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- Measurement of the differential cross-sections of prompt and non-prompt production of $J/\psi $ and $\psi (2\mathrm {S})$ in $pp$ collisions at $\sqrt{s} = 7$ and 8 TeV with the ATLAS detectorPublication . ATLAS collaboration (2865 authors); Aguilar-Pimentel, Juan Antonio; Amor Dos Santos, Susana Patricia; Anjos, Nuno; Araque, Juan Pedro; Cantrill, Robert; Carvalho, João; Castro, Nuno Filipe; Conde Muiño, Patricia; Da Cunha Sargedas De Sousa, Mario Jose; Fiolhais, Miguel; Galhardo, Bruno; Gomes, Agostinho; Gonçalo, Ricardo; Jorge, Pedro; Lopes, Lourenco; Machado Miguens, Joana; Maio, Amélia; Maneira, José; Onofre, António; Palma, Alberto; Pedro, Rute; Pina, João Antonio; Santos, Helena; Saraiva, João; Silva, José; Tavares Delgado, Ademar; Veloso, Filipe; Wolters, HelmutThe production rates of prompt and non-prompt $J/\psi $ and $\psi (2\mathrm {S})$ mesons in their dimuon decay modes are measured using 2.1 and 11.4 fb$^{-1}$ of data collected with the ATLAS experiment at the Large Hadron Collider, in proton–proton collisions at $\sqrt{s}=7$ and 8 respectively. Production cross-sections for prompt as well as non-prompt sources, ratios of $\psi (2\mathrm {S})$ to $J/\psi $ production, and the fractions of non-prompt production for $J/\psi $ and $\psi (2\mathrm {S})$ are measured as a function of meson transverse momentum and rapidity. The measurements are compared to theoretical predictions.