title: Next-to-leading QCD effect on the quark compositeness search at the LHC.
abstract: We present the exact next-to-leading order (NLO) QCD corrections to the dijet production induced by the quark contact interactions at the CERN Large Hadron Collider. 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.
authors.affiliation: Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Chong Sheng
authors.initials: CS
authors.lastname: Li
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Hua Xing
authors.initials: HX
authors.lastname: Zhu
authors.forename: C-P
authors.initials: CP
authors.lastname: Yuan