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${{\mathit X}{(3940)}}$ WIDTH

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M029W

VALUE (MeV) CL% EVTS DOCUMENT ID TECN  COMMENT $\bf{ 43 {}^{+28}_{-18}}$ OUR AVERAGE  Error includes scale factor of 1.1. $130$ ${}^{+92}_{-49}$ ${}^{+101}_{-70}$ 1.6k 1 AAIJ 2024 AB LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit D}^{*\pm}}{{\mathit D}^{\mp}}{{\mathit K}^{+}}$ $37$ ${}^{+26}_{-15}$ $\pm8$ 52 PAKHLOV 2008 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit X}}$ • • We do not use the following data for averages, fits, limits, etc. • • $<52$ 90 25 ABE 2007 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit X}}$ 1  From a simultaneous amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit D}^{-}}{{\mathit K}^{+}}$, ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit D}^{*-}}{{\mathit D}^{+}}{{\mathit K}^{+}}$ and their c.c.

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