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arXiv · 1212.4936

Mechanism of $K^- p \to \eta\Lambda$ reaction near threshold

Bo-Chao Liu·Ju-Jun Xie
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Abstract

Within an effective Lagrangian approach, we investigate the reaction mechanism of $K^- p\to \eta\Lambda$ near threshold. It is found that a new $D_{03}$ resonance, with mass $M=1668.5\pm 0.5$MeV and width $\Gamma=1.5\pm0.5$MeV, is needed to interpret the experimental data reported by the Crystal Ball collaboration. To verify our results, remeasurements on the differential cross sections and $\Lambda$ polarization in this reaction will be helpful. Furthermore, we also show that the reaction $p\bar p\to \Lambda\bar \Lambda \eta$ is a good place to look for this new resonance if it exists.

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Bo-Chao Liu, Ju-Jun Xie. 2012-12-20. Mechanism of $K^- p \to \eta\Lambda$ reaction near threshold. https://doi.org/10.1007/s00601-013-0625-1

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