Radiative Width of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math>Meson

The cross section for the phtotproduction of $\ensuremath{\eta}$ mesons by the Primakoff process has been measured at bremsstrahlung energies of 5.8, 9.0, and 11.45 GeV. A value of 0.324 \ifmmode\pm\else\textpm\fi{} 0.046 keV was obtained for the partial width of the $\ensuremath{\eta}$ meson decaying into photon pairs. This result is a factor of 3 lower than the previously accepted value.