Benchmark calculations of electron impact electronic excitation of the hydrogen molecule

We present benchmark integrated and differential cross-sections for electron collisions with H2 using two different theoretical approaches, namely, the R-matrix and molecular convergent close-coupling. This is similar to comparative studies conducted on electron-atom collisions for H, He and Mg. Electron impact excitation to the b3Σu+, a3Σg+, B1Σu+, c3Πu, EF1Σg+, C1Πu, e3Σu+, h3Σg+, B′1Σu+ and d3Πu excited electronic states are considered. Calculations are presented in both the fixed nuclei and adiabatic nuclei approximations, where the latter is shown only for the b3Σu+ state. Good agreement is found for all transitions presented. Where available, we compare with existing experimental and recommended data.