A study of the Z production cross-section in pp collisions at s = 7 TeV using tau final states - collaboration, TL; Aaij, R; Beteta, C; Adametz, A; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M; et al. (Journal of High Energy Physics, 2012)