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A new upper limit for the branching ratio for the decay η → π0e+e− |
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| Authors: | M.R. Jane P. Grannis B.D. Jones N.H. Lipman D.P. Owen V.Z. Peterson W.T. Toner E.H. Bellamy M.G. Green J. Kirkby C.M. Solomonides J.A. Strong D.H. Thomas |
| Affiliation: | 1. Rutherford Laboratory, Chilton, Oxfordshire, U.K.;2. Westfield College, London, U.K. |
| Abstract: | We have looked for the decay η → π0e+e? in an optical spark chamber experiment at the Rutherford Laboratory. Our observations are consistent with no events being seen and give an upper limit rate (η → π0e+e?)/ rate (η → all) < 4.5 × 10?5 (90% C.L.). |
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