Review of the experimental evidence on pentaquarks and critical discussion

Details Review of the experimental evidence on pentaquarks and critical discussion Review of the experimental evidence on pentaquarks and critical discussion

2005-03-10

arxiv.org/abs/hep-ex/0503020v1

Physics

High Energy Physics

High Energy Physics - Experiment

Contribution to the International Conference on 'Quark Confinement and the Hadron Spectrum VI 2004', Tanka Village, 21-25 Sept

Scientific paper

10.1063/1.1920947

We review and discuss the experimental evidence on predicted baryonic states made by 4 quarks and one antiquark, called pentaquarks. Theoretical and experimental advances in the last few years led to the observation of pentaquark candidates by some experiments, however with relatively low individual significance. Other experiments did not observed those candidates. Furthermore, the masses of the $\theta^+$(1540) candidates exhibit a large variation in different measurements. We discuss to which extend these contradicting informations may lead to a consistent picture.

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