Search for ${{\boldsymbol A}^{0}}$ (Axion) Resonance in ${{\boldsymbol e}^{+}}$ ${{\boldsymbol e}^{-}}$ $\rightarrow$ ${{\boldsymbol \gamma}}{{\boldsymbol \gamma}}$
INSPIRE search
The limit is for $\Gamma\mathrm {( {{\mathit A}^{0}} \rightarrow {{\mathit e}^{+}} {{\mathit e}^{-}} )}\cdot{}\Gamma\mathrm {( {{\mathit A}^{0}} \rightarrow {{\mathit \gamma}} {{\mathit \gamma}} )}/\Gamma _{{\mathrm {total}}}$