Abstract
We report the first search for the \$J^PC=0^--\$ glueball in \$\Upsilon(1S)\$
and \$\Upsilon(2S)\$ decays with data samples of \$(102\pm2)\$ million and
\$(158\pm4)\$ million events, respectively, collected with the Belle detector. No
significant signals are observed in any of the proposed production modes, and
the 90\% credibility level upper limits on their branching fractions in
\$\Upsilon(1S)\$ and \$\Upsilon(2S)\$ decays are obtained. The inclusive branching
fractions of the \$\Upsilon(1S)\$ and \$\Upsilon(2S)\$ decays into final states
with a \$\chi\_c1\$ are measured to be \$\BR(\Upsilon(1S)\chi\_c1+ anything)
= (1.900.43(stat.)0.14(syst.))10^-4\$ with an improved
precision over prior measurements and \$\BR(\Upsilon(2S)\chi\_c1+ anything)
= (2.240.44(stat.)0.20(syst.))10^-4\$ for the first time.
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