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arXiv · 1808.10373

The $B^+ \to J/\psi \omega K^+ $ reaction and $D^*\bar{D}^*$ molecular states

L. R. Dai·G. Y. Wang·X. Chen·E. Wang·E. Oset·D. M. Li
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Abstract

We study the $B^+ \to J/\psi \omega K^+ $ reaction, measured by the LHCb collaboration, and show that it is driven by the presence of two resonances, the $X(3940)$ and $X(3930)$, that are of molecular nature and couple most strongly to $D^* \bar{D}^*$, but also to $J/\psi\omega$. Because of that, in the $J/\psi\omega$ mass distribution we find a peak related to the excitation of the resonances and a cusp with large strength at the $D^* \bar{D}^*$ threshold.

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L. R. Dai, G. Y. Wang, X. Chen, E. Wang, E. Oset, D. M. Li. 2018-08-30. The $B^+ \to J/\psi \omega K^+ $ reaction and $D^*\bar{D}^*$ molecular states. https://doi.org/10.1140/epja%2Fi2019-12706-6

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