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Published December 21, 1964 | public
Journal Article Open

Experimental Restrictions on Ne'eman's Fifth Interaction


Recently, Ne'eman has proposed a "fifth interaction" between the strangeness current and a neutral vector meson χ, for the purpose of breaking SU(3) symmetry. We show that a χ mass less than 2mπ would be inconsistent with a variety of experiments, including K-mesonic atoms, the long-range pp potential, K1 regeneration from a K2 beam, the Lamb shift, modern refinements of the Cavendish "ice-bucket" experiment, and the absence of π0→γ+χ and χ→e++e-. The remaining possibility, that mχ exceeds 2mπ, is discussed briefly.

Additional Information

©1964 The American Physical Society. Received 4 August 1964. We would like to thank W. Chinowsky, H. Kobrak, Y. Ne'eman, J. van Putten, and W. Wagner for very helpful discussions. Work supported in part by the U.S. Atomic Energy Commission.


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