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

Egiyan, H.; Langheinrich, J.; Gothe, R. W.; Graham, L.; Holtrop, M.; Lu, H.; Mattione, P.; Mutchler, G.; Park, K.; Smith, E. S.

doi:10.1103/PhysRevC.85.015205

arXiv 2011-09-06 DOI 10.1103/PhysRevC.85.015205 0 مشاهدة

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

Egiyan, H. · Langheinrich, J. · Gothe, R. W. · Graham, L. · Holtrop, M. · Lu, H. · Mattione, P. · Mutchler, G. · Park, K. · Smith, E. S. · Stepanyan, S. · Zhao, Z. W. · Collaboration, CLAS

Nuclear Experiment

الأصل · EN

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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