Search for theta+(1540) in the Reaction K+ p -> K+ n pi+ at 11 GeV/c

We have studied the reaction K + p ! K + n� + using an 11 GeV/c K + beam and the Large Acceptance Superconducting Solenoid (LASS) multiparticle spectrometer facility at SLAC. We put limits on the production of narrow � + baryons in this reaction.