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arXiv · hep-ph/0511198

Photo-excitation of hyperons and exotic baryon in gamma N --> K Anti-K N

Yongseok Oh·K. Nakayama·T. -S. H. Lee
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Abstract

We investigate the reaction of $γN \to K \bar{K} N$ focusing on the photoproduction of $Λ(1520)$ and putative exotic $Θ(1540)$. We consider various background production mechanisms including the production of vector mesons, tensor mesons, and other $Λ$ and $Σ$ hyperons. We discuss the angular distribution of $Λ(1520)$ photoproduction cross section and the radiative decays of $Λ(1520)$. We also discuss what we expect for the invariant mass distributions if the $Θ(1540)$ is formed in the reaction, with the parameters studied so far. We find that the peak in the $KN$ invariant mass distribution, if confirmed, can hardly come from the kinematic reflections, especially, due to the tensor meson backgrounds.

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Yongseok Oh, K. Nakayama, T. -S. H. Lee. 2005-11-17. Photo-excitation of hyperons and exotic baryon in gamma N --> K Anti-K N. https://doi.org/10.1142/9789812773333_0051

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