Elsevier

Nuclear Physics A

Volume 914, 20 September 2013, Pages 91-96
Nuclear Physics A

Search for the Θ+ pentaquark at J-PARC

https://doi.org/10.1016/j.nuclphysa.2013.01.010Get rights and content

Abstract

We have been searching for the Θ+ pentaquark via the πpKX reaction at the J-PARC hadron facility. No peak structure was observed in the missing mass spectrum obtained at 1.92GeV/c beam momentum. The upper limit for the production cross section averaged over the scattering angle from 2° to 15° in the laboratory frame was derived to be 0.26μb/sr. In order to make a more stringent constraint we have also performed a measurement at 2.0GeV/c. Present analysis status of this new data is reported.

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