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Photoproduction of Xi off nucleons

K. Nakayama·Yongseok Oh·H. Haberzettl
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Abstract

The photoproduction reaction $γN \to K K Ξ$ is investigated based on a relativistic meson-exchange model of hadronic interactions. The production amplitude is calculated in the tree-level approximation from relevant effective Lagrangians, whose (coupling constant) parameters are mostly fixed from the empirical data and/or quark models together with SU(3) symmetry considerations. Gauge invariance of the resulting amplitude is maintained by introducing the contact currents by extending the gauge-invariant approach of Haberzettl for one-meson photoproduction to two-meson photoproduction. The role of the intermediate low-lying hyperons and of the intermediate higher-mass hyperon resonances are analyzed in detail. In particular, the basic features of the production of $Ξ^-(1318)$ in $γp \to K^+ K^+ Ξ^-$ and their possible manifestations in the forthcoming experimental data are discussed.

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K. Nakayama, Yongseok Oh, H. Haberzettl. 2006-08-23. Photoproduction of Xi off nucleons. https://doi.org/10.1103/physrevc.74.035205

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