The doubly Cabibbo-suppressed decay D + → K + π − π

• Published in: Physics letters. B 1997-07, Vol.404 (1), p.187-193
• Main Authors: Aitala, E.M., Amato, S., Anjos, J.C., Appel, J.A., Ashery, D., Banerjee, S., Bediaga, I., Blaylock, G., Bracker, S.B., Burchat, P.R., Burnstein, R.A., Carter, T., Carvalho, H.S., Copty, N.K., Cremaldi, L.M., Darling, C., Denisenko, K., Fernandez, A., Gagnon, P., Gounder, K., Halling, A.M., Herrera, G., Hurvits, G., James, C., Kasper, P.A., Kwan, S., Langs, D.C., Leslie, J., Lundberg, B., May Tal-Beck, S., Meadows, B., de Mello Neto, J.R.T., Milburn, R.H., de Miranda, J.M., Napier, A., Nguyen, A., d'Oliveira, A.B., O'Shaughnessy, K., Peng, K.C., Perera, L.P., Purohit, M.V., Quinn, B., Radeztsky, S., Rafatian, A., Reay, N.W., Reidy, J.J., dos Reis, A.C., Rubin, H.A., Santha, A.K.S., Santoro, A.F.S., Schwartz, A.J., Sheaff, M., Sidwell, R.A., Slaughter, A.J., Sokoloff, M.D., Stanton, N.R., Stenson, K., Summers, D.J., Takach, S., Thorne, K., Tripathi, A.K., Watanabe, S., Weiss-Babai, R., Wiener, J., Witchey, N., Wolin, E., Yi, D., Yoshida, S., Zaliznyak, R., Zhang, C.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(97)00609-6

We report the observation of the doubly Cabibbo-suppressed decay D + → K + π − π + in data from Fermilab charm hadroproduction experiment E791. With a signal of 59 ± 13 events we measured the ratio of the branching fraction for this mode to that of the Cabibbo-favored decay D + → K − π + π + to be B(D + → K + π − π +) / B( D + → K − π + π +) = (7.7 ± 1.7 ± 0.8) × 10 −3. A Dalitz plot analysis was performed to search for resonant structures.