Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark

Details Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark

2006-10-18

arxiv.org/abs/nucl-ex/0610026v2

J.Phys.G34:627,2007

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 7 figures; text changed, references added, style file changed

Scientific paper

10.1088/0954-3899/34/4/002

The reaction pp->p K0 pi+ Lambda has been studied with the ANKE spectrometer at COSY-Juelich at a beam momentum of 3.65 GeV/c in order to search for a possible signal of the pentaquark Theta+(1540), decaying into the p K0 system. By detecting four charged particles in the final state, the K0 and the Lambda have been reconstructed to tag strangeness production. It has been found that the pi+ Lambda missing-mass spectrum displays no significant signal expected from the Theta+(1540) excitation. The total cross section for the reaction pp->p K0 pi+ Lambda has been deduced, as well as an upper limit for the Theta+ production cross section. The intermediate Delta++ K0 Lambda state is found to provide a significant contribution to the reaction.

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