Search for Diphoton Events with Large Missing Transverse Energy in pp¯ Collisions at =1.8TeV

Le résumé fourni par la source

A search for new physics has been carried out in the channel $p\overline{p}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}+{E}_{T}$, as expected in various supersymmetric models. We require two photons with transverse energy ${E}_{T}^{\ensuremath{\gamma}}>12\mathrm{GeV}$ and pseudorapidity $|{\ensuremath{\eta}}^{\ensuremath{\gamma}}|<1.1$. The distribution of missing transverse energy ( ${E}_{T}$) is consistent with background and no events have ${E}_{T}>25\mathrm{GeV}$. We set limits on production cross sections for selectron, sneutrino, and neutralino pairs, decaying into photons, which range from about 400 fb to 1 pb depending on the sparticle masses. A general limit of 185 fb (95% C.L.) is set on $\ensuremath{\sigma}(p\overline{p}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}{E}_{T}+X)$, where ${E}_{T}^{\ensuremath{\gamma}}>12\mathrm{GeV}$, $|{\ensuremath{\eta}}^{\ensuremath{\gamma}}|<1.1$, and ${E}_{T}>25\mathrm{GeV}$.

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