A search for B to K nu nu-bar
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P.D. Jackson, University of Victoria 

We present results of search for the rare decay B to K nu nu-bar with
the BaBar detector at the SLAC B factory.  This is a theoretically
clean flavour changing neutral current decay which proceeds in the
Standard Model through loop and box diagrams and which is potentially
sensitive to contributions from heavy virtual particles internal to
these loops.  In this analysis we search for a high momentum signal
track and significant missing energy recoiling against a charged B
which is exclusively reconstructed either hadronically or
semileptonically.  A 90% confidence limit is quoted based on analyses
of a sample of approximately 88 Million Upsilon (4S) decays