Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7 TeV. - Khachatryan V; Sirunyan AM; Tumasyan A; Adam W; Bergauer T; Dragicevic M; Erö J; Fabjan C; Friedl M; Frühwirth R; Ghete VM; Hammer J; et al. (Physical review letters, 2010)