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The possibility of the existence of multiquark hadrons made of 4-quark formesons and 5-quark for baryons was predicted by Gell-Mann in Ref. [1]. Therenewed interest for the search of exotic pentaquark states was initiated bythe paper by Diakonov, Petrov, and Polyakov in Ref. [2]. The 2003 experimentalreports on the observation of {\Theta^+} pentaquark with a uudd{\bar s} quarkcontent created a big excitement and many following experiments have reportedits observation [3]. After high-statistics experiments at JLab, which did notconfirm previous claims by the CLAS collaboration, the community concluded thatthe {\Theta^+} pentaquark either does not exist at all or has an extremelysmall cross section, making it currently unobserved. There were differentreview papers on this subject, either questioning the existence of the{\Theta^+} or attempting to explain the reasons why reaching a conclusion basedon production experiments is challenging [4]. To address the challenge ofminimal 3-body final states, a formation experiment with a projectile kaon beamis proposed. Below, we discuss how the {\Theta^+} could be observed in the KLp\to {\Theta^+} \to {K^+}n reaction in the KLF experiment at JLab [5].

Search for {\Theta^+} in KLp \to K+n reaction in KLF at JLab