Upper Limits for the Production of Light Short-Lived Neutral Particles in Radiative $ϒ$ decay

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23 June 1986

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 56 (25) , 2676-2679
https://doi.org/10.1103/physrevlett.56.2676

Abstract

We have searched for the exclusive decay of the

ϒ (1 S)

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 (ϒ (1 S) \to γ a) B (a \to e^{+} e^{-})

are established for a range of masses,

2 m_{e} < m_{a} < 2 m_{μ}

.

Keywords

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