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Phys. Rev. D 62, 052004 (2000) [11 pages]

Search for antiproton decay at the Fermilab Antiproton Accumulator

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S. Geer, J. Marriner, M. Martens, R. E. Ray, J. Streets, and W. Wester
Fermi National Accelerator Laboratory, Batavia, Illinois 60510

M. Hu and G. R. Snow
University of Nebraska, Lincoln, Nebraska 68588

T. Armstrong
Pennsylvania State University, University Park, Pennsylvania 16802

C. Buchanan, B. Corbin, M. Lindgren, and T. Muller*
University of California at Los Angeles, Los Angeles, California 90024

R. Gustafson
University of Michigan, Ann Arbor, Michigan 48109

(The APEX Collaboration)

Received 10 August 1999; published 9 August 2000

A search for antiproton decay has been made at the Fermilab Antiproton Accumulator. Limits are placed on 13 antiproton decay modes. The results include the first explicit experimental limits on the muonic decay modes of the antiproton, and the first limits on the decay modes e-γγ and e-ω. The most stringent limit is for the decay mode p̅ →e-γ. At 90% C.L. we find that τp̅ /B(p̅ →e-γ)>7×105 yr. The most stringent limit for decay modes with a muon in the final state is for the decay p̅ →μ-γ. At 90% C.L. we find that τp̅ /B(p̅ →μ-γ)>5×104 yr.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.62.052004
DOI:
10.1103/PhysRevD.62.052004
PACS:
13.30.Ce, 11.30.Er, 11.30.Fs, 14.20.Dh

*Present address: Universität Karlsruhe, 76128 Karlsruhe, Germany.

 
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