Next-to-leading QCD effect to the quark compositeness search at the LHC

Abstract

Recently, the CMS and ATLAS Collaborations at the CERN Large Hadron Collider (LHC) have set exclusion limits on the quark compositeness scale by comparing their data to the leading order and the scaled next-to-leading order (NLO) QCD calculations, respectively. In this Letter, we present the exact NLO QCD corrections to the dijet production induced by the quark contact interactions. We show that as compared to the exact calculation, the scaled NLO QCD prediction adopted by the ATLAS Collaboration has overestimated the new physics effect on some direct observables by more than 30% and renders a higher limit on the quark compositeness scale. The destructive contribution from the exact NLO correction will also lower the compositeness scale limit set by the CMS Collaboration.

Published version in Phys.Rev.Lett

References in corpus (2)

• Implications of CTEQ global analysis for collider observables
• Parton Distributions for LO Generators

Cited by in corpus (4)

• Precision Probes of QCD at High Energies
• Search for quark contact interactions and extra spatial dimensions using dijet angular distributions in proton-proton collisions at sqrt(s) = 8 TeV
• Search for contact interactions using the inclusive jet pT spectrum in pp collisions at sqrt(s) = 7 TeV
• Four-Quark Effective Operators at Hadron Colliders