ew observables probe the higgs bosons indirectly by means of quantum corrections

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) ?