Why pentaquarks are seen in some experiments and not in others

Details Why pentaquarks are seen in some experiments and not in others Why pentaquarks are seen in some experiments and not in others

2005-01-23

arxiv.org/abs/hep-ph/0501209v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages

Scientific paper

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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