X(3960), X0(4140), and other compact <inline-formula><tex-math id="M3">\begin{document}${\boldsymbol c \boldsymbol s\bar{\boldsymbol c}\bar{\boldsymbol s}} $\end{document}</tex-math><alternatives><graphic specific-use="online" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2024-0014_M3.jpg"/><graphic specific-use="print" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2024-0014_M3.png"/></alternatives></inline-formula> states

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