  We present the exact next-to-leading order (NLO) QCD corrections to dijet
production at the LHC via quark contact interactions, with different color and
chiral structures induced from new physics. Following the recent analysis of
quark compositeness search at the LHC, we find that the NLO QCD corrections can
lower the dijet cross sections by several tens percent, depending on the theory
parameters and the selected kinematic regions, and reduce the dependence of the
cross sections on factorization and renormalization scales. We also calculate
the renormalization group (RG) improved NLO cross sections by summing over the
large logarithms from the RG running of Wilson coefficients. Moreover, we
investigate the NLO QCD effects on various experimental observables and
exclusion limits of quark compositeness scale.
