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Testing the nature of the $Λ(1520)$ resonance through photoproduction

L. Roca·E. Oset·H. Toki
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Abstract

Recent studies within the framework of chiral unitary theory produce the $Λ(1520)$ resonance, among several others, as a dynamically generated resonance from the interaction of the baryon decuplet and the meson octet. The $Λ(1520)$ qualifies as a quasibound state of $πΣ(1385)$ and this has repercussion in some observable quantities. In the present work we show that the $γp\to K^+K^-p$ reaction has a sizeable cross section for invariant $K^-p$ masses above the $Λ(1520)$ mass. On the other hand, we also find that the $γp\to K^+πΣ(1385)$ reaction has a sizeable cross section in that energy region as a consequence of the strong coupling of the $Λ(1520)$ to $πΣ(1385)$, and then we make predictions for the ratio of this cross section to that of the $γp\to K^+ K^-p $ reaction.

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L. Roca, E. Oset, H. Toki. 2004-11-11. Testing the nature of the $Λ(1520)$ resonance through photoproduction. https://arxiv.org/abs/hep-ph/0411155

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