Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction

Details Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction

2007-08-22

arxiv.org/abs/0708.2968v1

Phys.Lett.B659:107-112,2008

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 6 figures, submitted to Physics Letters B

Scientific paper

10.1016/j.physletb.2007.11.024

A search for tribaryon states was performed at KEK-PS. We adopted the $^4$He($K^-_{stopped}, p)$ reaction to populate the states with strangeness -1, charge 0 and isospin 1. No significant narrow structure was observed in the mass region from 3000 to 3200 MeV/c^2 in an inclusive missing mass spectrum. The upper limit of the formation branching ratio was determined to be ($1\sim3)\times 10^{-4}$, ($0.7\sim2)\times 10^{-3}$ and ($2\sim8) \times 10^{-3}$/($stopped K^{-}$) with 95 % confidence level for narrow states with an assumed width of 0, 20 and 40 MeV/c^2, respectively.

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