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Using the SUSY PAT in the Jet+MET+Tau Final State (Progress, Status, and Plans for using SUSY PAT)

Using the SUSY PAT in the Jet+MET+Tau Final State (Progress, Status, and Plans for using SUSY PAT). Jonathan Asaadi , Teruki Kamon, David Toback SUSY PAT Meeting Texas A&M University 7/16/08. Goals: Searching for SUSY at High Tan b  Taus in the Final State. 2 Tau. 2 Jet. MET.

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Using the SUSY PAT in the Jet+MET+Tau Final State (Progress, Status, and Plans for using SUSY PAT)

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  1. Using the SUSY PAT in the Jet+MET+Tau Final State(Progress, Status, and Plans for using SUSY PAT) Jonathan Asaadi, Teruki Kamon, David Toback SUSY PAT Meeting Texas A&M University 7/16/08 Jonathan Asaadi Texas A&M

  2. Goals: Searching for SUSY at High Tan b  Taus in the Final State 2 Tau 2 Jet MET Assuming Squark/Gluino Pair Production, we want to use the SUSY Physics Analysis Tool (PAT) to: 1) Select SUSY Events in the 2t+2Jet+MET final state 2) Utilize the SUSY PAT to study event kinematics and topology, such as Di-tau invariant mass…etc…

  3. Using the SUSY PAT First steps towards our goals: 1) Using the SUSY PAT to reproduce results from a Jet+MET analysis done by Seema Sharma (Tata Institute) with private analysis tools and locally produced samples 2) In parallel we want to start adding the tau information needed to the SUSY PAT to select 2t+Jet+MET events and have tau kinematic information available as Layer 2 objects -> Useful, for example, in constructing the Ditau Invariant Mass a) We want to make sure taus are included the same way electrons and muons are -> e.g. using info from PAT

  4. Outline • Outline of the way SUSY PAT works now… • What needs to be done to implement tau information into the PAT and SUSY PAT… • Progress and Status of Tau code in SUSY PAT • Progress made with the SUSY PAT, as is, for a SUSY Low Mass test point (LM2) sample • m0 = 185 GeV, m½ = 350 GeV, tan b = 35, sgn(m) = +, A0 = 0 • Conclusions and Next Steps… Jonathan Asaadi Texas A&M

  5. Outline of how the SUSY PAT Works Advantages 1. Final Ntuple is small and easy to manage 2. Can quickly go from data to histograms such as MET and HT 3. Certain event selection criteria (min MET, min JET ET, …etc) are easily configured and changed by the end user Input file: (e.g.LM2 Sample) Run the Standard PAT: (PAT Layer0 & PAT Layer1) PAT information is not written to file and is simply passed to the SUSY PAT Disadvantages 1. No access to PAT Layer 1 info (This means no access to jet, MET, or tau information) This may not be the best way to go since we are still developing the analysis tools! 2. Black box approach to using the PAT on your data sample Run SUSY PAT: (e.g. SUSY All Hadronic Analyzer) PAT information is dropped here… Produces Flat Ntuple: (w/Variables as Trees)

  6. How we want the SUSY PAT with Tau Information Input file: (e.g.LM2 Sample) * Others in our group are working on the standard set of tools for Taus (Alfredo Gurrola, Alexei Safanov, …) * A lot of expertise for incorporating these tools into the SUSY PAT Run the Standard PAT: (PAT Layer0 & PAT Layer1) Need to include Tau information into the standard Layer 1 information ! Here variables such as Di-tau invariant mass will be calculated and plotted in histograms Run SUSY PAT: (e.g.Susy All Hadronic Analyzer) Have the option to retain all Level 1 information available here… Produces Ntuple with Layer 1 Information as well as w/Variables as Trees : Jonathan Asaadi Texas A&M

  7. Unfortunately this structure doesn’t exist yet…! Do two things in parallel • Make a list of items that need to be added to the PAT and SUSY PAT in order to use tau information • Start on a “kludge” (piecing many different tools together) in order to make progress while we get the standard tools up to speed… a) E.g. find some way to make the Di-tau invariant mass distribution in the set of events that pass the all hadronic default criteria Jonathan Asaadi Texas A&M

  8. Tasks towards adding taus to PAT and SUSY PAT • PAT • Add/Tweak Particle Flow Tau information into the PAT • Determine what are the correct default parameters for Layer 1 tau construction • Adding standard Level 1 ID selection criteria and bitmask (or whatever is used for electrons and muons to make selction of a good tau easy) • SUSY PAT • Add the ability to have Layer 1 information in ntuples after running the SUSY PAT • Too early in the tools development to have this information tossed aside • Add PAT Layer 2 tau objects to the SUSY PAT • Make the analysis run the same way on all objects • Add to the Flat Ntuple variables for taus • Di-tau Invariant Mass, etc… • Add event selection criteria for taus to the SUSY PAT • Number of taus, Minimum Pt, etc… Jonathan Asaadi Texas A&M

  9. Quickly Changing Gears… • To show how well we are doing with the SUSY PAT using the all hadronic selection criteria and that the tool is working… • Compare to Seema Sharma's (Tata Institute) search for SUSY in the LM2 dataset using Jets+Met Jonathan Asaadi Texas A&M

  10. Reproducing Jets + MET Results Default SUSY PAT Event Selection Criteria - Minimum Missing Et = 0 GeV - Number of Layer 1 Jets = 3 - Minimum Et for the three leading Layer 1 Jets = 30 GeV, 30 GeV, 30 GeV - Max Eta for the three leading Layer 1 Jets = 1.7, 3.0, 3.0 - Minimum EM Fraction from Layer 1 Jet = 0.1 - Max Eta for any Layer 1 Jet = 12 - Minimum Pt for any Layer 1 Jet = 10.0 GeV Produced directly from the default “all hadronic” SUSY PAT Jonathan Asaadi Texas A&M

  11. Reproducing Jets + MET Results Modified SUSY PAT Event Selection Criteria - Min Missing Et = 200 GeV - Number of Layer 1 Jets = 3 - Min Et for the three leading Layer 1 Jets = 100 GeV, 30 GeV, 30 GeV - Max Eta for the three leading Layer 1 Jets = 1.3, 12.0, 12.0 - Minimum EM Fraction from Layer 1 Jet = 0.1 - Max Eta for any Layer 1 Jet = 12 - Minimum Pt for any Layer 1 Jet = 10.0 GeV Default SUSY PAT Event Selection Criteria - Minimum Missing Et = 0 GeV - Number of Layer 1 Jets = 3 - Minimum Et for the three leading Layer 1 Jets = 30 GeV, 30 Gev, 30 GeV - Max Eta for the three leading Layer 1 Jets = 1.7, 3.0, 3.0 - Minimum EM Fraction from Layer 1 Jet = 0.1 - Max Eta for any Layer 1 Jet = 12 - Minimum Pt for any Layer 1 Jet = 10.0 GeV Modified to match Seema’s Analysis Jonathan Asaadi Texas A&M

  12. Seema’s Plot SUSY PAT Kinematic Cuts Entries: 12382 Mean 439.6 RMS 174.4 Comparing these two MET distributions Entries: 10547 Mean 436.9 RMS 175.2 SUSY PAT Plot “Ballpark” agreement between SUSY PAT results and previous analysis Still working to understand any of the differences in number of events Jonathan Asaadi Texas A&M

  13. Other Background Plots… • We are currently running jobs to reproduce many of the background distributions from this analysis • t-tbar + N Jets • W + N Jets • QCD Jobs submitted and running now to reproduce these distributions Jonathan Asaadi Texas A&M

  14. Conclusions and Next Steps • Working on reproducing Jet+MET analysis for LM2 • This analysis did not include taus originally • We want to get an understanding of the tools…then begin adding tau information • Adding Taus to the SUSY PAT • Lots of work still needing to be done here • We’ve started to identify what needs to be added to the PAT and the SUSY PAT in order to include taus • In the very beginnings of coding the tau information into the SUSY PAT Jonathan Asaadi Texas A&M

  15. Backup Slides Jonathan Asaadi Texas A&M

  16. SUSY in Jets+MET+tat LM2 Point • Seema Sharma (TATA Institute) has been working on an analysis using Jets+MET+t • She has produced many results using local data samples for her study Jonathan Asaadi Texas A&M We want to use the SUSY PAT to reproduce these results

  17. Sketch of Timeline June 1st Jonathan Asaadi comes to the LPC Preliminary Work: - Understanding CMSSW, PAT, and SUSY PAT - Learning basic tools and how to manipulate them June 16th Able to generate plots for Jet+MET and LM2 data sample Reproducing Jet+MET Analysis Using SUSY PAT: - Attempting to run SUSY PAT over data samples - Running and understanding Seema’s analysis - Parsing the differences between the tools GOAL: To be here by late July and have begun incorporating taus by August Mid July  Finish reproducing study and be able to generate own Jet+MET analysis for LM2 using SUSY PAT Begin Work on Incorporating Taus - Work with Alfredo Gurrola and others to understand tau algorithms - Begin understanding coding procedures to include taus into SUSY PAT Jonathan Asaadi Texas A&M

  18. Steps “kludge” SUSY PAT with Taus 1 2 Input file: (PatNtuple) Input file: (LM2 Sample) Run the Standard PAT: (PAT Layer0 & PAT Layer1) Run PFTau Modules: (Identify and Record Taus) Write this information out as a ntuple Ntuple with PAT Info and Tau Info (Pat_tau_ntuple.root) Ntuple with PAT Info (PatNtuple.root) Use this as input into PFtau modules Use as input into SUSY PAT 3 Run ‘modified’ SUSY PAT: (Susy All Hadronic Analyzer with DiTau Invariant Mass Variable) Input file: (Pat_Tau Ntuple) Produces Flat Ntuple: (Histograms w/Variables as Trees…including Taus!) Jonathan Asaadi Texas A&M

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