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) |
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Pages (from-to) | 2676-2679 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 56 |
Issue number | 25 |
DOIs | |
State | Published - 1986 |