Testing the nature of the $\Lambda$(1520) in the $J/\psi \to \bar{\Lambda }{K}^{-}p$ and $J/\psi \to \bar{\Lambda }{\pi }^{+}{\pi }^{-}\Lambda$ reactions

Abstract

We study the reactions $J/\psi \to \bar{\Lambda }{K}^{-}p$ and $J/\psi \to \bar{\Lambda }{\pi }^{+}{\pi }^{-}\Lambda$ with a unitary chiral approach. We predict the ratio of the invariant mass distributions of these two reactions at the $\Lambda (1520)$ peak position, which is free of the unknown production mechanism and reflects only the properties of the $\Lambda (1520)$. An experimental measurement of this ratio will provide the couplings of the $\Lambda (1520)$ to its decay channels, allowing to test the predictions of the chiral unitary approach on this resonance, which appears as dynamically generated in that approach.

arXiv comment7 pages, 6 figures, version to appear in EPJA

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Cited by in corpus (3)

• The $K^{-}p\to {\Sigma }^0{\pi }^0$ reaction at low energies in a chiral quark model
• Properties of the Lambda(1520) Resonance from High-Precision Electroproduction Data
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances