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Production of the pentaquark $Θ^+$ in $np$ scattering

S. I. Nam·A. Hosaka·H. -Ch. Kim
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Abstract

We study $np\to ΛΘ^{+}$ and $np\to Σ^{0}Θ^{+}$ processes for both of the positive and negative parities of the $Θ^{+}$. Employing the effective chiral Lagrangians for the $KNY$ and $K^*NY$ interactions, we calculate differential cross sections as well as total cross sections for the $np\to Σ^0 Θ^+$ and $np\to ΛΘ^+$ reactions. The total cross sections for the positive-parity $Θ^+$ turn out to be approximately ten times larger than those for the negative parity $Θ^+$ in the range of the CM energy $\sqrt{s}_{\rm th}\le \sqrt{s}\le 3.5 {\rm GeV}$. The results are rather sensitive to the mechanism of $K$ exchanges in the $t$ -- channel.

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S. I. Nam, A. Hosaka, H. -Ch. Kim. 2004-03-01. Production of the pentaquark $Θ^+$ in $np$ scattering. https://doi.org/10.1103/physrevd.70.114027

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