several three- and four-body decay modes. In the case of {ital D}{r arrow}{ital {bar K}a}{sub 1}(1260) and {ital D}{r arrow}{ital {bar K}} {sup *}{rho}, we obtain the branching ratios for all three possible isospin combinations, enabling us to extract the isospin-1/2 and -3/2 amplitudes, and their relative phases. We find that the isospin-3/2 amplitudes are suppressed relative to the isospin-1/2 amplitudes. This implies that the widths of the {ital D}{sup +} modes are suppressed relative to those of the {ital D}{sup 0}, confirming that an understanding of the lifetime difference of the {ital D}{sup 0} and {ital D}{sup +} depends on an understanding of two-body hadronic decays. For the {ital D}{r arrow}{ital {bar K}} {sup *}{rho} decay modes, we obtain detailed information on the polarization of the {ital {bar K}} {sup *} and {rho}. This enables us to place constraints on the form factors for {ital D}{r arrow}{ital {bar K}} {sup *} and {ital D}{r arrow}{rho} transitions.
