Distribution of $N_\textrm{part}$ in the three $N_c$ intervals of the minimum bias events defined in Table 1.

(Left) Invariant mass distribution of $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ candidates with $\langle \mathrm{N_{part}} \rangle=10.6\pm2.9$, for $ p_{\mathrm{T}} <15.0\text{ Ge V /}c $ and $2.0<y <4.5$. (Right) Distribution of $\ln( p_{\mathrm{T}} ^2)$ of the $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ candidates for $\langle \mathrm{N_{part}} \rangle=10.6\pm2.9$ after background subtraction. The projections of the fit to disentangle the coherently photo-produced and hadronically produced $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ mesons are overlaid.

(Top left) Differential yields of photo-produced $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ candidates as a function of rapidity and (top right) $\langle \mathrm{N_{part}} \rangle$ . (Bottom) Double differential yields as a function of $ p_{\mathrm{T}}$ . The vertical inner blue bars represent the statistical uncertainty and the outer red bars the total uncertainty. The horizontal bars in the $\langle \mathrm{N_{part}} \rangle$ results correspond to the standard deviation of the $\rm{N_{part}}$ distribution of the MB events. The yields are compared to the prediction from Ref. [17,41] that take (black) or not take (green) into account the effect from the overlap region of the collision.

Animated gif made out of all figures.

Average number of participant nucleons, $\langle \mathrm{N_{part}} \rangle$ , along with the corresponding standard deviation of the $N_\textrm{part}$ distribution, $\sigma_{\rm part}$, for each of the selected $N_c$ intervals.

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