EW observables probe the Higgs bosons indirectlyby means of quantum corrections.

Large quantum corrections to EW observables come fromthe top quark.

Electroweak Measurements

Mtop : Direct vs. Indirect

Indirect meas.s :fits to EW observables

Direct meas.s :CDF and D0

Lower limits : direct searches in e+e- and pp

MH < 165 ~ 206 GeV at 95% CLFavor light Higgs

Precision EW Measurements

Mw(GeV)

MH(GeV)

Mtop (GeV) year

1 prediction

1991 Mtop limit

1991

2001

1995

EW Measurements (last ~10 years)

Higgs Searches at LEP 2 (e+e- collider)

e+e- ZHcross section (fb)

e+e- cm energy (GeV)

M > 109 GeV3.0 ZH, 3.6 bgrn, 6 observed

~2 excess observed in agreement with MH ~ 115 GeV

or MH > 113 GeV at 95% CL

& girls

TevatronLEP 2

Higgs Searches : LEP 2 Tevatron

Run IIa

Tevatron Run IIa EW Measurements

Tevatron & CDF/D0 Upgrade (Run II)

HW+

W-Hd-

u

W+*

W+

LEPReach

t

Run IIa2001 ~ 2003 : 2fb-1

Run IIb2004 ~ 2007 (?)

20fb-1 (?)

installing silicon tracker, prior to detector roll-in

CDF Detector

electronics

1.5m

~722 k channels

silicon

CDF Silicon System

residual dist. (cm)

Hit Resolution~200 m

Goal : 180 m

96 layers

e+

e-

CDF Drift Chamber

a collaboration of several groups includingY.K.Kim’s group (Berkeley)

Ko p B+ J/ K+

Z e+ e- Jets

J/ +-

() GeV/c2

W e transverse mass

CDF : Preparing for First Physics …

Ko p B+ J/ K+J/ +-

() GeV/c2

CDF B Signals

CDF B Signals

CDF Z Signals

CDF Z Signals

CDFJets

Physics with 200 pb-1

B physics BS mixing sin2

Top, EWK physics a larger sample

~ (Run I) x 4

Extend SUSY and new particle studies

QCD

BS DS , DS DS

SM

discovery

hint

Near-term Prospects

the Standard Model Its foundation is symmetry. Effective Theory

Supersymmetric extensions of the Standard Model Supersymmetry relates bosons

and fermions. h, H, A, H+, H-

h SM Higgs Mh < ~130 GeV

Grand Unified Theory Unification of

coupling strengths

Physics beyond the Standard Model

Evolution of EM, Weak, Strong

SM

SUSY

~~

e+ e-

superparticle

e e~

e

Me Me

necessary to understand EWSB

1991 2021 (year)

LEP (e+e-) 208 GeV

LHC (pp) 14 TeV

Tevatron (pp) 2 TeVRun IIRun I

Energy Frontier Acceleratorsto understand origin of Mass

2001 2011

e+e-(0.5-1 TeV) ?

e+e-, +- (2-4 TeV) ?pp (~100 TeV) ?