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There’s Something About SUSY There’s Something About SUSY m. m. spiropulu spiropulu EFI/UofC EFI/UofC

There’s Something About SUSY

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There’s Something About SUSY. m. spiropulu EFI/UofC. Something Heavy Supersymmetry is the most plausible solution of the hierarchy (issue) . about SUSY. Something Light low energy Supersymmetry is required . Something Dark might provide the missing matter of the universe - PowerPoint PPT Presentation

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Page 1: There’s Something About SUSY

There’s Something About SUSYThere’s Something About SUSYm. m.

spiropuluspiropuluEFI/UofCEFI/UofC

Page 2: There’s Something About SUSY

about SUSYSomething Heavy

Supersymmetry is the most plausible solution of the hierarchy (issue)

Something Lightlow energy Supersymmetry is required

Something Darkmight provide the missing matter of

the universeif the lightest neutralino is stable

Something Urgenttestable at high enough energies (now)

Something Beautifulthe symmetry between fermions and

bosons

Something Exotica component of string theory

Something Coolthey couple with known and sizable

strengths

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SUSY is not a (super)model

SUSY is a spontaneously broken spacetime symmetry

SUSYSUSY

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bosons-fermions IBosons: Commuting fields Integer spin particles

Bose statistics

Fermions: Anticommuting fields Half-integer spin particles Fermi statistics

[anticommutativity ab=-ba and aa=-aa=a2=0 If a is the operator that creates an electron into a given state, a2 creates two electrons into the same state.]

A superspace has extra anticommuting coordinates

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bosons-fermions IIIf we Taylor expand an electron (anticommuting field) in the extra coordinates

selectron field in superspace = selectron(boson) + electron(fermion)

For each boson of spin J there is a fermion of spin J±½ of equal mass

quark

quark

gluon

quark

squark

gluino

PhotonW,Zgluon

Squarkslepton

PhotinoWino,Zinogluino

quarklepton

equal couplings

This picture is not telling the whole story:SUSY is broken The masses of the superparticles are not equal with their corresponding particles (or we would have seen them already). So we start SUSY with a few new parameters and introduce a bunchmore of what are called “soft breaking terms”: the masses of all the superparticles.

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general MSSM:370 parameters

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M1M2M3

particle content

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supersymmetry in colliders

Tevatron mass reach: 400 – 600 GeV for gluinos, 150 – 250 GeV for charginos and neutralinos 200 – 300 GeV for stops and sbottoms

LHC reach: 1 – 3 TeV for almost all sparticles

If SUSY has anything to do with generating theelectroweak scale, we will discover sparticles soon.

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hierarchy of scales

10-33 cmPlanck scale

GN ~lPl2 =1/(M1/(MPlPl))22

10-17 cmElectroweak scale

range of weak forcemass is generated (W,Z)

strong, weak, electromagneticforces have comparable strengths

1028 cmHubble scale

size of universe lu16 orders of magnitudepuzzle

What kind of physics generates and stabilizes the 16 orders of magnitude difference between these two scales

1027 eV 1011 eV 10-33 eV

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bosons-fermions IIIBose-Fermi Cancellation

SM

and the solution to the higgs naturalness problem(the radiative corrections to the higgs mass can not be 32 orders of magnitude larger than the higgs mass)

SUSY

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unification of couplingsThe gauge couplings of the Standard Model converge to an almost common value at very high energy.

what’s upwith that?

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unification of couplings

SUSY changes the slopes of the coupling constants

For MSUSY=1 TeV, unification appears at 3x1016 GeV

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proton’s (don’t) decay (fast)

In generic SUSies the proton could decay

Satisfy this by conserving R-parity R=(-1)3(B-L)+2S

We have measurements to the contrary effect

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with R-parity conservation

370107 (soft breaking) parameters

The end of the decay chain of all SUSY particles is the lightest supersymmetric particle (LSP)

The properties of the LSP, generally determine the signature of SUSY

LSP is stable – great dark matter candidate; In many SUSY models it also weakly interacting.

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squarks/sleptons gauginos higgses

example of mSUGRA SUSY

tanA

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example collider signatures

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example backgrounds

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more SUSY models

Gauge mediated SUSY (LSP is the gravitino) photon-lepton signatures. M1:M2:M3=1:2:7

Anomaly mediated SUSY (LSPs are the Winos) disappearing tracks. M1:M2:M3=3:1:-8

String inspired models

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SUSY mass cluesM

ass

(GeV

/c2 )

01

~ 1

~ Re~ R~ R~ ~ Rl~ t~ b

~ q~ g~

Upper bound(stau coanihilation)

190170

220

D0

D0

CDF

CDF

CDF

D0CDF

D0 GMSB

45DM

LEP2

LEP2

LEP2

97LEP2

LEP2

LEP2

LEP2 LEP2

LEP2

LEP2 GMSB

LEP2

TeVII reachTeVII reach

TeVII reach

Red : most natural mass*

* Anderson/Castano

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Cosmology needs sources of non-baryonic dark matter SUSies provide weakly interacting massive particles to account for the universe’s missing mass

neutralinosneutralinos

sneutrinossneutrinos

gravitinosgravitinos

We are closing in fast on either discovery or exclusion!

There is a good complementarity between direct, indirect, and collider searches

the dark side of SUSY

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already excluded

CDMS, CRESST,GENIUS

GLAST

Tevatron reach

J. Feng, K. Matchev, F. Wilczek

LHC does the rest

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How do we detect neutralino DM at colliders?

look at missing energy (LSP) signatures:

QCD jets + missing energy

like-sign dileptons + missing energy

trileptons + missing energy

leptons + photons + missing energy

b quarks + missing energy

etc.

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01χ~

01χ~

CDF 300 GeV gluino candidate:

gluino pair strongly produced,decays to quarks + neutralinos

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detectors

DD

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~2 x Tevatron (3.2 Km)

LHC (27 Km)

Main Injectorand Recycler

p source

Booster

Teva

tron

Teva

tron

pp 14 TeV 1034

32105 TeV 2 pp

machines

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gluino decay path example

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example cross sections

B L tNobserved

L is the Luminosity is the acceptance (trigger included)B is the Background

is the cross section (unit is area: the effective

scattering size of a process)

Total p/antip cross section is 7x10-30 m2

Unit of Barns (b) = 10-28m2

(ppX)=70 mb

Run I L ~ 1031 crossings/cm2/sec

N/sec ~ L = 7x105/sec

>1 interactions per beam crossing!

Cross Section for top production: (pptt+X)=70 mb

This is around 1/1010 of total

N/sec ~ L = 7x10-5/sec

A couple were created/day but we only

saw a small %

~100 events in 3 ys in two experiments

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recording the physics: triggering

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recording the physics: triggering

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recording the physics: triggering

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• Calorimeter energyCentral Tracker (Pt,)Muon stubs

Cal Energy-track match E/P, Silicon secondary vertexMulti object triggers

Farm of PC’s runningfast versions of Offline Code moresophisticated selections

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Missing Energy provides R-parity conserving SUSY signatures (R=(-1)3B+L+2S) and also appears

in many other phenomenological paradigmsMET + 3 jets (squarks,gluinos)

MET + dileptons + jets (squarks gluinos) MET + c-tagged jets (scalar top)

MET + b-tagged jets (scalar bottom,Higgs) MET + monojet (gravitino, graviton)

MET + photons (gravitino)

iiiT n)(EE ˆsin

|P| max T

Missing ET + multijets (CDF)

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01χ~

01χ~

Production/Decay GraphsProduction/Decay Graphs

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MAIN RING DETECTOR NOISE COSMICS eliminated with a set of timing and good jet quality requirements

“Fake” MET cosmic

QCD gap

Main Ring

& QCD mismeasurements

Use todefinefiducial

jets

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Standard Model Missing Energy +jets

top, dibosonsMC norm using theory cross section

QCD MC norm tojet data

Z/W +jets MC norm to Z data

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Number of High PT isolated tracks

0 >0

“blind analysis” approachwhere you expect your signaldon’t look until you are ready

Analysis

HT=

ET(2

)+E

T(3

)+M

ET

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Optimization for SUSYOptimization for SUSY

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comparisons around the “box”

QCD

Z(inv)

W(,e)top

W()

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““The BOX”The BOX”

The Box: SM Expected 76±13

Foundin data

74

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““The other BOXes”The other BOXes”

A/D SUSY boxes:SM Expected 33±7

Foundin data

31

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““The other BOXes”The other BOXes”

SUSY box C:SM Expected 10.6±1

Foundin data

14

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LIMITSLIMITS

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Candidate Event

Knowledge from this analysis applied in monojet+MET analysiswith RunI data that can search for associate gluino-neutralino production (also KK graviton etc).

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...7.1 21

22

23

2Z 0.014M0.24M7.2MM

The required cancellation is easier if the gluino mass is not “too large”.

802.7

300 2Z

23

3 MM

M

There’s Something About the gluino mass (why we think we’ll see it sooner than later)

susy – electroweak connection favors lighter gluinosto avoid tuning (G. Kane et al)

look at models with nonuniversal gaugino masses

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If this signal is observed , the structure in the l+l-mass distribution will constrain the 0

1 and 02

masses (difficult). LHC will take it from there.

Batavia TeV, 2 , spp

chargino/neutralino trilepton signature

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Aided by improved CDF/D0 lepton coverage and heavy flavor tagging

stop signatures

Batavia TeV, 2 , spp

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colliders, SUSY and baryogenesis

Baryogenesis requires new sources of CP violation besides the CKM phase of the Standard Model (or, perhaps, CPT violation).

B physics experiments look for new CP violation by over-constraining the unitarity triangle

SUSY models are a promising source for extra phases

since colliders will thoroughly explore the electroweak scale, we ought to be able to reach definite conclusions about EW baryogenesis

EW baryogenesis in SUSY appears very constrained, requiring a Higgs mass less than 120 GeV, and a stop lighter than the top quark

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such a light stop will be seen at the Tevatron

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LHC is a SUSY factory.LHC is a SUSY factory.

If LHC does not find SUSY forget about If LHC does not find SUSY forget about (weak scale) SUSY.(weak scale) SUSY.

High rates for direct squark and High rates for direct squark and gluino production.gluino production.

Model independent measurement OK- Model independent measurement OK-

Model independent limit DIFFICULT. Model independent limit DIFFICULT.

SUSY@LHCSUSY@LHC

Page 52: There’s Something About SUSY

Use consistent model in simulations to study different cases.

Combinatorial SUSY is the dominant background to SUSY.

Guess and scan over the most difficult points of the multi-parameter-multi-model SUSY space.

Ultimately you want to measure all the parameters of the model.

SUSY@LHCSUSY@LHC

Page 53: There’s Something About SUSY

Correlates well with

TTTTT EPPPP )4()3()2()1(

),min( ~~ guSUSY MMM

SUSY@LHCSUSY@LHC

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SUSY@LHCSUSY@LHC

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t t

bbhh

suppress to

1.0DR lepton, isolated-non

GeV 100 P with

jets additional least twoat

GeV 55Pwith

jets-b taggedoexactly tw

GeV300E

:Require

events SUSY of 20%in

then ~~ If

bb

T

T

T

01

02

-1

SMSUSY

SUSY@LHCSUSY@LHC

Page 56: There’s Something About SUSY

Geneva TeV, 14 , spp

tan=10sgn =+

Method worksover a large regionof the parameter space in the SUGRA modelContours show number of reconstructed Higgs

SUSY@LHCSUSY@LHC

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SUSY@LHCSUSY@LHC

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SUSY@LHCSUSY@LHC

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There’s Something more About SUSY

• The predicted value of sin2(W(MZ))~0.2314-0.25(s(MZ)-0.118)+0.002 (e.g. Ross et. al)within 1% of measured value

• The predicted upper limit on the higgs mass~130 GeV (e.g. Carena et. Al, Ellis et. al …)with 115 lower experimental limit things get urgent

• EWSB through radiative correctionsthe massiveness of the top quark

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L. Alvarez-Gaume, J. Polchinski, M. Wise NPB221:495 (1983)also L. Ibanez, and J. Ellis, D. Nanopoulos, K. Tamvakis the same year

Quote from the abstract: "We discuss the motivation for consideringmodels of particle physics based on N=1 supergravity...renormalizationeffects drive spontaneous symmetry breaking of SU(2)xU(1) to U(1) for atop quark mass between 55-200 GeV."

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The immediate future HEP hadron collider program

Year: 2002 03 04 05 06 07 08 09 10

Run IIaCollider: Run IIb

BTeV physics

LHC physics

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Higgs

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the wager

A light Higgs stabilized by TeV scale SUSY is what will be found.

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something about terminologyNot everything super- has to do with supersymmetry. (superconductor, supermarket, superstition, supernatural etc…)

However, SUPERMAN does

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Lord of the Rings The Two TowersRun 152507 event 1222318

Dijet Mass = 1364 GeV (corr)

cos * = 0.30

z vertex = -25 cm

J1 ET = 666 GeV (corr)

583 GeV (raw)

J1 = 0.31 (detector)= 0.43 (correct z)

J2 ET = 633 GeV (corr)

546 GeV (raw)

J2 = -0.30 (detector)= -0.19 (correct z)

Corrected ET and mass are preliminary

(thanks to Rob Harris)

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RunIIa Luminosity Goals 5-8 E31 cm-2/sec (w/o Recycler) 10-20 E31 cm-2/sec (w/ Recycler) integrated: 2-5 fb-1 (2004)

RunIIb Luminosity Goals 40-50 E31 cm-2/sec integrated: 15 fb-1 (2007)

(W), (Z) ~10% higher(tt) ~35% higher

TeV 1.96 s

* For most of Run Ib, average luminosity at start of store was ~1.6x1031 cm-2 s-1. Integrated luminosity delivered was ~0.15 fb-1.

The collider performance in Run II got off to a slow start. The Beams Division made quick progress on the luminosity:

The peak luminosity increased from ~0.9E31 on 3/25/02 to ~1.8E31 by 5/10/02 to 3.6E31 by 10/5/02.Many problems identified; some solutions found; some to be.

Still improving collider performance.

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Jan. HEPAP

AA->MI opticsStep 13

new injection helix

beamloading compensation

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January 1 – June 1• Improve antiproton efficiency from Accumulator to Tevatron low-• Improve proton intensity at Tevatron low-• Commission Recycler parasitically

June 3-14• Shutdown to install new Accumulator transverse core cooling

June 15 – December 31• Improve stacking rate• Shutdown for continuing Recycler vacuum work (tentatively scheduled

September 30-November 10)• Integrate Recycler into operations• Minimize access time

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Underlying Accelerator Physics Issues

Three primary accelerator physics issues are being dealt with:– Accumulator emittance/heating

• Intrabeam scattering appears implicated as major source

– Long range beam-beam in the Tevatron• Manifested as poor antiproton lifetime at 150 GeV• Once collision configuration achieved, this is not impacting performance• Contribution to lifetime from vacuum under investigation

– Proton longitudinal emittance• Beamloading compensation implemented some improvement, but

appears to be growth during acceleration in Main Injector.

These issues interconnect many of the individual performance parameters

Progress requires attacking everything in parallel.

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Physics in Run IIPrecision measurements, looking for an

inconsistency with the Standard Model:– top quark and W boson properties

– measurements of B mixing and CP parameters

Possible discoveries include the Higgs boson or any new physics at the Tevatron mass scale:– Higgs boson

– Supersymmetry

– Extra dimensions

– New dynamics (technicolor, new gauge bosons)

– Quark or lepton compositeness.

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Prospective physics highlights at 0.1-0.3 fb-1

0.1 fb-1

• Even with a data sample of this size, there will be many new physics results.– New detectors have increased

capability

– Ecm changed from 1.80 to 1.96 TeV, significantly increasing cross sections for high-mass states.

• Production of top, bottom, and charm quarks, W and Z, jets

• B Physics: Start of a broad program: spectroscopy, lifetimes, and mixing

0.3 fb-1

• Major new results in every area

• Top quark: Mass measurement with twice current precision

• CP violation: Bs mixing to xs = 25

• New physics searches: – Extra dimensions with scale of 1.6 TeV

– Confirmation or elimination of new physics indicated by Run I observation of rare events

• QCD: Jet spectrum at highest transverse energy

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Prospective physics highlights at 1-2 fb-11 fb-1

• Electroweak– W magnetic moment, signals for

WW and W+Z production– top quark properties with 1000

top events per experiment

• Supersymmetry– possible signals in trileptons– SUSY Higgs signal for m(A) ~

100 GeV, tan = 35

• B Physics b lifetime to 0.06 ps

2 fb-1

• Electroweak: – W boson mass measured to greater precision

than from LEP – top quark mass to 2.7 GeV/expt

• Higgs – 95% exclusion of Higgs boson with mass of

115 GeV

• Supersymmetry– observe squarks and gluinos if gluino masses

below 400 GeV– observe chargino/neutralinos if mass below

180 GeV, tan

• CP violation and Bottom quark – Measurement of decay mode Bd K*with 60 events

– Bs mixing to xs = 40

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Prospective physics highlights at 4-8 fb-1

4 fb-1

• Higgs: 95% exclusion of standard Higgs boson up to 125 GeV

• Supersymmetry– discovery of supersymmetry

in large fraction of parameter space for minimal supersymmetry

– discovery of SUSY Higgs for

m(A)~150 GeV, tan

8 fb-1

• Higgs– 3evidence for standard

Higgs with mass less than 122 GeV

– 95% exclusion of standard Higgs for masses below 135 GeV or from 150-180 GeV

• Supersymmetry: – 95% exclusion of the minimal

supersymmetric Higgs in the maximal mixing model

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Prospective physics highlights at 15 fb-1

• Higgs– 4-5evidence for standard Higgs with mass of 115 GeV – 95% exclusion of standard Higgs for all masses below

185 GeV• Supersymmetry

– SUSY trilepton signal extended to large tanand gluino masses 600-700 GeV

– possible discovery of supersymmetric Higgs boson m(A) up to 200 GeV, tan

• Electroweak – top quark mass measurement with error of 1.3 GeV/expt – W mass measurement with error of 15 MeV/expt

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CDF-II detector is recording quality data (ICHEP 2002)

– Stable physics running established in early 2002• intensive effort during fall 2001 shutdown had big payoff • silicon coverage, trigger came together very quickly

> 95% / 90% / 80% of L00/SVX/ISL now (summer 2002) regularly read out

L1/L2/L3 trigger 6400/145/25Hz @1.6E31, <1% deadtime (BW 40K/300/70)

• trigger algorithms increased rapidly in sophistication; now quite stable

~140 separate trigger paths (e, , , , , jet, displaced track, b jet, …)

– 33.0/pb delivered; 23.5/pb recorded January-June 2002• ~10.0/pb pass the most stringent analyses’ “good run” criteria

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CDF II Detector

Tile/fiber endcapcalorimeter (faster,larger Fsamp, no gap)

132 ns front endCOT tracks @L1SVX tracks @L240000/300/70 Hz~no dead time

TOF (100ps@150cm)

7-8 silicon layersr, rz, stereo viewsz0

max=45, max=22<R<30cm

30240 chnl, 96 layer drift chamber(1/pT) ~ 0.1%/GeV(hit) ~ 150m

coverageextended to =1.5

Double b tags essentialfor Mtop, Hbb

All critical components are working well

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CDF II DetectorMajor qualitative improvements over Run 1 detector:– Whole detector can run up to 132 nsec interbunch

– New full coverage 7-8 layer 3-D Si-tracking up to || ~ 2

– New faster drift chamber with 96 layers

– New TOF system

– New plug calorimeter

– New forward muon system

– New track trigger at Level 1 (XFT)

– New impact parameter trigger at Level 2 (SVT)

All systems working well– Silicon and L2 took longer to commission

Forward region restructured

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Taking good quality data during 2002Many new capabilities of detector and trigger

Each Run II pb-1 worth much more than each Run I pb-1!And of course 9% more W,Z; 35% more tt at 1.96 TeV

Many early physics resultsWl), W ) / Z )m(B), B), M(Ds,D+), BR(D0 KK,)

Tooling up for MW, Mtop, SUSY searches, Higgs search

CDF

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Run IIb• Additional luminosity provides greater precision for electroweak

measurements, greater reach for exotic searches, plus the opportunity to observe a low-mass Higgs boson.

• Accelerator– Improve luminosity by factor of 2-3 with a number of modest upgrades.

– Accelerator advisory committee reviewing progress.

– Right now, the attention must be concentrated on run IIa.

• Detectors– Two upgrade projects:

• Replace partly rad-damaged silicon detectors with new detectors of simpler design with more rad-hard technology.

• Upgrade data acquisition and triggers to deal with higher luminosity.

– PAC has been following projects, Stage 1 approval discussion at Aspen

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R

The Particle Physics Roadmap for the Next 20 Years

Identify Sources

ofDark

Energy

Decipherthe

Footprintsof the

Big Bang

Find theRegime ofQuantum

Gravity andExtra

Dimensions

DiscoverUnification

of theFundamental

Forces

Find theScales ofFlavor

Breaking,Matter

Unification

UnderstandMatterversus

Antimatterin the

Universe

Discover, Identify, Understandthe New Physics at the

TeV ScaleSupersymmetry?

Extra Dimensions?New Forces?

Find theSources

ofCP

Violation

LeptonNumber

Violation?

Explore theNeutrino Sector:

Masses andOscillations

CP violationand

Rare processesin the

Quark Sector

Identify theDark Matter

Neutralinos?Brane matter?

Axions?

Equationof State

forDark Energy

ProtonDecay?

Find theHiggs

Page 83: There’s Something About SUSY

ResultsFrom the Data of 2000:

aμ(exp)=11 659 204(7)(5)×10-10 (0.7 ppm) Exp. World Average:

aμ(exp)=11 659 203(8)×10-10 (0.7 ppm)300

260

220

180

140

100

(aμ-0

.001

1659

) ×10

1 0

1998 1999 2000 World Average

Theory

if this is new physics, it is probably SUSY, and the Tevatron will confirm it.

if it is not new physics, it constrains susy models significantly

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graviton emission simulation: we don’t see the graviton we see a jet from the gluon

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Two events are graviton simulation and one is real CDF data: Can youpick the gravitons?

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two events are real CDFdata and one is gravitonsimulation; Can youpick the graviton?

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good news forthe Tevatron

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mSUGRA

LSP gives rise to missing energy signatures

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Higgs Sector

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How heavy can SUSY be?

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good news fordirect searches, too!

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sneutrino dark matter

if sneutrinos are the LSP, they are dark matter

but there are problems:

LEP measurement of the invisible width of the Z bosonimplies M_sneutrino > 45 GeV

but then expect low abundance due to rapid annihilationvia s-channel Z and t-channel neutralino/chargino exchange.

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sneutrino dark matter

L. Hall et al (1997): susy with lepton flavor violation can splitthe sneutrino mass eigenstates by ~> 5 GeV, enoughto suppress the annihilation processes

however, the same interaction seems to induce atleast one neutrino mass ~> 5 MeV.

this is now excluded completely by SuperK + SNO +tritium beta decay.

it appears that sneutrinos are ruled out as thedominant component of CDM

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gravitino dark matter

Large classes of susy models, i.e. gauge-mediated andother low-scale susy breaking schemes, produce light(keV) gravitinos that overclose the universe.

Fujii and Yanagida have found a class of“direct” gauge mediation models where the decaysof light messenger particles naturally dilutes thegravitino density to just the right amount!

Such models have distinctive collider signatures

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Kaluza-Klein dark matter

If we live in the bulk of the extra dimensions,then Kaluza-Klein parity (i.e. KK momentum)is conserved.

So the lightest massive KK particle (LKP) is stable

Could be a KK neutrino, bino, or photon

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How heavy is the LKP?

Current data requires MLKP ~> 300 GeV

LKP as CDM requires MLKP ~ 650 –850 GeV

the LHC collider experiments will certainly see this!

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the Bigger Big picturethe Bigger Big picture

The Standard Model describes everything that we have The Standard Model describes everything that we have seen to extreme accuracy. seen to extreme accuracy.

Michelangelo Antonioni on Ferrara:“...it is a city that you can only see partly and the rest disappears and can onlybe imagined...” (beyond the clouds)

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Now we want to extend the model to higher energies and get the whole picture

the Bigger Big picturethe Bigger Big picture

For this we need new experiments and ideas

supersymmetry

strings

strings

(even) extra dimensions

(even) extra dimensionsIa

n Sh

ipse

y

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If you ask questions about what happened at very early times, and you compute the answer, the answer is: Time doesn’t mean anything. S. Coleman

Space and time may be doomed. E. Witten

I am almost certain that space and time are illusions. N. Seiberg

The notion of space-time is clearly something we’re going to have to give up. A. Strominger

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D. Gross

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…for any important assertion evidence must be produced;…prophecies and bugaboos must be subjected to scrutiny;… guesswork must be replaced by exact count;….accuracy is a virtue and inquiry is a moral imperativeTo the hegemony of science we owe a feeling for which there is no name, but which is akin to the faith of the innocent that the truth will out and vindication will follow. In its purest form science is justice as well as reason.

Jacques Barzun

SCIENCE: The Glorious Entertainment

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DM at colliders (eg LHC)

M0=100 GeVM1/2=300 GeV0 almost pure BinoWill be able to predictwithin 20% h2

However no strict useful upperbound from h2 <0.5

show feng matchev plot

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What will we learn at colliders

Does low energy SUSY exist (discovery)

Measure the parameters and SUSY masses

Figure out how SUSY is broken

Is R-Parity violated

IS THE dm susy?

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A proton/antiproton beam is a broadband beam of quarks, antiquarks and gluons.

Total longitudinal momentum is unknown.Total trasnverse momentum is zero

Total transverse momentum of invisible particles inferred from visible transverse momentum.

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HISTORY-LINES

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Deliot et al.Resonant sneutrino/slepton production

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09.0 tan ,150M ,200 20 m

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MACHINES

Main Injectorand Recycler

p source

Booster

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Super-ModelsMSSM

couplings trilinearAA

masses squark and sleptonmm

Higgs odd-CP of mass m(A)

tan

parameter mass Higgs

mass gluinom

q

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,

,

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sign

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tan

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masses gaugino unified M

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hep-ph/0003154With 2 fb-1

m1/2 up to 150 GeVfor m0~200 GeV

mSUGRA

GMSBWith 2 fb-1

50-100 TeVfor m( )~200-300 GeV~

Summary of RUNII SUGRA Workshop

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Tovey

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tan8.1

500500

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1000 fb-1

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