Why pentaquarks are seen in some experiments and not in others
classification
✦ hep-ph
keywords
experimentsothersseensomeapproxbeenbeforebeginning
read the original abstract
The $\Theta^+$ Pentaquark is a Very narrow $\Gamma \approx 1$ 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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