Phys. Rev. D
61,
032005
(2000)
[17 pages]
Search for flavor-changing neutral currents and lepton-family-number violation in two-body D0 decays
D. Pripstein et al.
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D. Pripstein*, G. Gidal, P. M. Ho†, M. S. Kowitt‡, and K. B. Luk
Physics Division, Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720
L. D. Isenhower, M. E. Sadler, and R. Schnathorst§
Abilene Christian University, Abilene, Texas 79699
L. M. Lederman** and M. H. Schub††
University of Chicago, Chicago, Illinois 60637
C. N. Brown, W. E. Cooper, K. N. Gounder‡‡, and C. S. Mishra
Fermi National Accelerator Laboratory, Batavia, Illinois 60510
T. A. Carey, D. M. Jansena, R. G. Jeppesenb, J. S. Kapustinsky, D. W. Lanec, M. J. Leitch, J. W. Lillberg, P. L. McGaughey, J. M. Moss, and J. C. Peng
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
D. M. Kaplan**, W. R. Luebke**, R. S. Preston, J. Sa, and V. Tanikella
Northern Illinois University, DeKalb, Illinois 60115
R. L. Childers, C. W. Darden, and J. R. Wilson
University of South Carolina, Columbia, South Carolina 29208
G. C. Kiang and P. K. Teng
Institute of Physics, Academia Sinica, Taipei, Taiwan
Y. C. Chend
National Cheng Kung University, Tainan, Taiwan
Received 8 June 1999; published 11 January 2000
We present the results of a search for the three neutral charm decays D0→μ±e∓, D0→μ+μ-, and D0→e+e-. This study was based on data collected in Experiment 789 at the Fermi National Accelerator Laboratory using 800GeV/c proton-Au and proton-Be interactions. No evidence is found for any of the decays. Upper limits on the branching ratios, at the 90% confidence level, of 1.56×10-5 for D0→μ+μ-, 8.19×10-6 for D0→e+e- and 1.72×10-5 for D0→μ±e∓ are obtained.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.032005
DOI:
10.1103/PhysRevD.61.032005
PACS:
13.20.Fc, 13.25.Ft, 13.85.-t, 14.40.Lb
*Present address: Kellogg Laboratory, California Institute of Technology, Pasadena, CA 91125. †Present address: Visa International, 3055 Clearview Way, MS 3A, San Mateo, CA 94402. ‡Present address: Stanford Research Systems, 1290 D Reamwood Avenue, Sunnyvale, CA 94089. §Present address: Department of Physics, Purdue University, Lafayette, IN 47907. **Present address: Department of Physics, Illinois Institute of Technology, Chicago, IL 60616. ††Present address: Cypress Semiconductor, Minneapolis, MN 55455. ‡‡Present address: Department of Physics, University of California, Riverside, CA 92521. aPresent address: Max-Planck-Institut fur Kernphysik, Heidelberg, Germany. bPresent address: Science Applications International Corp., 2950 Patrick Henry Dr., Santa Clara, CA 95054. cPresent address: Department of Physics, Iowa State University, Ames, IA 50011-3160. dPresent address: Institute of Physics, Academia Sinica, Taipei, Taiwan.
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