The Inclusive Jet Cross Section in ppbar Collisions at sqrt{s}=1.8 TeV using the kT Algorithm

Abstract

The central inclusive jet cross section has been measured using a successive-combination algorithm for reconstruction of jets. The measurement uses 87.3 pb^{-1} of data collected with the D0 detector at the Fermilab Tevatron ppbar Collider during 1994-1995. The cross section, reported as a function of transverse momentum (pT>60 GeV) in the central region of pseudorapidity (|η|<0.5), exhibits reasonable agreement with next-to-leading order QCD predictions, except at low pT where the agreement is marginal.

Figures (4)

• Figure 1: The central ($|\eta|<0.5$) inclusive jet cross section obtained with the k$_{\perp}\:$ algorithm at $\sqrt{s}=1.8$ TeV. Only statistical errors are included. The solid line shows a prediction from NLO pQCD.
• Figure 2: Fractional experimental uncertainties on the cross section. The discontinuities in the luminosity uncertainty are related to the use of different triggers [11].
• Figure 3: Difference between data and jetrad pQCD, normalized to the predictions. The shaded bands represent the total systematic uncertainty. In the bottom plot a herwig hadronization contribution has been added to the prediction (open circles).
• Figure 4: Ratio of particle-level over parton-level herwigp$_{T}\:$ spectra for jets, as a function of the parton jet transverse momentum.