The exclusive gamma missing-E(t) signal has a small standard
model cross-section and is thus a good channel in which to look for signs of
new physics. This signature is predicted by models with a superlight
gravitino or with large extra spatial dimensions. We search for such signals
at the CDF detector at the Tevatron, using 87 pb-1 of data at s**(1/2) = 1.8
TeV, and extract 95% C.L. limits on these processes. A limit of 221 GeV is
set on the scale |F|1/2 in supersymmetry models. For 4, 6, and 8 extra
dimensions, limits on the fundamental mass scale M_D of 549, 581, and 602
GeV, respectively, are found. We also specify a 'pseudo-model-independent'
method of comparing the results to theoretical predictions.
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Updated: Tuesday, 2003 January 07 11:04:56 CST automatically from input from "Carol I. Picciolo"