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Two states for the $\Xi(1820)$ resonance

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arxiv 2309.03618 v1 pith:7QB7CAED submitted 2023-09-07 hep-ph

R. Molina , Wei-Hong Liang , Chu-Wen Xiao , Zhi-Feng Sun , E. Oset This is my paper
classification hep-ph
keywords stateswidthlambdaresonanceapparentapproachaveragebaryons
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abstract

We recall that the chiral unitary approach for the interaction of pseudoscalar mesons with the baryons of the decuplet predicts two states for the $\Xi(1820)$ resonance, one with a narrow width and the other one with a large width. We contrast this fact with the recent BESIII measurement of the $K^- \Lambda$ mass distribution in the $\psi(3686)$ decay to $K^- \Lambda \bar\Xi^+ $, which demands a width much larger than the average of the PDG, and show how the consideration of the two $\Xi(1820)$ states provides a natural explanation to this apparent contradiction.

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Cited by 1 Pith paper

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  1. Signatures of Odd-Parity $s$-wave $\Xi^*$ States in Femtoscopic Correlation Functions

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Using a unitarized hidden-gauge model, the authors dynamically generate Xi(1950)-like and Xi(2120)-like poles and predict femtoscopic correlation functions for six vector-baryon channels.

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