Are there S=-2 Pentaquarks?

Details Are there S=-2 Pentaquarks? Are there S=-2 Pentaquarks?

2004-01-12

arxiv.org/abs/hep-ex/0401014v1

Eur.Phys.J.C37:133-140,2004

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1140/epjc/s2004-01969-y

Recent evidence for pentaquark baryons in the channels $\Xi^-\pi^-$, $\Xi^-\pi^+$ and their anti-particles claimed by the NA49 collaboration is critically confronted with the vast amount of existing data on $\Xi$ spectroscopy which was accumulated over the past decades. It is shown that the claim is at least partially inconsistent with these data. In addition two further exotic channels of the pentaquark type available in the NA49 data are investigated. It is argued that this study leads to internal inconsistency with the purported signals.

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