Pisa: Settembre 2003F. Bedeschi, INFN-Pisa 1 CDF: Prospettive e upgrades Stato Tevatron e CDF ...

Pisa: Settembre 2003 F. Bedeschi, INFN-Pisa

1

CDF: Prospettive e upgrades

Stato Tevatron e CDF Risultati recenti e prospettive Run IIB:

Situazione generale Stato progetti a partecipazione italiana L’upgrade del CPR (v. presentazione S. Lami)

L’upgrade di SVT (v. presentazione di P. Giannetti) Calcolo (v. presentazione S. Belforte) Sommario richieste finanziarie

SOMMARIOINFN - Riunione della

CSN 1

Lecce

24 Settembre 2003

Franco BedeschiINFN-Pisa


2

TeV Luminosity(current situation)

Peak luminosity Best 5.2x1031

Delivered/on tape330/260 pb-1

Delivered

On tape

5x1031

Luminosity

Integrated

Initial

instantaneous


3

Tev 2003 Luminosity

Goals for 2003 Base goals:

200 pb-1 in FY 200310 pb-1/wk end of 2003

5.4x1031 typical

Stretch goals: 320 pb-1 in FY 200315 pb-1/wk end of 2003

7.6x1031 typical (~max achievable without Recycler)

Integrated luminosity goal achieved, but …

Half of shutdown in FY04Avg. lum. lower than predicted

FY04: Double data set

~150 pb-1

As of 5/6/03

~250 pb-1

As of 9/3/03


4

CDF operations

All CDF operating reliably Silicon stable

Data taking efficiency high 80-90% typical

Some limitations in L1 trigger output rate < 20 kHz achieved ~ 50 kHz design

Force prescale of B physicsProblem gets worse at higher luminosity (more in Paola’s talk)

Requires work on DAQ/L2 Massive Italian effort on SVT L00 aligned and improving resolution

Now

Hadronic Bs trigger


5

SVT trigger improvements in 2003 (at 0 cost)

Whatever could be done with no upgrade has already been done! 4/5 : 1.5x efficiency, more uniform coverage, avoid efficiency change while

single SVX ladder are out of DAQ for a few days - Carosi 3/3 : recover another SVX wedge/barrel - Carosi AMS firmware optimization : saves 700nsec – Belforte Avoid fitting tracks 1.5<Pt<2 : 30% less to fit – Belforte Skip events that do not require SVT al L2 (hight Pt jets, MET and leptons):

saves 1 microsec (more as L increases) – Belforte, Rescigno Road Warrior: removes duplicate fit combination for 4/5, saves 30% of time

Algorithm, timing studies, simulation, proof of feasibility - Annovi, Belforte, Catastini, Cerri

Firmware – Spinella (this fall)

Money (~60k$) - Fermilab


6

Results from L00

Clear D resolution improvements with L00Most gain at low pt and in areas with much materialStill room for improvement of alignment


7

Physics Results

Data used for summer conferences 2003Data set collected February 02 – May 03230 pb-1 delivered, 170 pb -1 on tape, <140 pb -1 used for analysis

now 330 pb-1 delivered, 260 pb-1 on tapeSome preliminary results available at higher statistics

Much progress since May 03 Italian group is giving key contributionsWill cover only highlights with emphasis on Italian work

Top quark

EWK

B physicsDiscuss Bs mixing reach as example of trigger issues


8

Italian group contributions

B/charm physics Topics: Bhh (ACP, BR), bp search, BsDs & lDs (preparatory to Bs

mixing), Bs BdK*, BK (ACP, BR), D0hh (BR, ACP) Groups involved: Padova, Pisa, Roma, Trieste

High pt physics Topics: Zbb, Higgs searches, top physics, hadronic top, top backgrounds,

b-tagging, W+jets, forward W’s Groups involved: Bologna, Padova (Trento), Pisa, Roma

Responsibilities: Conveners of B physics subgroups Convener of top group Members of important review committees (eg. Higgs reach)

Most work in close cooperation with other non-Italian groups Most work in close cooperation among the Italian groups


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Top (di-leptons)

2 high pT leptons (e,iso track)

2 central jetsLarge Missing ET

HT: scalar sum of all the measured

“objects” ET’s (leptons,jets)


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Top (l+jets)

1 high pT lepton(e,)

3 central jets

Large Missing ET


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Top x-section

(syst)(stat)7.6 1.51.9

3.83.1

1.7(syst)3.4(stat)7.3

0.9(syst)1.9(stat)5.3

2.1(syst)1.8(stat)5.1

0.9(lum)(syst)(stat)8.7 2.72.0

6.44.7

0.8(lum)(syst)(stat)8.1 1.61.4

2.22.0

0.5(lum)(syst)(stat)4.6 2.12.0

3.12.7

1.1(lum)(syst)(stat)11.4 2.01.8

4.13.5

0.8(lum)(syst)(stat)8.0 1.71.5

2.42.1

0.7(lum)(syst)(stat)7.4 2.11.8

4.43.6

1.1(lum)(syst)(stat)10.8 2.12.0

4.94.0


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Top mass

212.79.4 GeV/c 7.1(syst)(stat)177.5

Mass in lepton+jets channelwith a b-tagged jet Mass in dilepton

channel217.4

16.9 GeV/c 7.9(syst)(stat)175.0

CDF RunII preliminary, 108 pb-1CDF RunII preliminary, 126 pb-1

6 events

Data 22 evts


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Hadronic top

Work in progress!Top mass distribution

with 165 pb-1 of double tagged multi-jet events

Background from 0 tag sample

Main goals:Top x-section in hadronic channel

Top mass measurement in hadronic channel


14

Zbb

Work in progress~70 pb-1Update soon with

>x2 statisticsGood

understanding of sample composition

Trigger updatedCritical signal for:

Top mass accuracy Improving bb di-jet

mass resolution

2 tags2 tagssubtracted

1 tag 1 tagsubtracted


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Forward W’s

Current blessed result with ~70 pb-1

Update soonWorking on cross

section systematicsGoals:

Measure x-section in forward region

W = 2.81±0.39 nb

Include forward W’s in top and other high pt analyses


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3870

narrow resonance at ~ 3870 MeV reported by Belle at Lepton-Photon 34.4±6.5 events May be an L=2 cc state

CDF has searched for this state in its large sample of (>2M) and found it too! 8.5 effect Hint seen in run 1 data


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B lifetimes

Complete set of lifetime measurements with exclusive B statesBu, Bd show reliabilityBs already better than WASpecies Bu Bd Bs

b

CDF (ps) 1.63±0.050±0.04 1.51±0.060±0.02 1.33±0.14±0.02 1.25±0.260±0.10HFAG (ps) 1.65±0.014 1.53±0.013 1.44±0.17 1.23±0.077

Bu Bs


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Bs lDs

Collecting the high statistics samples of B lepton + Charm Still working on lifetime

systematics This sample can be used also for Bs

mixing


19

Hadronic B’s (2 body) Yields doubled

Trigger work! 871 events in peak! Now eff ~ 6 pb

Measurements with 68 pb-1 only: Will update for winter

conferences

Simulation

BdKBsKK

Bd

BsK

= 5.252(2) GeV/c2

= 41.1(1.9) MeV/c2

M()

L~180 pb-1

Tight cuts871 eventsLoose cuts1766 events


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Hadronic B’s (two body)

Current measurements and projections (68 pb-1) fs BR(BsKK)/fd BR(BdK) = 0.74±0.2±0.22

First measurement! CDF only

Expect 10% error by next summer

BR(Bd)/BR(BdK) = 0.26±0.11±0.06

Belle/BaBar errors: 0.033/0.035 LP2003

Could reach above accuracy by fall 2004

ACP(BdK) = 0.02 ± 0.15 ± 0.017

Belle error: 0.035 LP2003

ACP(Bd) :

need ~2 fb-1 for measurement to 10o

10o is still statistics limited

Expect ~x2 error reduction with current statistics (180 pb-1) Systematic too with better dE/dx


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BR(B± K±) at CDF

First time at CDF : B± K±

BR( B± K± ) ———————— = 0.0068 ± 0.0021(stat.) ± 0.0007(syst.) BR( B± J/K± )

23 ± 7 events 120 pb-1


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Hadronic B’s (many bodies)

Understanding backgrounds and yields with large MC samples

B+


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Hadronic B’s (many bodies)

Understand hadronic Bs yield. Measure BR: NEW! BR(BsDs) = (4.8±1.2(stat)±1.8(BR)±0.8(sys)±0.6 (fs/fd))x10-3


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Bs mixing expectations

Expectations extrapolating from current data Still large uncertainties on:

Final event yield (depends on upgrades)

Max lifetime resolution achievable

Max D2 (tagging power) achievable

Make very conservative assumptions!

Sensitivity = ms/ 2 sensitivity for = 15 ps-1 with ~0.5 fb-1

Surpass current world limit

5 sensitivity for = 18 ps-1 with 1.7 fb-1

5 sensitivity for = 24 ps-1 with 3.2 fb-1

Current constraints: Lower limit LEP+SLD: ms >15 ps-1 WA

Constraints from global fits: ms = 21 ± 4 ps-1 (Durham 2003)


25

Bs yield

At higher luminosity need more L1 BW to preserve current yield

Expect ~2000 ev/fb-1 using additional Ds decay modes

Current performance

4x1031 6x1031

8x1031


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Tev goals beyond 2003

Fermilab has scaled down its plans for luminosity in June 2003 Silicon upgrade canceled!

No long shutdown in 2005 Design plan max luminosity: 2.94x1032

No recycler ~ base plan

Year Base plan luminosity/yr (fb-1)

Design plan

Luminosity/yr (fb-1)

FY02 0.08 0.08

FY03 0.20 0.22

FY04 0.31 0.38

FY05 0.39 0.67

FY06 0.50 0.89

FY07 0.63 1.53

FY08 1.14 2.37

FY09 1.16 2.42

Total 4.41 8.56

0

1

2

3

4

5

6

7

8

9

0 1 2 3 4 5 6 7 8 9 10

End FY

fb-1

Base plan

Design plan


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Impact on Higgs reach

Reach for SM Higgs and other “new” physics searches affected by factor 2-3 reduction in expected total integrated luminosity (relative to 15 fb-1)

4.41 fb-1 base plan

8.56 fb-1 design plan

Sensitivity re-evaluated in June 2003Slightly better

Retain sensitivity to a low mass SM Higgs


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Impact on physics program

Even 2 fb-1 represents x20 more luminosity than run 1Major CDF/D0/Tevatron upgrade was fully justified by this

expected integrated luminosity

We will get more than 2 fb-1, but not 15 fb-1 as the lab made us hope for some time

Important to make best of available luminosityAll other upgrades needed for this

CDF is re-evaluating physics priorities and role of upgrades

Full support from Witherell, P5 and PAC on all other upgrades


29

Upgrade del rivelatore al Silicio per CDF Run IIb

•Il progetto e’ stato cancellato in fase di Preproduzione:Tutte le parti gia’ a SiDet in quantita’ (~15% del totale)Sensori da HPK al terzo mese di produzione (~350 a SiDet)“On schedule” per finire a Maggio ‘05 (18 mesi di anticipo rispetto alla data ufficiale di Nov ‘06).Ottimi risultati su svx4 chip e ibridi

Costi stimati ridotti notevolmente

•Progetto di chiusura:Costruire 15 staves => installare nel prototipo di Barrel => el./mech. testsCostruire 5 moduli di L0 => installare nel CF support structure => el./mech. tests Installare L0 nel Barrel => e./mech. TestsCirca 6 mesi con costi minimi (quasi tutto labor cost)


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Summary of upgrade projects

Calorimetry upgrades New central preradiator (CPR2) (see talk by Stefano Lami) (*) Add timing to EM calorimeters (*)

Tracking upgrades Full replacement of all silicon systems inside ISL (*)

Trigger upgrades Improve resolution of L1 track trigger Rebuild global L2 Increase event builder throughput SVT upgrade (RW & associative memories) (see talk by P. Giannetti) (*New)

DAQ upgrades TDC upgrade (speed up chamber readout) Double SRC (speed up silicon readout) CSL upgrade (double data logging bandwidth)

(*) Activities with contributions from Italian group


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Requests for upgrades

Silicon NONE Save 130 kEuro in 2003 + 150 kEuro in 2004! Save 100 kEuro for additional SVT merger boards

CEM timing NONE Funding complete

CPR2 (see Lami’s talk): 100 kEuro in 2003 from SJ (Pisa) 82 kEuro in 2004 (Pisa)

SVT ass. Mem. Board upgrade (NEW see Giannetti’s talk) 120 kEuro in 2004 (Ferrara) 60 kEuro in 2004 (Pisa) 150 kEuro in 2005

Total cost 330 kEuro


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Group composition

CDF Italian group has grown by 20% relative to last yearGood to have data!Future activities important to keep the group together

2004 2004 2003 2003 2002 2002Fisici Tecnol. Totale Totale Totale Totale Totale Totale

Sezione Numero FTE Numero FTE numero FTE numero FTE numero FTEBologna 8 6.7 1 0.5 9 7.2 9 7.4 9 7.3CDF1-LNF 1 1 0 0 1 1 1 1 1 1Ferrara 3 0.7 1 0.1 4 0.8LNF 6 4 1 0.4 7 4.4 6 3.7 6 4.4Padova 15 11.3 0 0 15 11.3 13 9.2 14 9Pavia 1 1 0 0 1 1 1 0.7 1 1Pisa 32 26.9 11 6.6 43 33.5 33 25.4 28 20.6Roma1 11 9.5 2 1.5 13 11 13 11.1 12 10.1Trieste 5 3.6 0 0 5 3.6 5 3.7 3 2.1Udine 3 2.3 1 0.5 4 2.8 3 1.8 3 1.8Totale 04 85 67 17 9.6 102 76.6Totale 03 73 58.5 11 5.5 84 64.00Totale 02 68 52.2 9 5.1 77 57.3


33

FY 2003 missioni/consumi

Sezione MI ME ConsumiNuovi fin. Nuovi fin. Sblocchi Sblocchi

BO 17 10LNF 16LNF-dot 7PD 35PV-dotPI 5 50 100RM1 40TSUD 1 25


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MOF

No developments since last meeting of IFC in AprilNew IFC meeting deferred to end of October (maybe)

Propose to fund as last year (250 kEuro)20% increase in size of CDF Italian group overcompensates change in dollar exchange rate

There may be a need for adjustment after the October IFC meeting if some agreement is found


35

Summary of 2004 requests

Missioni Interne Missioni Estere Consumi Inventario Costruzione apparatiTotaliSEZ. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn.

2004 2003 2004 2003 2004 2003 2004 2003 2004 2003 2004 2003BO 7.2 7 134.2 113.5 30.8 30 0 15 15 11 187.2 176.5FE-DOT 2 5 0 0 120 127 0LNF 4.4 4 100.6 91 11.6 7 5 4 0 120 121.6 226LNF-DOT 2 1 40 39 10 1.5 0 0 0 0 52 41.5PD 11.5 10 214.7 196 22.2 25 11 5.5 0 0 260.4 239PI 30 20 624.5 525 290 290 46 11.5 142 110 1137.5 958.5PV-DOT 2 2 27 8 2 1 0 0 0 0 31 11RM 13 6 308 233 60 18 20.5 12 0 0 401.5 269TS 6 4 100.5 61.5 11.5 7 291.5 267.5 0 0 413.5 340UD 6 3 97 88 8 4 6 1 0 10 119 106TOTALE 84.1 57 1651.5 1355 446.1 383.5 380 316.5 277 251 2850.7 2367.5

Includes all adjustments made after presentation of estimates in July 2003


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37

TeV Luminosity(old slide May 13, 2003)

Peak luminosity still low but improvingBest 4.2x1031

Delivered/on tape230/170 pb-1

Delivered

On tape

4x1031

LuminosityIntegrated

Initial

instantaneous


38

Tev luminosity

7 pb-1 /wk typicalPeak 9.7 pb-1


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Tev goals beyond 2003

Fermilab long range plan (M.Witherell P5 presentation – March 26, 2003)


40

Status of CDF

Detector: All systems commissioned and taking good quality data

ISL: more cooling lines opened during the January shutdown!

Only 1 cooling line (4% of total) remains plugged

Silicon (hardware/trigger) in general much more stable and reliable~90 % of all silicon systems currently taking dataL1 accept rate limitation removedSome unrecoverable damage is piling up

• % powered

• % good

• % bad

• % error rate

January 03

shutdown


41

New silicon

Status similar to May 03


42

Status of CDF

Early June 2002 March 2003

Silicon trigger coverage

http://b0dap61.fnal.gov/cgi-bin/e-log/notebooks/2002/Wed_Jun_19_2002_Eve.233037.ps


43

Status of CDF

SVX electronics very delicate Still learning how to

protect it from further damage

Understand now much better sources of damage

Some concern about possible continuous degradation over long periods of time


44

L1 trigger

Require trigger deadtime < 5% B triggers ~ 80% of L1, 50% L2/3

Fake rates higher than predictions

Level 1 Predictions

0

5

10

15

20

25

30

35

40

45

50

0 10 20 30 40 50 60 70 80 90 100

Luminosity (e30)

Ra

te (

kH

z)

Predicted L1 rateVs luminosity

CurrentMax. lum

~18 kHz

18 kHz

4/4


45

Bs trigger efficiency

Hard work has improved yields significantly


46

Additional Bs channels

Bs Ds (Ds )

~30 events


47

Measuring ms

Ingredients:S = signal yieldS/B = signal/Backgroundt = proper lifetime resolution

D2 = flavor tagging power = flavor tagging efficiency

D = flavor tagging dilution = 1-2w (w = flavor mistagging probability)

22

2

2

s tmS D SSignificance e

S B


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Bs mixing

Lifetime resolution67 fs NOW50 fs with event by event vertex and L00

Flavor tagging studies in progressLarge errors still on D2 measurementsTotal ~ 6% in Run 1 sin(2) analysisNow we have kaon tagging, but much more materialNN like techniques could help tooAssume (very conservatively!):

D2 = 4% now (only SST, jet charge, lepton tags)

D2 = 5% later after including kaon tags


49

Bs mixing

5 measurement Feasible with moderate improvements in 2 fb-1

Can beat current world limit with 500 pb-1 and “current” performance

Harder than expected: needs lot of work and luminosity/detector upgrades

0

5

10

15

20

25

30

35

0 500 1000 1500 2000

Moderate improvements

SM central value

Now

xs

pb-1


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Tevatron goals beyond 2003

During the June PAC review the issue of the usefulness of the silicon upgrade was seriously considered, but deferred to after the July accelerator reviewOther upgrades regarded as “…already desirable at

considerably lower luminosities.”July DOE review of accelerator (Lehman) found the

design goals ambitious and the base goals rather safeOn September 3rd Witherell cancels silicon upgrade, but

Run II will still have highest priority. Resources recovered will be spent to improve Tevatron

Committed “…to complete the non-silicon parts of the CDF and D0 upgrades.”


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Impact of new luminosity expectations

Impact of smaller luminosity expectations can be reduced by appropriate upgradesMost run IIb upgrades also help to make the best use of

available luminosityTrigger/DAQ upgrades:

Reduce fakes and therefore prescales for all B physics triggers

Increase bandwidth gaining effective cross-section for prescaled triggers

CEM timing and CPR upgrade:Improve S/N allow reduced trigger/analysis thresholds for high pt

CDF and the laboratory fully support all the non-silicon upgrades

Pisa: Settembre 2003F. Bedeschi, INFN-Pisa 1 CDF: Prospettive e upgrades Stato Tevatron e CDF ...

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Transcript of Pisa: Settembre 2003F. Bedeschi, INFN-Pisa 1 CDF: Prospettive e upgrades Stato Tevatron e CDF ...