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D and D meson production near 4 GeV in e+e− annihilation |
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| Authors: | G Goldhaber JE Wiss GS Abrams MS Alam AM Boyarski M Breidenbach W Chinowsky J Dorfan GJ Feldman G Hanson JA Jaros AD Johnson JA Kadyk D Lüke V Lüth HL Lynch RJ Madaras HK Nguyen GH Trilling |
| Institution: | 1. Department of Physics and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720, USA;2. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305, USA |
| Abstract: | We have studied momentum spectra for D0 (0) and D± mesons produced near 4 GeV in e+e? annihilation and find that production is dominated by two-body reactions involving D and D1 states where the D1 (charged and neutral) have masses near 2.01 GeV/c2. A detailed study of D momentum spectra near Ecm = 4.028 GeV allows determination of masses and branching ratios of D and D1 states. Lastly we find that events containing a D0 meson conserve strangeness, thus establishing upper limits on D0-0 mixing and on the effects of charm changing neutral currents. |
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