Unitary coupled channel analysis of the $Λ(1520)$ resonance

Details Unitary coupled channel analysis of the $Λ(1520)$ resonance Unitary coupled channel analysis of the $Λ(1520)$ resonance

2006-03-27

arxiv.org/abs/hep-ph/0603222v1

Phys.Rev.C73:045208,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 9 figures

Scientific paper

10.1103/PhysRevC.73.045208

We study the $\Lambda(1520)$ resonance in a coupled channel approach involving the $\pi\Sigma(1385)$, $K\Xi(1530)$, $\bar{K}N$ and $\pi\Sigma$ channels. Implementing unitarity in coupled channels, we make an analysis of the relative importance of the different mechanisms which contribute to the dynamical structure of this resonance. From experimental information on some partial wave amplitudes and constraints imposed by unitarity, we get a comprehensive description of the amplitudes and hence the couplings to the different channels. We test these amplitudes in different reactions like $K^-p\to\Lambda\pi\pi$, $\gamma p\to K^+K^-p$, $\gamma p\to K^+\pi^0\pi^0\Lambda$ and $\pi^- p\to K^0 K^-p$ and find a fair agreement with the experimental data.

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