A New Upper Limit on the Decay $\eta\to e^{+}e^{-}$

CLEO Collaboration; T. Browder et al

doi:10.1103/PhysRevD.56.5359

A New Upper Limit on the Decay $\eta\to e^{+}e^{-}$

高能物理 - 实验 2010-04-08 v1

作者: CLEO Collaboration , T. Browder et al

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摘要

We have searched for the rare decay of the eta meson $\eta \to e^{+}e^{-}$ using the CLEO II detector. The $\eta$ 's were produced in $e^{+}e^{-}$ collisions with 10 GeV center-of-mass energy at the Cornell Electron Storage Ring (CESR). We find with 90% confidence the upper limit on the branching fraction $B(\eta \to e^{+}e^{-}) < 7.7\times 10^{-5}$ . The application of conventional elementary particle theory to this decay predicts a branching fraction of about $10^{-9}$ .

关键词

leptonic and radiative decays hadron decays branching fraction

引用

@article{arxiv.hep-ex/9706005,
  title  = {A New Upper Limit on the Decay $\eta\to e^{+}e^{-}$},
  author = {CLEO Collaboration and T. Browder et al},
  journal= {arXiv preprint arXiv:hep-ex/9706005},
  year   = {2010}
}

备注

14 page postscript file also available through http://w4.lns.cornell.edu/public/CLNS, submitted to Physical Review D

A New Upper Limit on the Decay $\eta\to e^{+}e^{-}$

摘要

关键词

引用

备注

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