Present Status of Physics at Tevatron/CDF&Prospect with Higher Luminosity
Kazuhiro Yamamoto(Osaka City University)
forCDF Collaboration
RPIA2002, October 29th 2002

Tevatron/CDF Run 2 Upgrade
Present Status
Preliminary Physics Results
Future Prospects

Fermilab Accelerator Complex

CDF

Tevatron

Main Injector
and Recycler

D0Fermilab Accelerator Complex (2)Tevatron Run 2 Upgrade
Higher Energy Collisions

ps = 1.8 TeV ! 1.96 TeV

Increased number of p and p bunches
Shorter bunch spacing
Newly builtf

6 x 6 ! 36 x 36

3.5 ms ! 396 ns

150 GeV Main Injector
8 GeV Recycler

for increasing luminosity at Tevatron

Fermilab Accelerator Complex (3)Debuncher (8GeV)
Accumulator (8GeV) Linac (400MeV)
Cockroft Walton(750keV)

Cockroft-Walton (750keV)
Linac (400MeV)

Booster (8GeV)
Main Injector(150GeV / 120GeV)

Booster (8GeV)

Recycler(8GeV)

Main Injector(120GeV for p-bar production)(150GeV for injection to Tevatron)
Debuncher (8GeV)
Accumulator (8GeV)
Recycler (8GeV)

}

p

A0

Switchyard

p Target120GeV

F0p

B0

Tevatron(980GeV)for p-bars
E0C0p

Tevatron (980GeV)

pD0Tevatron Status

2001

2002

Initial(peak) Luminosity

Tevatron Run 2 operation started
in March 2001
Present Status
Now achieving typical peak luminosity of2.5 ~ 3 x 1031 cm-2 s-1
100 pb-1 delivered, 70 pb-1 recorded

Luminosity goals for Run 2a
5~8 x 1031 cm-2s-1 w/o Recycler
2 x 1032 cm-2s-1 with Recycler
Integrated luminosity of 2 fb-1

Integrated Luminosity

CDF II Detector
Central Hadron
Calorimeter

Central EM
Calorimeter

SolenoidCentral Muon

* DAQpForward Muon

* Endplug Hadron

NewCalorimeterOldp*Endplug EM
Calorimeter* TOFTracking Chamber* Silicon Detector

PartiallyNew* Japan group contributedin the Run 2 upgradeCDF II Detector (2)Installing Silicon Detectors

Rolling into the Collision Hall

CDF II Tracking

All tracking detectors inside the solenoid are new.
η = 1.0

Solenoid magnet (1.4T)(m)

Drift chamber (Central Outer Tracker, COT)
30k sense wires

2.0

30oSOLENOID

1.5

Silicon detectors (SVXII, ISL, L00)
8 tracking layers(SVXII : 5, ISL : 2, L00 : 1)

1.0COTη = 2.00.5

δpT / pT2fη = 3.0~ 0.1% (|η|<1.0, COT+ISL+SVXII)

3o0~ 0.4% (1.0<|η|<2.0, ISL+SVXII)

0LAYER 00

0.5SVXII

1.0

1.5

2.0

2.5

INTERMEDIATE SILICON LAYERS

3.0(m)

CDF II Tracking (2)Silicon Detectors (ISL)

Central Outer Tracker

x103
x - p3 2

Fit = p0*ep1*|x| + p2*e
5000

1()
2 p4p0p1
p2
p3
p4

SVX Unbiased Residual in Phi= 1.066e+06= -35.16= 4.22e+06= -0.0004904= 0.0175

Entries

6000

Resolution = 175 µm

60504000σ = 175 µm

3000

σ = 11 µm

SVX II

2010000-0.1 -0.08 -0.06 -0.04 -0.02

2-Strip clusters

40302000

CDF Run II
Preliminary

1000.02 0.04 0.06 0.08

0.1

Hit Residuals (cm)0-0.02 -0.015 -0.01 -0.005

00.0050.010.015

0.02cmCDF II Calorimetry

(m)

2.0

CENTRAL EM CALORIMETER

END-PLUG HADRONCALORIMETER

Hadron Calorimeters
Scintillator / Fe sandwich
ps/E ~ 80% / E (GeV)

CENTRAL HADRON CALORIMETER

END-WALL HADRONCALORIMETEREM Calorimeters
Scintillator / Lead sandwich
ps/E ~ 15% / E (GeV)

3.0

END-PLUG EMCALORIMETERNew End-Plug Calorimeters(EM & Hadron, |h| < 3.6)

h = 1.0

1.0

h = 2.0

h = 3.000

1.0

2.0

3.04.0(m)CDF II Muon Detectors(m)Increased φ and η coverage
by about 50%
New forward detectors( 1.0 < |η| < 1.5 )6.0
η = 1.0

4.0

Drift tubes + Scintillation counters
Detectable for pT > 1.4 GeV/c

η = 2.0
2.0

η = 3.000

2.0

4.0

6.0

8.0(m)

Brief History of CDF and TevatronAug. 1981
Oct. 1985
Dec. 1986
Jan. 1987 - May 1987
Jun. 1988 - May 1989

CDF design report− collision (1.6 TeV)First pp
CDF construction completedFirst physics run (1.8 TeV) 0.025pb-1
Run 04.5pb-1

Detector upgrade
Apr. 1992 - May 1993
Dec. 1993 - Feb. 1996

Run 1aRun 1b

19 pb-1
87 pb-1

Detector / Tevatron upgrade (1.96 TeV)
Oct. 2000 - Feb. 2001
Mar. 2001 2005 -Run 2 commissioning
Run 2aRun 2b

CDF Collaboration
North America

EuropeAsia

United States

Italy

Korea

1 Research Lab
6 Universities

3 Universities

3 Natl. Labs
28 Universities

Canada1 University

Germany
1 University

United Kingdom
4 Universities

TotalsRussia11 countries2 Research Labs

58 institutes

Spain

581 physicists

1 University

Switzerland
1 UniversityTaiwan
1 UniversityJapan
5 Universities
1 Research Lab
Univ. of Tsukuba
KEKWaseda Univ.
Osaka City Univ.
Hiroshima Univ.
Okayama Univ.

Z!ee

Events/4 GeV

Reconstruction of high PT electron pairs( Inclusive high-PT central electron trigger : ET > 18 GeV, PT > 9 GeV/c )Central Dielectron Mass70

CDF Run II Preliminary60

sL~10 pb

50
40

-130

Data

20

Pythia Z/ g ! ee

Background+ background

10060

80

100

120

140

160

180
200
Mass/GeVIsolated electron

Isolation (GeV)

Large ET and E/ T

Electron Transverse Energy (GeV)

W!en

80

CDF Run II PreliminarysL = 10 pb-15547 W ! e n Candidates

70605040302020203040506070

Missing Transverse Energy (GeV)80

Isolation vs. Missing Transverse Energy
CDF Run II Preliminary

18s L ~ 10 pb

-1

1614
121086W!enCandidates

4ET = 35 GeV, E/ T = 38 GeV

200102030405060E T (GeV)W ! e n (2)Events per 2 GeV

500
450400350300Transverse Mass
CDF Run IIPreliminarysL ~ 10 pb

Data(5547 W ! e n Candidates)

All Bkgs +Signal Prediction-1

March -W ! e n MC
QCD Bkg

June 2002(from data)

W ! t n MC
*Z/ g ! e+ e- MC

250
200

Cross section measurement (preliminary)s(W).B(W ! en)= 2.60 ± 0.07(stat) ± 0.11(sys) ± 0.26(lum) nb
consistent with Run 1 result(after rescaling for higher CM energy)p
NNLO theory : 2.73 nb ( ps = 1.96TeV)
2.50 nb (p s = 1.8TeV)Run 1 : 2.49 ± 0.12 nb ( s = 1.8TeV)

150
100

W mass is extracted from a fit to transversemass distribution (combined with mn mode).

500405060

708090100 110
M T (GeV)

DM ~ 30MeV/c2 with 2fb-1(competitive to combined LEP2 result : 39MeV/c2)

W and Z measurements with muons
Inclusive high-PT muon trigger sample (PT > 18 GeV/c)

2500

CDF Run II
16 pb

400

events per 2.5 GeV/centries per 3 GeV

Transverse mass of W ! mn-1

preliminary
300

data
all contributions

200

W ! mn25

Invariant mass of Z ! mm
CDF run II
Data

20

preliminary
16 pb

Monte Carlo-1

1510Z ! mm100

W ! tn5QCD
0020406080100120

transverse mass (GeV)

060708090100110120130
2Mm+m- (GeV/c )s(W).B(W ! mn) = 2.70 ± 0.04(stat) ± 0.19(sys) ± 0.27(lum) nb(Run 2 preliminary)Measurements with low pT muons
Di-muon trigger sample (PT > 1.5 GeV/c)

J/y ! mm

U ! mmEvents per 10 MeV/c 2

CDF Run II Preliminary, 28 pb, September 2002

800

J/ Y : Events: 345k, Width: 21 ± 0.1 MeV/c80000

Y (2s): Events: 9.5k, Width: 22 ± 2 MeV/c

70000

2600

29500

Events/50MeV/c

50000

U(1S)

210000

J/y

60000

9000
8500

40000

y(2S)

8000

30000

-1

CDF Run II Preliminary, 17pb

7500

U(2S)

400

U(3S)
200

20000

3.50

3.55

3.60

3.65

3.4

3.5

3.70

3.75

3.80

10000
0
2.8

2.9

3.0

3.1

3.2

3.3

3.6+-

3.7

3.8

Mass ( m m ), GeV/c20
9.0

9.5

10.02mm Mass GeV/c

Large sample of J/y is also utilized for tracking calibration.

10.5

11.0

Measurements of B Massesm(B0) = 5279.8 ± 1.9(stat) ± 1.4(sys) MeV/c2(PDG : 5279.4 ± 0.5 MeV/c2)

Starting to be competitive . . .
2.1(sys) MeV/c2m(Bs0) = 5360.3 ± 3.8(stat) +- 2.9(PDG : 5369.6 ± 2.4 MeV/c2)

B+ ! J/y K+

CDF Run II Preliminary+N(B )=152.7 ± 14.0

25
2030

B0 ! J/y K*0

CDF Run II Preliminary

252(PDG : 5279.0 ± 0.5 MeV/c2)

N(B d)=82.4 ± 11.5

Events/10 MeV/c30m(B+) = 5280.6 ± 1.7(stat) ± 1.1(sys) MeV/c2

Events/5 MeV/c 2

Events/5 MeV/c 2

Cross check of tracking calibration using J/y decay channels

20151510105510B0s ! J/y f

CDF Run II PreliminaryN(Bs)=14.4 ± 4.0

8640
5.0

5.1

5.2+

5.3

5.4

5.5

2

B candidate mass [GeV/c ]

0
5.0

2

5.1

5.2

5.3

5.4

5.5

2

B d candidate mass [GeV/c ]

0
5.1

5.2

5.3

5.4

5.5

5.6

2

B s candidate mass [GeV/c ]B Physics Projections
measurement of sin2b
B0 ! J/y KSs(sin2b) ~ 0.05 with 2 fb-1
B0s - B0s mixing (( unique at Tevatron)
B0s ! Ds p, Ds ppp
CDF sensitivity at 5s for xs < 60(xs = Dms / Gs)

Top Event CandidatebνeW+−qt−tqe+−bWe−−−
νe60ET

402006420e+
ET = 73 GeVe−ET = 56 GeV
Jet 1
ET = 35 GeV
Jet 2
ET = 34 GeV
METET = 43 GeV
M(e+e−) = 118 GeV

η

-2-4-6300

1002000φ−
800 t t events with b-tagging are expected with 2 fb-1

[pb]Higgs at the Tevatron
10 2_s(pp!hSM+X) [pb]ps = 2 TeV

10gg!hSM

110101010CTEQ4M-1qq!hSMqq-2-3

Low-mass SM Higgs ( ~ 130GeV/c2)

Mt = 175 GeV____gg,qq!hSMtt

qq' ! Wh ! `nbb

_qq'!hSMW__bb!hSM
qq !hSM Z- - qq! Zh ! `+`-bb, nnbb

gg,qq!hSMbb

-480

100

120

140
MhSM

bb

160

180

[GeV]

WW

200

High-mass SM Higgs (130GeV/c2 ~ 190GeV/c2)
gg ! h ! W*W* ! `+`-nnqq' ! Wh ! `±nW*W* ! `±n`±n j j

qq! Zh ! `±`+W*W* ! `±`+`±n j j

Higgs at the Tevatron (2)LEP excluded

For mh < 120 GeV/c2,can be excluded with 2 fb-1,
if not there
3 σ evidence with 7 fb-1
5 σ discovery with 15 fb-1

ps = 1.96TeVs(W), s(Z) ~ 10% highers(t t) ~ 30% higher

With 2 fb-1 (Run 2a)
DMW ~ 30 MeV/c2
DMtop < 3 GeV/c2~) D(log MH) ~ log 2(1/2 MH < MH < 2MH)

With 15 fb-1 (Run 2b)
DMW ~ 20 MeV/c2
DMtop ~< 2 GeV/c2) D(log MH) ~ log 1.3

MW (GeV/c2)

Top / Electroweak Projections

80.6100250
500010080.580.4

CDF RUN-IIa

80.3280.2
sasM80.1130)
c/eVG(sggiH140150

MW-Mtop contours : 68% CL

160170180 190 200
Mtop (GeV/c2)

Tevatron Plan and Luminosity Prospects
Run 2a2002
Expect to maintain peak luminosity in the range 2.5 ~ 4 x 1031 cm-2s-1
Expect a delivered integrated luminosity of ~ 150 pb-1 in 2002
2003
Six-week shutdown ( in January ? )Complete Recycler work
No major shutdown for rest of 2003
Commission and integrate Recycler
Expect peak luminosity of 4 ~ 6 x 1031 cm-2s-1
Run 2a goal
Typical peak luminosity of 2 x 1032 cm-2s-1
Integrated luminosity of 2 fb-1 over 2 ~ 3 year periodTevatron Plan and Luminosity Prospects (2)Run 2bIncrease anti-proton intensity by a factor of 3
Peak luminosity up to 4 x 1032 cm-1s-1
Silicon detector replacement at CDF and D0/ (6-month shutdown in 2005)(Japan group is contributing to Run 2b silicon detector (SVXII-b) at CDF)
Integrated luminosity of 15 fb-1 during ~4-year running ( ~ 2008)

Summary

Fermilab accelerators and collider detectors were successfully upgraded.
Run 2 started in March 2001.
Collider detectors are working well.
−We are accumulating physics data of pp collisions. Data analyses are alsoin progress. Some preliminary results were presented.
Luminosity of Tevatron is being improved. Hopefully, integrated luminosityof ~ 150 pb-1 in 2002, 2 fb-1 in 2 ~ 3 years, 15 fb-1 in ~2008.