Search for Exotic Baryons in 800 GeV pp (rtarrow) pXiPiX

We report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to $Xi^-pi^-$, $Xi^-pi^+$, $bar{Xi}^+pi^-$, and $bar{Xi}^+pi^+$. The only resonances observed are the well known $Xi^0(1530)$ and $bar{Xi^0}(1530)$. No evidence is found for a state near 1862 MeV, previously reported by NA49cite{NA49}. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with $sigma=7.6$ MeV in the $Xi^-pi^-$ effective mass spectrum to be 0.3% of the number of observed $Xi^0(1530)toXi^-pi^+$. We find similarly restrictive upper limits for an enhancement at 1862 MeV in the $Xi^-pi^+$, $bar{Xi}^+pi^-$, and $bar{Xi}^+pi^+$ mass spectra.