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Particle Physics Explorations: Tevatron Data and Theory Comparisons

Delve into the latest findings from The Tevatron Connection, including comparisons with theoretical models. Explore topics such as top pair cross sections, single top cross sections, charm meson cross sections, and more. Discover the fascinating world of high-energy physics through over 400 pb-1 of data. Dive deep into events like W-boson interactions, Z-boson cross sections, and inclusive jet cross sections. Follow the research presented by Rick Field from CDF/Florida on various particle interactions and cross sections. Witness the alignment between experimental results and theoretical predictions across different particles and processes.

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Particle Physics Explorations: Tevatron Data and Theory Comparisons

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  1. The TevatronConnection and comparisons with theory! A Few CDF Run 2 Proton-AntiProton Cross Sections • Top Pair Cross-Section • Single Top Cross-Section • J/Y Cross-Section • b-Hadron Cross-Section • b-Jet & b-DiJet Cross-Sections • Charm Meson Cross-Sections • g + b/c Cross-Sections • g + g Cross-Section • Z-boson Cross-Section We now have over 400 pb-1 of data! • W-boson Cross-Section • W+n Jets Cross-Sections • W/Z + g Cross-Sections • W + W Cross-Section • Z + W & Z + Z Cross-Sections • Inclusive Jet Cross-Sections Rick Field - CDF/Florida

  2. Top Pair Cross SectionCDF Run 2 Summary 200 pb-1 • Observed cross sections consistent with each other and with the standard model prediction (1.96 TeV, mt = 175 GeV) Bonciani et al., Nucl. Phys. B529, 424 (1998) Kidonakis and Vogt, Phys. Rev. D68, 114014 (2003) Rick Field - CDF/Florida

  3. s-channel t-channel t-channel Single Top Cross SectionCDF Run 2 Search 0.88 pb 1.98 pb • Search for W + 2 jets and tag one b. Do likelihood fit to HT (s+t channed combined). st < 10.1 pb @ 95% CL st+s < 17.8 pb @ 95% CL Rick Field - CDF/Florida

  4. J/   B K The J/Y Cross SectionCDF Run 2 • The J/y inclusive cross-section includes contribution from the direct production of J/y and from decays from excited charmonium, Y(2S), and from the decays of b-hadrons, B-> J/y + X. J/y coming from b-hadrons will be displaced from primary vertex! 39.7 pb-1 Down to PT = 0! Rick Field - CDF/Florida

  5. b-hadron Cross SectionCDF Run 2 • Run 2 b-hadron PT distribution compared with FONLL (CTEQ6M). Cacciari, Frixone, Mangano, Nason, Ridolfi • Excellent agreement between theory and experiment! 39.7 pb-1 |Y| < 1.0 b-hadron PT Rick Field - CDF/Florida

  6. b-Jet Cross SectionsCDF Run 2 Arbitrary normalization! • b-quark tag based on displaced vertices. Secondary vertex mass discriminates flavor. • Require one secondary vertex tagged b-jet within 0.1 < |y|< 0.7 and plot the inclusive jet PT distribution (MidPoint, R = 0.7). Rick Field - CDF/Florida

  7. b-DiJet Cross SectionCDF Run 2 Normalized to one! bJet-bbarJet invariant mass bJet-bbarJet Df • Require two secondary vertex tagged b-jets within |h|< 1.2. One of these tagged jets has to have a corrected tranverse energy greater than 30 GeV, the other has to have a raw transverse energy greater than 10 GeV. Rick Field - CDF/Florida

  8. Prompt Charm Meson Cross SectionsCDF Run 2 • Theory calculation from M. Cacciari and P. Nason: Resummed perturbative QCD (FONLL), JHEP 0309,006 (2003) Rick Field - CDF/Florida

  9. g + b/c Cross SectionsCDF Run 2 • b/c-quark tag based on displaced vertices. Secondary vertex mass discriminates flavor. Rick Field - CDF/Florida

  10. g + b/c Cross SectionsCDF Run 2 g + b g + c • PYTHIA Tune A correctly predicts the relative amount of u, d, s, c, b quarks within the photon events. ET(g) > 25 GeV Rick Field - CDF/Florida

  11. g + g Cross SectionCDF Run 2 g + gDf g + g mass • Di-Photon cross section with 207 pb-1 of Run 2 data compared with next-to-leading order QCD predictions from DIPHOX and ResBos. Rick Field - CDF/Florida

  12. Z-boson Cross SectionCDF Run 2 • Impressive agreement between experiment and NNLO theory (Stirling, van Neerven)! Rick Field - CDF/Florida

  13. W-boson Cross SectionsCDF Run 2 • Impressive agreement between experiment and NNLO theory (Stirling, van Neerven)! Rick Field - CDF/Florida

  14. Alpgen + HERWIG W + n Jets Cross SectionsCDF Run 2 • Run 2 W + n Jets Cross Section compared with Run 1 (JetClu, R = 0.4). • Run 2 data compared with Alpgen + HERWIG. Rick Field - CDF/Florida

  15. W + g Cross SectionsCDF Run 2 ET(g) > 7 GeV R(lg) > 0.7 Rick Field - CDF/Florida

  16. Z + g Cross SectionsCDF Run 2 Note: (W)/(Z) ≈ 4 while (W)/(Z) ≈ 11 ET(g) > 7 GeV R(lg) > 0.7 Rick Field - CDF/Florida

  17. W+W Cross SectionCDF Run 2 Campbell & Ellis 1999 Rick Field - CDF/Florida

  18. Z+W, Z+Z Cross Sections CDF Run 2 Upper Limit Rick Field - CDF/Florida

  19. Inclusive Jet Cross Section CDF Run 2 353 pb-1! ET > 500 GeV! Parton Level! Calorimeter Level! • The challenge is that we measure the jets at the “calorimeter level”. We do not measure partons! Rick Field - CDF/Florida

  20. Inclusive Kt Jet Cross SectionCDF Run 2 I wish we had a QCD NLO Monte-Carlo Model with Parton-Showers, Fragmentation, Beam-Beam Remnants, etc.! We are using Kt and MidPoint in Run 2! • The Run 2 Kt inclusive jet cross section compared with PYTHIA Tune A (CTEQ5L). Rick Field - CDF/Florida

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