Elsevier

Physics Letters B

Volume 462, Issues 3–4, 16 September 1999, Pages 401-409
Physics Letters B

Search for rare and forbidden dilepton decays of the D+, Ds+, and D0 charmed mesons

https://doi.org/10.1016/S0370-2693(99)00902-8Get rights and content

Abstract

We report the results of a search for flavor-changing neutral current, lepton-flavor violating, and lepton-number violating decays of D+, Ds+, and D0 mesons (and their antiparticles) into modes containing muons and electrons. Using data from Fermilab charm hadroproduction experiment E791, we examine the πℓℓ and Kℓℓ decay modes of D+ and Ds+ and the ℓ+ decay modes of D0. No evidence for any of these decays is found. Therefore, we present branching-fraction upper limits at 90% confidence level for the 24 decay modes examined. Eight of these modes have no previously reported limits, and fourteen are reported with significant improvements over previously published results.

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Acknowledgements

We gratefully acknowledge the assistance of the staffs of Fermilab and of all the participating institutions. This research was supported by the Brazilian Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico, CONACyT (Mexico), the Israeli Academy of Sciences and Humanities, the US Department of Energy, the US-Israel Binational Science Foundation, and the US National Science Foundation. Fermilab is operated by the Universities Research Association, Inc., under contract with the US

References (10)

  • D. Bartlett

    Nucl. Instr. and Meth.

    (1987)
  • R.D. Cousins et al.

    Nucl. Instr. and Meth.

    (1992)
  • A.J. Schwartz, Mod. Phys. Lett. A8 (1993) 967; P. Singer, D.-X. Zhang, Phys. Rev. D 55 (1997)...
  • See for example: S. Pakvasa, hep-ph/9705397; S. Pakvasa, Chin. J. Phys. 32 (1994)...
  • C. Caso

    Eur. Phys. J. C

    (1998)
There are more references available in the full text version of this article.

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