Measurement of the cross section of $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ at center-of-mass energies from 3.872 GeV to 4.700 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +556

Using data samples with an integrated luminosity of 19 fb${}^{-1}$ at twenty-eight center-of-mass energies from 3.872 GeV to 4.700 GeV collected with the BESIII detector at the BEPCI…