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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
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

cdf c ollider d etector at f ermilab
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
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 …

slide4

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)

slide5

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

slide6

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

slide7

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

slide8

SVX II Hiroshima, Okayama Layer 1, 2, 4 sensors by Hamamatsu

ISLTsukuba, Osaka City ~50% of sensors by Hamamatsu

slide9

Layer 00

Installation

slide10

The CDF Detector

Running smoothly and efficiently

cdf physics
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)

slide12

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

slide14

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

slide15

Signal

~6500

5.2 fb-1

SM

Looking for new CP phase beyond CKM

More data will surely help

slide16

Forbidden at tree level in SM

Can proceed in higher order

Belle result on asymmetry

Sensitive to new physics

hint of new physics ?

slide17

mm mass dist.

Polarization

F/B asymmetry

Want more data here, too

slide18

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 !
slide20

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

slide22

Central Preshower Counter (CPR2)

Scintillating tiles with WLS fiber readout

Hamamatsu H8711

16-pixel multi-Anode PMT