Direct measurement of charmed D+ and D0 semileptonic branching ratios

R. M. Baltrusaitis, J. J. Becker, G. T. Blaylock, J. S. Brown, K. O. Bunnell, T. H. Burnett, R. E. Cassell, D. Coffman, V. Cook, D. H. Coward, S. Dado, C. Del Papa, D. E. Dorfan, G. P. Dubois, A. L. Duncan, K. F. Einsweiler, B. I. Eisenstein, R. Fabrizio, G. Gladding, F. GrancagnoloR. P. Hamilton, J. Hauser, C. A. Heusch, D. G. Hitlin, L. Koepke, W. S. Lockman, P. M. Mockett, L. Moss, R. F. Mozley, A. Nappi, A. Odian, R. Partridge, J. Perrier, S. A. Plaetzer, J. D. Richman, J. R. Roehrig, J. J. Russell, H. F.W. Sadrozinski, M. Scarlatella, T. L. Schalk, R. H. Schindler, A. Seiden, J. C. Sleeman, A. L. Spadafora, J. J. Thaler, W. Toki, B. Tripsas, F. Villa, A. Wattenberg, A. J. Weinstein, N. Wermes, H. J. Willutzki, D. E. Wisinski, W. J. Wisniewski

Research output: Contribution to journalArticlepeer-review


Measurements of the semileptonic branching ratios of charmed D+ and D0 mesons are presented, from data collected at the (3770) in the Mark III detector at SPEAR. From a sample of events kinematically selected as charmed D+D- or D0D0 pairs, the branching ratios R(D+e++X)=( and R(D0e++X)=( are obtained. The ratio of these measurements can be interpreted as the ratio of D+ and D0 lifetimes +0=2.3-0.4-0.1+0.5+0.1 by neglect of the contribution of Cabibbo-suppressed decays to the total decay width.

Original languageEnglish (US)
Pages (from-to)1976-1979
Number of pages4
JournalPhysical review letters
Issue number18
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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