The E760 Collaboration has studied the reaction p¯p→${\mathrm{\chi }}_2$→γγ using a hydrogen gas jet target in the Fermilab antiproton acumulator ring. The following values are obtained for the branching ratio and partial width to two photons; B(${\mathrm{\chi }}_2$→γγ)=(1.60±0.45)×${10}^{\mathrm{-}4}$ and Γ(${\mathrm{\chi }}_2$→γγ)=321±95 eV.

• Received 2 October 1992

DOI:https://doi.org/10.1103/PhysRevLett.70.2988