@article{169d2897180048dab9fab877d25b32a8,
title = "Search for rare and forbidden η′ decays",
abstract = "We have searched for rare and forbidden decays of the η′ meson in hadronic events at the CLEO II detector. The search is conducted on 4.80 fb−1 of e+e− collisions at 10.6 GeV center-of-mass energy at the Cornell Electron Storage Ring. We find no signals and set 90% confidence level upper limits of their branching fractions: B(η′→e+e−η)<2.4×10−3, B(η′→e+e−π0)<1.4×10−3, B(η′→e+e−γ)<0.9×10−3, and B(η′→eμ)<4.7×10−4. We also fit the matrix element of the η′→π+π−η Dalitz plot with the parametrization |M|2=A|1+αy|2, where y is a linear function of the kinetic energy of the ηand find Re (α)=−0.021±0.025.",
author = "{CLEO Collaboration} and Briere, {R. A.} and Behrens, {B. H.} and Ford, {W. T.} and A. Gritsan and H. Krieg and J. Roy and Smith, {J. G.} and Alexander, {J. P.} and R. Baker and C. Bebek and Berger, {B. E.} and K. Berkelman and F. Blanc and V. Boisvert and Cassel, {D. G.} and M. Dickson and {von Dombrowski}, S. and Drell, {P. S.} and Ecklund, {K. M.} and R. Ehrlich and Foland, {A. D.} and P. Gaidarev and Galik, {R. S.} and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hopman, {P. I.} and Jones, {C. D.} and Kreinick, {D. L.} and T. Lee and Y. Liu and Meyer, {T. O.} and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and Patterson, {J. R.} and D. Peterson and D. Riley and Thayer, {J. G.} and Thies, {P. G.} and B. Valant-Spaight and A. Warburton and P. Avery and M. Lohner and C. Prescott and Rubiera, {A. I.} and J. Yelton and H. Yamamoto",
year = "2000",
doi = "10.1103/PhysRevLett.84.26",
language = "English",
volume = "84",
pages = "26--30",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "1",
}