Search for the decay B0→pp¯

We present the result of a search for the charmless two-body baryonic decay B0→pp̅ in a sample of 88 million Υ(4S)→BB̅ decays collected by the BABAR detector at the SLAC PEP-II asymmetric-energy B Factory. We use Cherenkov radiation to identify protons cleanly, and determine the signal yield with a maximum-likelihood fit technique using kinematic and topological information. We find no evidence for a signal and place a 90% confidence-level upper limit of B(B0→pp̅ )<2.7×10-7.