We report the first measurement of the $Q^2$ distribution of $X(3915)$ produced by single-tag two-photon interactions. The decay mode used is $X(3915)\to J/\psi \omega$. The covered $Q^2$ region is from $1.5(\mathrm{GeV}/c{)}^2$ to $10.0(\mathrm{GeV}/c{)}^2$. We observe $7.9\pm 3.1(\mathrm{stat})\pm 1.5(\mathrm{syst})$ events, where we expect $4.1\pm 0.7$ events based on the $Q^2=0$ result from the no-tag two-photon process, extrapolated to higher $Q^2$ region using the $c\overline{c}$ model of Schuler, Berends, and van Gulik. The shape of the distribution is also consistent with this model; we note that statistical uncertainties are large.

• Received 23 January 2023
• Accepted 12 June 2023

DOI:https://doi.org/10.1103/PhysRevD.108.012004

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Published by the American Physical Society