? ???????????????(CDF??)

1
???????????????????????
? ?? ??????????????????
????????(??????) 2004?7?28?
? ???? ? ???????? ? ???????????????(CDF??)
?????????? Bc?????? ? ?????????
2
??????

??
???
??
??
????
3
????????
1900?
2000?
17???? ????
19???? ????
1881? ?????????? ??????????????
???
??????
????
1896? ????????? 1897? ????????
4
?????????

• ?BC4c. ??????????????A-TOM?????????????
• ?????????????????
• 19?20c?? ????????????????
• 1897??????(J.J.Thomson)
• 1905??????(A.Einstein)
•  ?????(M.Planck, N.Bohr)
• 1911???????????(E.Rutherford)
• 1913??????(A.Einstein)
• 1913??????(E.Rutherford)
• ????(W.Heisenberg, E.Schrodinger, P.Dirac)
• 1932???????(J.Chadwick)
• 1933???????(C.Anderson)
• 1935?????(????)
• 1937?µ?????(C.Anderson)

1900
1950
5
?????????
20c??1947??p??????????????????(????????)?? 1956?
?e???(F.Reines) 1956???????(O.Chamberlain,
E.Segre) 1956???????????(T.D.Lee,
C.N.Yan) 1962??µ???(L.Lederman, M.Schwartz,
J.Steinberger) 1964???????(M.Gell-Mann,
G.Zweig)SU(3)3??? u, d, s???? 1964?CP?????????(J.
Cronin, V.Fitch) 1967??????? (S.Weinberg,
S.Glashow, A.Salam)QCD???????(1973?) 1969??????
?(R.Feynman) 1969????????????????????
(J.Friedman, H.Kendall, R.Taylor) 1971?Yang-Mills
??????????? (G.t Hooft) 1974? ???c???????
(S.Ting, B.Richter) 1976?t???(M.Perl) 1976?
???(Gargamelle Group) 1977??(
)???b???????(L.Lederman) 1980????????????(at
PETRA)
1950
1960
1970
1980
6
CDF??? ?????????
1979?CDF???????? 1981?CDF??????? 1983?W,
Z?????? (UA1, UA2) 1985?CDF?????????????? 19
87?CDF????(Engineering Run) ?????W??? 1988?CDF
??Run 0(Physics Run) ?1989? W,
Z????b????????? 1992?CDF??Run
I ?1996? 1991????????3 (SLC,
LEP) 1994??????????? (CDF) W????????????
???????? b-?????????? BC??????(1998?)
1980
1990
2000
7
??????????(?????????)

?????????(??????)
????
?? 2/3 - 1/3 - 1 0
???(0.002) ????(1.3) ???(175 ) ???(0.005)
?????(0.14) ???( 4.2)
????
??(0.0005) ?????(0.106) ??????(1.8) ????????
?e ????????? ?µ ???????? ?t
???????(??????)
???
????
???
( )?????GeV? ?????????
????(0) ??(0) W??(80)
Z??(91)
8
?????(??????)
?????????? V (f) m2f2 /2 lf4 /4 ( l????
m2 gt 0 (???????) ??????(??????) ???????
?m2 lt 0 (??)
9
????? ????(???????????)??????????????????????????
???????????????????????????????????????
?????? ??????????(???)???????????(??????)????????
??????????????????????????????????????
????????????????????????????????150GeV/c2?????????
??????????????????????K????t???B????????????
10
?????????????
CDF
????? ?????? ???????????
?????? ??????
11
???????????????
???????????? (??) FERMILAB
??????????(?) CERN
?????????????(??) KEK
???????????? ???(??) BNL
???????????????(??) SLAC
(?????????)
12
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
13
CDFII Detector
14
Muon System
Central Calor.
New
Solenoid
Old
Partially New
Muon
Plug Calor.
Time-of-Flight
Drift Chamber
Silicon Microstrip Tracker
Front End Electronics Triggers / DAQ
(pipeline) Online Offline Software
15
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????
????????????????????????? ??????????
16
(No Transcript)
17
(No Transcript)
18
??????????
1977????????????????????????????????????????
1978?1986? PETRA( 46.8GeV?????????) at
DESY(?) 1980?1990? PEP( 30GeV?????????) at
SLAC (?) 1981?1990? SppS( 630GeV?????????)at
CERN (?) 1987?1995? TRISTAN( 64GeV?????????)
at KEK (?) 1987? TEVATRON(
1.8TeV?????????) at Fermilab (?)
19
CDF???????( Design Report )
????? 90?
20
CDF??????????????????
?????????????????8???
21
(No Transcript)
22
SVX b-tag 2 events
180
??????Top mass
100
23
SVX b-tag 2 events
24
CDF???????????????
? Dilepton ????? t t ? W b W- b ? l l - n n
b b ??????? l , l -, missing ET , 2 jets
? b tagging ??????? ? Lepton Jets ????? t
t ? W b W - b ? l n q' q b b ??????? l ,
missing ET , ?3 jets, b tagging ? Multi-Jets (
All Hadronic )????? t t ? W b W - b ? q' q q'
q b b ??????? ?5 jets, S ET , b tagging
b tagging ? silicon vertex detector
(SVX) ? b ????? ??? ? b ??????? pT ? soft
lepton ??? (SLT)?
25
??????????????
26
W(?l?)??????????????
27
???????????????
Lepton 3 jets ????????? 4 jets ??????? ? 4
????? ET ? 8 GeV ????????? ????? 5 ???????? ET
????? 4 ???? Lepton 4 jets ??? t t
?????????????????? p p ? t1 t2 X t1 ?
W1 b1 t2 ? W2 b2 W1 ? l n W2?
j1 j2 ????????????????? b tag ??????? b1
??? b2 ???? Pz (n) ?2???????
????????????????????????? ??????????c2
??????????????
163 ?? Lepton 4 jets ???????????? 153 ??
28
????4?????????????????? 76??(4??????????)
Mtop 175.9 4.8 (stat) 4.9 (syst) GeV/c2
175.9 6.9 GeV/c2 Combined CDF results ( all
channels ) Mtop 176.1 6.6
GeV/c2 Combined Tevatron results ( CDFD0 )
Mtop 174.3 5.1 GeV/c2
29
????????W?????????????????????
??????? Run I??? Mtop 174.3 - 5.1 GeV/c2 MW
80.452 - 0.062 GeV/c2
?? ?(???)???? ? ??(???)????
Run II
??????????????? ????? MHiggs lt 211 GeV
_at_95CL
Run?(2005??) ?Mtop lt 3 GeV/c2 ?MW 30
MeV/c2 ? ?MHiggs 30
30
Bc??????
???????????10-24?? ????????( 10-23?) ?????????????
?? ???????
1998?3?CDF????? F. Abe et al., PR D58,
112004(1998) ????????? Bc??????
6.270.02GeV/c2 E. Eichten et al., PR D49,
5845(1994) Bc?????? 0.41.4 psec M.
Beneke et al., PR D53, 4991(1996)
31
???????????
1998?3? Moriond QCD,Les Arcs, France Rare
Decays, Mixing and CP Violation Studies by
Jun-Ichi Suzuki (University of Tsukuba) 1998?3?
Seminar at Fermilab, Batavia, USA Observation of
Bc mesons in 1.8-TeV pp colisions by Shinhong
Kim(University of Tsukuba) 1998?3? La Thuile,
Aosta Valley, Italy Beauty Physics by Prem
Singh(University of Pittsburgh) 1998?3? Seminar
at Oxford University, Oxford, Ingland
Observation of Bc mesons in 1.8-TeV pp
colisions by Todd Huffman(University of
Pittsburgh)
32
(No Transcript)
33
Bc??????(1998?)
????(???)????
Bc??? ??????????????????????
15???????????????????????
??????????? vs ??
Bc? J/?l?????? ?J/?l???????
N(Bc) 20.46.2?5.6
34
???????????????

• CERN???(?????)????????????????????????????????????
  ??????????????????

35
?????????
???????? ( MH lt 150GeV/c2)
????????
_ bb
????? ?????
???????? ( MH gt 150GeV/c2)
????????
WW-
?????????
36
??????????????????
???????????????? MH(GeV/c2 ) (95?????????MH )
100 150
200
????(RUN2a)

• 2001?12?
• 2005?12?
• 2009?12?

LEP 2 ? ??????
????????? ???????????
37
?????????????????
2000? 2005? 2010?
I I
I ?????????? ???? (FNAL, ??)
MH lt180GeV/c2 ??????????? 2TeV

(95???) LEP????????? (CERN,?
????) MH115GeV/c2 ? 206GeV
(99???)
LHC???????? (CERN,?????)
MH lt1TeV/c2 ???????????
14TeV
?????????????? LC?????
???? (?????) MH lt0.9TeV/c2
??????????? 500GeV- 1TeV
??????????????
38
BACKUP
39
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

40
CDF??????????
Design Report (1981?) Engineering Run
(1988???) ???3 ??87?(13) ???3 ??189?
(17) ?? 57? (9) ?? 146? (13)
???? 15? (2) ???? 24? (2) ??
15? (2)17 ?? 19? (2) 10 Run1
(1998???) ???7 ??445? (????? 41) ??
276? (22) ???? 85? (5) ??
48? (5) 11 ??? 6? (1) ???
10? (1) ?? 13? (1) ???
10? (1) ????? ????
27?(??10??????17?) KEK 4?
?????? 7? ???? 7? ?????
3? ????????????? ITEP(???)?Glasgow(?)?Oxf
ord(?)? College of London(?)?KHEL(??)?????(??)
41
Tevatron History and Future
Discovery of top, Bc, MW, Mtop, sin2b,
measurements
5 x 1032 cm-2 s-1
2 x 1032 cm-2 s-1
Tevatron Collider Luminosity
2 fb-1 15 fb-1
0.1 fb-1
2000 2002 2004 2006 2008
Run 0 Ia Ib IIa
IIb s 1.8 TeV
1.96 TeV
42
Tevatron status

• Tevatron operations started in March 2001
• Luminosity goals for run 2a
• 5-8x1031 cm-2sec-1 w/o Recycler
• 2x1032 cm-2sec-1 with Recycler
• Achieved
• 3.8x1031 cm-2sec-1 in October 02
• Now recovered from June shutdown to improve p-bar
  cooling
• 170 pb-1 delivered until January 03
• 120 pb-1 are on tape
• 10 20 pb-1 used for analyses shown here
  (details)

Initial Luminosity
July 01
Now
170 pb-1
Integr. Luminosity
Delivered
120 pb-1
plans
On tape
43
Top quark Search
44
(No Transcript)
45
(No Transcript)
46
Mtop 25 GeV/c2
Leptoonic W Decay
Hadronic W Decay
47
s(tt)20pb
??? 1pb-1
48
?????????????
49

50
(No Transcript)
51
(No Transcript)
52
bb background
53
bb????????? 40GeV/c2?????? ????
54
???????????? Run 1A (1992-93, 19 pb-1 ) ???
PRL('94) PRD('94)
????? bkgd ??? ?????? Dilepton 2
events 0.56 0.25/-0.13 12.0 SVX
6 tags 2.3 0.3 3.2 SLT 7 tags
3.1 0.3 4.1 ?????????????P 0.26
(2.8s) ????(Lepton 4 jets ??????)
M top 174 10 (??) 13/-12(??) GeV/c2 s
( t t ) 13.9 6.1/-4.8 pb
55
???????????? Run 1A 1B 67 pb-1 ??? PRL('95)
????? bkgd ??? ?????? Dilepton 6 events
1.3 0.3 3x10-3 (2.7s) SVX 27
tags 6.7 2.1 2x10-5 (4.0s) SLT
23 tags 15.4 2.0 6x10-2
(1.9s) ?????????????P 1x10-6(4.8s)
????(Lepton 4 jets ??????)
M top 176 8 (??) 10 (??) GeV/c2 s ( t t
) 6.8 3.6/-2.4 pb
56
Run 1 110 pb-1???? ?????
???????????? 10 ??( em 7, mm 2, ee 1 )
???????????2.1 0.4 ?? ????gt3?????????
(SVX ????b-tagging) 34 ??
???????????8.0 1.4 ?? ?? Mistags
2.0 0.4 Zbb, Zcc 0.3 0.1 Wbb,
Wcc 2.7 0.7 Z ? tt, WW, WZ 0.3 0.1
Wc 0.8 0.3 Non-W( bb
???)1.9 0.7 (SLT ????b-tagging) 40 ??
???????????24.3 3.5?? (SVX,SLT
????2?????b-tagging) 9 ??
???????????0.4 0.1?? ??????? ( All
Hadronic )?????? 192 ??
???????????148 10??
57
????????????
s ( t t ) by CDF 6.51.7/-1.4 pb
58
4?????b tag ??????????????????
bkgd(?? W jets ????)???? ? constrain
????????(?? Mtop ???)(bkgd) ??????? Mtop
????? ?????? ????? bkgd???() Mtop(GeV/c2) SVX
b-tag 2? 5 5 3 170.1 9.3 SVX
b-tag 1? 15 13 5 178.0 7.9 SLT
b-tag 1? 14 40 9 142 33/-14 b-tag
0? 42 56 15 181.0 9.0 (ET(jet4)
gt 15GeV)
59
???????????????
GeV/c2
?????????????? 4.4 2.5
??????????? 1.8 1.0
??????????? 1.3 0.7
b-????????? 0.4 0.2
???????? 0.3 0.2
???4.9GeV/c2 ( 2.8 )??????????????????????????4.
4GeV/c2 ( 2.5 )???????? ??????????????
4?????????2??????????????W???????????????????
60
W????????????? PRL('98)????
4?????????2???????????
(1)b tag ????153 ?????Hgt310GeV????81 ??? ????H
ET( lepton ) S ET ( jet ) missing
ET (2)2???????b tag ???10 ??? (1)
(2)
2?????????????????? ? W?2 jets???????????
3.3s ( Prob5.4x10-4 ) ? MW 77.2
3.5(stat) 2.9(syst) GeV/c2 ???????????4????????
???????2??W????????????????????????????????????
61
??????(????)????????????
?????
?????x???
62
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
63
VH Production Cross Section Limit
95 CL Limit is about 30 times higher than SM
prediction for Mhiggs 115GeV/c2.
64
???????????

• MH lt 130 GeV/c2
• pp ?WHX ?l n bb X
• 125 lt MH lt 160 GeV/c2
• pp ?WHX ?l n W WX
• (like-sign dilepton jets)
• 150 GeV/c2 lt MH
• pp ?HX ?WW X ?l n l n X

(RUN2B)
(RUN2A)
95?????? ?????(3s) ??(5s)
RUN2(2009) 95????MH lt 180 GeV/c2???? MH lt 130
GeV/c2 ??? (3s evidence)
65
???CDF??RUN2(2001?)?????????????

• 3??????1000 t t ?????????Mtop 3GeV/c2?Mtop???????
  ????MW 30 MeV/c2?MW?????????????MH0.3MH
  ???????????????????
• ??6??????
• 95???? MH lt 180GeV/c2????????????
• MH lt 130GeV/c2?????????????(3s)?