• Motivation for QCD measurements

• Sample Abstracts

• Material Approved for Conferences
  Run I and Run II results,
  (divided into Run II jets, and Run I: K_T, cone jets, photons, diffraction)

• Recent DØ QCD Talks

Motivation for QCD measurements

Why measure this stuff?

Sample Abstracts

Twelve abstracts sent to ICHEP02.

Run II Jets analyses

Recent Stuff: updated demo results for ICHEP02, APS02, and archive of older demo results (La Thuile 02, and Moriond 02).

Old Stuff: Some demo plots, using pre-shutdown data are available on the DØ results page, embedded in a file containing the demos from other physics groups.

Selected Run I analyses

Jets (K_T algorithm)

• K_T Dijet Transverse Thrust Cross Section (link to another page) - Veronica Sorin

• K_T Inclusive Jet Cross Section (link to PLB preprint and Wine and Cheese talk) - Sebastian Grinstein
  Bare .eps figures (link to directory...find and click 00-readme.html for descriptions!)

• Subjet multiplicity of gluon and quark jets
  reconstructed using the kT algorithm in pbarp collisions
  (link to preprint) - Robert Snihur
  .eps figures:

  quark and gluon fractions in data (Fig. 29 from PRD, but in color)
  subjet multiplicity in data, MC, and theory (Fig. 30 from PRD, but in color)

  All .eps figs from the published PRD

Jets (cone algorithm)

• Inclusive Jet Production in ppbar Collisions full rapidity dependence (link to directory) - Levan Babukhadia

• "R32", Ratios of Multijet Cross Sections in p-pbar Collisions at sqrt(s)=1.8 TeV (link to paper on hep-ex) - Elizabeth Gallas

  bare .eps figures:

  R32 in main eta region
  R32, 2 eta regions (supplemental, not actually published)
  R32 vs E_T threshold
  R32 chi-square traces
  

• 630/1800 Jet ratio (link to another page) - John Krane

• Jets PRD (link to another page) - Iain Bertram
  Each and every figure (numbered 1 to 105) from DØ's tour-de-force on Jet physics. It covers the Run 1b inclusive jet cross section at 1800 GeV, the 1800 dijet mass analysis, the 630/1800 jet cross section ratio, and the dijet angular distributions at 1800 GeV.

Photons

• Ratio of isolated photon cross sections
  in ppbar collisions at 630 and 1800 GeV
  (link to APS official versions) - Michael Strauss

  bare .eps figures:

  Plot of Purity Fit
  Plot of Purity as a function of E_T
  Plot of Cross Section
  Plot of Cross Section normalized to Theory
  Plot of 630/1800 Ratio

• Isolated Photon Cross Section
  in ppbar collisions at 1800 GeV
  (a link to Phys. Rev. Lett. {84} 2786 (2000) in .pdf format) - John Womersley

  bare .eps figures:

  Figure 1
  Figure 2
  Figure 3
  Figure 4

Diffractive Physics

• Hard Color Singlet Exchange (link to another page) - Andrew Brandt

• John Krane, at the DØ/CDF/Theory Matrix Element and Monte Carlo Tuning Workshop (Fermilab)
  "Low-p_T Multijet Cross Sections at DØ" (.ppt).

• Elizabeth Gallas, at Hadron Collider Physics HCP02,
  "Jet Production at DØ" (.ppt or .pdf). Also the proceedings.
  

• Silvia Tentindo-Repond, at Hadron Collider Physics HCP02,
  "Diffractive Physics at DØ" (.ppt). Here are the proceedings.
  Silvia wrote DØNote4051 based on her talk.

• Alexander Kupco, at the Workshop on Low-x Physics (Antwerpen),
  "Final States at DØ" (.ps.gz). Warning, large file!
  

• John Krane, at DØ Jet/Missing E_T meeting,
  "Lost Jets Update" (.ppt). (Made public with express permission.)
  

• John Krane, at QCD02 (Beijing),
  "Experimental QCD at DØ" (.ppt).
• Eve Kovacs (of CDF), also at QCD02, "QCD at CDF" (Part I, Part II in .ps.gz format).
  

• Marek Zielinski, at ICHEP02,
  "Jet and Photon Physics at DØ" (.ppt, and .pdf). Also, the proceedings (.ps)

• Ursula Bassler, at ICHEP02,
  "Jet Measurements at DØ using a kT Algorithm" (.ppt powerpoint and proceedings .ps)

  Click here for the rest of the DØ ICHEP talks.

• Nirmalya Parua, at DPF02,
  "First Jet Results using the Upgraded DØ Detector" (.ppt powerpoint)

• Alexander Kupco, at APS02,
  "Jets in the first DØ Run II data" (.pdf or .ps.gz)

• John Krane, at Calor02,
  "DØ's Recent Results and Experiences with k_T and Cone Jet Algorithms" (.ppt powerpoint or .ps.gz gzipped postscript). Also, the proceedings (.ps).

• Christina Hebert, at APS02,
  "Search for New Particles Decaying to Two Jets" (.pdf or .ps.gz)

• Daniel Elvira, at Cambridge and Montpellier 2002,
  "Jet Measurements at DØ using a K_T Algorithm" (.pdf)

• Andrew Brandt, at LISHEP02,
  "Observation of a Diffractive W" (.pdf)

• Veronica Sorin, at Fermilab Wine and Cheese (Jan 2002),
  "Dijet Transverse Thrust Cross Sections at DØ" : (.ppt powerpoint)

• Sebastian Grinstein, at Fermilab Wine and Cheese (Nov 2001),
  "The Inclusive Jet Cross Section Using the K_T Algorithm at DØ" : (.ps) and individual plots

• Mike Strauss, at PIC2001,
  "Recent Results on Jet Physics and Alpha_s" : (.ppt), and proceedings

• Thomas Nunnemann, at ISMD01,
  "Selected QCD Results from the Tevatron" : (.ps), (.pdf), and proceedings

• John Krane, at Rencontres de Moriond 2001,
  "QCD: Approaching True Precision, or, Latest Jet Results from the Tevatron" : (.ppt), (.ps), proceedings (.ps), and plots