Erratum: Upper limit for axion production in radiative Upsilon decay

We have used the Columbia University--Stony Brook detector at the Cornell Electron Storage Ring to study the decays of UPSILON(1S) and UPSILON(3S) resonances into a single photon plus a long-lived noninteracting particle. We obtain an upper limit on the branching ratio for UPSILON(1S)..--> gamma..+X, where X is undetected. This upper limit is 3.5 x 10/sup -4/ (90% C.L.) for masses m/sub X/ less than 7 GeV. For the UPSILON(3S) the upper limit is 1.2 x 10/sup -4/ (90% C.L.) for masses less than 4 GeV. Also, the product of the branching ratios of UPSILON..--> gamma..+axion and J/psi..--> gamma..+axion is calculated to be 0.6 x 10/sup -9/, inconsistent with theoretical predictions.