CDF Performance Rob Roser and YoungKee Kim

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CDF PerformanceRob Roser and Young-Kee Kim
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CDF Organization
October 2005 Spokespersons Young-Kee Kim Rob
Roser Detector Operations Willis Sakumoto
(co-head) Pat Lukens (co-head) Offline
Operations Ashutosh Kotwal (co-head) Pasha Murat
(co-head)
April 2005 Spokespersons Luciano
Ristori Young-Kee Kim Detector Operations Rob
Roser(head) Willis Sakumoto (deputy
head) Offline Operations Liz Sexton
(co-head) Ashutosh Kotwal (co-head)
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CDF Detectors

• Run IIb Upgrades Complete
• Central Preshower Detector
• Replacing with a finer segmentation system
• Electron tagger, ?/?? separation
• Installed fall 2004
• Electromagnetic Timing
• New system for rejecting beam-halo and cosmic ray
• Searches with ? (e.g. GMSB SUSY, long-lived
  particles)
• Installed fall 2004

Performing very well. Even Run IIb Detectors! -
Operational since early 2005
For the future, tracking systems are our main
concerns.
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Tracking Systems COT and Silicon

• COT Aging - Fully Recovered
• Aging due to hydrocarbons
• coating sense wires
• Fixed by adding Oxygen
• Fully recovered May 2004
• 99.7 working!
• Silicon detector lifetime is a complex issue
  involving
• Component failures
• 93 powered 84 working 4 recoverable in
  offline
• Secondary vertex trigger requires 4 layers 21
  out of 24 wedges
• Beam incidents
• lost 2 of chips conditions improved, but still
  concern
• Long-term radiation damage

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Silicon Detectors

• Radiation damage
• gt 90 of total radiation is due to collisions
  NIM A514, 188-193 (2003)
• Bias voltage scans as luminosity accumulates
• Study collected charge (hits on tracks) and mean
  noise
• Measurements agree with predictions up to 1 fb-1.
• Efforts to increase the Silicon lifetime
• Lowered Silicon operating temp. gradually from
  -6oC to -10oC.
• Thermally isolated SVX from COT inert regions
  such that the silicon can be kept cold during COT
  work.

Predicted Silicon Lifetime
8 fb-1
Lifetime 0 10 fb-1 20 fb-1
30 fb-1 40 fb-1
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Run IIb Trigger / DAQ Upgrades

• Instantaneous Luminosity 2 x 1032 cm-2s-1 (IIa)
  ? 3 x 1032 cm-2s-1 (IIb)
• Ave of interactions 10, more hits / event
• Level-1 Tracking Triggers
• low pT tracks hits from extra interactions
  ??mimic high pT tracks
• Lower purity ? higher Level-1 trigger rate
• Upgrade 2D to 3D tracking ? high purity and
  lower rate
• Level-2 Decision System and Secondary Vertex
  Trigger
• Upgrade Lower processing time ? higher
  bandwidth, more flexible
• DAQ, Level-3 computing, Data Logging
• Upgrade higher bandwidth event size increase

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DAQ / Trigger Specifications

• Run IIa Level-1 Accept not achieved due to
• higher than specified Silicon Readout and Level-2
  Trigger execution times.
• Assume 5 from readout and 5 from L2
  processing

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Run IIb Project Status

• Trigger and DAQ Upgrades
• Level-1 Track Trigger (XFT)
• Add z (stereo) info for 3D tracking - In
  production
• COT TDC modification to achieve L2 rate of 1000
  Hz (readout time)
• 12 out of 20 crates are operational.
• Level 2 decision system faster,flexible -
  operational since April 2005
• Level 2 Silicon Vertex Trigger (SVT)
• Faster - 3 step upgrade the first 2 steps are
  operational.
• Event Builder operational since August 2005
• Level-3 Computing Farm
• 1st procurement(64 PCs) in place-replace current
  system in Nov05
• 2nd procurement(64 PCs) - Jan.06
• Data Logging (20 MB/s ? 60 MB/s)
• 1st step operational (40MB/s), complete by early
  2006

Installation commissioning parasitically with
minimal impact on operations.
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Run IIb Upgrade Status

• Very successful so far
• 85 complete
• Will finish by early 2006
• Upgrade success due to
• Highly successful Run IIa detector/trigger design
  operation
• Carefully targeted to specific high luminosity
  needs
• This allowed for incremental and parasitic
  implementation and commissioning with minimal
  impact on operations.
• Some cases (e.g. COT TDC), instead of building
  new detectors, we gradually improved the systems.

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Data Taking Efficiencies
Initial Luminosity (1030 cm-2s-1) Data
Taking Efficiency()
Detector/trigger/DAQ downtime 5 Beam
Conditions, Start/end stores 5 Trigger deadtime
5 our choice
2002 2003 2004
2005
2002 2003 2004
2005
Record 1.5 x 1032
83.5
85 of Run IIb Upgrade Projects were
commissioned with beam during this period.
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Data for Physics
Data up to Aug. 2004 Recorded 530 pb-1
Physics 320 - 470 pb-1 Data up to now
Recorded 1,080 pb-1 Physics 700
960 pb-1
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Data Reconstruction

• Recently achieved 6 week turn-around time between
  data taking and availability of physics-quality
  data with final calibrations.
• This reduced resource needs (person and
  computing).
• Reconstruction algorithms are stable since
  January 2005.
• Incorporated Run II detector upgrades.
• CDF reconstructioin executable is fast
• Plan to process all the data until the end of Run
  II at Fermilab.

CDF Run2 Prelim. L790 pb-1
Ave. inv. mass at Z peak GeV
yellow band 0.5 E scale
Run Number (up to July 20, 2005)
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Monte Carlo Simulation and Production

• Detector simulation reaching maturity - matching
  data
• Incorporated detector configuration changes with
  time
• Incorporated multiple interactions for data
  instantaneous luminosity
• Increasing access to global computing resources
  (GRID philosophy) to match physics needs.
• Running on worldwide computing clusters - shared
  with LHC
• 100 of MC samples are generated outside of US.
• Planning data analysis centers at remote sites
• Physics analyses produced with remotely located
  datasets
• Italian inst.s, Karlsruhe J/? lifetime, B
  tagging, Single top
• Worldwide computing resources transparent to
  physicists.
• Aim to support more computing with fewer FTEs

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Momentum and Energy Scale Status

• Understand passive material well
• see E/p tail
• Momentum scale
• flat over a large pT range.
• MW uncertainty due to P, E scale
• Run II current (Run Ib)
• ? 30 (87) MeV, e 70 (80) MeV
• better than Run Ib

Data MC Simulation
E / p of W electrons
?p / p - 0.0013 0.0001
1 / pT??(GeV-1)
??- mass (GeV) near Upsilon
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Physics Highlights(since your last visit in
April 2005)
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Top Mass Measurements
dilepton new
MtopCDF 172.2 3.7 GeV (2 accuracy)
2 papers submitted, 3 papers in preparation
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Top Mass and Production Cross-section
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Bs Mixing Analysis Winter 2005
Bs ? Ds?, Dsl?? where Ds ? Ds KK-, ????????
With 355 pb-1 CDF 95CL Limit 7.9 ps-1 CDF
Sensitivity 8.4 ps-1
526 33 events
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Bs Mixing Analysis Fall 2005

• Added a new decay mode Bs ? Ds 3?, and new
  trigger path
• Improved vertex resolution (important for larger
  ?ms)
• Improved effective efficiency
• Understand better systematics

With 355 pb-1 CDF 95CL Limit 8.6 ps-1 CDF
Sensitivity 13.0 ps-1
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?b Lifetime
? 1.45 0.13 (stat.) 0.02 (syst.) ps Single
best measurement in a fully reconstructed decay
mode With the outstanding discrepancy between the
lifetime measured with partially reconstructed
decay modes and theory, the crucial next step is
to measure it with better precision in fully
reconstructed decays.
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New Phenomena Searches
Z in ee
Searches via rare decays Br(Bs ? ??) lt 2 x 10-7
CDF Run II Prelim. (448 pb-1)
Z paper in preparation
hep-ex/0508051
paper (accepted by PRL)
MSSM Higgs in ?s paper submitted
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Publications Top Physics

• Published / submitted
• Top mass in ljets (template)
• Top mass in ljets (temp ME)
• Top -gt H b
• tt-bar production in tau lepton
• tt-bar x-sec using kinematics
• Top branching ratio
• tt-bar x-sec using SLT b-tagging
• Kinematics in tt-bar in dilepton
• tt-bar x-sec using Kinematics and secondary
  vertex b-tagging
• Single top
• tt-bar x-sec in di-lepton

• Under collaborations review
• W helicity
• Top mass in ljets (ME)
• Anomaly in Wb-jets
• Top mass in ljets (multivariate)
• Top mass in dilepton (template)
• Top mass in dilepton (ME)
• tt-bar x-sec combined
• tt-bar mass
• tt-bar x-sec with secondary vertex and jet
  probability
• tt-bar/WW/Z-gttautau x-sec with dileptons
• tt-bar x-sec in missing Et jets
• tt-bar x-sec in all hadronic channel

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Publications Bottom Physics

• Published / submitted
• Lambda_b -gt Lambda_c pi
• Bs/B Branching fraction ratio
• B mass
• Bs -gt J/psi pi
• Bd, Bs --gt mu mu
• Lambda_b --gt Kp, ?p
• Semileptonic moment
• Bs lifetime difference
• Bs to ?? etc
• D0 relative Br and CP asymmetry
• J/psi and B x-sec
• Bs --gt mumu branching ratio
• X(3872) observation
• D0 to mumu branching ratio
• Charm x-sec
• Ds D mass difference

• Under collaborations review
• Cascade pentaquark
• D1 and D2
• B --gt hh and CP violation
• X(3872) di-photon mass
• Bs --gt ?(2s) ?
• Ratio of Lambda_b Brs
• Semileptonic B lifetime
• Bc lifetime in J/psi e

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Publications New Phenomena

• Published / Submitted
• Monopole searches
• Search for h/A/H --gt tautau
• High mass dilepton
• 1st generation lepto-quark
• High mass di-tau
• Lepto-quark in missing Et dijet
• Excited electron
• Diphoton missing Et
• H search

• Under collaborations review
• 2nd generation lepto-quark
• Gluino/Sbottom search
• WH --gt lnbb search
• Higgs to WW search
• W to enu search
• WH --gt WWW search
• Stop --gt charm LSP
• High mass di-photon
• LeptonphotonmissingEt
• Z using mass and angular distribution
• Sneutrino to e/muon
• Stop in RPV SUSY

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Publications Electroweak and QCD

• Published / submitted
• W and Z x-sec (PRD)
• ZZWZ x-sec
• W Charge asymmetry
• WW x-sec
• W and Z x-sec (PRL)
• Forward-backward asymmetry in dielectron
• W / Z photon x-sec
• Diphoton x-sec
• Jet shapes

• Under collaborations review
• W mass
• Z --gt tau(e) tau(h)
• Jet x-sec with cone algorithm
• Jet x-sec with Kt algorithm
• W/Z (2jets) photon
• B-jet x-sec
• Forward jet x-sec with Kt algorithm
• Z b-jet x-sec

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Run II Publication Status
http//www-cdf.fnal.gov/physics/pub_run2/

• 2005 Goal
• 40 papers submitted
• 2005 Status
• 26 papers - submitted (11 published, 3 accepted)
• 12 papers - drafts under collaborations review
• Results approved by CDF physics groups
• Drafts approved by internal reviewers
• Godparents committee assigned for each paper.
• 30 papers - under godparents committees review
• Results approved by CDF physics groups

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1 fb-1 Physics Challenge (Spring-Summer 06)
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Bc ??J?????(700 pb-1 data up to July 20, 2005)
Up to Aug 2004 Up to Mar 2005 Up to May
2005 Up to July 2005
This analysis Preblessed last week Plan to be
blessed next week Data taken July 05, physics
results Oct. 05) This demonstrates that we are
capable to get physics out by Summer 06 with
data take up to Feb. 05
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Physics Group Conveners
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Preparation for Future
Average Peak Luminosity Projections (design)
We are here.
Shutdown Rescheduled 14 weeks from Mar. 1,
2006 No shutdown until 2007
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Main Concerns

• Running at high luminosity
• Triggers for physics
• Resources
• Shortage of Physicists for detector operations
  and offline operations
• Robs talk
• Needs for computing resources
• Igors and Pashas talks

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High Lum. Impact on Reconstruction / Physics

• Understanding Tracking, B-tagging Performance at
  3 x 1032 cm-2s-1
• lt of interactions gt 10
• Data
• vs primary vertices
• vs bunch-by-bunch lum.
• MC multiple interactions
• Work in progress

• Developing Analysis Techniques
• W Mass

0.2 x 1032 cm-2s-1 1.0 x 1032 cm-2s-1 2.0 x 1032
cm-2s-1 3.0 x 1032 cm-2s-1
MTW
pTlepton
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Physics Triggers for 3 x 1032 cm-2s-1

• Trigger Table in current operations is good to
  1.5 x 1032 cm-2s-1
• Kept improving as luminosity increases.
  Significant efforts!
• Even with all triggers/DAQ upgrades, we can
• not maintain an all inclusive trigger table
• for L gt 1.52 x 1032 cm-2s-1
• We will be forced to sacrifice some fraction
• of our physics program at high luminosity
• Need to establish priorities based on physics
  goals
• Run IIb physics priorities and triggers committee
  formed about a year ago
• Initially chaired by Spokespersons
• Now by Luciano Ristori

L(1032)
Lpeak 3 x 1032 In 3.5 hours, L lt 1.5 x 1032
66
34
hours
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Extrapolation to 3 x 1032cm-1s-1

• Triggers are sensitive to multiple interactions.
• Measure cross section vs of primary
  interaction vertices.
• Calculate cross sec vs lum. using Poisson
  distribution of of primary vertices.
• Good agreement with bunch-by-bunch data.

Level-2 high pT electron Level-2
high pT muon
(0.6 lt ? lt 1.1)
a highly non-linear behavior
Stereo confirmation of tracking triggers
trigger rate cross section x L
at 3 x 1032 cm-2s-1 3 of Level-2
bandwidth
50 of Level-2 bandwidth. Reduce to 10 with
XFT upgrade
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Extrapolation to 3 x 1032cm-1s-1
Cross sections of high pT triggers (high pT
e,?,?,jet,ET) with Level-1 upgrade Covers W, Z,
Top, WH, ZH, H?WW, SUSY (partial), LED, Z
1/3 of Level-2 bandwidth at 3x1032 cm-2s-1
studying further improvements Studied triggers
for full high pT physics program 2/3 of
bandwidth. Aim for 50 of bandwidth
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Physics Triggers at 3 x 1032 cm-2 s-1

• Trigger Table for 3 x 1032 cm-2s-1
• high pT physics program - aim for 50
• The remaining bandwidth will be given to B
  physics
• Strategy Developed high purity triggers for high
  luminosity
• while keeping inclusive heavy flavor triggers at
  low luminosity.
• Level-1,2 upgrades improve purity, reduce
  processing time.
• Other tools being implemented
• vetoing high multiplicity events
• Final decision on the trigger composition
• based on physics priority and purity of triggers
• Straw Trigger Table ready by October 2005.

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Concluding Remarks CDF Strategies
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Concluding Remarks

• CDF experiment is operating well. Better than
  ever!
• Typical data taking efficiencies in the mid 80s
  with increasing inst. Luminosity and Run IIb
  commissioning
• All detectors are in excellent conditions
• Stable offline software
• Established fast calibrations, data processing
  scheme
• Good detector simulation
• MC production at remote sites
• Challenging ahead
• x2 higher instantaneous luminosity
• x8 higher integrated luminosity
• Resources going down
• CDF Strategies in preparation for the future
• Planning ahead we have been identifying those
  areas that need further development and are
  beginning to address them immediately. Goal is to
  complete the work by early 2006.

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Concluding Remarks (cont.)

• To be done by the end of 2005 or early 2006
• Complete Run IIb upgrades (85 currently
  operational)
• Expected to be done by the end of this year.
• Physics trigger table up to 3 x 1032 cm-2s-1
  being prepared.
• Straw Trigger Table by October 2005
• Tuning simulation
• Need one more iteration for analyses with L gt 1
  fb-1
• Calibrations and algorithms that require large
  resources
• Reducing Jet energy scale uncertainty
• Need one more iteration for analyses with L gt 1
  fb-1
• Implementing algorithms for better Jet energy
  resolution
• Improving forward tracking and B tagging
• Preparing reconstruction algorithms for high
  inst. Lum.
• Tracking
• B tagging

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Concluding Remarks (cont.)

• Looking forward to Summer 2006 conferences
• Results with x3 increase in statistics over
  Summer 2005
• Report on gt 10 x Run I Luminosity !!
• The upcoming years will be an exciting time with
  increasing statistics
• Discovery through searches
• Discovery through precision experiments
• CDF Experience
• With 4 pb-1, Top limits set
• With 20 pb-1, Evidence paper out!
• With 65 pb-1, Discovery paper out!
• Hoping for new discovery with 1 fb-1
• New physics could appear with every factor of
  34.
• CDF is committed to operating well and analyze
  the data through 2009.