Measurement of the production cross-section of J/ψ and ψ (2S) mesons in pp collisions at √s = 13 TeV with the ATLAS detector

Measurements of the differential production cross-sections of prompt and non-prompt J/ψ J / ψ and ψ (2S) ψ ( 2 S ) mesons with transverse momenta between 8 and 360 GeV and rapidity in the range $$|y|<2$$ | y | < 2 are reported. Furthermore, measurements of the non-prompt fractions of J/ψ J / ψ and ψ (2S) ψ ( 2 S ) , and the prompt and non-prompt ψ (2S) ψ ( 2 S ) -to- J/ψ J / ψ production ratios, are presented. The analysis is performed using 140 fb ⁻¹ - 1 of √s=13 s = 13 TeV pp collision data recorded by the ATLAS detector at the LHC during the years 2015–2018.