Search for narrow diphoton resonances and for \u3ci\u3eγγ+W/Z\u3c/i\u3e signatures in \u3ci\u3epp̅\u3c/i\u3e collisions at √s=1.8 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 pb-1 of pp̅ collisions using the CDF detector. We set upper limits on the product of cross section times branching ratio for both pp̅→ γγ+X and pp̅→ γγ+ W/Z. Comparing the inclusive production to the expectations from heavy sgoldstinos we derive limits on the supersymmetrybreaking scale √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 H→ γγ. Finally, we set a lower limit on the mass of a ‘‘bosophilic’’ Higgs boson (e.g., one which couples only to γ, W, and Z bosons with standard model couplings! of 82 GeV/c2 at 95% confidence level