Measurement of the 𝜂𝑐(1𝑆) production cross-section in 𝑝 𝑝 collisions at 𝑠√=13 TeV - Aaij, R; Beteta, CA; Ackernley, T; Bjørn, M; Fischer, KM; Gruberg Cazon, BR; Hadavizadeh, T; Hancock, TH; Harnew, N; Hill, D; Jalocha, J; John, M; et al. (European Physical Journal C, 2020)