Published August 17, 1987
| Published
Journal Article
Open
Search for short-lived axions in an electron-beam-dump experiment
- Creators
- Riordan, E. M.
- Krasny, M. W.
- Lang, K.
- de Barbaro, P.
- Bodek, A.
- Dasu, S.
- Varelas, N.
- Wang, X.
- Arnold, R.
- Benton, D.
- Bosted, P.
- Clogher, L.
- Lung, A.
- Rock, S.
- Szalata, Z.
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Filippone, B. W.
- Walker, R. C.
- Bjorken, J. D.
- Crisler, M.
- Para, A.
- Lambert, J.
- Button-Shafer, J.
- Debebe, B.
- Frodyma, M.
- Hicks, R. S.
- Peterson, G. A.
- Gearhart, R.
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.Attached Files
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Additional details
- Eprint ID
- 10135
- Resolver ID
- CaltechAUTHORS:RIOprl87
- ER13065-453
- Department of Energy (DOE)
- DE-AC02-76ER02853
- Department of Energy (DOE)
- DE-AC03-76SF00515
- Department of Energy (DOE)
- PHY84-10549
- NSF
- Created
-
2008-04-15Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field