NLO QCD corrections to dijet production via quark contact interactions

TL;DR

This paper calculates precise NLO QCD corrections to dijet production via quark contact interactions at the LHC, revealing significant impacts on cross sections and experimental limits, and improving theoretical predictions for new physics searches.

Contribution

It provides the first exact NLO QCD corrections for dijet production with quark contact interactions, including RG improvements and analysis of experimental implications.

Findings

NLO corrections can reduce dijet cross sections by tens of percent.

NLO corrections decrease dependence on factorization and renormalization scales.

Results refine exclusion limits on quark compositeness scale.

Abstract

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.