CDF: Status Report

Gruppo1, Catania – Sett. 2002 F. Bedeschi, INFN-Pisa

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CDF: Status Report

Status of the TevatronStatus of the CDF detectorFirst results with Run II dataRun IIB upgradesMOF status

Outline

Main Injector

Tevatron

CDF

Franco BedeschiINFN - Pisa Riunione Gruppo 1Catania, 18/9/02


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Tevatron status

Tevatron operation updateLuminosity goals for run 2a:

5-8x1031 cm-2sec-1 w/o Recycler

2x1032 cm-2sec-1 with Recycler

Achieved:2.8x1031 cm-2sec-1 in July ’02

June shutdown to fix p-bar cooling

54 pb-1 delivered until early June35 pb-1 are on tape

10 – 20 pb-1 used for analyses shown at Summer Conferences

February 02 - June 02 period

Sample doubled with new data

Integr. Luminosity

Delivered

On tape

54 pb-1

35 pb-1

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1/1/02 4/1/02 6/30/02 9/28/02 12/27/02

Date

x 1

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30 Peak

luminosity

Slow increase


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0

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150

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1-Jan-02 1-Apr-02 30-Jun-02 28-Sep-02 27-Dec-02

Date

pb

^-1 2002 delivered luminosity

Church planLinerar extr.Quadratic extr.

Tevatron status

Short term plans:Run until new year

Load on Italian group foreign travel increased (shifts, on-call, etc.)Reach goal w/o Recycler:

5-8x1031 cm-2sec-1

1-2 months shutdownComplete Recycler work

Commission and integrate Recycler during 2003

Mostly in parallel with Tevatron colliding beam operation

Expect 100 – 150 pb-1 delivered in 2002 ~ Run 1 data set


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Tevatron Status

Run IBRunIIA Goal

(wo/ recycling)RunIIA

(achieved*)

Protons/bunch 2.30E+11 2.70E+11 1.75E+11

Antiprotons/bunch 5.50E+10 3.00E+10 14.7E+09

Total Antiprotons 3.30E+11 1.08E+12 5.30E+11

Antiproton Production Rate 6.0E+10 2.0E+11 1.1E+11 hour-1

Accumulator->150 GeV efficiency

0.80 0.90 0.80

150 GeV -> Low efficiency 0.80 0.90 0.60Accumulator -> low efficiency 0.64 0.81 0.48Proton emittance (95%, norm) 23 20 16 mm-mrPbar emittance (95%, norm) 13 15 15 mm-mrBeta @ IP 0.35 0.35 0.35 mBeam Energy 900 1000 980 GeVBunches 6 36 36Longitudinal Emittance (protons) 5 3 4 eV-secLongitudinal Emittance (pbars) 5 3 4 eV-secForm Factor (Hourglass) 0.59 0.70 0.65Typical Luminosity 1.6E+31 8.08E+31 2.64E+31 cm-2sec-1

*”Achieved” refers to simultaneous performance. Best individual parameters are higher.


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Injection and acceleration

Shot 1583 showing:Loading of 36 proton

bunches at 150 GeVPoor lifetime at 150 GeVSignificant beam loss on

accelerationLoading of 9x4 antiproton

bunches at 150 GeVDitto

Luminosity potential3.6E31 if acceleration

losses eliminated, >4E31 if lifetime improved.

antiprotons

protons

Beam current


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Tevatron Status

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Church plan

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p-bar transfer efficiencyChurch plan

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^9 protons/bunch

Church plan


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CDF data taking efficiency

Avg. efficiency in data taking ~80%Goal is > 90%Reached already in

several occasions


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Status of the CDF Detector

New

Old

Partially new

Forward muonEndplugcalorimeter Silicon and drift

chamber trackers

Central muonCentral calorimeters

Solenoid

Front endTriggerDAQOffline

TOF


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CDF Detector Status

Detector:All systems installed and commissioned

SVX II much improved during June shutdown

10/12 ISL cooling lines cleaned after June shutdown, will finish in January ‘03

DAQ and trigger:Running physics trigger table with > 100 trigger paths since

February ‘02SVT very successful and improving

L2 problems largely solved


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Detector Performance Trigger:

Goal rates for L = 2x1032

L1/L2/L3 = 50,000/300/50 Hz Typical now for L ~ 1031

L1/L2/L3 = 8,000/250/30 Hz

DAQ Logging data at the planned rate of ~ 20 Mbyte/sec

Offline: Data is reconstructed in quasi real time on a dedicated

production farm We take data at ~ same rate as goal luminosity!

Data analysis needs are little affected by low luminosity

3962.5


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Detector Performance

Commissioning:L00 > 95%SVXII > 90% ISL > 80%

Completing cooling work

% of silicon ladders powered and read-out

June shutdownISL almost fixed

* Concern about loss of connection to z-side in special situations. 4 ladders affected recently


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Silicon detectors:Typical S/N ~12Alignment in R- good

First reliable R-z iteration in production soon


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TOF resolution within 10 –20% of design value Improving calibrations and

corrections

TOFS/N = 2354/93113

S/N = 1942/4517


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XFT: L1 trigger on tracksfull design resolution

pT/p2T = 1.8% (GeV-1)

= 8 mrad

Efficiency curve:XFT cut atPT = 1.5 GeV/cXFT

track

Offline

track


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Secondary VerTex L2 trigger Online fit of primary VtxBeam tilt alignedD resolution as planned

48 m (33 m beam spot transverse size)

15% efficiency increase after downloading updated associative memory patterns (mostly Italian work)

NOT available in analyses that follow

=48 mOnlinetrackimpactparam.


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Physics with CDF-II

Use data to understand the new detector: energy scales in calorimeter and tracking systems detector calibrations and resolutions tune Monte Carlo to data

Use data to do physics analyses Real measurement beyond PR plotsQuality of standard signaturesRates of basic physics signalsSurprisingly some results are already of relevance in spite

of the limited statisticsSeveral CDF presentations made in the parallel sessions

In the following brief/incomplete summary of a lot of work


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Data Sample

Stable physics trigger table established since February ’02Summary of data used for ICHEP2002:

Data period: January – June, 2002 Delivered luminosity: 33.0 pb-1

Live (to-tape): 23.5 pb-1

“Good runs”: 23.3 pb-1

“Good runs” with all systems ~ 10.0 pb-1 (cfr. 110 pb-1 Run 1)

Radiation induced COT/SVX VME power supply failures (fixed!)

Instabilities in Silicon readout (much improved)

New data are waiting for update of production code for processing. Will start full reprocessing in October.


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EM Calorimeter scale

638 Z e+e in 10 pb-1

(M) ~ 4 GeV

Check Z mass in data and simulation after corrections Central region:

Mean: +1.2% data, -0.6% sim.Resolution: +2% simulation

Forward region (Plug):Mean: +10/6.6% data, +2.0% simulationResolution: +4% simulation

Central-central

Central-West plug

Central-East plug

NZ = 247

NZ (W+E) = 391


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Measurements with high Et e±

Uncorrected Z e+e angular distributions and asymmetries

Measurements compared with Pythia/CTEQ5L prediction

BackBack to index


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Clear evidence for W e signal Isolated central electronEt > 25 GeV, Et >25 GeV


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Good modeling of observed W e distributions


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MET resolution

Minimum bias events Run 1: 0.53/ Et with forward cal. Use ||<4.2 Run II: 0.60/ Et with plug only ||<3.6

With miniplug ||<5.5


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W cross section:W*BR(We) (nb) =

2.60±0.07stat±0.11syst ±0.26lum

Consistent with Run 1 results rescaled for higher energy: 2.72±0.02stat±0.08syst ±0.09lum

(use Sterling et al. NNLO predictions)

Nr. Candidates: - 5547 in 10 pb-1

Background:- QCD: 260 ± 34 ± 78- Z ee: 54 ± 2 ± 3- W: 95 ± 6 ± 1

0.16 now!0.10 soon!


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Measurements with high Et ±

Clear evidence of Z +

Signal shown for OS muons detected in both inner and outer muon chambers

- 57 candidate events in 66<Minv<116 range- NZ = 53.2±7.5 ±2.7

1

2


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Good modeling of observed W distributions

Measure (W) and R=(W)/(Z)

MET

Longitudinalbeam profile


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MT

W cross section:W*BR(W) (nb) =

2.70±0.04stat±0.19syst ±0.26lum

Consistent with Run 1 results rescaled for higher energy: 2.41±0.08stat±0.15syst ±0.16lum

(use Sterling et al. NNLO predictions)Nr. Candidates:

- 4561 in 16 pb-1

Background:- QCD: 104 ± 53- Cosmics: 73 ± 30- Z : 247 ± 13- W: 145 ± 10

R=(W)/(Z) = 13.66±1.94stat±1.12syst

Consistent with Run 1 results


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W

Evidence for typical decay multiplicity in W selections

Back to index


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Measurements with low Et ±

trigger improvedpT

> 2.0 1.5 GeV

> 5° 2.5°

Observed rates are consistent with expected increase due the lowering of the thresholds

13 pb-1

NoSilicon100k

= 21.6 MeV

Centralmuons only

15 MeV with Silicon


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Inclusive B lifetime with ’sFit pseudo-c =

Lxy*FMC*M/pT

distribution

Output: b lifetime, fraction of from Bc=458±10 stat. ±11 syst. m

(PDG: 469±4 m)

from B = 17% (pT > 4 GeV)

Resolution function from large prompt componentR = narrow + wide Gaussian (19%)

+ exponential tails (1.2%)Scale factor on error returned from

vertex fit 1.069

Resolutionfunction

~ 46%


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Use ’s to understand E-loss and B-field corrections

Check with other known signals

Raw tracks

Correct for material in GEANT

Tune missing material ~20%

Add B scale correction

D0

1S

2S3S


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(2S)

Bu

CDF 2002 PDG/(2S) 3686.43±0.54 0.86 6.00

Bu 5280.60±1.70±1.1 0.77 4.05

Bd 5279.80±1.90±1.4 0.17 4.72

Bs 5360.30±3.80± -1.81 1.902.102.90

CDF) PDG)

B masses:(2S)J/ (control)Bu J/

Bd J/Bs J/ More mass plots

lifetime

semi-leptonic B


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More mass plots:Bd, Bs

Bs

BackBack to index

BdK*0


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B+ lifetime:B+ J/ K+Fit results:

c=446±43±13 m

( PDG/ = 1.2)

Res. scale factor 1.16

Conservative systematic error

# B+ ~ 154

BackBack to index


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Measurements with inclusive leptons

Find large samples of semileptonic B decays

BackBack to index


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Measurements with jets

Raw Et only: Jet 1: ET = 403 GeV Jet 2: ET = 322 GeV


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Expectations: Increase max. energy reachStudy both central and forward

New physics is mostly centralPdf’s affect both regions

Current work:Accumulate large samplesUnderstand energy corrections

E-scale, jet shapes, MC tuning

Run 1Run 2aRun 2b

Cen

tral

jet

sF

orw

ard

jet

s


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Jet distr. from dataRaw ET

Each trigger

rescaled for

pre-scale factor

Fixed cone algorithm: R = 0.7


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Hadronic Energy Scale

Use J/ muons to measure MIP in hadron calorimeters (Run II)/(Run 1) =

0.96±0.005

Gamma-jet balancing to study jet response fb = (pT

jet – pT)/pT

Run Ib (central): fb= -0.1980 ± 0.0017

Run II (central): fb= -0.2379 ± 0.0028 Plug region corrections in progress

centralcalor. Plug regionPlug region

fb = (4.0 ±0.4)%

q

g q


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Jet shapes:Narrower at higher ET

Calorimeter and tracking consistent

Herwig modeling OK

16 pb-1 used for this study


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Measurements with hadronic b triggers

L2 trigger on 2 tracks: pt > 2 GeV

|D| > 100 m (2 body)|D| > 120 m (multibody)

Swamped by D mesons! But see B’s as well…. CDF Run 2 preliminary

D0 K

ND=56320

10 pb-1

D+Ds

+ Ds± - D± mass difference

Both D (KK)m=99.28±0.43±0.27 MeV

PDG: 99.2±0.5 MeV

Systematics dominated by background modeling

23601350


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Measurements with hadronic b triggers(important Italian contribution)

Measure ratios of CKM suppressed decays(DKK)/(DK) = (11.17±0.48±0.98)% (PDG: 10.84±0.45)

Main systematics (8%): background modeling

(D)/(DK) = (3.37±0.20±0.16)% (PDG: 3.76±0.20)Main systematics (4%): relative acceptance

Signal: 5670 Signal: 2020

L = 10 pb-1

CDF Run 2 preliminary CDF Run 2 preliminary


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Measurements with hadronic b triggers

D mesons: What fraction from B?

D0: 16.4-23.1%

D*+: 11.4-20.0%

D+: 11.3-17.3%

Ds+: 34.8-37.8%

GaussianK0S

Range of fract. from B using two extreme resolutions functions: - single gaussian - parametrization from K0

S sample


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Measurements with hadronic b triggers(important Italian contribution)

Hadronic B decays observed Yield lower than expected (silicon coverage/SVT efficiency > x 3) S/N much better than expected

Better S/N dilution compensates reduced statistics

#B+ = 56±12

#B = 33±9

B+ D0 +B h+ h


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Conclusions on Tevatron and detector status

Tevatron is slowly improvingThe CDF detector is fully functional and accumulating

proton anti-proton dataUnderstanding of detector is advancedMany early physics results

sometimes competitive in spite of limited statistics

Ready to exploit full Tevatron potential as luminosity increases


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Run 2B Upgrades

Progetti, motivazioni e richieste complessive degli upgrades per il run 2B discussi in dettaglio nella riunione del Maggio scorso

Progetti che coinvolgono gli italianiNuovo tracker a microstrip (Padova, Bologna, Roma1)Nuovo preradiator (Pisa [Siena], Roma1, Pavia)Aggiunta di timing sui calorimetri elettromagnetici (LNF)


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SVX IIB

Overall design completeBasic element (stave) is near being

built and tested


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Cooling tubes

Mounting holes

Chips

Hybrid Pitch Adapter

Sensors

SVX IIB – The Stave

Wing Cable

Mini PC• 2 sensors/hybrid = 1 module• 3 modules/side• 1 MPC/stave• 1 readout unit/stave• Stave is 66 cm long

Mounts


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SVX IIB R&D advancing fast All stave components available

SVX4 chip, Hybrid, detector, special cables, mechanics, mini-port-card First functioning prototype in October 2002

SVX4 chip

Hybrid

sensors


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Preshower


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Preshower

Basic design understood Important Italian group contributions to R&D

Optimization of tile performanceSimplification of tile construction

Current construction model: Italian groups build basic tile for both preshower

and crack chamberR&D in progress to establish some design

choices:Best scintillator (Dubna/Bicron)Best fibers (Kurarai/PoliHiTech)Coupling of WS fibers


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Preshower

Testing of tiles in progress in Pisa

Test tile

Dubna scint.PoliHiTech fiber

~11 p.e./MIP


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EM Timing

Progress on inductive signal splittersTested during June shutdown operating CEM calibration

LED flashersConfirmed that introducing the splitters only delays the PMT signal by 800 psec


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EM Timing

Want to build as much of the system possible before the January shutdown (shutdown could be later …)

LNF responsible for ASD board, transition board and cables from ASD to TDCTransition board design complete Iterating with FNAL on ASD modifications required


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Run 2B Upgrades

Review degli upgrades per il run 2B continua a FNAL Director/technical review 12 Agosto scorso Finalmente DOE baseline review inizia il 23 settembre

Il comitato invia le raccomandazioni al DOE (P. Rosen – Associate Director for High Energy Physics at Office of Science) che decide poi cosa fare sulla scala dei tempi della meta’ di Novembre

Partecipero’ alla review e dovro’ descrivere quale livello di appoggio l’INFN e’ disposto a dare al progetto

Richieste italiane a bilancio per 2003 includono una parte della produzione e sono consistenti con il piano di Maggio 2002 Importante un parere favorevole della commissione anche se condizionato

all’approvazione del DOE e alla finalizzazione di alcune scelte tecniche


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Run IIB Upgrades

Quadro finanziario del run 2BIl totale M&S+ R&D e’ aumentato solo per la definizione

degli impegni di Bologna (+38 k€) rispetto a Maggio 2002

Plan M&S + Total Funded Requested SJ ProjectProject Subproject Sezione May '02 R&D funded 2002 2003 2003 FTE FTESilicon Mechanics Bologna 38 473 38 5.1 1tracker Chip/PS Padova 335 55 25 130 130 3.1

Trigger Pisa 50 0 0.5Trigger Trieste 50 0 0.5

PreshowerScintillator - fibers- PS - Cables

Pisa 202 202 10 10 120 95 3 2

Pavia 0 0.5Roma1 0 0.5

EM timing LNF 144 144 10 10 134 124 1.9 1.9CSX Scintillator Pisa 80 80 80 80 1.5 1.5Totali 899 899 155 125 422 349 10 10


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MOF 2003

Alla riunione di Maggio del FRC discusso un “ragionevole” bilancio per Operations di 3.1 M$

Naturale contributo italiano (stimato su 82 fisici/66 FTE) $ 410 k

Questo e’ il numero usato per i preventivi 2003 (415 k€)

La certificazione della composizione del bilancio complessivo deve essere fatta da uno “scrutiny group”Mont promette che formera’ presto questo “scrutiny group” Il carico da spartirsi potrebbe crescere!

Bisogna mettere da parte almeno i 415 k€ richiesti

Una parte dovra’ essere SJ alle delibere dello scrutiny group e del FRC nel prossimo anno

Saggio prevedere lo sblocco a Giugno 2003 quindi il finanziamento attuale deve essere consistente

Documents

CDF: Status Report