CDF Analysis, Data Preservation, and Decommissioning Plan Jonathan Lewis Fermilab Annual Science and Technology Review September 5-7, 2012

Outline Operations  Silicon detector study Physics Results  Higgs  Precision electroweak  QCD, heavy flavor, etc. Data analysis plans  Key physics topics  Data preservation Decommissioning J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

33 The CDF Collaboration North America  30 institutions Europe  21 institutions Asia  8 institutions The CDF Collaboration  15 Countries  57 institutions  348 authors

The End of an Era: 30 September 2011 J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

End of Detector Operations CDF and Tevatron finished strong  94% of silicon detector operational  Nearly 100% of other systems  Operational efficiency ~85% up to the end Includes trigger/DAQ and outages Fermilab group leadership in many subsystems Silicon Detector Central Outer Tracker Data Acquisition/Trigger Process Systems Slow Controls Solenoid J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Life After Death: Silicon Annealing Study Defects caused by exposure to radiation increase dark current and depletion voltage Bench-top tests show that raising the temperature will allow defects to migrate out and partially restore detector performance  Part of operating plan for LHC experiments  Big differences between tests and real experiments 20°C vs. 60°C Can’t access with probe station CDF operating history provides database of current vs. depletion voltage J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

23-day warm up to 18°C  Daily measurement of I vs. V bias L00 consistent with Hamburg Model SVX appears to have annealed during Run II  Contributed to better than expected performance  Consistent with operational history NIM paper in preparation J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, Life After Death: Silicon Annealing Study PRELIMINARY CDF Preliminary Test beam

CDF is Finishing Strong Ph.D. Theses  553 total  6 in CY12  60 more expected Publications  609 papers Incl. 5 with D0  60 in CY11  35 submitted in CY12 so far  >30 new results for Summer Conferences J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► With the LHC discovery focus turns towards determining properties (Is this the SM Higgs?) ► Primary Tevatron contribution is measuring Higgs couplings to bottom quarks WH  lνbb

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► With the LHC discovery focus turns towards determining properties (Is this the SM Higgs?) ► Primary Tevatron contribution is measuring Higgs couplings to bottom quarks ZH  llbb

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► With the LHC discovery focus turns towards determining properties (Is this the SM Higgs?) ► Primary Tevatron contribution is measuring Higgs couplings to bottom quarks ZH  ννbb

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Challenge is separating small signal from the much larger background contributions ► Focus on optimizing dijet mass resolution and efficiency for tagging bottom quark jets

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Challenge is separating small signal from the much larger background contributions ► Focus on optimizing dijet mass resolution and efficiency for tagging bottom quark jets

Tevatron Higgs Searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Challenge is separating small signal from the much larger background contributions ► Focus on optimizing dijet mass resolution and efficiency for tagging bottom quark jets

Sensitivity improvements J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► The biggest sensitivity improvements in these searches over the past year is from incorporation of a new NN-based b-tagging algorithm (HOBIT) ► Improves individual channel sensitivities on order of 15-20%

Results J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Validate search techniques and background modeling by measuring SM Diboson VZ (Z  bb) production in the same search samples ► Higgs signal potentially observable in highest S/B bins of discriminant outputs

Results J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Data excess (above background prediction) in the mass region between 115 and 135 GeV with a global significance of 2.5σ ► Fitted VH production cross section times H  bb branching fraction is roughly 2x SM expectation for 125 GeV Higgs mass, but also consistent with SM at ~1.5σ

Including other search channels J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

W Mass J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► World’s highest precision W boson mass measurement, M W = ±19 MeV ► Based on only 20% of the full CDF data set (still room for improvement) ► New world average (including updated D0 result) ±15 MeV

Legacy Top Quark Measurements Finalizing flagship top measurements with full dataset and analysis technology These measurements will survive long into the LHC era Now with full dataset:  Mass (l+jets), Mass (MET+jets)  top-anti-top mass difference  Helicity Coming soon with full dataset  Inclusive cross section  Single-top s- and t-channels J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Precision EWK Fits J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, ► Updated fits based on updated Tevatron W boson and top quark mass measurements ► With observation of Higgs-like particle at ATLAS/CMS, fits now provide a consistency test of the standard model framework

Charge Asymmetry in Top Quark Decays Both l+jets and dilepton channels, both at CDF and D0 exhibit anomalously large charge asymmetries  Challenging to perform this analysis at LHC New:  Parton-level angular distributions with full dataset New Publication to be submitted Sept Input for theorists Coming Soon:  Forward-backward asymmetry in b-quarks J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

BSM Searches Still competitive Searches with delayed photons:  GMSB: Long-lived neutralino decays into photon+MET  CDF calorimeter time-of- flight system well suited to this search  Full dataset analysis and model constraints in progress J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, Improved

Testing QCD with Photons 24 Diphoton cross section measurements with the full data set compared with all state-of-the-art calculations: ME+PS, NLO, NNLO Valuable conclusions :  Importance of multiple soft gluon emission  Importance of hard brems (quark “fragmentation”) and NNLO  ME+PS Monte Carlo describes most kinematic regions relevant to Higgs and BSM searches J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, 2012

Photon and Heavy Flavor Cross Section J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, Full dataset Photon E T > 30 GeV First use of photon ID ANN b.g. subtraction with ANN Secondary vertex tag b.g. subtraction with secondary mass Compare to NLO (Owens) Pythia Sherpa (in progress) Best fit is Pythia with 2x the gluon splitting

Special Energy Scan Operated Tevatron at lower energy for soft QCD Studies  √s= 900, 85M events  √s= 300, 20M events Unique physics opportunities  Minimum bias and underlying event studies Important for tuning event generators for LHC  Exclusive production (double diffraction)  Energy dependence of charm production Expect ≥ 3 papers from 5 days of beam J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Exclusive Hadron Production J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, Collect events with no activity 1<|  |<6 Examine the exclusive 2 and 4 track mass spectrum Modeled as double pomeron exchange Search for  c0  (770) not allowed Comparison of two energies!

Charm CPV Asymmetry in D 0 →π + π - or K + K - Seen at both CDF and LHCb  Best individual asymmetries from CDF A CP (KK)= (-0.32 ± 0.21)% A CP (ππ)= (+0.31 ± 0.22)%, ΔA CP = (-0.62 ± 0.21 ± 0.10)% Prediction: New Physics Postdiction: Probably not N.P. D 0 mixing measurement in 10 fb -1 coming soon! J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

B c Lifetime in B c + →J/ψ π + First measurement in fully reconstructed channel Complementary and reduced systematic uncertainties compared to semileptonic decays τ = ( ± ± ) ps J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Probing Large Mass Scales with Rare B Decays b →sμ + μ - : Differential decay rates and angular distributions  World-leading measurements J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, B (s) →μ + μ - : Full dataset  Small excess persists, but not supported in new data  BR(B s → μ + μ - )<3.1 × 10 -8

CDF Ongoing Analysis Effort 31 Complete and publish current on-going physics analyses with the full data sample Emphasize physics measurements with “legacy” potential or unique to the Tevatron : QCD and EWK measurements with p-pbar at 2 TeV QCD analyses of the energy scan data taken the last two weeks of running s-channel Single Top production t-tbar and b-bbar production asymmetries W boson and top quark masses Exotic searches CPV asymmetries in heavy flavor Combine important results with D0 and publish Complete the searches program in cases where we are still competitive with LHC Opportunities for students/postdocs working on experiments with long time horizons to touch data now J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, 2012

CDF Analysis Plans 32 QCD “Hard” QCD : Photon + jets Photon + W/Z (−>2jets) W + heavy flavor “Soft” QCD : Diffractive and exclusive studies Double parton interactions Bose-Einstein correlations Resonances in min-bias data EWK M W with the full data set sin 2 θ W from dilepton measurements W/Z rare decays Top A FB & angular distributions (ll, lj, bb) Single top, s-channel, properties Tevatron combinations Flavor CPV in charm asymmetries, A SL χ b, χ c fractions Studies of quarkonia BSM Exotic Higgs SUSY (delayed photons, trileptons) Low mass resonances J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, 2012

Last data, and reprocessing, done for winter conferences!  15B events total in Run II All B physics ntuples reprocessed Generic B physics MC project still anticipated Developing legacy code releases Migration to T10K tapes will take 2y, now underway  Total dataset 9.5 PB incl. MC Computing Resources J. Lewis, Fermilab Annual S&T Review, Sept. 5-7, CAF usage 7/11 to 6/12 Computing resources are well matched to analysis effort

Data Preservation Goal is to maintain the ability do perform a complete CDF analysis into the distant future  Similar level of effort and quality of tools as now exist  Explore public access Simplified data structures, e.g. four-vectors Task force is working on the problem  Includes physics and computing experts  Working with CS, D0, DPHEP  Requirements defined  Looking for technical solutions Balance workload for collaboration, computer professionals, future analyzers Must be able to maintain systems without future heroics J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Data Preservation: Key Issues Data access  Key is meta data  Considering ways to use IF data handling tools Code  Can keep up with OS updates in near term  Will need to rely on virtualization in farther future Job submission  Investigating interface to IF system Documentation  CDF Internal notes to be transferred to Inspire HEP  Will maintain web servers indefinitely Includes presentation library Working on plan to archive off-site web servers  Physics groups charged with organizing online documentation to bootstrap future analyses J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Decommissioning and Beyond All hazards secured  HV, cryogens, flammable gas all gone by November Recovered equipment for other experiments  Electronics, computers, phototubes  Contributing to 15 different efforts First floor counting room clear Second floor counting room set up as display West high-bay clear and ready for IARC  Preliminary building integration work completed East high-bay cleaned up Decommissioning goals for FY12 complete  14k hours. 0 injuries. J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Decommissioning and Beyond: FY13 Build Nova near detector in east high-bay Prepare CDF for future high-intensity beam line  Potentially transport beam to B0 with extension of MR remnant  Strip down CDF to allow future solenoidal experiment Remove tracker Extract muon shielding from collision hall  Complete work early to avoid interference with IARC Pit available when GPP renovation of building is complete in late FY14 J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,

Conclusions CDF showed it is “finishing strong” with impressive physics  Two rounds of optimized Higgs combinations and full suite of final publications  W mass, top mass, CP violation, ~60 publications Computing resources are in good shape  Data Preservation planning is well along, implementation would benefit from additional effort Decommissioning is on track Our greatest challenge in completing the CDF legacy continues to be maintaining the level of analysis effort  Rich dataset with much that should still be done Use the momentum -- exploit opportunities now! J. Lewis, Fermilab Annual S&T Review, Sept. 5-7,