The jet cross section in pp interactions at √s = 45 GeV and its √s dependence

Abstract The differential cross section for production of jets in pp interactions at y = 0 and p T from 6–12 GeV/ c has been measured at √ s = 45 GeV at the CERN Intersecting Storage Rings and compared with a previous measurement at √ s = 63 GeV. The data were obtained using a 2.1 sr hadron calorimeter which was triggered on transverse energy. The energy dependence of the jet cross section is well described by (1− x T ) m p T − n , with m = 10.6±1.0 and n = 5.3±0.2. The results are in good agreement with predictions obtained from a QCD-motivated model.