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Evidence for the Strangeness S=+1 Pentaquark from LEPS and CLAS Experiments

K. H. Hicks
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Abstract

There are now several experimental collaborations that have seen evidence for a narrow state in the mass spectrum of the ($nK^+$) system. Two of these experiments, from the LEPS collaboration in Japan and the CLAS collaboration in the USA, are described briefly. Both use similar photoproduction reactions with a $K^+K^-$ pair in the final state. In addition, data from the CLAS collaboration for the $γp \to K_s K^+ n$ reaction are presented for the first time, which has no prominant peak in the ($nK^+$) mass spectrum when the $K_s$ angle is limited to forward angles.

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K. H. Hicks. 2005-04-15. Evidence for the Strangeness S=+1 Pentaquark from LEPS and CLAS Experiments. https://doi.org/10.1063/1.1799739

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