Measurement of four-jet production in proton-proton collisions at $\sqrt{s} = 7$ TeV

Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum ${p}_{\mathrm{T}}$ and pseudorapidity $\eta $, together with the correlations in azimuthal angle and the ${p}_{\mathrm{T}}$ balance among the jets. The data sample was collected in 2010 at a center-of-mass energy of 7 TeV with the CMS detector at the LHC, with an integrated luminosity of $36\text{}\text{}{\mathrm{pb}}^{-1}$. The cross section for exactly four jets, with two hard jets of ${p}_{\mathrm{T}}>50\text{}\text{}\mathrm{GeV}$ each, together with two jets of ${p}_{\mathrm{T}}>20\text{}\text{}\mathrm{GeV}$ each, within $|\eta |