A Search for Short Lived Axions in an Electron Beam Dump Experiment

Riordan, E. M.

doi:10.1103/PhysRevLett.59.755

A Search for Short Lived Axions in an Electron Beam Dump Experiment

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.59.755· OSTI ID:1892287

Riordan, E. M.

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 fu¨r Schwerionenforschung are not due to an elementary pseudoscalar.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1892287

Report Number(s):: SLAC-PUB-4280; UR-993; FERMILAB-PUB-87-251; oai:inspirehep.net:245798

Journal Information:: Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 59

Country of Publication:: United States

Language:: English

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