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CDF. Tevatron. Main Injector. CDF: Status Report. Outline. Franco Bedeschi INFN - Pisa Riunione Gruppo 1 Catania, 18/9/02. Status of the Tevatron Status of the CDF detector First results with Run II data Run IIB upgrades MOF status. Tevatron status. Tevatron operation update

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Cdf status report

CDF

Tevatron

Main Injector

CDF: Status Report

Outline

Franco Bedeschi

INFN - Pisa

Riunione Gruppo 1

Catania, 18/9/02

  • Status of the Tevatron

  • Status of the CDF detector

  • First results with Run II data

  • Run IIB upgrades

  • MOF status

F. Bedeschi, INFN-Pisa


Tevatron status

Tevatron status

  • Tevatron operation update

    • Luminosity 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 June

        • 35 pb-1 are on tape

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

          • February 02 - June 02 period

          • Sample doubled with new data

Slow increase

Integr. Luminosity

54 pb-1

Delivered

On tape

35 pb-1

F. Bedeschi, INFN-Pisa


Tevatron status1

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 shutdown

      • Complete 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

F. Bedeschi, INFN-Pisa


Tevatron status2

Tevatron Status

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

F. Bedeschi, INFN-Pisa


Injection and acceleration

Injection and acceleration

Shot 1583 showing:

Loading of 36 proton bunches at 150 GeV

Poor lifetime at 150 GeV

Significant beam loss on acceleration

Loading of 9x4 antiproton bunches at 150 GeV

Ditto

Luminosity potential

3.6E31 if acceleration losses eliminated, >4E31 if lifetime improved.

Beam current

antiprotons

protons

F. Bedeschi, INFN-Pisa


Tevatron status3

Tevatron Status

F. Bedeschi, INFN-Pisa


Cdf data taking efficiency

CDF data taking efficiency

  • Avg. efficiency in data taking ~80%

    • Goal is > 90%

    • Reached already in several occasions

F. Bedeschi, INFN-Pisa


Status of the cdf detector

Status of the CDF Detector

Central calorimeters

Solenoid

Central muon

New

Old

Partially

new

Front end

Trigger

DAQ

Offline

TOF

Endplug

calorimeter

Silicon and drift chamber trackers

Forward muon

F. Bedeschi, INFN-Pisa


Cdf detector status

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 ‘02

      • SVT very successful and improving

      • L2 problems largely solved

F. Bedeschi, INFN-Pisa


Detector performance

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

2.5

396

F. Bedeschi, INFN-Pisa


Detector performance1

Detector Performance

  • Commissioning:

    • L00 > 95%

    • SVXII > 90%

    • ISL> 80%

      • Completing cooling work

June shutdown

ISL almost fixed

% of silicon ladders powered and read-out

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

F. Bedeschi, INFN-Pisa


Detector performance2

Detector Performance

  • Silicon detectors:

    • Typical S/N ~12

    • Alignment in R-f good

      • First reliable R-z iteration in production soon

F. Bedeschi, INFN-Pisa


Detector performance3

Detector Performance

  • TOF resolution within 10 –20% of design value

    • Improving calibrations and corrections

S/N = 1942/4517

TOF

S/N = 2354/93113

F. Bedeschi, INFN-Pisa


Detector performance4

Detector Performance

  • XFT: L1 trigger on tracks

    • full design resolution

      • DpT/p2T = 1.8% (GeV-1)

      • Df = 8 mrad

Efficiency curve:

XFT cut at

PT = 1.5 GeV/c

Offline

track

XFT

track

F. Bedeschi, INFN-Pisa


Detector performance5

s=48 mm

Detector Performance

Online

track

impact

param.

  • Secondary VerTex L2 trigger

    • Online fit of primary Vtx

    • Beam tilt aligned

    • D resolution as planned

      • 48 mm (33 mm beam spot transverse size)

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

      • NOT available in analyses that follow

F. Bedeschi, INFN-Pisa


Physics with cdf ii

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 plots

    • Quality of standard signatures

    • Rates of basic physics signals

    • Surprisingly some results are already of relevance in spite of the limited statistics

      • Several CDF presentations made in the parallel sessions

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

F. Bedeschi, INFN-Pisa


Data sample

Data Sample

  • Stable physics trigger table established since February ’02

  • Summary 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.

F. Bedeschi, INFN-Pisa


Em calorimeter scale

EM Calorimeter scale

NZ = 247

Central-central

  • 638 Z  e+e- in 10 pb-1

    • s(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% simulation

      • Resolution: +4% simulation

Central-West plug

Central-East plug

NZ (W+E) = 391

F. Bedeschi, INFN-Pisa


Measurements with high et e

Measurements with high Et e±

  • Uncorrected Z e+e- angular distributions and asymmetries

Measurements compared with Pythia/CTEQ5L prediction

Back

Back to index

F. Bedeschi, INFN-Pisa


Measurements with high et e1

Measurements with high Et e±

  • Clear evidence for W en signal

    • Isolated central electron

    • Et > 25 GeV, Et >25 GeV

F. Bedeschi, INFN-Pisa


Measurements with high et e2

Measurements with high Et e±

  • Good modeling of observed W en distributions

F. Bedeschi, INFN-Pisa


Met resolution

MET resolution

  • Minimum bias events

    • Run 1: 0.53/S Et with forward cal. Use |h|<4.2

    • Run II: 0.60/S Et with plug only |h|<3.6

      • With miniplug |h|<5.5

F. Bedeschi, INFN-Pisa


Measurements with high et e3

Measurements with high Et e±

0.10 soon!

0.16 now!

  • W cross section:

    • sW*BR(Wen) (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tn: 95 ± 6 ± 1

F. Bedeschi, INFN-Pisa


Measurements with high et m

Measurements with high Et m±

  • Clear evidence of Z m+m-

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

m1

m2

  • 57 candidate events in 66<Minv<116 range

  • NZ = 53.2±7.5 ±2.7

F. Bedeschi, INFN-Pisa


Measurements with high et m1

Measurements with high Et m±

  • Good modeling of observed Wmn distributions

  • Measure s(Wmn) and R=s(Wmn)/s(Zmm)

Longitudinal

beam profile

MET

F. Bedeschi, INFN-Pisa


Measurements with high et m2

Measurements with high Et m±

  • W cross section:

    • sW*BR(Wmn) (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 mm: 247 ± 13

- Wtn: 145 ± 10

MT

  • R=s(Wmn)/s(Zmm)= 13.66±1.94stat±1.12syst

    • Consistent with Run 1 results

F. Bedeschi, INFN-Pisa


W t n

W  t n

  • Evidence for typical t decay multiplicity in W t n selections

Back to index

F. Bedeschi, INFN-Pisa


Measurements with low et m

Measurements with low Et m±

13 pb-1

  • y trigger improved

    • pTm > 2.0 1.5GeV

    • Df > 5° 2.5°

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

No

Silicon

100k y

Centralmuons only

15 MeV with Silicon

s = 21.6 MeV

F. Bedeschi, INFN-Pisa


Measurements with low et m1

Measurements with low Et m±

  • Inclusive B lifetime with y’s

    • Fit pseudo-ct = Lxyy*FMC*My/pTydistribution

      • Output: b lifetime, fraction of y from B

        • ct=458±10 stat. ±11 syst. mm

          (PDG: 469±4 mm)

        • y from B = 17% (pTy > 4 GeV)

  • Resolution function from large prompt component

    • R = narrow + wide Gaussian (19%) + exponential tails (1.2%)

    • Scale factor on error returned from vertex fit 1.069

~ 46%

Resolution

function

F. Bedeschi, INFN-Pisa


Measurements with low et m2

Add B scale correction

Tune missing material ~20%

Correct for material in GEANT

Raw tracks

Measurements with low Et m±

D0

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

  • Check with other known signals

U

1S

2S

3S

F. Bedeschi, INFN-Pisa


Measurements with low et m3

Measurements with low Et m±

semi-leptonic B

y(2S)

  • B masses:

    • y(2S)J/y p+p- (control)

    • Bu J/y K+

    • Bd J/y K0*(K0*K+p-)

    • Bs J/y f (fK+K-)

lifetime

More mass plots

s(CDF)

s( PDG)

CDF 2002DPDG/s

y(2S)3686.43±0.54 0.866.00

Bu5280.60±1.70±1.1 0.774.05

Bd5279.80±1.90±1.4 0.174.72

Bs5360.30±3.80± -1.811.90

Bu

2.10

2.90

F. Bedeschi, INFN-Pisa


Measurements with low et m4

Measurements with low Et m±

BdyK*0

  • More mass plots:

    • Bd, Bs

Bsyf

Back

Back to index

F. Bedeschi, INFN-Pisa


Measurements with low et m5

Measurements with low Et m±

# B+ ~ 154

  • B+ lifetime:

    • B+ J/y K+

    • Fit results:

      • ct=446±43±13 mm

        (D PDG/s = 1.2)

      • Res. scale factor 1.16

      • Conservative systematic error

Back

Back to index

F. Bedeschi, INFN-Pisa


Measurements with inclusive leptons

Measurements with inclusive leptons

Back

Back to index

  • Find large samples of semileptonic B decays

F. Bedeschi, INFN-Pisa


Measurements with jets

Measurements with jets

  • Raw Et only:

    • Jet 1: ET = 403 GeV

    • Jet 2: ET = 322 GeV

F. Bedeschi, INFN-Pisa


Measurements with jets1

Measurements with jets

  • Expectations:

    • Increase max. energy reach

    • Study both central and forward

      • New physics is mostly central

      • Pdf’s affect both regions

  • Current work:

    • Accumulate large samples

    • Understand energy corrections

      • E-scale, jet shapes, MC tuning

Central jets

Run 1

Run 2a

Run 2b

Forward jets

F. Bedeschi, INFN-Pisa


Measurements with jets2

Measurements with jets

  • Jet distr. from data

    • Raw ET

    • Each trigger

      rescaled for

      pre-scale factor

Fixed cone algorithm: R = 0.7

F. Bedeschi, INFN-Pisa


Hadronic energy scale

central

calor.

Plug region

Plug region

Hadronic Energy Scale

  • Use J/y muons to measure MIP in hadron calorimeters

    • (Run II)/(Run 1) = 0.96±0.005

q

g

g

q

  • Gamma-jet balancing to study jet response

    • fb = (pTjet – pTg)/pTg

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

      • Run II (central):fb= -0.2379 ± 0.0028

    • Plug region corrections in progress

D fb = (4.0 ±0.4)%

F. Bedeschi, INFN-Pisa


Measurements with jets3

Measurements with jets

  • Jet shapes:

    • Narrower at higher ET

    • Calorimeter and tracking consistent

    • Herwig modeling OK

16 pb-1 used for this study

F. Bedeschi, INFN-Pisa


Measurements with hadronic b triggers

Measurements with hadronic b triggers

D0 K p

ND=56320

10 pb-1

  • L2 trigger on 2 tracks:

    • pt > 2 GeV

      • |D| > 100 mm (2 body)

      • |D| > 120 mm (multibody)

  • Swamped by D mesons!

    • But see B’s as well….

CDF Run 2 preliminary

  • Ds± - D± mass difference

    • Both D  fp (fKK)

    • Dm=99.28±0.43±0.27 MeV

      • PDG: 99.2±0.5 MeV

    • Systematics dominated by background modeling

Ds+

D+

2360

1350

F. Bedeschi, INFN-Pisa


Measurements with hadronic b triggers important italian contribution

Measurements with hadronic b triggers(important Italian contribution)

  • Measure ratios of CKM suppressed decays

    • G(DKK)/G(DKp) = (11.17±0.48±0.98)% (PDG: 10.84±0.45)

      • Main systematics (8%): background modeling

    • G(Dpp)/G(DKp) = (3.37±0.20±0.16)% (PDG: 3.76±0.20)

      • Main systematics (4%): relative acceptance

CDF Run 2 preliminary

CDF Run 2 preliminary

L = 10 pb-1

Signal: 5670

Signal: 2020

F. Bedeschi, INFN-Pisa


Measurements with hadronic b triggers1

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%

Range of fract. from B using two extreme resolutions functions:

-single gaussian

- parametrization from K0S sample

K0S

Gaussian

F. Bedeschi, INFN-Pisa


Measurements with hadronic b triggers important italian contribution1

Measurements with hadronic b triggers(important Italian contribution)

#B+ = 56±12

  • 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 = 33±9

B  h+ h-

B+ D0p+

F. Bedeschi, INFN-Pisa


Conclusions on tevatron and detector status

Conclusions on Tevatron and detector status

  • Tevatron is slowly improving

  • The CDF detector is fully functional and accumulating proton anti-proton data

  • Understanding of detector is advanced

  • Many early physics results

    • sometimes competitive in spite of limited statistics

  • Ready to exploit full Tevatron potential as luminosity increases

F. Bedeschi, INFN-Pisa


Run 2b upgrades

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 italiani

    • Nuovo tracker a microstrip (Padova, Bologna, Roma1)

    • Nuovo preradiator (Pisa [Siena], Roma1, Pavia)

    • Aggiunta di timing sui calorimetri elettromagnetici (LNF)

F. Bedeschi, INFN-Pisa


Svx iib

SVX IIB

  • Overall design complete

  • Basic element (stave) is near being built and tested

F. Bedeschi, INFN-Pisa


Svx iib the stave

SVX IIB – The Stave

Mini PC

  • 2 sensors/hybrid = 1 module

  • 3 modules/side

  • 1 MPC/stave

  • 1 readout unit/stave

  • Stave is 66 cm long

Cooling tubes

Mounts

Chips

Wing Cable

Hybrid

Pitch Adapter

Sensors

Mounting holes

F. Bedeschi, INFN-Pisa


Svx iib1

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

sensors

Hybrid

F. Bedeschi, INFN-Pisa


Preshower

Preshower

F. Bedeschi, INFN-Pisa


Preshower1

Preshower

  • Basic design understood

    • Important Italian group contributions to R&D

      • Optimization of tile performance

      • Simplification of tile construction

  • Current construction model:

    • Italian groups build basic tile for both preshower and crack chamber

  • R&D in progress to establish some design choices:

    • Best scintillator (Dubna/Bicron)

    • Best fibers (Kurarai/PoliHiTech)

    • Coupling of WS fibers

F. Bedeschi, INFN-Pisa


Preshower2

Preshower

Dubna scint.

PoliHiTech fiber

  • Testing of tiles in progress in Pisa

~11 p.e./MIP

Test tile

F. Bedeschi, INFN-Pisa


Em timing

EM Timing

  • Progress on inductive signal splitters

    • Tested during June shutdown operating CEM calibration LED flashers

      • Confirmed that introducing the splitters only delays the PMT signal by 800 psec

F. Bedeschi, INFN-Pisa


Em timing1

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 TDC

    • Transition board design complete

    • Iterating with FNAL on ASD modifications required

F. Bedeschi, INFN-Pisa


Run 2b upgrades1

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

F. Bedeschi, INFN-Pisa


Run iib upgrades

Run IIB Upgrades

  • Quadro finanziario del run 2B

  • Il totale M&S+ R&D e’ aumentato solo per la definizione degli impegni di Bologna (+38 k€) rispetto a Maggio 2002

F. Bedeschi, INFN-Pisa


Mof 2003

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

  • F. Bedeschi, INFN-Pisa


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