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

### Abstract

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

Topics: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: HAL CCSD
Year: 2004
OAI identifier: oai:HAL:in2p3-00025694v1
Provided by: HAL-Univ-Nantes
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