Carmine Elvezio Pagliarone - INFN Lecce web · IFAE 2003, Lecce – 24/04/2003 Carmine Elvezio...

IFAE 2003,IFAE 2003, LecceLecce –– 24/04/2003 24/04/2003 Carmine Elvezio PagliaroneCarmine Elvezio Pagliarone

Carmine Elvezio PagliaroneCarmine Elvezio PagliaroneINFN PisaINFN Pisa

((on on behalfbehalf of of CDFCDF & & D0D0 ))

IFAE 2003,IFAE 2003, LecceLecce Carmine Elvezio PagliaroneCarmine Elvezio Pagliarone

the CDFII the CDFII CollaborationCollaboration

CDF physicists

US 63%

Taiwan3%

Germany2%

Canada3%

Italy20%

Japan9%


DD

Main InjectorMain Injectorand Recyclerand Recycler

p sourcep source

BoosterBooster

Fermilab Tevatron ColliderFermilab Tevatron Collider


The Fermilab Accelerator ComplexThe Fermilab Accelerator Complex•• Main Injector (150 GeV proton Main Injector (150 GeV proton

storage ring) replaces Main Ring storage ring) replaces Main Ring (the original accelerator);(the original accelerator);

•• Completely revamped stochastic Completely revamped stochastic cooling system for antiprotons;cooling system for antiprotons;

•• A new permanent magnet Recycler A new permanent magnet Recycler storage ring for antiprotons;storage ring for antiprotons;

•• Increased number of p and pIncreased number of p and p--bar bar bunches :bunches :

6 6 36 (396 ns)36 (396 ns)

•• Higher center of mass energy Higher center of mass energy 2 TeV2 TeV achivedachived increasing the increasing the beam Energiesbeam Energies

900 900 980 GeV980 GeV


( ) ( ))(1

,,,,,3 *

*0

pp

zppyx

p

pr FNBNf

p

εε

σεεθθβεβ

γ

+

=LTotal AntiprotonsTotal Antiprotons p per bunchp per bunch

NpNBNp

Tevatron Collider ImprovementsTevatron Collider Improvements

Physics Physics OpportunitesOpportunites•• TopTop•• HiggsHiggs•• QCDQCD•• ElectroweakElectroweak•• B PhysicsB Physics•• New New PhenomenaPhenomena


Tevatron Performances Tevatron Performances vsvs Expected LuminosityExpected Luminosity


CDF Integrated Luminosity

D0D0CDFCDFPhysics LuminosityPhysics Luminosity

84 pb84 pb--11 (since April 02)(since April 02)130 pb130 pb--11

180 pb180 pb--11Delivered LuminosityDelivered Luminosity

Status of CDF & D0 DetectorsStatus of CDF & D0 Detectors


Short term Luminosity ProspectsShort term Luminosity Prospects

–– Massive effort put into understanding and improving Massive effort put into understanding and improving LuminosityLuminosity

•• Fixed Accumulator Fixed Accumulator MI opticsMI optics•• Much work on stabilizing tunes in injection and low beta Much work on stabilizing tunes in injection and low beta

squeezesqueeze•• Fight large antiproton Fight large antiproton emittancesemittances•• Work on accumulator lattice to reduce beam heatingWork on accumulator lattice to reduce beam heating

–– Max luminosity achievable Max luminosity achievable without Recycler ~8x10without Recycler ~8x103131

–– Need recycler to get to Need recycler to get to 22 xx 10103232

•• full benefits of Recycler later onfull benefits of Recycler later on


EndplugEndplug CalorimeterCalorimeterTrackingTracking

Layer 00 Layer 00 SVX IISVX IIISLISLCOTCOT

Front End ElectronicsFront End ElectronicsTrigger (Trigger (pipelinedpipelined))DAQ SystemDAQ SystemMuon SystemsMuon SystemsLuminosityLuminosity MonitorMonitorTOFTOFOfflineOffline SoftwareSoftware

SUSY02, SUSY02, HamburgHamburg

COTCOT

SiSi trackingtracking

CMX Mini skirt

IMU

CMX

CMP


•• Central Outer Tracker (COT)Central Outer Tracker (COT): : –– open cell drift chamber open cell drift chamber –– maximum drift time 100nsmaximum drift time 100ns

•• Small cell size, Fast gasSmall cell size, Fast gas–– single hit resolution ~200 single hit resolution ~200 µµmm–– excellent pattern recognition excellent pattern recognition –– improved stereo capabilitiesimproved stereo capabilities

•• Silicon Tracker System:Silicon Tracker System:–– increased increased zz coverage (length ~ 1m) coverage (length ~ 1m) –– ηη coverage up to coverage up to | | ηη | < 2 | < 2 –– 33--DD track reconstruction track reconstruction –– impact parameter resolution impact parameter resolution

•• σσφφ < 30 < 30 µµmm•• σσzz < 60 < 60 µµmm

•• 3 different detectors: 3 different detectors: ≈750,000 channels≈750,000 channels–– L00:L00: inner most, R= 2.5 cm, inner most, R= 2.5 cm, radrad--hard, SShard, SS–– SVXII:SVXII: 5 layers, 3<R<10 cm, DS (90 and 5 layers, 3<R<10 cm, DS (90 and sassas))–– ISL:ISL: 2 layers, 10<R<20 cm and large 2 layers, 10<R<20 cm and large η, η, DSDS

The CDFII Tracking SystemThe CDFII Tracking System

COT into CDFIICOT into CDFII

Trigger SystemTrigger System:: two main two main improvements improvements ••XFT: track reconstruction at L1XFT: track reconstruction at L1••SVT: displaced track triggering at L2SVT: displaced track triggering at L2


•• Improved z coverage of Silicon tracker Improved z coverage of Silicon tracker +50% of Run I geometrical acceptance (+50% of Run I geometrical acceptance (……top)top)

•• 3D 3D vertexingvertexing capabilities capabilities better fake rejectionbetter fake rejection

•• Track reconstruction can be extended to Track reconstruction can be extended to 1<1<ηη<2 <2 several major effects:several major effects:–– bb--taggingtagging (recover ~30% of (recover ~30% of bb’’ss in in tttt events)events)–– lepton IDlepton ID (electrons in Plug calorimeter)(electrons in Plug calorimeter)

•• Increased muon system acceptance by 12% Increased muon system acceptance by 12% affects trigger, ID and SLT efficiencyaffects trigger, ID and SLT efficiency

Run II detector improvementsRun II detector improvements

13131313SLT(bSLT(b--jet)jet)65654444SVX(bSVX(b--jet)jet)

Run IIRun IIRun IRun IEfficiencies (%)Efficiencies (%)


CDFCDF--II StatusII Status

•• Detector:Detector:–– All systems installed and commissioned;All systems installed and commissioned;

•• DAQ and trigger:DAQ and trigger:–– Running physics trigger table with Running physics trigger table with > 100> 100 trigger paths since Feb ‘02trigger paths since Feb ‘02

•• NewNew SVTSVT very successfulvery successful–– Typical running conditions:Typical running conditions:

•• L1L1: : 3.5KHz3.5KHz L2: L2: 200 Hz200 Hz L3: L3: 20 Hz20 Hz

•• Data processing:Data processing:–– Reconstruction farm keeps up with data loggingReconstruction farm keeps up with data logging–– Physics groups skim data:Physics groups skim data:

•• Observe signals from low and high PObserve signals from low and high PTT triggers: J/triggers: J/ψψ, D, B, W, Z, D, B, W, Z


•• Standard Model Standard Model accomodatesaccomodates but does but does not explain:not explain:

–– EWSBEWSB–– CPCP--ViolationViolation–– Fermion MassesFermion Masses

•• Higgs selfHiggs self--coupling is positive which coupling is positive which leads to a triviality problem that leads to a triviality problem that bound Mbound MH H from abovefrom above

•• The natural MThe natural MHH value is L, the scale value is L, the scale of new of new physiscsphysiscs; if SM is the ultimate ; if SM is the ultimate theory up to GUT scale, an extremely theory up to GUT scale, an extremely precise fine tuning is required; precise fine tuning is required;

Extremely preciseExtremely precise

But also many open questionsBut also many open questionsSM SM gioiegioie e e doloridoloriSM SM gioiegioie e e doloridolori


Many Searches for New PhenomenaMany Searches for New Phenomena

•• SUSY in many different Scenarios:SUSY in many different Scenarios:–– MSSM MSSM –– mSUGRAmSUGRA–– 33rdrd Generation/High Generation/High tantanββ–– RPVRPV–– GMSBGMSB–– AMSBAMSB

•• LFV also in the Higgs Sector;LFV also in the Higgs Sector;•• Large Extra Dimensions:Large Extra Dimensions:

–– ADDADD–– RandallRandall--SundrumSundrum

•• LeptoquarksLeptoquarks•• CompositnessCompositness


Advances on Tau ID & Advances on Tau ID & Searches with Searches with TausTaus in the in the

Final stateFinal state


TausTaus in Run IIin Run II•• Many searches with Many searches with taustaus in the final state;in the final state;•• TausTaus were traditionally more “difficult” for were traditionally more “difficult” for

both experiments;both experiments;•• Needs of a significant improvement;Needs of a significant improvement;•• CDF Lepton+Track (LT) Triggers (5)CDF Lepton+Track (LT) Triggers (5)::•• Implemented single tau and Implemented single tau and DitauDitau Triggers (5):Triggers (5):

–– ττ + MET, + MET, –– ττhh + + ττll (l= e, (l= e, µµ))–– ττhh ττhh

•• lepton+Tracklepton+Track Trigger Trigger –– Lepton PLepton PTT> 8 > 8 GeV/cGeV/c

e, CMUPe, CMUP--µµ,CMX,CMX--µµ; ; –– TauTau--style isolated 5 style isolated 5 GeV/cGeV/c track;track;–– Targets Targets multileptonmultilepton final states including final states including

taustaus;;•• Trigger was Trigger was Installed Installed and and Commissioned Commissioned in in

January 2002.January 2002.


lepton+trklepton+trk TriggerTrigger

τ

τ

ppTTll > 8 > 8 GeV/cGeV/c

ppTTseedseed> 5 > 5 GeV/cGeV/c

••Lepton (Lepton (e,e,µµ))Lower Lower ppTT ThresholdThreshold

••Isolated trackIsolated trackNo tracks in 10No tracks in 10--303000 ConeCone

No No prescaleprescale with with high luminosity!!high luminosity!!

Isolation ConeIsolation ConeTau ConeTau Cone

ZZ


ZZ Event SelectionEvent SelectionBaseline selection: e+τh

e: 10 GeV, τh : 20GeVTransverse mass cut to reduce W+jets events:

MT(l,ET) < 25 GeV/c2

Vector Sum pT cut to reduce QCD events

pT(l,ET) > 25 GeV/cExample: Run I

(e: 10GeV, τh :15GeV)

CDF Run I Preliminary(OS (OS ll ττhh + 0 jets)+ 0 jets)


After Baseline( e /After Baseline( e /ττhh ), M), MTT, P, PTT cutscuts

• Data: 78 EventsData: 78 Events•• ZZ ττeeττhh (fit): 46(fit): 46±±15 15 evtsevts•• QCD (fit): 28QCD (fit): 28±±14 14 evtsevts•• ZZ eeee (fit): 3.7 (fit): 3.7 evtsevts

W/Z W/Z →→ ττ+ + ττ−− track Multiplicitytrack Multiplicity

••Data: 2345 EventsData: 2345 Events


After Baseline( e /After Baseline( e /ττhh ), M), MTT, , ppTT cuts, OScuts, OSMass (OS data)

Finalizing Z analysis, including theFinalizing Z analysis, including the µµ+ + µµ−− channelchannel

• Data : 47 evts• Z τeτh (fix): 39 evts• QCD (fit): 11±6 evts• Z ee (fix): 2.8 evts

W/Z W/Z →→ ττ+ + ττ−−


•• Tau Definition:Tau Definition:–– Calorimeter Cluster Calorimeter Cluster

R=0.4R=0.4–– RMS(cluster RMS(cluster

size)<0.25size)<0.25–– At least 1 track At least 1 track

Z Z →→ ττ+ + ττ−−


SUSY Searches at SUSY Searches at TevatronTevatron


RPV RPV mSUGRAmSUGRA Search in Decays of Stop PairSearch in Decays of Stop Pair

•• Stop pairs are produced thru RPCStop pairs are produced thru RPC•• Assuming RPV only in the 3rdAssuming RPV only in the 3rd

generation( ):generation( ):kjiijk DQL''

333 in λλ

ττhh selectionselection (106 pb(106 pb--11):):–– ττhh: cluster P: cluster PTT>15 GeV/c, >15 GeV/c, ||ηη|<1.0|<1.0

ττh h ID:ID: number of tracks and number of tracks and ππoo

in a narrow cone, isolation in a narrow cone, isolation energy, etc.energy, etc.

))(()~(,~~

111

hl bblbtttpp

τνν

τ

τ→

→→

t~

t~_

b τ

τbt

~t~

t~_

b τ

τb

l + τh + b + b

Dominant SM BGsDominant SM BGs•Z( ττ) + >2 jets•W( lν) + >3 jets•QCD•t t Wb+Wb•WW/WZ/ZZ

_

Trigger No b-tag for Run I


Additional Selections:Additional Selections:

≥≥ 2 2 jets: Ejets: ET T > 15 GeV> 15 GeV

MMTT(lepton,E(lepton,ETT)< 35 GeV/c)< 35 GeV/c22 HHTT(lepton,(lepton,ττhh,E,ETT)> 70 )> 70 GeVGeV

001.13 1.13 ±± 0.130.13µµ

001.92 1.92 ±± 0.180.18ee

EventsEventsBackgroundBackgroundchannelchannel

2~ GeV/c 93>tmALEPH Limit:ALEPH Limit:


Run II Preliminary ResultsRun II Preliminary Results


Assuming same efficiency, same background level Assuming same efficiency, same background level due to 1 bdue to 1 b--tag, naturally not observing the process tag, naturally not observing the process

141

fb2pb110

)5.05.0(0.10.1

1

122

11

1limit

2limit

222limit111limit

≈

××−

≈

××

=⇒

××=××

−

−

LL

LL

εε

σσ

εσεσ

Mass Limit :Mass Limit :122 122 →→ 188188 GeV/cGeV/c22

2TeV


1,2tan125,90)~(2)~()~( 0

1021

−===≈≈±

µβχχχ

signGeVmmm

Low Low tantanββ SUSY: SUSY: trileptonstrileptons

•• Cuts:Cuts:–– 2e: P2e: PTT>15(10),>15(10),–– 10<10<MMeeee<70<70–– MMTT(e,MET)>15(e,MET)>15–– IsoIso Track PTrack PTT>5,|>5,|ηη|<3|<3–– MET>15MET>15

•• Used 42 pbUsed 42 pb--11

•• No events observedNo events observed•• Expected: 0.0 Expected: 0.0 ±±1.41.4

µχχννχχ ,),~)(~()~)(~(~~ 01

01

021 elllllllpp =→→→ ±

mSUGRAmSUGRA::


Searches for New Mass Searches for New Mass Resonances (“bumps”)Resonances (“bumps”)-- DileptonsDileptons-- DijetsDijets-- DiphotonsDiphotons


No excess have been observed; Data consistent with SM No excess have been observed; Data consistent with SM bkgsbkgs

ee++ee--

µµ++µµ--

New Resonances in High Mass dileptonsNew Resonances in High Mass dileptons


Results in terms of ModelsHigh Mass Dileptons allow searches for new particle productionHigh Mass Dileptons allow searches for new particle production..

RandallRandall--SundrumSundrum GravitonGravitonExcited Graviton in 5 DExcited Graviton in 5 D

Model Free parameters: Model Free parameters: -- Mass MMass MGG-- Coupling k/MCoupling k/MPLPL

Neutral Gauge bosons: Z’Neutral Gauge bosons: Z’Assuming SM CouplingsAssuming SM Couplings


Z’ Z’ →→ µµ++µµ--

•• Typical high energy Typical high energy analysis:analysis:–– EETT>20 GeV>20 GeV–– PPTT>13 GeV>13 GeV–– Calorimeter Calorimeter

IsoIso/E/ETT<0.1(0.2)<0.1(0.2)–– ……–– M(eM(e++ee--), ), M(M(µµ++µµ--)> 150 )> 150

GeV/cGeV/c22µµ++µµ--

Sensitivity: Sensitivity: ~ 1pb (~ 1pb (µµ))~ 1pb (e)~ 1pb (e)

••Total Expected SM Events:Total Expected SM Events:

5.2 5.2 ±± 0.30.3

••Number of Observed Events:Number of Observed Events:

44


ee++ee--

µµ++µµ--

combinedcombined

Z’ Z’ →→ µµ+ + µµ--


µµ++µµ-- ee++ee--

High Mass Dileptons searchesHigh Mass Dileptons searches

95% C.L. Limits on Randall95% C.L. Limits on Randall--SundrumSundrum gravitonsgravitons


505 GeV/c505 GeV/c2219.719.7Run 1A Run 1A

650 GeV/c650 GeV/c227272Run 2 till now…Run 2 till now…640 GeV/c640 GeV/c229090Run 1BRun 1B

95% C.L. Limit (95% C.L. Limit (ee++ee--))∫∫LdtLdt (pb(pb--11))

e+e+µµ comb resultscomb results

Search for Neutral Gauge Bosons & Search for Neutral Gauge Bosons & RandallRandall--SundrumSundrum GravitonsGravitons

----

455 GeV/c455 GeV/c22

----

95% C.L. Limit (95% C.L. Limit (µµ++µµ--))

e+e+µµ comb resultscomb results

Z’Z’


Mass Resonances in Dijets

start with the inclusive jet start with the inclusive jet samples (75 pbsamples (75 pb--11););get the 2 highest Eget the 2 highest ETT jets: jets: EETT(1), E(1), ETT(2);(2);||ηη(1)|< 2.0, |(1)|< 2.0, |ηη(2)|< 2.0;(2)|< 2.0;|tanh((|tanh((∆η∆η)|2)|< 2/3)|2)|< 2/3construct the dijet massconstruct the dijet massFit the dijet mass spectrum Fit the dijet mass spectrum applying a simple applying a simple parameterization of the QCD parameterization of the QCD backgroundbackgroundlooking for statistically looking for statistically significant bumps in the mass significant bumps in the mass spectrum;spectrum;

No evidence for new Particles was found No evidence for new Particles was found on a total of ~ 75 pbon a total of ~ 75 pb--11 of dataof data

we are still working we are still working on calibrationson calibrations


Highest Run II Dijet Mass Event

Run: 152507 Event: 1222318(Oct 4 2002)

Jet 2 Jet 1

EETT(jet(jet 1)= 666 1)= 666 GeVGeVηη(jet(jet 1)= 0.43 1)= 0.43

EETT(jet(jet 2)= 633 2)= 633 GeVGeVηη(jet(jet 2) = 2) = --0.190.19

M(j,jM(j,j) = 1364 GeV/c2) = 1364 GeV/c2coscos θθ* = 0.30* = 0.30z vertex = z vertex = --25 cm25 cm


W‘W‘300 GeV/c300 GeV/c22< M < 410 GeV/c< M < 410 GeV/c22

Excited QuarksExcited Quarks200 GeV/c200 GeV/c22< M < 760 GeV/c< M < 760 GeV/c22

AxigluonsAxigluons or FU or FU ColoronsColorons200 GeV/c200 GeV/c22 < M < 1130 GeV/c< M < 1130 GeV/c22

Color Octet Color Octet TechniTechni--ρρ’s’s260 GeV/c260 GeV/c22< M < 640 GeV/c< M < 640 GeV/c22

E6 E6 diquarksdiquarks280 GeV/c280 GeV/c22< M < 420 GeV/c< M < 420 GeV/c22

Improved Results from CDF Run I limitsImproved Results from CDF Run I limits

Searches for “bumps” and LimitsNo evidence of bumpsNo evidence of bumps

on a total of ~ 75 pbon a total of ~ 75 pb--11 of dataof data

@ 95% C.L.@ 95% C.L.

dijetdijet


Photon and Missing-ET Data Sets


Inclusice Di-γ SearchesAnalysis Selection Cuts:Analysis Selection Cuts:

-- 2 central 2 central γγss with Ewith ETT ((γγ11), E), ETT ((γγ22)> 13 )> 13 GeVGeV-- Applied Cosmic Rays and Beam Halo removalApplied Cosmic Rays and Beam Halo removal

MMγγγγ

EETT

Data Sample: Data Sample: 84 pb84 pb--11


Number of observed Events: Number of observed Events: 13651365

Number of Events with ENumber of Events with ET T > 25 > 25 GeVGeV: : 9595

After all Analysis Cuts:After all Analysis Cuts:


Searches for GMSBSearches for GMSB

2EM Clusters with 2EM Clusters with EETT>20 GeV, |>20 GeV, |ηη|<1.1|<1.1EM clusters with same EM clusters with same vertexvertexJet Cone Jet Cone ∆∆R= 0.7R= 0.7∆θ∆θ ((Jet,METJet,MET)< 2.6)< 2.6jet veto in 1<|jet veto in 1<|ηηdetdet|<1.5|<1.5

Data Sample: 42 pbData Sample: 42 pb--11

Assuming has long lifetime:Assuming has long lifetime:-- two non pointing two non pointing γγ;;-- + MET+ MET

01

~χGG ~~~0

1 γγγχ →→NLSPNLSP


Searches for GMSBSearches for GMSB

•• Messenger mass scale Messenger mass scale MMmm=2 =2 ΛΛ

•• Equiv. number of 5+5 Equiv. number of 5+5 mm--Fields NFields N55=1 =1

•• tantanββ=15 =15 •• sign(sign(µ)µ)>0>0

Run II Limit:Run II Limit:Run I Limit:Run I Limit:

TeVGeVm 52,66)~( 01 >Λ>χ

GeVm 75)~( 01 >χ


Searches for other speciesSearches for other species-- CHAMPSCHAMPS-- LeptoquarksLeptoquarks


LQ production at TevatronLQ production at Tevatronq g q g →→ LQ + LQLQ + LQg g g g →→ LQ + LQLQ + LQq qq q →→ LQ + LQLQ + LQ

Decay Decay LQ LQ LQLQ →→ ll++ll--qqqq, ,

→→ ll±±ννqqqq, , →→ ννννqqqq

SignatureSignature2 high2 high--PPTT Leptons + Jets Leptons + Jets 1 Isolated lepton + E1 Isolated lepton + ETT + Jet+ JetEETT + jets+ jets

1th generation scalar LQ Search


1th generation scalar LQ Search

Expected Expected BkgBkg Events: Events: 3.4 3.4 ±± 3.2 events3.2 events

Observed: Observed: 00

Search performed in the dielectron + jet channelSearch performed in the dielectron + jet channel

M(LQ) < 230 GeV/cM(LQ) < 230 GeV/c22


CHArged Massive ParticleS

used the TOF Detector


number of SM events Expected:number of SM events Expected:2.9 2.9 ±± 0.7(stat) ±0.7(stat) ± 3.1 (sys)3.1 (sys)

Observed:Observed:77

-- Stable Stop model consideredStable Stop model considered-- NLO cross section (m= M(tNLO cross section (m= M(t11))))

at 95% C.L.at 95% C.L.

21 /107)~( cGeVtM <

CHAMPS


non SM Higgs Sectornon SM Higgs SectorSearchesSearches


Search for Doubly Charged Higgs

LEP limit up to 100 GeV/cLEP limit up to 100 GeV/c22 ( prompt and long lived)( prompt and long lived)

HH++++ arises in extensions of SM. arises in extensions of SM. At the At the TeVatronTeVatron HH++ ++ can be paircan be pair--produced (Z exchange) orproduced (Z exchange) orsingly produced (WW fusion).singly produced (WW fusion).Signature: Signature: same sign leptonssame sign leptonsBackgrounds are lowBackgrounds are low


Search for Doubly Charged HiggsSameSame--sign dielectron mass sign dielectron mass

distribution is used to search distribution is used to search for doubly charged Higgs of a for doubly charged Higgs of a given massgiven mass

search region defined as of search region defined as of ±± 10% of Higgs mass10% of Higgs masssignal region above the Z signal region above the Z mass (>100 mass (>100 GeVGeV))low mass region as control low mass region as control region (< 80 region (< 80 GeVGeV))

Very low background (Very low background (0.6 0.6 ))W/Z + misidentified jetW/Z + misidentified jetWZ productionWZ productionopposite signed opposite signed mismis--measured electron measured electron

+0.5-0.1

0 Events observed in 91 pb0 Events observed in 91 pb--11


the Model Independent the Model Independent ApproachApproach


Summary and ConclusionsSummary and Conclusions•• From march 2001 both CDF and D0 are taking data;From march 2001 both CDF and D0 are taking data;

•• Run II Searches for New Phenomena have started;Run II Searches for New Phenomena have started;

•• Competitive SUSY results will need more time, both in terms Competitive SUSY results will need more time, both in terms of luminosity and in detailed understanding of the detector of luminosity and in detailed understanding of the detector efficiencies and backgrounds in the low Eefficiencies and backgrounds in the low ETT regionregion

•• In many cases, setting competitive limits requires large In many cases, setting competitive limits requires large luminosity and going to the low end in energies; luminosity and going to the low end in energies;

•• Present analysis are already improving previous Run I Present analysis are already improving previous Run I results;results;

•• Many new Analysis are underway;Many new Analysis are underway;

•• For the next “several” years, Tevatron is the right place For the next “several” years, Tevatron is the right place where to look for new Physics…where to look for new Physics…


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