Model-independent measurement of mixing parameters in D^0 → K_S π^+π^- decays - collaboration, LHCb; Cheung, S; Evans, T; Gandini, P; Gauld, R; Greening, E; Hadavizadeh, T; Harnew, N; Hill, D; Hussain, N; Jalocha, J; John, M; et al. (Journal of High Energy Physics, 2016)