Results of the searches for pentaquarks with strangeness in DIS at HERA

Details Results of the searches for pentaquarks with strangeness in DIS at HERA Results of the searches for pentaquarks with strangeness in DIS at HERA

2005-10-20

arxiv.org/abs/hep-ex/0510057v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 6 eps figures, Proceedings of the International Europhysics Conference on High-Energy Physics (July 21-27, 2005) Lisb

Scientific paper

The K0s-p invariant mass spectrum was reconstructed in several kinematic regions with the main emphasis on the studies of the production mechanism of the Theta+ candidate recently observed by ZEUS. The candidate Theta+ signal was found to be produced predominantly in the forward hemisphere in the laboratory frame. This is unlike the case for the Lambda(1520) or the Lambda(c), and indicates that the Theta+ may have an unusual production mechanism related to proton-remnant fragmentation. H1 does not observe a signal and sets an upper limit at 95% C.L. which does not exclude the ZEUS observation.

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