Young-Kee Kim

1
Average B Lifetime

• Inclusive B lifetime with J/ys
• ct CDF 458 10stat. 11syst. mm (PDG 469
  4 mm)
• Exclusive B? J/y K lifetime
• ct CDF 446 43stat. 13syst. mm (PDG 502 5
  mm)

2
(Designed for B pp, H bb triggers)
Silicon Secondary Vertex Trigger
Toward searches for new phenomena
3
Heavy Mesons
B??J/y K? Bs?J/y f
B ? D0 p B ? h
h-
of B 5612
of B 339
of B 5612
Toward b meas. (Bs J/y Ks), Bs mixing (Bs
Dsp), a/g meas. (B pp) Toward new phenomena
M(Bu ? J/y K) 5280.6 1.7 1.1
MeV (DPDF0.9s) M(Bd ? J/y K0,K0?Kp-)
5279.8 1.9 1.4 MeV (DPDF0.2s) M(Bs ? J/y
f, f?KK-) 5360.3 3.8 2.1-2.9MeV
(DPDF-2.1s) DM(Ds,D), Dfp, fKK- 99.28
0.43 0.27 MeV (PDF 99.20.5MeV)

4
Searches for New Phenomena (D0)

• Gauge mediated SUSY
• s (??ETmiss) lt 0.9pb
• First generation leptoquark

• Extra dimensions
• Limits from ee, ?? final state
• MS(GRW) gt 0.92 TeV

Extra Dimensions
5
Searches for new phenomena (cont.)
using particle ID capabilities TOF
f KK-
CDF
CDF Run 2 Prelim.
S/N 140
TOF
S/N 12.5

• Novel uses (beyond K tagging) in the works
• CHAMPS, charged massive particles, (large flight
  time)
• SUSY LSP M(c10) NLSP M(c1)
• 4th gen. particles
• magnetic monopole trigger (large pulse height)

6
Tevatron Prospects (Timeline)
B factories, n programs
LHC (pp) 14 TeV
construction
LC (ee-) 0.5-1 TeV
7
EWK Prospects (MW, Mtop)
Run IIa

• dMtopRun I 5.1 GeV
• dMtopstat. dMtopsyst. (largely stat.)
• IIa dMtop 3GeV, IIb dMtop2GeV

• dMWstat. dMWsyst. (largely stat.)
• Run IIa dMW 30 MeV/expt.
• dMWworld 20 MeV

8
EWK Prospects (sin2qW)

• Forward-backward asymmetry of ll-, AFB
• a test of SM g/Z interference at ll- well above
  LEP-II reach
• AFB (75 lt Mll lt 105 GeV) effective weak mixing
  angle sin2qW
• at 10 fb-1, stat. dsin2qW 0.00028
• syst. dsin2qW 0.0007 (PDFs, current
  knowledge)
• dsin2qWworld (2001) 0.00017

Run II (10 fb-1) one expt. one channel
CDF Run I
AFB
AFB
ds/dMee
D0
Mee(GeV)
Mee(GeV)
Mee(GeV)
9
SM Prospects (Higgs)
Parameterized Simulation
100
LEP Reach
s(pb)
L(fb-1)
Run IIb
10
Run IIa
1
80 100 120 140 160 180
MHiggs (GeV)
H ??bb
H ? WW
Dominant decay mode
Run IIa ( 2 fb-1/expt) MH lt 115 GeV limit Run
IIb (15 fb-1/expt) MH lt 180 GeV limit or see
signal
10
SM Prospects (Higgs)
Higgs tt small cross section but low
signal/background
Major background t t-bar jets
Tests top quark Yukawa coupling
11
Standard Model Prospects
EW precision measurements (???(5)had(MZ2)
10-4, ?MW 20 MeV, ?mt 1 GeV, ?AFB 2 x 10-4)
Higgs direct searches could lead to
inconsistency.
12
SUSY Prospects (MSSM Higgs)

• h/H/A can have SM-like x-sections
• at small tan b
• bb h/H/A enhanced at large tan b

s 1 pb for tan b 30, Mh130GeV
tan ? 40
2fb-1 at tanb40 MA lt 145 GeV exclusion
lt 125 GeV 5s discovery
13
SUSY Prospects
14
Other Searches
15
Conclusions

• Tevatron Run II has begun!
• Some measurements are already competitive.
• High potential for discovery at Tevatron
• Tevatron, built to discover Ws and Zs, ended up
  discovering Top quarks (Mtop MW MZ).
• Tevatron Run I produced unexpected and rich B
  physics program. Also accuracy of MW, Mtop.
• LEP produced measurements and new particle
  searches much beyond expectation.
• We do know more about what to expect in Run II.
  BUT new and unexpected results follow well-run
  experiments!