Search for the pentaquark candidate ${\Theta }^{+}$(1540) in the hyperon beam experiment WA89

Abstract

We report on a high-statistics search for the \t1540 resonance in ${\Sigma }^{-}$-nucleus collisions at 340 \gevc1 . No evidence for this resonance was found in our data sample which contains 13 millions $K_s^0\to {\pi }^{+}{\pi }^{-}$ decays above background. For the decay channel ${\Theta }^{+}\to K_s^{0}p$ and the kinematic range $x_F>$ 0.05 we find the production cross section to be $BR({\Theta }^{+}\to K_s^{0}p)\cdot {\sigma }_0<$ 1.8 $\mu$b per nucleon at 99% CL.

arXiv comment5 pages, 4 figures

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Cited by in corpus (7)

• Search for the ${\Theta }^{+}$ pentaquark in the reactions $\gamma p\to {\bar{K}}^0{K}^{+}n$ and $\gamma p\to {\bar{K}}^0{K}^{0}p$
• Present status on experimental search for pentaquarks
• Study of Inclusive Strange-Baryon Production and Search for Pentaquarks in Two-Photon Collisions at LEP
• Positive parity pentaquark towers in large Nc QCD
• Micro-canonical pentaquark production in $\ee$ annihilations
• Structure and decay width of Θ^+ in a one-gluon exchange model
• Observation of a resonance in the K${}_s$p decay channel at a mass of 1765 MeV/c${}^2$