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

ATLAS Collaboration

The prompt and non-prompt production cross-sections for $\psi (2S)$ mesons are measured using 2.1 fb${}^{-1}$ of $pp$ collision data at a centre-of-mass energy of 7 TeV recorded by the A…