CDF?????

1
CDF????????
? ?? ???????? For the CDF Collaboration
???? CDF????? CDF????? CDF????????
2
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1900?
2000?
17???? ????
19???? ????
1881? ?????????? ??????????????
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1896? ????????? 1897? ????????
4
??????????(?????????)

?????????(??????)
????
?? 2/3 - 1/3 - 1 0
???(0.002) ????(1.3) ???(175 ) ???(0.005)
?????(0.14) ???( 4.2)
????
??(0.0005) ?????(0.106) ??????(1.8) ????????
????????? ????????
???????(??????)
???
????
???
( )?????GeV? ?????????
????(0) ??(0) W??(80)
Z??(91)
5
?????(??????)
?????????? V (f) m2f2 /2 lf4 /4 ( l????
m2 gt 0 (???????) ??????(??????) ???????
?m2 lt 0 (??)
6
????? ????(???????????)??????????????????????????
???????????????????????????????????????
?????? ??????????(???)???????????(??????)????????
??????????????????????????????????????
????????????????????????????????150GeV/c2?????????
??????????????????????K????t???B????????????
7
?????????????
CDF
????? ?????? ???????????
?????? ??????
8
???????????????
???????????? (??) FERMILAB
??????????(?) CERN
?????????????(??) KEK
???????????? ???(??) BNL
???????????????(??) SLAC
(?????????)
9
2TeV?????????(CDF??)??????????????????????
RunI (19921996) s 1.8 TeV ( 110pb-1
) RunII(2001) s 1.96 TeV Main
Injector ( 9fb-1 ???)
v
CDF
Tevatron Ring
v
Main Injector
10
CDFII Detector
11
Drift Chamber
Muon System
Central Calor.
New
Solenoid
Old
Partially New
Time-of-Flight
Plug Calor.
????????? ???????????(????)
????KEK????????????????????UCLA????????????????
SVX?(??) ????????????????????LBNL??????????????
??????? ISL (????) ???????????????????LBNL??????
???????????? DAQ(????????) ????KEK????????????
MIT???????????TOF????? (??) ???????????????????
?
Muon
Silicon Microstrip Tracker
Front End Electronics Triggers / DAQ
(pipeline) Online Offline Software
12
???? ????????????????????????????????????????????
??????? ???? ???(???) qq
p,K,?, ???(????) qqq p, n,
?,S,
13
(No Transcript)
14
CDF???????????

• ?????????(??????????????)

1981?8? CDF????? 1985?10? ???????? 1987?
????? 1988?6? ????(Run0) 1989?5?
1992?4? ????(Run1) 1996?2? 1994?
????????? 1998? Bc????? 2001?4?
????(Run2)?? ????????????????????
??????????B????CP???? ??????????????
15
????????
CDF?? ???? (??10???26?) ?? ? Top-Quark
Search in the Dilepton Channel in 1.8-TeV
Proton-Antiproton Collisions (1994.2) PRL 73
(1994) 225 citation 527 PR D50 (1994) 2966
citation 631 ?? ??? Measurement of the Cross
Section for Charmed Meson Production Associated
with a Prompt Photon in 1.8 TeV
Proton-Antiproton Collisions (1995.1) PRL 77
(1996) 5005 citation 6 ?? ?? Measurement of
Neutral B Meson Mixing in Electron-Muon Events in
1.8-TeV Proton-Antiproton Collision
(1996.1) ?? ?? Properties of High-Mass Multijet
Events at the Fermilab Proton-Antiproton
Collider(1996.2) PR D54 (1996) 4221 citation
23 ?? ?? Search for Chargino-Neutralino
Production in 1.8-TeV Proton-Antiproton
Collisions (1996.9) PRL 76 (1996) 4307 citation
33 ? ??? Search for New Neutral Gauge Bosons in
1.8-TeV Proton-Antiproton Collisions
(1996.9) PRL 79 (1997) 2192 citation 110 ??
?? Observation of Subclusters Within Jets
Produced at the Fermilab Tevatron
Proton-Antiproton Collider (1997.1) ??
? Measurement of the Photon Angular Distribution
in the WPhoton Production in 1.8 TeV
Proton-Antiproton Collisions (1997.1) ?? ? A
Measurement of Top Quark Mass and Kinematics
Properties in Fermilab 1.8-TeV
Proton-Antiproton Collisions (1997.1) PRL 80
(1998) 2525 citation 65 PRL 80 (1998) 5720
citation 9 ?? ? Measurement of the Cross Section
for Diphoton Production in 1.8 TeV
Proton-Antiproton Collisions (1997.2)
PRL 81 (1998) 1791 citation 50 ??
?? Measurement of W-Photon and Z-Photon Couplings
in 1.8-TeV Proton-Antiproton Collisions
(1997.6) ?? ?? Observation of the Bc Meson in
1.8-TeV Proton-Antiproton Collisions
(1998.1) PRL 81 (1998) 2432 citation 117 PR
D58 (1998) 112004 citation 116
16
CDF?? ???? (??10???26?)???
?? ?? Measurement of Time Dependent B0 B0 Mixing
in 1.8-TeV Proton-Antiproton Collisions
(1997.6) PR D60 (1999) 112004 citation 17 ??
?? Measurement of the Strong Coupling Constant
from Two Jet Production Cross Section in
1.8-TeV Proton-Antiproton Collisions
(1998.1) ?? ?? Observation of Diffractive Bottom
Quark Production in 1.8-TeV Proton-Antiproton
Collisions (1999.1) PRL 84 (2000) 232
citation 39 ? ?? Measurement of the W Boson
Transverse Momentum Distribution in 1.8 TeV
Proton-Antiproton Collisions (1999.1) ??
?? Search for Technicolor Particles in 1.8-TeV
Proton-Antiproton Collisions (1999.1) PRL 84
(2000) 1110 citation 10 ?? ?? Search for Single
Top Quark Production in 1.8-TeV Proton-Antiproton
Collisions (1999.12) PRD 65 (2002) 091102
citations 24 ?? ?? Observation of Dijet
Production by Double Pomeron Exchange in 1.8-TeV
Proton-Antiproton Collisions
(2000.1) PRL 85 (2000) 4215 citation 58 ??
?? Measurement of the Diffractive Structure
Function of the Antiproton in 1.8-TeV
Proton-Antiproton Collisions (2001.1) PRL 88
(2002) 151802 citations 15 ?? ?? Search for
Radiative B -Hadron Decays with the Collider
Detector at Fermilab (2001.1) PRD 66 (2002)
112002 ?? ?? Measurement of the Cross Section
and Heavy Quark Composition of gamma mu Events
Produced in ppbar Collisions at vs 1.8
TeV (2002.9) PRD 65 (2002) 012003 citations 1
?? ?? Search for Scalar Top Quark
Pair-Production by R-Parity Violating Decay Mode
in ppbar Collisions at vs 1.8 TeV
(2002.9) ?? ?? Search for W-boson Pair Production
in the Lepton Jet Channel in 1.8-TeV
Proton-Antiproton Collisions (2003.4) ??
?? Search for New Neutral Gauge Bosons in
1.96-TeV Proton-Antiproton Collisions (2004.1) ??
?? Tests of Enhanced Leading Order QCD in W Boson
plus Jet Production in 1.96-TeV
Proton-Antiproton Collisions (2004.1)
17
Tevatron Status
2002
2004
2003

• Run I(19921996)
• Record Luminosity 2x1031 cm-2sec-1
• Integrated Luminosity 110 pb-1 on Tape
• Run II(2001)
• 1 x1032 cm-2sec-1 (July 2004)
• (Weekly Integrated Luminosity 18 pb-1 )
• Integrated Luminosity 670 pb-1
• 540 pb-1 on Tape
• 350 pb-1 analyzed
• Schedule
• 2 fb-1 (by spring of 2006)
• 9 fb-1 (by the end of 2009)

Initial Luminosity
Record 1 x1032 cm-2s-1
2004
2002
2003
Total
670 pb-1
Integrated Luminosity
Weekly record 18 pb-1
18
RunII Projected Integrated Luminosity(DOE
review on Feb.24,2004)
Integrated Luminosity (fb-1)
April 06 2fb-1
Oct. 09 8.5fb-1
Now
Integrated Luminosity per Week (pb-1)
x
We are here now
19
RunII Projected Integrated Luminosity(DOE review
on Feb.24,2004)
Middle of 2007 ?ms 24ps-1(5s)
Spring of 2006 ?MHiggs 30 MHiggs lt120GeV
(95CL) ?ms 18ps-1(5s)
Now
End of 2009 MHiggs lt180GeV (95CL)
20
Physics Results from Run2

• 
  published papers
  submitted papers
• ElectroWeak Physics
  0 3
• New Particle Search
  0 4
• QCD
  0 0
• Top Physics
  1 3
• B Physics
  4 2
• Published papers
• Ds, D mass difference PRD68, 072004 (2003).
• Search for D ?µµ PRD68, 091101 (2003).
• Prompt Charm Cross Section PRL 91, 241804
  (2003).
• Observation of X(3872) PRL 93, 072001 (2004).
• Measurement of the tt-bar Production Cross
  Section Using Dilepton Events PRL. 93, 142001
  (2004).

list
21
WZ??????? e, µ?????
sZ Br(Z?ee-) 267.0 6.3 15.2 16.0 pb
stat.
syst. lumi.
sZ Br(Z?µµ-) 246 6 12 15 pb
stat. syst.
lumi.
?WB(W?µ?) 2.64 ? 0.02 ? 0.12 ? 0.16 nb
stat syst
lum
sW Br(W?e?) 2.64 0.01 0.09 0.16 nb
stat. syst.
lumi.
22
WZ??????? t?????

• Look for jet within narrow 10 degree cone
• Isolated within wider 30 degree cone
• pT(?) gt 25 GeV
• ETmiss gt 25 GeV
• Ncand 2345
• sW Br(W? ??) 2.62 0.07 0.21 0.16 nb
• stat.
  syst. lumi.

Z0?teth
W?t?

• We have a clear Z0?teth signal.
• Further study of backgrounds is underway.

Not only interesting as an EWK measurement, it is
important for Higgs and SUSYsearches.
????(????)???????
23
WZ????????(Run?)
????????(????)????
Sample Back. ?B(W--gtl?l) (nb)
e 38625 6 2.640.01stat0.09sys0.16lum
? 21599 11 2.640.02stat0.12sys0.16lum
? 2346 26 2.620.07stat0.21sys0.16lum
Sample ?B(Z--gtll) (pb)
e 1830 2676stat15sys16lum
? 1631 2466stat12sys15lum
Background 0.5
?B(W--gtl?) and ?B(Z--gtll) at ECM2TeV are
consistent with standard model prediction.
R 10.54 ? 0.18stat ? 0.33sys ? G(W) 2.15 ?
0.04stat ? 0.07sys GeV

consistent with S.M. prediction of 2.09 GeV
24
W? ?????
????(???)??????? Study of W? production with
W?µ? at CDF in Run II

• Require central ?
• ET(?) gt 7 GeV
• ?R(l-?) v(??2?F2) gt0.7

133 seen 141 expected
W?
s Br 17.2 2.2 (stat.) 2.0 (syst.)
1.1(lumi.) pb
Cross sections and photon ET spectra are
consistent with SM.
25
WW ?????
Higgs, SUSY Search

• isolated lepton pair
• opposite-charge, high pT
• ETmiss
• Z veto
• veto events with jets
• ?L 126 pb-1
• 5 events seen
• (5 with 1.2 0.3 BG events
• in Run I _at_ ?L 108 pb-1)
• 9.2 events expected
• (2.3 background, 6.9 1.5 W W ? l? l?)

26
Z Search
????(????)???????
Z?ee -, m m-???????????????
em combined
Run Lum.(pb-1) Mass Limit (95 CL)(GeV/c2)
Run1a (1.8TeV) 19.7 505
Run1b (1.8TeV) 90 640
Run2(1.96TeV) 72 650
Z search history (e e- mode)
27
W jets Analysis
????(???)????

• First result in Run II. (72pb-1 )
• Presented in EPS 03, Aachen.
• Theoretical calculation was
• made by GRACE system.
• Jet Definition
• Et gt 15 GeV , JetClu (R0.4)
• New features
• Parton-jet matching.
• Kinematic distributions were
• a good agreement with data.

28
Jet Multiplicity in b-tagged Wjets events
top signal region
29
Summary of t t ProductionCross Section Results
30
t t Cross Section vs-Dependence
31
?????????????????
????(????)?????? ??????(????)???DLM??
?????????2TeV?????????????????????(????????????)
???????? ???????????4??????(?1??b???????)????22
?????? ????????????????Dynamical Likelihood
Method (DLM)????? DLM ??????????????????????????
???????????????????????
??????????????????
32
?????????????????
????(???)??????
CDF RunII preliminary, 162 pb-1
Data 68 events
Jet probability ???????????4?????????2????????????
???????????11?????? ??????????????????? ?????DLM
????????????????????
33
????????W?????????????????????
??????? Run I??? Mtop 174.3 5.1
GeV/c2 (??Mtop 178.0 4.3 GeV/c2 ) MW
80.452 0.062 GeV/c2
Run II
??????????????? ????? MHiggs lt 219GeV
(??251 GeV) _at_95CL
Run? 2 fb-1(2006??) ?Mtop lt 3 GeV/c2 ?MW
30 MeV/c2 ? ?MHiggs 30
34
J/????????
???? ????(???)????
J/??????????
???
QCD????
RunII??(2001?)?J/??? ??????? PT gt 0 GeV
???? ???? PT gt 5GeV?????RunI???? ???? PT lt
5GeV??????????? ??????
QCD?????50????J/???????RunI??(1996?)?????????Col
or Octet???????????????????????????
35
B?hh?

• charmless two-body decays
• longer term Bs modes help extract unitarity angle
  ?
• Signal is a combination of
• B0???? BR5x10-6
• B0?K?? BR2x10-5
• Bs?KK? BR5x10-5
• Bs??K? BR1x10-5
• Requirements
• Displaced track trigger
• Good mass resolution
• Particle ID (dE/dx)

?(4s),Tevatron

Tevatron
??? hypothesis
36
BR(Bs?KK?)
Fitted contributions
mode Yield (65 pb-1)
B0?K? 148?17(stat.)?17(syst)
B0??? 39?14(stat.)?17(syst)
Bs?KK 90?17(stat.) ?17(syst)
Bs?K? 3?11(stat.) ?17(syst)
First observation of Bs?KK? !! Result Measure
ACP
37
Bs Yields CDF Bs?Ds?
Bs?Ds?? with Ds ??? and ??K?K
BR(Bs ? Ds p?) ( 4.8?? 1.2?? 1.8?? 0.8?? 0.6)
?10-3
(Stat) (BR) (sys) (fs/fd)
New measurement ! Previous limit set by OPAL BR
(Bs ? Ds p? ) lt 13
BR result uses less data than shown in plot.
38
Measuring Bs Oscillation

• Bs reconstruction
• e.g.
• Flavor tagging ( Bs or Bs at the time of
  production?)
• Tagging dilution D1-2w
• Tagging power proportional to ?D2
• Proper decay time
• Crucial for fast oscillations (i.e. Bs)

Typical power (one tag) ?D2 O(1) at
Tevatron ?D2 O(10) at PEPII/KEKB
uncertainty
39
Flavor Tagging

• Strategy use data for calibration (e.g.
  B??J/?K?, B?lepton)
• know the answer, can measure right sign and
  wrong sign tags.

• Results
• Same-side (B) ?D2(2.1?0.7)
• (B/B0/Bs correlations different)
• Muon tagging ?D2(0.7?0.1)

same-side tagging
40
CDF Bs Sensitivity Estimate
hadronic mode only

• Current performance
• S1600 events/fb-1 (i.e. ?effective for
  producetriggerrecon)
• S/B 2/1
• ?D2 4
• ?t 67fs
• surpass the current world average
• With modest improvements
• S2000 fb (improve trigger, reconstruct more
  modes)
• S/B 2/1 (unchanged)
• ?D2 5 (kaon tagging)
• ?t 50fs (event-by-event vertex L00)
• ?ms24ps-1 covers the expected region
  based upon indirect fits.
• This is a difficult measurement.
• There are ways to further improve this
  sensitivity

2? sensitivity for ?ms 15ps-1 with 0.5fb-1 of
data
5? sensitivity for ?ms 18ps-1 with 1.7fb-1 of
data 5? sensitivity for ?ms 24ps-1 with 3.2fb-1
of data
41
???Bc??????????
µµ?J/????????????????????????µµ?p?????????? ?????
Gaussian????Background?Fit????? 18.95.7??????????
(3.5s)?
Bc??????????????
?????? 630717 MeV/c2(QCD)?630412 18/-0 MeV/c2
(unquenched latticeQCD)
Bc?????????????????????? ????(???)??????
42
???????????????

• CERN???(?????)?LEP2???????????????????????????????
  ????????????????(CDF??)?????????

43
?????????
???????? ( MH lt 150GeV/c2)
????????
_ bb
????? ?????
???????? ( MH gt 150GeV/c2)
????????
WW-
?????????
44
??????????????
????(???)??????
???WH ???????????W????Higgs??? ???????????2????
??(?1??b???????)????????????????62?????? ?????2???
????????? Wbb???????????????? 66.59.0???????????
????????????????????? ???????????????????
??????2???????????
45
??????????????
???????Higgs???2??W?????????2?????????????????????
????8?????? W?????????????????8.900.98??????????
???????????????????????????????????????????????
?????????
46
??????????????????
???????????????? MH(GeV/c2 ) (95?????????MH )
100 150
200
????(RUN2a)

• 2001?12?
• 2005?12?
• 2009?12?

LEP 2 ? ??????
????????? ???????????
47
???CDF??RUN2(2001?)?????????????

• 2006????ms 18ps-1 ????5s?Bs mixing????????
• ??2??????t t?l?4???? ????1000?????????Mtop
  3GeV/c2?Mtop???????????MW 30 MeV/c2?MW??????????
  ???MH0.3MH ???????????????????
• ??2??????
• 95???? MH lt 120GeV/c2????????????
• ???3????????????
• 95???? MH lt 180GeV/c2????????????

48
BACKUP
49
The CDF Collaboration
North America
Europe
Asia

3 Natl. Labs 28 Universities 1 Universities
1 Research Lab 6 Universities 1 University 4
Universities 2 Research Labs 1 University 1
University
5 Universities 1 Research Lab 1 University 3
Universities

• Totals
• 112 countries
• 58 institutions
• 581 physicists

50
Run2 Paper
1. Measurement of the Mass Difference m(Ds) -
m(D) at CDF II D. Acosta et al.,
Phys. Rev. D68, 072004 (2003). 2. Search for
the Flavor-Changing Neutral Current Decay D0 -?
µµ- in p anti-p Collisions at s(1/2) 1.96
TeV D. Acosta et al., Phys. Rev.
D68, 091101 (2003). 3. Measurement of Prompt
Charm Meson Production Cross Sections in p anti-p
Collisions at s(1/2) 1.96 TeV D.
Acosta et al., Phys. Rev. Lett. 91, 241804
(2003). 4. Observation of the Narrow State
X(3872) ? J/?pp- in p anti-p Collisions at
s(1/2) 1.96 TeV submitted to Phys.Rev.Let
51
?b??c? with ?c?pK?

• Backgrounds real B decays
• Reconstruct p as p Bd ? D?p?Kp?p?p
• Use MC to parametrize the shape.
• Data to normalize the amplitude
• Dominant backgrounds are real heavy flavor
• proton particle ID (dE/dx) improves S/B

Fitted signal
New Result !
BR(Lb ? Lc p?) (6.0 ?1.0(stat) ? 0.8(sys) ?
2.1(BR) ) x 10-3
52
Detector PerformanceSVX

• Silicon detectors
• Typical S/N 12
• Alignment in R-f good
• R-z ongoing

Details
53
Full silicon acceptance is in sight The last
10 of the job takes the second 90 of the effort
(but not time!)

• Commissioning
• L00 gt 95
• SVXII gt 90
• ISL gt 80
• ISL completing cooling work

of silicon ladders powered and read-out by
silicon system vs. time
Back Back to index
54
Detector PerformanceTOF

• TOF resolution within 10 20 of 100ps design
  value
• Improving calibrations and corrections

S/N 1942/4517
TOF
S/N 2354/93113
55
Detector PerformanceXFT
Efficiency curve XFT cut at PT 1.5 GeV/c
Offline track
XFT track

• XFT L1 trigger on tracks
• full design resolution
• DpT/p2T 1.8 (GeV-1)
• Df 8 mrad

56
Detector PerformanceSVT
8 VME crates Find tracks in Si in 20 ms with
offline accuracy
Online track impact param.
s48 mm
90

• Secondary VerTex L2 trigger
• Online fit of primary Vtx
• Beam tilt aligned
• D resolution as planned
• 48 mm (33 mm beam spot transverse size)

Efficiency
soon
80
57
EM Calorimeter scale

• 638 Z ? ee- in 10 pb-1
• s(M) 4 GeV
• Check Z mass in data and simulation after
  corrections
• Central region
• Mean 1.2 data, -0.6 sim.
• Resolution 2 simulation
• Forward region (Plug)
• Mean 10/6.6 data, 2.0 simulation
• Resolution 4 simulation

NZ 247
FB asymmetry
Central-central
Central-West plug
Central-East plug
NZ (WE) 391
58
Measurements with high Et e

• Good modeling of observed W? en distributions

Selection details
MET resolution from MB data consistent with Run 1
MET detail
59
Reconstruct Z ? ee measure AFB

• Both e? ?gt1
• NZ(PP) 160

Uses silicon to tag e charge
Both e? ?lt1 NZ(CC) 247 s(M) 4 GeV
Central-Plug Dielectron Mass
One ?lt1, one ?gt1 NZ(CP) 391
AFB will be an additional handle in Z searches
60
High-Pt muons Z? mm-

• Clear Z? mm- signal
• require COTCMUCMP
• CDFs purest muons 8l

m1
CMU
m2
CMP
57 candidates 66ltMlt116 GeV NZ 53.27.5 2.7
61
Measure sB(W?en)
0.16 soon!

• W cross section
• sWBR(W?en) (nb)
• 2.600.07stat0.11syst 0.26lum

Background (8) - QCD 260 34 78 - Z ?ee
54 2 3 - W?tn 95 6 1
5547 candidates in 10 pb-1
62
Measurement of sB(W?mn), R
4561 candidates in 16 pb-1 (require
COTCMUCMP) 12.5 background - Z ?mm 247
13 - W?tn 145 10 - QCD 104
53 - Cosmics 73 30

• sB(W?mn) 2.70.04stat.19syst .27lum

Many uncertainties, e.g. lumi, cancel in ratio
R sB(W?mn) / sB(Z?mm) 13.661.94stat1.12sys
t (1.5s from SM) ? G(W) 1.670.24stat0.14syst
MT
Measure a precisely predicted ratio ? establish
tight feedback loop on muon detection,
reconstruction, and simulation
63
W ? t n

• Evidence for typical t decay multiplicity in W? t
  n selections
• t channel important for new physics searches

64
Measurements with jets

• Raw Et only
• Jet 1 ET 403 GeV
• Jet 2 ET 322 GeV

Jet expectations Raw jet distributions
65
Hadronic Energy Scale

• Use J/y muons to measure MIP in hadron
  calorimeters
• (Run II)/(Run 1) 0.960.05

q
g
g
q

• Gamma-jet balancing to study jet response
• fb (pTjet pTg)/pTg
• Run Ib (central) fb -0.1980 0.0017
• Run II (central) fb -0.2379 0.0028
• Plug region corrections in progress

D fb (4.0 0.4)
66
Measurements with jets

• Jet shapes
• Narrower at higher ET
• Calorimeter and tracking consistent
• Herwig modeling OK

16 pb-1 used for this study
67
Measurements with low Et m

• y trigger improved
• pTm gt 2.0 ? 1.5 GeV
• Df gt 5 ? 2.5
• Observed y rates are consistent with expected
  increase due the lowering of the thresholds

13 pb-1
No Silicon 100k y
Centralmuons only
15 MeV with Silicon
s 21.6 MeV
68
Material Momentum Calibration

• Use J/ys to understand E-loss and B-field
  corrections
• s(scale)/scale 0.02 !
• Check with other known signals

D0
confirm with g?ee
U
1S
2S
3S
mm
69
Meson mass measurements

• B masses
• y(2S)?J/y pp- (control)
• Bu? J/y K
• Bd? J/y K0 (K0?Kp-)
• Bs? J/y f (f?KK-)

18.4pb-1
Bs?J/yf
More mass plots
CDF 2002 DPDG/s y(2S) 3686.43 0.54
0.9 Bu 5280.6 1.7 1.1 0.8 Bd 5279.8
1.9 1.4 0.2 Bs 5360.3 3.8
-2.1
B??J/yK?
18.4pb-1
Bu
2.1 2.9
70
B hadron lifetimes

• Inclusive B lifetime with J/ys
• Fit pseudo-ct LxyyFMCMy/pTy ct45810stat.
  11syst. mm
• (PDG 4694 mm)
• Exclusive B?J/yK lifetime
• ct446 43stat. 13syst. mm
• (PDG 5025 mm)

J/y from B 17
B? 154
71
Trigger selects Bs via semileptonic decays ...
1910?119 candidates
349?22 candidates
Run II trigger silicon gt 3?
yield/luminosity as in Run I (and likely to
improve further with optimization)
72
SVT selects huge charm signals!

• L2 trigger on 2 tracks
• pt gt 2 GeV
• D gt 100 mm (2 body)
• D gt 120 mm (multibody)
• Large charm samples!
• Will have O( 107 ) fully reconstructed decays in
  2fb-1 data set
• FOCUS todays standard for huge 139K D0?K-p,
  110K D?K-pp
• A substantial fraction comes from b decays (next
  slide)

56320 D0
25570 D
73
Measure Ds, D mass difference
11.6 pb-1

• Ds - D mass difference
• Both D ? fp (f?KK)
• Dm99.280.430.27 MeV
• PDG 99.20.5 MeV
• (CLEO2, E691)
• Systematics dominated by background modeling

2400 events
1400 events
Brand new CDF capability
74
Measure Cabibbo-suppressed decay rates

• G(D?KK)/G(D?Kp) (11.170.480.98) (PDG
  10.830.27)
• Main systematic (8) background subtraction
  (E687, E791, CLEO2)
• G(D?pp)/G(D?Kp) (3.370.200.16) (PDG
  3.760.17)
• several 2 systematics
• This measurement has pushed the state of the art
  on modeling SVT sculpting--essential simulation
  tools for both B physics program and e.g. high-pT
  b-jet triggers

Already comparable!
Future? - CP violation - mixing - rare decays
Monster Kp reflection here ...
75
??????(????)????????????
?????
?????x???
76
CDF Run I VH searches ( 106 pb-1)
Expect 600 events Observe
580 events
Expect 30?5 st 6.0?0.6 dt Observe
36 st 6 dt
Expect 3.2?0.7 st Observe 5
Expect 39.2?4.4 st 3.9?0.6
dt Observe 40 st 4 dt
77
VH Production Cross Section Limit
95 CL Limit is about 30 times higher than SM
prediction for Mhiggs 115GeV/c2.
78
??????????????
Muon
Jet1 (b-tagged)
Jet4
Jet2
Jet3 (b-tagged)
Muon Missing ET 4Jets event(with 2b-tagged
jets)
79
?????????????
?????????56.43.4 pb-1 ??????????????(b-???????
W3,4??????) 15???? ??????????? 4.30.5 ??
Wbb, Wcc, mistag 2.30.3 Wc
0.40.1 non-W
1.00.4 WW, ZZ, Z?tt 0.20.05
single top 0.40.1
s(t t) 5.51.9(stat) 0.8(syst) pb ????? 6.5
pb
80
B Hadron Lifetimes

• All lifetimes equal in spectator model.
• Differences from interference other
  nonspectator effects
• Heavy Quark Expansion predicts the lifetimes for
  different B hadron species
• Measurements
• B0,B lifetimes measured to better than 1!
• Bs known to about 4
• LEP/CDF (Run I) ?b lifetime lower than HQE
  prediction
• Tevatron can contribute to Bs, Bc and ?b (and
  other b-baryon) lifetimes.

Heavy Flavor Averaging Group http//www.slac.stanf
ord.edu/xorg/hfag/index.html
81
B, B0 Lifetimes in J/? Modes
?(B0)
1.63 ? 0.05(stat.) ? 0.04 (syst.) ps
?(B)

• Trigger on low pT dimuons (1.5-2GeV/?)
• Fully reconstruct
• J/?, ?(2s)????
• B? J/?K
• B0 ? J/?K, J/?Ks
• Bs ? J/??
• ?b? J/??

• 1.51 ? 0.06(stat.) ? 0.02 (syst.) ps

Proper decay length
82
Bs Lifetime
Bs?J/? F with J/??µµ- and F?KK- B? J/?K, B0
?J/?K0 check technique, systematics

83
?b ??????

• ?b?J/?? (J/????? , ??p?? )?????????
• ????? LEP/CDF ???????b??cl????

65 pb-1
46?9 signal

First lifetime from fully reconstructed ?b decay!

• ??? ??? ????(???)???????

84
B Hadron Masses

• Measure masses using fully reconstructed B?J/?X
  modes
• High statistics J/????? and ?(2s)?J/???? for
  calibration.
• Systematic uncertainty from tracking momentum
  scale
• Magnetic field
• Material (energy loss)
• B and B0 consistent with
• world average.
• Bs and ?b measurements are worlds best.

85
RunII???????????
?????? ?????????????????????8?????????3??2008?????
???????????????????? ???????????????????????????
????????5GeV?????? ?????? LHC???????????????CDF?
??? ???????????????????????????????????
????????????????????????? ?????????????????????
?????????????? ???????????????????????????????????
? ???????
86
New Particle decaying to J/?pp?

• Belle observes narror state
• final state J/?pp?
• exclusive B ?J/?pp? K
• 35.7 6.8 events
• possibly charmonium
• mass is unexpected
• shown August 12, 2003

• CDF confirms this September 20
• final state J/?pp?
• mostly prompt prodction
• 70986 events