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Why pentaquarks are seen in some experiments and not in others

Harry J. Lipkin
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Abstract

The $Θ^+$ Pentaquark is a Very narrow $Γ\approx 1$ MeV KN Resonance. Why do some experiments see it and others do not? The lowest quark configuration that can describe it is exotic $uudd \bar s$. Why have no exotics been seen before? Is this the beginning of a new spectroscopy? Can it help toteach us about How QCD makes hadrons from quarks and gluons?

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Harry J. Lipkin. 2005-01-23. Why pentaquarks are seen in some experiments and not in others. https://doi.org/10.1142/9789812702227_0205

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