Measurement of the cross-section ratio sigma_{psi(2S)}/sigma_{J/psi(1S)} in deep inelastic exclusive ep scattering at HERA

ZEUS Collaboration, H. Abramowicz, I. Abt +144

The exclusive deep inelastic electroproduction of $\psi (2S)$ and $J/\psi (1S)$ at an $ep$ centre-of-mass energy of 317 GeV has been studied with the ZEUS detector at HERA in the kinematic…