Search for the pentaquark candidate $Θ^+$(1540) in the hyperon beam experiment WA89

Details Search for the pentaquark candidate $Θ^+$(1540) in the hyperon beam experiment WA89 Search for the pentaquark candidate $Θ^+$(1540) in the hyperon beam experiment WA89

2005-10-05

arxiv.org/abs/hep-ex/0510013v1

Phys.Rev.C72:055201,2005

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 4 figures

Scientific paper

10.1103/PhysRevC.72.055201

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^0_s \to \pi^+\pi^- $ decays above background. For the decay channel $\Theta^+ \to K^0_s p$ and the kinematic range $x_F>$ 0.05 we find the production cross section to be $BR(\Theta^+ \to K^0_s p)\cdot \sigma_0 <$ 1.8 $\mu$b per nucleon at 99% CL.

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