The f1(1285) meson is produced in e+e- collisions and decays to eta pi0 pi0, giving a branching fraction B(f1->e+e-) = (8.3 +- 2.3 +- 1.1)e-9.
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Evidence of the $e^+ e^-\to f_1(1285)$ reaction with the CMD-3 detector at VEPP-2000
The f1(1285) meson is produced in e+e- collisions and decays to eta pi0 pi0, giving a branching fraction B(f1->e+e-) = (8.3 +- 2.3 +- 1.1)e-9.