The PHENIX experiment at RHIC should be sensitive to decays of the anti-pentaquark via the channel. Charged kaons can be identified using the standard tracking and time of flight up to a momentum of 1.5 GeV/ c . Anti-neutron candidates are detected via their annihilation signal in the highly segmented electromagnetic calorimeter (EMCal). In order to assess the quality of the anti-neutron identification, we reconstruct the . As an additional cross-check, the invariant mass of is reconstructed where no resonance in the pentaquark mass range is expected. At present, no enhancement at the expected pentaquark mass is observed in dAu collisions at .
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C. Pinkenburg (2004) studied this question.