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USJ-30-CDF-ukegawa

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					       Scientific Highlights :
         CDF Experiment

     1. Introduction

     2. CDF Run-II detector

     3. Phyiscs highlights
            B Physics, Top, Higgs, …
                  to be continued by Rob


October 20, 2010                           Fumihiko Ukegawa
US-Japan 30th Anniversary Symposium
Kona, Hawaii
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 …
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 …
                                            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)          2×10 32

 Antiproton accumulation rates
     Record : 28.6×1010 / hour



                                                                            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)
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
 Excellent tracking (large solenoid)       Forward muon system
 Cal with projective tower geometry
 Good lepton ID capabilities
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
CDF-II silicon detectors




                                      Collision point
SVX II
• 5 layers
• Radii from 2.5 cm to 11 cm          Layer 00
• Double-sided, 90o and 1.2o stereo   • 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
SVX II   Hiroshima, Okayama    Layer 1, 2, 4 sensors by Hamamatsu




ISL   Tsukuba, Osaka City     ~50% of sensors by Hamamatsu
Layer 00




  Installation
The CDF Detector

 Running smoothly and efficiently
   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)
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

1. Run 0 (1988 – 89)
       Demonstration that CDF can detect B decays
             Single electrons, di-muons

2. Run I (1992 – 96)
       Silicon vertex detector installed
       Significant measurements ( lifetimes, Bd oscillations, Bc discovery …)

3. Run II (2001 - )
       Enhanced capability with silicon trigger (SVT)
       Bs oscillations, CP violation, rare decays …
                                Blue: significant Japanese physicist contributions
Fourier analysis
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
                   Signal
  5.2   fb-1       ~6500




                                           SM




                             Looking for new CP phase beyond CKM
More data will surely help
                              Forbidden at tree level in SM
                              Can proceed in higher order




                           Belle result on asymmetry




Sensitive to new physics


                                    hint of new physics ?
mm mass dist.   Polarization    F/B asymmetry




                               Want more data here, too
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 !
Backup slides
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
TOF counter
Central Preshower Counter (CPR2)
Scintillating tiles with WLS fiber readout




                          Hamamatsu H8711
                          16-pixel multi-Anode PMT

				
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