Search for narrow diphoton resonances and for $\gamma \gamma +W/Z$ signatures in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{}\hspace{0.5em}\mathrm{TeV}$

We present results of searches for diphoton resonances produced both inclusively and also in association with a vector boson $(W$ or $Z)$ using $100\hspace{0.5em}{\mathrm{pb}}^{-1}$ of $p\overline{p}$ collisions using the CDF detector. We set upper limits on the product of cross section times branching ratio for both $p\overline{p}\to \gamma \gamma +X$ and $p\overline{p}\to \gamma \gamma +W/Z.\mathrm{}$ Comparing the inclusive production to the expectations from heavy sgoldstinos we derive limits on the supersymmetry-breaking scale $\sqrt{F}$ in the TeV range, depending on the sgoldstino mass and the choice of other parameters. Also, using a NLO prediction for the associated production of a Higgs boson with a W or Z boson, we set an upper limit on the branching ratio for $\overrightarrow{H}\gamma \gamma .$ Finally, we set a lower limit on the mass of a “bosophilic” Higgs boson (e.g., one which couples only to $\gamma ,$ W, and Z bosons with standard model couplings) of $82\hspace{0.5em}\mathrm{GeV}{/c}^2$ at 95% confidence level.