A search for exclusive decays of B-d(0) and B-s(0) mesons has been pre
formed in the channels B-d(0) --> J eta, B-s(0) --> J eta, B-d(0) -->
J(pi)(0) and B-s(0) --> J(pi)(0). The data smaple consisted of more th
an three and a half million hadronic Z decays collected by the L3 expe
riment at LEP from 1991 through 1995. No candidate events have been ob
served for any of the modes thus determining upper limits at 90% confi
dence level: 3.2 x 10(-4) on Br(B-d(0) --> J(pi)(0)) and the first exp
erimental limits: Br(B-d(0) --> J eta) < 1.2 x 10(-3), Br(B-s(0) --> J
eta) < 3.8 x 10(-3), Br(B-s(0) --> J pi(0)) < 1.2 x 10(-3).