News FocusHigh-Energy Physics

Rara Avis or Statistical Mirage? Pentaquark Remains at Large

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Science  19 Nov 2004:
Vol. 306, Issue 5700, pp. 1281-1282
DOI: 10.1126/science.306.5700.1281

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Two years after its surprise appearance in debris from a nuclear collision, some researchers suspect an exotic particle may be a will-o'-the-wisp.