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04 July 2020
 
  » arxiv » hep-ex/0304040

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Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
V.V. Barmin ; V.S. Borisov ; G.V. Davidenko ; A.G. Dolgolenko ; C. Guaraldo ; I.F. Larin ; V.A. Matveev ; C. Petrascu ; V.A. Shebanov ; N.N. Shishov ; L.I. Sokolov ; G.K. Tumanov ;
Date 30 Apr 2003
Journal Phys.Atom.Nucl. 66 (2003) 1715-1718; Yad.Fiz. 66 (2003) 1763-1766
Subject hep-ex
AbstractThe status of our investigation of low-energy $K^+$Xe collisions in the Xenon bubble chamber DIANA is reported. In the charge-exchange reaction $K^+Xe o K^0 p Xe’$ the spectrum of $K^0 p$ effective mass shows a resonant enhancement with $M = 1539 pm 2$ MeV/c$^2$ and $Gamma le 9 MeV/c$^2$. The statistical significance of the enhancement is near $4.4sigma$. The mass and width of the observed resonance are consistent with expectations for the lightest member of the anti-decuplet of exotic pentaquark baryons, as predicted in the framework of the chiral soliton model.
Source arXiv, hep-ex/0304040
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