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The Hidden Charm Decay of $X(3872), Y(3940)$ and Final State Interaction Effects

Xiang Liu·Bo Zhang·Shi-Lin Zhu
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Abstract

We investigate whether the final state interaction (FSI) effect plays a significant role in the large hidden charm decay width of X(3872) and Y(3940) using a model. Our numerical result suggests (1) the FSI contribution to $X(3872)\to J/ψρ$ is tiny; (2) $Γ[ Y(3940)\to D\bar{D}^{*}+\text{h.c.}\to J/ψω]$ from FSI is around several keV, far less than Belle's experimental value 7 MeV.

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Xiang Liu, Bo Zhang, Shi-Lin Zhu. 2006-12-16. The Hidden Charm Decay of $X(3872), Y(3940)$ and Final State Interaction Effects. https://doi.org/10.1016/j.physletb.2006.12.031

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