Search for baryons in the radiative penguin decay b -> s gamma
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We have searched for the baryon-containing radiative penguin decays B -p and B- 0-p, using a sample of 9.7 106 BB events collected at the Y(45) with the CLEO detector. We find no evidence for either, and set 90% confidence level upper limits of B(B -p) + 0.3B(B -0-p)]E >2.0 GeV<3.310-6, [B(B- 0-p) + 0-4B(B-p)] E>2.0Gev<6.4106. From the latter, we estimate B(B Xsy,Xs containing baryons) E>2.0 GeV<3.810-5. This limit implies upper limits on corrections to CLEO's recent measurement of branching fraction, mean photon energy, and variance in photon energy from bs that are less than half the combined statistical and systematic errors quoted on these quantities. 2003 The American Physical Society.