CaltechAUTHORS
Published August 17, 1987 | Version Published
Journal Article Open

Search for short-lived axions in an electron-beam-dump experiment

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Abstract

We report results of an electron-beam-dump search for neutral particles with masses in the range 1 to 15 MeV and lifetimes τ between 10^-14 and 10^-10 s. No evidence was found for such an object. We fule out the existence of any 1.8-MeV pseudoscalar boson with τ>8.2×10^-15 s and an absorption cross section in matter less than 1 mb per nucleon, and exclude τ>1×10^-14 s were its cross section to equal 50 mb per nucleon. In conjunction with measurements of the electron's anomalous magnetic moment, this experiment shows that the narrow positron peaks observed in heavy-ion collisions at the Gessellschaft für Schwerionenforschung are not due to an elementary pseudoscalar.

Additional Information

© 1987 The American Physical Society. Received 4 May 1987. We thank G. Davis, R. Eisele, C. Hudspeth, L. Keller, and D. Walz for their aid in the setup and running of this experiment. The support of B. Richter and the SLAC staff were crucial to its success. We also acknowledge valuable discussions with S. Brodsky, M. Karliner, L. Krauss, B. Lu, and Y.S. Tsai. This research was supported by Department of Energy Contracts No. ER13065-453, No. DE-AC02-76ER02853, and No. DE-AC03-76SF00515; and National Science Foundation Contracts No. PHY84-10549 and No. PHY85-05682.

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Identifiers

Eprint ID
10135
Resolver ID
CaltechAUTHORS:RIOprl87

Funding

Department of Energy (DOE)
ER13065-453
Department of Energy (DOE)
DE-AC02-76ER02853
Department of Energy (DOE)
DE-AC03-76SF00515
NSF
PHY84-10549

Dates

Created
2008-04-15
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Updated
2021-11-08
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