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CDF at IFAE (1 year later) Mario Martinez

CDF at IFAE (1 year later) Mario Martinez. IFAE Seminar, 23 rd September 2004. Chicago . Booster. CDF. DØ. Tevatron. p sou rce. Main Injector (new). Fermilab. Tevatron. proton-antiproton collisions Main injector (150 GeV proton storage ring)

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CDF at IFAE (1 year later) Mario Martinez

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  1. CDF at IFAE(1 year later)Mario Martinez IFAE Seminar, 23rd September 2004

  2. Chicago  Booster CDF DØ Tevatron p source Main Injector (new) Fermilab

  3. Tevatron • proton-antiproton collisions • Main injector • (150 GeV proton storage ring) • antiproton recycler (commissioning) • Electron cooling this year • Operational on June’05 • 40% increase in Luminosity • 36 bunches (396 ns crossing time) Long Term Luminosity Projection (by end FY2009) Base Goal -> 4.4 fb-1 Design -> 8.5 fb-1

  4. Tevatron Performance Tevatron has reached the projected Lumi  1.1 x 1032 !!

  5. CDF Detector • Upgraded Muon Detectors • New TOF Detector • New Plug Calorimeters • New Drift Chamber • New Silicon Tracking

  6. CDF Run II Data • CDF Efficiency > 80% • DAQ runs with 5% to 10% dead time • Rest coming from very careful operation • of detector’s HV due to machine losses • (…to preserve silicon & trackers…) CDF -> ~500 pb-1 on tape

  7. CDF @ IFAE • IFAE Goals at CDF • Thesis for students with physics data • Training on Hadron Collider Physics before the LHC • Maximize profit from CDF lessons/experience • Be prepared for the “unexpected”…

  8. IFAE-CDF Personnel

  9. IFAE-CDF Commitments

  10. IFAE-CDF Commitments • IFAE group is leading the data quality monitoring effort in CDF and acts as Data Quality Manager (DQM) • IFAE defines global DQM Automated Systems to characterize the quality of the data with emphasis on the quantities relevant for physics analyses • Online & Offline DQM Automated Expert Systems • Maintenance of Good Run Lists (DQM Online+Offline diagnosis) • WWW documentation & Statistics • IFAE is responsible of DQM Operation • Regular Reports to CDF • Online Support to Shift Crew operations (DQM Pager) • IFAE charges & responsibilities are formally established in a MoU signed together with CDF and FNAL Directorate

  11. DQM Online Project for CDF Online Monitors (C++ based) produce online histograms to monitor the basic performance of the different sub-systems (occupancy levels, HVs) dead channel Expert System runs @ CDF control room Monitors online histograms & status of Consumers, HVs and Tevatron Beams Alerts shift-crew in case of problems -> Determines Online Good Run Status

  12. DQM Offline Project for CDF Latest calibrations and alignments are used to reconstruct high-level objects (electrons,. photons, jets, J/Y...) as they are employed in final physics analyses A number of critical quantities are selected, enough for DQM diagnosis (DQM workshop on Nov’03 decided list) The DQM expert system implements the logic to automatically analyze the critical histograms and evaluate their quality position & width signal vs background The errors detected (either due to raw detector quantities or caused by offline reconstruction codes) are promptly reported to detector experts

  13. DQM Offline jets MB high pt m g low pt ele express low pt m J/Y Fully automatic generation of histograms and diagnosis….

  14. Validation & Good Run Lists for CDF DQM Offline system also participates in intensive Offline Validation Efforts carried out each time a new version of official analysis code is compiled DQM is part of “check-list” for the CDF offline shifter (who monitors the data flow during farm data processing) DQM decisions (Online + Offline) are combined to produce the CDF official lists of “good runs” for physics IFAE has the responsibility to centralize & update data quality decisions and produce “good run” lists for the whole CDF Collaboration

  15. Status of DQM Project (~4 FTE’s @ FNAL, May 2003 – August 2004) • DQM Online • First version operational @ 80% • Commissioning & cohabitation phase with CDF shift-crew ongoing • Aims to replace 24hr shift- • operator in the future • DQM Offline • Expert System @ 80% • System now fully automatic and • already used to validate • offline reconstruction software • New versions of “good run” lists • regularly delivered to CDF

  16. CDF Operations Organization Chat Detector and Computing Operations Head Rob Roser Deputy Head Carl Bromberg Deputy Head Rick Snider Trigger Dataset Working Group Kirsten Tollefson Kevin Pitts Admin. Support Nancy Michael Safety Coordinator Dee Hahn Associate Head, Computer Infrastructure Frank Wuerthwein Associate Head, Detector Operations Masa Tanaka Associate Head, Detector Subsystems Camille Ginsburg Associate Head, Detector Infrastructure Stefano Moccia - Steve Hahn Data Handling Rob Kennedy Rick St. Denis Operations Manager J.J. Schmidt Mary Convery Rob Harr Trigger L1/L2 Cheng Ju Lin Roberto Carosi Process Systems Bill Noe(Leader) Dean Becker Warren Bowman Cutchlow Cahill Steve Gordon Jim Humbert Jim Loskot Bruce Vollmer Silicon Will. Trischuk Rainer Wallny Farms Steve Wolbers Online Database William Badgett COT David Ambrose Morris Binkley Aseet Muhkerjee Daily/Weekly Ops Shift Crews Sci-Co Aces(2) Co TOF Gerry Bauer Mathew Jones CAF Mark Neubauer Muons Guram Chlachidze Phil Schlabach Electrical and Mechanical Dervin Allen(Leader) Roberto Davila Lew Morris Wayne Walden George Wyatt DAQ Frank Chlebana William Badgett Data Bases Dmitry Litvintsev Petar Maximovic Calibrations CLC Jaco Konigsberg Sasha Suhkanov Level 3 Gilles Lentdecker G. Gomez-Ceballos Interactive Computing Robert Harris Monitoring/Valid Kaori Maeshima Slow Controls Steve Hahn(Leader) JJ Schmidt JC Yun Radiation Monitoring Rick Tesarek CSL T. Vaiciulis DQM Mario Martinez-Perez Calorimeter Larry Nodulman Willis Sakumoto Forward Koji Terashi Building Manager Craig Olson SPL Box defined for DQM

  17. Spokespeople Luciano Ristori Young-Kee Kim Executive Board Trigger DataSet Working Group Chair: K Tollefson, K.Pitts CDF Organization Chat Detector and Computing operations Head: R Roser Dep. Head: C Bromberg Dep. Head: R. Snider Offline Analysis Head 1: L.Sexton Head 2: F.Wuerthwein Physics Coordinator T. Liss Run 2B Project (P. Lukens, Proj. Mgr.) D. Benjamin (Deputy) Project Office D. Knapp, T.J. Sarlina Muons V. Martin L. Cerrito B/C Physics M. Shapiro C. Paus Detector Subsystems Assoc. Head: C. Ginburg Computing Infrastructure Assoc. Head: F. Wuerthwein Silicon N. Bacchetta B. Flaugher Tracking M. Herndon C. Hays Electroweak A. Kotwal P. Murat Calorimetry S. Kuhlmann Silicon Interactive Comp. R.Harris Electrons, jets, calor B. Heinneman B. Wagner COT Exotics S. Lammel S. Worm Data Handling R.Kennedy, R.StDenis DAQ/Bandwidth TOF Calorimeter CAF M.Neubauer QCD R. Field M. Martinez TOF R. Snider Muon Data Base D.Litvintsev, P.Maximovic DAQ Simulation A. Kotwal M. Paulini A.Warburton Farms S.Wolbers Top P. Azzi J. Konigsberg Trigger CLC Detector Operations Assoc. Head: K. Maeshima Offline Operations Assoc. Head: P. Murat DataBase Speakers Committee Chair: F. Bedeschi Validation data: R. Snihur M. Martinez Monitors Prod. Coord. Ops Managers Forward Offline Shifters DQM Daily/Weekly ops Shift Crews- SciCo, CO, Aces(2) Statistics Committee Chair: L. Lyons Code management Releases A. Kreymer Detector Infrastructure Assoc. Head: S. Moccia Calibrations Web Development NA Infrastructure: L. Sexton-Kennedy Process Systems Electrical & Mechanical Godparents Slow controls Online, Offline & Physics Coord. responsibilities… Building Manager

  18. IFAE-CDF Physics Program

  19. IFAE-CDF Physics Program • The IFAE Group has defined a research program initially based on the study of events with jets in the final state and multi-jet events with large missing transverse energy • Inclusive Jet Production and Quark Compositeness • Search for Gluinos and Squarks • Extra Dimensions & KK resonance states  some of the first analyses that will be done at the LHC • IFAE already deeply involved in CDF physics analyses: • 1 Poster for DOE Annual Review (FNAL, March) • 3 Talks at CDF Collaboration Meeting (FNAL, April/August) • 2 Talks at APS Conference (Denver, May) • 1 Talk at Hadron Collider Physics 2004 (Madison, June ) • 1 Plenary Talk at Physics in Collision 2004 (Boston, June) • 1 PRD paper about to be submitted

  20. Structure of Matter & Jets The Tevatron Collider at Fermilab explores very small distances ……. using jets

  21. Jets @ Tevatron Dijet Mass = 1364 GeV (probing distance ~10-19 m) ET = 666 GeV h= 0.43 f h ET = 633 GeV h = -0.19

  22. Jet algorithms & physics • Final state partons are revealed through collimated flows of hadrons called jets • Measurements are performed at hadron level & theory is parton level (hadron  parton transition will depend on model for gluon shower and fragmentation) • Precise jet search algorithms necessary to compare with theory and to define hard physics (cone in h – f space ?) f h

  23. Run I Results Observed deviation in tail …….. was this a sign of new physics ? Run I data compared to pQCD NLO

  24. gluon density at high-x Important gluon-gluon and gluon-quark contributions at high- Gluon pdf at high-x not well known …room for SM explanation….

  25. Run I Jet Cross Section vs h NLO QCD (JETRAD, CTEQ4M) CTEQ5/CTEQ6 Measurements in the forward region allow to constrain the gluon distribution Big uncertainty still remains for high-x gluons

  26. above threshold (1 jet) below threshold (no jets) Notes on Run I Jet algorithm Cone algorithm not infrared safe: The jet multiplicity changed after emission of a soft parton Cone algorithm not collinear safe: Replacing a massless parton by the sum of two collinear particles the jet multiplicity changes Fixed-order pQCD calculations will contain not fully cancelled infrared divergences: -> Inclusive jet cross section at NNLO ->Three jet production at NLO -> Jet Shapes at NLO three partons inside a cone

  27. Cone-based algorithm Issues • Cone-based algorithms can be modified to be infrared/collinear safe  MidPoint • Cone-based jet algorithms include an “experimental” prescription to resolve situations with overlapping cones • This is emulated in pQCD theoretical calculations by an arbitrary increase of the cone size : R  R’ = R * 1.3 Physically is much more natural to separate jets according to their relative transverse momentum Kt algorithm preferred by theory

  28. Jet Production with KT • Inclusive KT algorithm • Infrared/collinear safe • No merging / splitting • Th. errors dominated by gluon PDF • Data errors dominated by E-scale • High-Pt tail to be watched closely…. • (if persists could indicate quark compositeness)

  29. KTjets vs D D=0.5 D=0.7 D=1.0 As D increases data departs from pQCD NLO  more soft contributions

  30. Underlying Event & Jet Physics A typical Tevatron dijet event consists of : • hard interaction + gluon shower • initial soft gluon radiation • interaction between remnants cone Underlying Event contribution must be removed from the jets before comparing to NLO QCD predictions Precise jet measurements require good modeling of the underlying event Precise measurements on jet internal structure will help…. Between pQCD and non-pQCD physics……

  31. Studies on Jet Fragmentation • Jet shape dictated by multi-gluon emission form primary parton • Test of parton shower models and their implementations • Sensitive to quark/gluon final state mixture and run of strong coupling • Sensitive to underlying event structure in the final state

  32. Jet shapes Jet shapes sensitive to the relative amount of quark- and gluon-jets in the final state and the running of strong coupling

  33. Jet shapes • PYTHIA Tune A  describes data • (enhanced ISR + MI tuning) • PYTHIA default too narrow • PYTHIA default (w/wo MI) similar • HERWIG too narrow at low Pt

  34. IFAE @ FNAL TODAYhttp://www.fnal.gov/pub/today/archive_2004/today04-07-01.html

  35. Plans & Publications • Jet Shape measurements constitute a PRD now in the latest state of review …and about to be submitted for publication • We plan to publish a PRL with the inclusive jet cross section by winter/spring ’05 • Use all 2002 – 2004 statistics • Understand Parton  Hadron corrections • Reduce systematic errors (jet e-scale + ….) • Study quark compositeness • Olga’s Thesis by the end of 2005 (will include also measurements at large rapidities  to constrain the gluon distribution at high-x)

  36. IFAE-CDF Exotic Program

  37. Search for Squarks & Gluinos X. Portell’s Thesis MSSM Spectrum Multi-jets + Large Missing Et signal (R-parity conserved  Neutralino is LSP) • SM Backgrounds: • QCD • Z nn + 3 jets • W e n + 2/3 jets • W t n + 2 jets • Top Big ss

  38. Run I Results Best limits on squark/gluino masses came from this channel….

  39. Notes on Run I Analysis MET distribution shows beam-related backgrounds that must be removed first… (huge reduction factor involved) Run 1 Boson+n jets Only LO predictions for Z/W + jet(s) SM processes  huge scale dependence… ..ALPGEN,COMPHEP,GR@PPA,MADGRAPH,MCFM… Run 1 Precise measurement of Z ee +jet(s) is mandatory to normalize backgrounds and validate MC event topologies…

  40. First Steps…in Run II • MET f distribution dominated by beam-related backgrounds and defects in the CAL calibrations • Now we understand the features and after some minimum cuts things look better (but not perfect) • Vertex • At least two jets • MET > 45 GeV • additional cuts under study CDF …almost there…..

  41. 400 600 800 1000 O. Salto’s Thesis Extra Dimensions d/dM (pb/GeV) Randall-Sundrum ED Model K/MPl 1 0.7 0.5 0.3 0.2 0.1 Tevatron 700 GeV KK graviton Excited graviton (spin-2 KK resonance) M (GeV) Mono-jet + MET Signal G Z ee jet Z nn + jet irreducible background

  42. IFAE-CDF Computing

  43. IFAE-CDF Computing • IFAE already well involved on Physics • Keeping leadership requires adequate CPU capabilities (huge MC & data samples, NLO programs…etc) • Needed to open new lines of physics research • We need to have CDF @ HOME during CDF ATLAS transition • Following example from other CDF institutions, we started building a DCAF (Decentralized CDF Analysis Farm) for IFAE using the infrastructure available at PIC (Spanish GRID Tier1) • A. Pacheco spent last summer at FNAL and BCN DCAF is already working (IFAE personnel at BCN use it now) • We are in the process of hiring a Techn. in Informatics • BCN DCAF is growing (we bought more disks and CPUs) • We copy the relevant DATA and MC datasets to BCN

  44. BCN DCAF It works ! (open to other CDF users)

  45. …and when we thought we were too busy… IFAE-CDF

  46. May 30th- June 3rd 2005CDF Collab. Meeting in BCN First time CDF will meet outside USA..

  47. Conclusions Well …I guess now we are really busy… … but we are doing well…. so….come to Chicago and work with us…..!! [paid advertisement] Chicago’s Lakefront

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