Cross section measurement of $e^{+}{e}^{-}\to \eta \psi (2S)$ and search for $e^{+}{e}^{-}\to \eta \tilde{X}(3872)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +645

The energy-dependent cross section for $e^{+}{e}^{-}\to \eta \psi (2S)$ is measured at eighteen center of mass energies from 4.288 GeV to 4.951 GeV using the BESIII detector. Using the same data…