We report a measurement of the relative branching ratio of two Cabibbo-suppressed decay modes: D0 → pi−pi+ and D0 → K−K+. The data were accumulated in the 1990–1991 fixed target run of Fermilab high energy photoproduction experiment E687. The branching ratios of these modes relative to the Cabibbo-allowed decay D0 → K−pi+ are also presented. The relative branching ratios are measured to be G(D0 → KK)/G(D0 → pi pi) = 2.53 +- 0.46 +- 0.19, G(D0 → KK)/G(D0 → Kpi) = 0.109 +- 0.007 +- 0.009, and Γ(D0 → pi pi)/Γ(D0 → K pi) = 0.043 +- 0.007 +- 0.003.
A measurement of the Cabibbo-suppressed decays D0 → pi−pi+ and D0 → K−K+ / P.L Frabetti, H.W.K. Cheung, J.P. Cumalat, D. Dallapiccola, J.F. Ginkel, S.V. Greene, W. Johns, M.S Nehring, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S.A. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, S. Shukla, M. Vittone, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, R. Culbertson, R.W. Gardner, R. Greene, J. Wiss, G. Alimonti, G. Bellini, B. Caccianiga, L. Cinquini, M. Di Corato, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Moroni, D. Pedrini, L. Perasso, A. Sala, S. Sala, D. Torretta, D. Buchholz, D. Claes, B. Gobbi, B. O'Reilly, J.M. Bishop, N.M. Cason, C.J. Kennedy, G.N. Kim, T.F. Lin, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, V. Arena, G. Boca, C. Castoldi, G. Gianini, S.P. Ratti, C. Riccardi, P. Vitulo, A. Lopez, G.P. Grim, V.S. Paolone, P.M. Yager, J.R. Wilson, P.D. Sheldon, F. Davenport, J.F. Filaseta, G.R. Blackett, M. Pisharody, T. Handler, B.J. Cheon, J.S. Kang, K.Y. Kim. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 321:3(1994 Jan 27), pp. 295-302. [10.1016/0370-2693(94)90479-0]
A measurement of the Cabibbo-suppressed decays D0 → pi−pi+ and D0 → K−K+
G. Bellini;M. Di Corato;F. Leveraro;E. Meroni;G. Gianini;
1994
Abstract
We report a measurement of the relative branching ratio of two Cabibbo-suppressed decay modes: D0 → pi−pi+ and D0 → K−K+. The data were accumulated in the 1990–1991 fixed target run of Fermilab high energy photoproduction experiment E687. The branching ratios of these modes relative to the Cabibbo-allowed decay D0 → K−pi+ are also presented. The relative branching ratios are measured to be G(D0 → KK)/G(D0 → pi pi) = 2.53 +- 0.46 +- 0.19, G(D0 → KK)/G(D0 → Kpi) = 0.109 +- 0.007 +- 0.009, and Γ(D0 → pi pi)/Γ(D0 → K pi) = 0.043 +- 0.007 +- 0.003.
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