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arXiv · 2108.02387

X_1(2900) as a D_1 K molecule

Hao Chen·Hong-Rong Qi·Han-Qing Zheng
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Abstract

The analyses of the LHCb data on X(2900) in the D^- K^+ spectrum are performed. Both dynamically generated and explicitly introduced X_1(2900) are considered. The results show that both these two approaches support the interpretation of X_1(2900) as a bar{D}_1 K molecular state, with J^{P}=1^- and an iso-singlet interpretation is much more favorable. The effect of triangle singularity on the production of X_1(2900) is also discussed, and it is found that it cannot be interpreted as a pure triangle cusp.

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Hao Chen, Hong-Rong Qi, Han-Qing Zheng. 2021-08-05. X_1(2900) as a D_1 K molecule. https://doi.org/10.1140/epjc/s10052-021-09603-w

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