Abstract
We have searched for the exclusive decay of the '(1S) into a photon and a short-lived spin-0 particle, a, decaying into e+e-, using the CLEO detector at the Cornell Electron Storage Ring. Upper limits for the product branching ratio B('(1S)'a)B(a'e+e-) are established for a range of masses, 2me<ma<2m.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2676-2679 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 56 |
| Issue number | 25 |
| DOIs | |
| State | Published - 1986 |
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