Evidence forη0andω0Meson Production in the Reactionp+d→He3+MissingMass

Abstract

Strong ${\pi }^0$, ${\eta }^0$, and ${\omega }^0$ peaks have been observed in the reaction $p+d\to {\mathrm{He}}^3+\mathrm{missing}\mathrm{mass}$ at incident proton momenta of 3.5-3.8 GeV/c and proton-to-meson momentum transfer $t=-1.5\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$. The mesons are produced with center-of-mass cross sections on the order of ${10}^{-34\mathrm{}}$ ${\mathrm{cm}}^2$/sr at a center-of-mass angle of about 60°. The missing-mass spectrometer combined the "Jacobian peak" and the orthogonal dispersion techniques.