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Optimization of L2 Code for Tau Trigger Performance Study

This project aims to optimize the L2 code for the tau trigger performance study, including modifications to the trigger algorithms and cuts. The study will focus on Z -> tau tau decays and include physics description, CMS detector description, generator studies, trigger performance, and reconstruction analysis.

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Optimization of L2 Code for Tau Trigger Performance Study

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  1. Mike B Jan 30th , 08 Z to ττ

  2. L2 Code Changes • In the original development • The triggers were running in series and if a cut fails the next steps are not run. • With other words a speed-optimized implementation • I was asked to modify it as: • We run all the algorithms and create the cuts in a TriggerInfo structure (L2TauIsolationProducer)‏ • Then another algorithm reads the Info struct and applies the cuts(L2TauIsolationSelector)‏ • Changes Made. Code uploaded to CVS • I wait for the new Relval sample in 1_8_X

  3. Tau L2Trigger Structure • Code exists at • RecoTauTag/HLTProducers • DataFormats/RecoTau/ • HLTriggerOffline/Tau L2TauIsolationProducer Applies Trigger Algorithms and Creates Cuts L2TauJetsProvider Provides Jet Objects around L1 Tau objects L2TauInfoAssociation L2Jets L2TauIsolationSelector Reads Info Structure and Creates Isolated Jet Collection L2TauIsolatedJets

  4. Run on the 1_6_X sample

  5. Run on the 1_6_X sample

  6. What is left at L2 • Finish running QCD on 1_6_X – decide cuts • Validate cuts with RelVal samples and test code in each version towards integration to the HLT Table. • Measure time performance

  7. Prelim Plan • Since we deal with Taus for 6 mnths now it is a good idea to study Z->tau tau decays for the prelim. • Tau jet + leptonic tau • Lepton tau + Lepton Tau • Tau jet + Tau Jet (Hard and challenging ) • Tau Trigger will be a big part of the talk though! :-)‏

  8. Proposed Outline • Physics Description • Tau Physics & Phenomenology, Backgrounds • Z production , expected rates , etc • CMS Detector description • Z to tau tau Generator Studies • Acceptance ,mean Pt , Prongs etc. • Tau trigger Studies • L1 Performance, L2 Performance • Since we claim that we intent to apply this study in first runs, Calorimeter HLT Only is enough, unless we are assigned to optimize L25,L3.

  9. Proposed Outline • Reconstruction Performance & Analysis • To be based on the use of the Particle Flow Jet Info to improve the Tau ID • Study Muon/Electron performance • Then extract all standard analysis stuff. • efficiencies, invariant mass distributions etc

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