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arXiv · 2003.03894

Enhancement near the $\bar{p}\Lambda$ threshold in the $\chi_{c0}\to \bar{p}K^+\Lambda$ reaction

Guan-Ying Wang·Man-Yu Duan·En Wang·De-Min Li
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Abstract

We have analyzed the reaction $\chi_{c0}\to \bar{p} K^+\Lambda$ reported by the BESIII Collaboration, taking into account the contributions from the intermediate $K(1830)$, $N(2300)$, and $\Lambda(1520)$ resonances. Our results are in good agreement with the BESIII measurements, and it is found that the anomalous enhancement near the $\bar{p}\Lambda$ threshold is mainly due to the contribution of the $K(1830)$ resonance. We also show that the interference of the high-mass $N^*$ and $\Lambda^*$ can not produce the anomalous enhancement near the $\bar{p}\Lambda$ threshold.

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Guan-Ying Wang, Man-Yu Duan, En Wang, De-Min Li. 2020-03-09. Enhancement near the $\bar{p}\Lambda$ threshold in the $\chi_{c0}\to \bar{p}K^+\Lambda$ reaction. https://doi.org/10.1103/physrevd.102.036003

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