Upper limits for the photoproduction cross section for the Phi--(1860) pentaquark state off the deuteron

Details Upper limits for the photoproduction cross section for the Phi--(1860) pentaquark state off the deuteron Upper limits for the photoproduction cross section for the Phi--(1860) pentaquark state off the deuteron

2011-09-06

arxiv.org/abs/1109.1238v2

Physical Review C85, 015205 (2012)

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

We searched for the Phi--(1860) pentaquark in the photoproduction process off the deuteron in the Xi- pi- decay channel using CLAS. The invariant mass spectrum of the Xi- pi- system does not indicate any statistically significant enhancement near the reported mass M = 1.860 GeV. The statistical analysis of the sideband-subtracted mass spectrum yields a 90% confidence level upper limit of 0.7 nb for the photoproduction cross section of Phi--(1860) with a consecutive decay into Xi- pi- in the photon energy range 4.5 GeV < Egamma < 5.5 GeV.

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