Why the Θ+ is seen in some experiments and not in others—a possible explanation

AbstractThe contradiction between evidence for and against the existence of the Θ+ pentaquark might be resolved if it only appears as a result of a particular production mechanism which is present in some experiments and absent in others. We examine the implications of Θ+ production via decay of a cryptoexotic N* resonance with a mass of about 2.4 GeV corresponding to a peak in the experimental data for the invariant mass of the (Θ+,K−) system. Further experimental checks are suggested