Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at $sqrt{s} = 7$ TeV
Phys.Rev.Lett. 106 (2011) 201804, 2011.
The collaboration

Abstract (data abstract)
CERN-LHC. Measurement of dijet angular distributions in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample, collected with single jet triggers, has a total integrated luminosity of 36 pb-1, with jets being reconstructed using the anti-KT clustering algorithm using R=0.5. The data are presented for the variable CHI defined as EXP(|Y1-Y2|) where Y1 and Y2 are the rapidities of the two leading (highest PT) jets (P=3 and P=4 in this record). Numerical values suppled by A Hinzmann.