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The prompt and non-prompt production cross-sections for $\psi(2S)$ mesons aremeasured using 2.1 fb$^{-1}$ of $pp$ collision data at a centre-of-mass energyof 7 TeV recorded by the ATLAS experiment at the LHC. The measurement exploitsthe $\psi(2S)\to J/\psi(\to\mu^+\mu^-)\pi^+\pi^-$ decay mode, and probes$\psi(2S)$ mesons with transverse momenta in the range $10\leq p_T<100$ GeV andrapidity $|y|<2.0$. The results are compared to other measurements of$\psi(2S)$ production at the LHC and to various theoretical models for promptand non-prompt quarkonium production.

Measurement of the production cross-section of $\psi(2S)\to J/\psi(\to\mu^+\mu^-)\pi^+\pi^-$ in $pp$ collisions at $\sqrt{s}=7$ TeV at ATLAS