The D0 Detector for Run II
The general purpose D0 collider detector at the Fermilab Tevatron has undergone major upgrades for Run II. We describe the current status and performance of the D0 detector.
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arXiv subjects
Levan Babukhadia
Publications and source records attributed to Levan Babukhadia.
Implications of the Tevatron Jet Results on PDF
We report a new measurement of the pseudorapidity (eta) and transverse- energy (Et) dependence of the inclusive jet production cross section in pbar p collisions at sqrt(s)=1.8 TeV using 95 pb**-1 of data collected with the D0 detector at the Fermilab Tevatron. The differential cross section d^2sigma/(dEt deta) is presented up to |eta|=3, significantly extending previous measurements. The results are in good overall agreement with next-to-leading order predictions from QCD, indicate a preference for certain parton distribution functions, and provide the world's best constraint on the gluon distribution at high parton momentum fraction x.
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Central and Forward Inclusive Jets at the Tevatron
We report on a new measurement of the rapidity dependence of the inclusive jet production cross section in pbar p collisions at sqrt(s)=1.8 TeV using 92 pb^-1 of data collected by the DZero detector at the Tevatron collider. The differential cross sections, d^2sigma/(dEt deta), are presented as a function of jet transverse energy (Et) in five pseudorapidity (eta) intervals, up to |eta|=3, significantly extending previous CDF and DZero measurements beyond |eta|=0.7. The extended range of the measurement should provide greater discrimination among different parton distribution functions. We also discuss previous measurements of the inclusive jet cross sections made by the two collider experiments at central pseudorapidities up to |eta|=0.7. Finally, we present recent measurements from the CDF and DZero experiments of the ratio of central inclusive cross sections from two center-of-mass energies, 0.63 TeV and 1.8 TeV, as a function of jet Xt. Experimental results are compared to next-to-leading order QCD predictions.
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Forward Jets, Dijets, and Subjets at the Tevatron
Recent new results on the determination of the rapidity dependence of the differential inclusive jet cross section, $ $, as a function of jet $E_{T}$ in \ppbar collisions at $\sqrt{s}=1800$ GeV, measured by the D0 detector at the Tevatron, are presented along with the comparisons to theoretical next-to-leading order (NLO) perturbative QCD predictions. Triple differential dijet cross sections, $ $, at $\sqrt{s}=1800$ GeV, as well as the new results on jet structure at $\sqrt{s}=1800$ and 630 GeV, as measured by the CDF and D0 detectors, are also discussed.
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Inclusive Jet Cross Sections in $\bar{p}p$ Collisions at $\sqrt{s}$= 630 and 1800 GeV
We have made a precise measurement of the inclusive jet cross section at $\sqrt{s}$=1800 GeV. The result is based on an integrated luminosity of 92 pb^{-1} collected at the Fermilab Tevatron $\bar{p}p$ Collider with the DØdetector. The measurement is reported as a function of jet transverse energy (60 GeV <= E_{T} < 550 GeV), and in the pseudorapidity intervals |η| <= 0.5 and 0.1 <= |η| <= 0.7. A preliminary measurement of the pseudorapidity dependence of inclusive jet production (|η| <= 1.5) is also discussed. The results are in good agreement with predictions from next-to-leading order (NLO) quantum chromodynamics (QCD). DØhas also determined the ratio of jet cross sections at $\sqrt{s}$=630 GeV and $\sqrt{s}$=1800 GeV (|η| <= 0.5). This preliminary measurement differs from NLO QCD predictions.
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