Dimuon mass distributions, with fit results superimposed, in bins of $p_{\rm T}$ . Results for $ p_{\rm T} >7 {\mathrm{ Ge V /}c} $ are merged in the last bin.

Distributions of the data with projections of the fit superimposed for (left) the dimuon invariant mass and (right) $t_z$. The thick blue line is the total fit function and the hatched area the background component.

Acceptance (orange circles), reconstruction (upward-facing red triangles), trigger (downward-facing green triangles) and total (blue squares) $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ efficiency, as a function of $p_{\rm T}$ . The efficiencies are evaluated from a Monte Carlo simulation in which the $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ is produced unpolarised.

Differential production cross-section for inclusive $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ production in the rapidity range $2.0<y<4.5$ as a function of $p_{\rm T}$ . The vertical error bars are the quadratic sums of the statistical and systematic uncertainties.

Animated gif made out of all figures.

Relative systematic uncertainties on the luminosity (%).

Relative systematic uncertainties on the cross-section results and on the fraction of $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ mesons from $b$-hadron decay (%).

Differential cross-section ${\rm d}\sigma / {\rm d} p_{\rm T} $ at $\sqrt{s}=2.76\mathrm{ Te V} $ for inclusive $ { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu}$ production in bins of $p_{\rm T}$ . The rapidity range covered is $2.0<y<4.5$. The first uncertainty is statistical and the second is systematic.