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Scientific Highlights : CDF Experiment

Scientific Highlights : CDF Experiment. Introduction CDF Run-II detector Phyiscs highlights B Physics , Top, Higgs, … to be continued by Rob. October 20, 2010 US-Japan 30 th Anniversary Symposium Kona, Hawaii. Fumihiko Ukegawa. CDF: C ollider D etector at F ermilab.

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Scientific Highlights : CDF Experiment

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  1. Scientific Highlights : CDF Experiment • Introduction • CDF Run-II detector • Phyiscs highlights • B Physics, Top, Higgs, … • to be continued by Rob October 20, 2010 US-Japan 30th Anniversary Symposium Kona, Hawaii Fumihiko Ukegawa

  2. CDF: Collider Detector at Fermilab • Fermilab Tevatron : Proton-antiproton collider • Highest energy accelerator / collider, at √s = 1.96 TeV, till 2009 • Run-II experiment in progress since 2001 CDF It is certainly an “on-going” experiment, but …

  3. It has been going on for three decades ! • Rich history of collaborative work • A lot of physics output, even for highlights • Impossible to cover them all in two 7-minute talks • More appropriate persons to speak than myself (I am just a “young fella” in CDF) • If I would qualify for it, it is because I started out in CDF as a grad student … And I am still on CDF • I thought it would be the only experiment I work on Back to the present …

  4. 2001/4/1 2010/10/1 Tevatron performance 4×10 32 Peak luminosity Record peak lum : 4.02×1032 cm-2 s-1 (April 16, 2010) Antiproton accumulation rates Record : 28.6×1010 / hour 2×10 32 2010/10/1 Integrated luminosity Run-II total~ 9.5 fb-1 Total ~ 9.5 fb-1 Weekly : 73.1 pb-1 (Apr 13 – 20, 2009) Monthly : 273 pb-1 (March 2010) Annual : 2.5 fb-1 (US FY2010)

  5. Run-II CDF Detector • From inside out • (Blue: new in Run-II experiment) • Tracking system • Silicon detectors : vertex • Main drift chamber COT : p • TOF counter : K/p sep. • Solenoid ： 1.5 Tesla • EM calorimeters • Plug cal, Central pre-shower • Hadron calorimeters • Plug cal • Muon chambers • Forward muon system Excellent tracking (large solenoid) Cal with projective tower geometry Good lepton ID capabilities

  6. Plug EM Calorimeter Scintillating tiles + WLS fiber + PMT Fast response, good energy resolution + uniformity, small dead space Scintillator + fiber, PMT by Kuraray, Hamamatsu KEK, Tsukuba, Waseda

  7. CDF-II silicon detectors Collision point • SVX II • 5 layers • Radii from 2.5 cm to 11 cm • Double-sided,90oand 1.2o stereo • Layer 00 • At radius ~1.6 cm, on beam pipe • Minimize multiple scattering • Single-sided • Intermediate silicon layers (ISL) • 3 more layers at R = 20 - 29 cm • Construction similar to SVX II • Precision tracking to higher eta Precision tracking and vertexing : crucial for top and B physics

  8. SVX II Hiroshima, Okayama Layer 1, 2, 4 sensors by Hamamatsu ISLTsukuba, Osaka City ~50% of sensors by Hamamatsu

  9. Layer 00 Installation

  10. The CDF Detector Running smoothly and efficiently

  11. CDF Physics Many important results in: • Electroweak physics • Top Quark physics • B physics • QCD • Higgs searches • New particles / phenomena > 250 journal publications with Run-II data, More to come. 22 PhD’s from Japanese institutions (Run II)

  12. CDF B physics • No explicit mention of B physics in the design report (1981) • CDF turned out to be quite suited for B physics • Solenoid + tracking, calorimeters, lepton ID • Run 0 (1988 – 89) • Demonstration that CDF can detect B decays • Single electrons, di-muons • Run I (1992 – 96) • Silicon vertex detector installed • Significant measurements ( lifetimes, Bd oscillations, Bc discovery …) • Run II (2001 - ) • Enhanced capability with silicon trigger (SVT) • Bs oscillations, CP violation, rare decays … Blue: significant Japanese physicist contributions

  13. Fourier analysis

  14. Impact on the CKM unitarity triangle Summer 2005 Fall 2006 CKM theory tested/confirmed with precision Nobel prize 2008 Now looking for possible inconsistencies due to new physics

  15. Signal ～6500 5.2 fb-1 SM Looking for new CP phase beyond CKM More data will surely help

  16. Forbidden at tree level in SM Can proceed in higher order Belle result on asymmetry Sensitive to new physics hint of new physics ?

  17. mm mass dist. Polarization F/B asymmetry Want more data here, too

  18. Conclusions • Excellent original detector design philosophy • Large solenoid + precision tracking, Segmented tower cals, Lepton ID • Went through continuous upgrades • Enhanced physics capabilities • Accelerator performance has excelled too • 23 events  30 nb-1  4.5 pb-1  110 pb-1  > 10 fb-1 • 1985 1987 1988-89 1992-96 2001 - • EWK, QCD, Top, Exotics, Higgs, and B physics • Looking forward to the 4th decade !

  19. Backup slides

  20. Run-II Silicon Vertex Trigger : SVT Use silicon information at the 2nd level of trigger Calculate the impact parameters of tracks on-line, with a resolution of ~50 mm Enables us to collect B deacys to hadronic final states, such as

  21. TOF counter

  22. Central Preshower Counter (CPR2) Scintillating tiles with WLS fiber readout Hamamatsu H8711 16-pixel multi-Anode PMT

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