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• TrigDecisionTool, Trigger Aware Analysis in v13 (under construction)
• PythonAnalysis, Python based Athena and ROOT Analysis

• PP.Sandbox - try out TWiki on your own
• MatthewTamsettSandbox - just for me

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• 03/09/09 SUSY Working Group http://indico.cern.ch/conferenceDisplay.py?confId=66331 tamsett_SUSY_0309.pdf: tamsett_SUSY_0309.pdf This concerned parameterised trigger efficiencies for trilepton events accross mSUGRA parameter space, using the SUSY grid points generated by the Freiburg and Wisconsin groups.
• 26/05/09 SUSY EtMiss http://indico.cern.ch/conferenceDisplay.py?confId=49342 tamsett_3l_trig_260509.pdf: tamsett_3l_trig_260509.pdf This talk showed electron and muon trigger efficiency determination for all leptons and trileptons in events, as well as event level trigger efficiencies for trilepton events. Also shown was a brief signal acceptance plot.
• 07/04/09 IoP Final talk can be found here http://indico.cern.ch/sessionDisplay.py?sessionId=17&slotId=0&confId=40295#2009-04-07. IoP_09.pdf: oP_09.pdf
• 07/04/09 IoP meeting Draft Talk with extra plots for Antonella; IoP_09_draft1.ppt, pdf of final talk; IoP_09_update.pdf, Short 12 minute talk summarizing ATLAS, trigger and 2008 work SUSY trigger work.
• 16/03/09 Top Trigger Meeting Top specific talk using tight etcone20 cuts (<6 GeV), SUSY style jet veto still applied. http://indico.cern.ch/conferenceDisplay.py?confId=53240 TopTrigger_160309.pdf: TopTrigger_160309.pdf

Publications

Primary Author

• Electron Trigger Efficiency Determination from Data and its Application in a Supersymmetric Environment. Tamsett, MC (Royal Holloway, University of London); De Santo, A (University of Sussex); Royal Holloway, University of London.); Fonseca-Martin, T (Royal Holloway, University of London). ATL-COM-PHYS-2009-407. Under review for Int status.

Named Contributor

• "Reconstruction and Identification of Electrons", "Reconstruction and Identification of Photons", "Reconstruction of Photon Conversions", "Reconstruction of Low-Mass electron Pairs", "The ATLAS Trigger for Early Running", "Physics Performance Studies and Strategy of the Electron and Photon Trigger Selection" and "Dilepton Resonances at High Mass", all in CERN-OPEN-2008-020, arXiv:0901.0512, Geneva, Dec 2008.

• 26/05/09 SUSY EtMiss http://indico.cern.ch/conferenceDisplay.py?confId=49342 tamsett_3l_trig_260509.pdf: tamsett_3l_trig_260509.pdf This talk showed electron and muon trigger efficiency determination for all leptons and trileptons in events, as well as event level trigger efficiencies for trilepton events. Also shown was a brief signal acceptance plot.

• 07/04/09 IoP Final talk can be found here http://indico.cern.ch/sessionDisplay.py?sessionId=17&slotId=0&confId=40295#2009-04-07. IoP_09.pdf: IoP_09.pdf

• 07/04/09 IoP meeting Draft Talk with extra plots for Antonella; IoP_09_draft1.ppt, pdf of final talk; IoP_09_update.pdf, Short 12 minute talk summarizing ATLAS, trigger and 2008 work SUSY trigger work.
• 16/03/09 Top Trigger Meeting Top specific talk using tight etcone20 cuts (<6 GeV), SUSY style jet veto still applied. http://indico.cern.ch/conferenceDisplay.py?confId=53240 TopTrigger_160309.pdf: TopTrigger_160309.pdf

• IoP_09_draft1.odp: IoP_09_draft1.odp

• 05/02/09 Beatenberg Trigger workshop. Talk on leptonic trigger efficiency determination from data in a top/SUSY context. Includes my work on 2D, 3D and 3*1D parameterisation in rel 13. Also included is some work from NIKHEF on the use of orthogonal triggers to determine muon trigger efficiencies using the jet trigger on top events. http://indico.cern.ch/conferenceDisplay.py?confId=44626 Beatenberg_0209_1.pdf: Beatenberg_0209_1.pdf
• 22/01/09 SUSY trigger meeting, preperation for Beatenburg. Talk focuses on electron trigger efficiency measurement from Z->ee tag and probe in the context of 14TeV SUSY using the EF_e25i_tight trigger. Followed by a discussion of lepton triggers and acceptance in the 10^31 menu. http://indico.cern.ch/conferenceDisplay.py?confId=48476 SUSY_trig_220109.pdf: SUSY_trig_220109.pdf
• 19/01/09 TAPM egamma Beatenberg Trigger workshop preperation. http://indico.cern.ch/conferenceDisplay.py?confId=45115. Comments included the desire to use trigger e20 (e20_loose in newer versions) to extrapolate ttbar efficiencies as this is what would be done in first data. tapm_egamma_190109.ppt: tapm_egamma_190109.ppt
• 07-09/01/09 UK Atlas week, Oxford 7->9 January, Overview of triggering for SUSY and exotics. http://www.physics.ox.ac.uk/atlas2009/index.asp, tamsett_susytrig_090109(3).pdf: tamsett_susytrig_090109(3).pdf
• 06/11/08 egamma. Explains use of 2D/3D parameterisations taken from Z->ee MC and applied to ttbar events. Shown that a 3D parameterisation in Et, Eta and etcone40 parameterises trigger efficiencies in Z->ee and ttbar correctly to within errors. http://indico.cern.ch/conferenceDisplay.py?confId=39297, tamsett_egamma_061108(2).pdf: tamsett_egamma_061108(2).pdf
• 2009 Template Template_09.sxi: Template_09.sxi

• 22/01/09 SUSY trigger meeting, preperation for Beatenburg. Talk focuses on electron trigger efficiency measurement from Z->ee tag and probe in the context of 14TeV SUSY using the EF_e25i_tight trigger. Followed by a discussion of lepton triggers and acceptance in the 10^31 menu. http://indico.cern.ch/conferenceDisplay.py?confId=48476 SUSY_trig_220109.pdf: SUSY_trig_220109.pdf

• 06/11/08 egamma. Explains use of 2D/3D parameterisations taken from Z->ee MC and applied to ttbar events. Shown that a 3D parameterisation in Et, Eta and etcone40 parameterises trigger efficiencies in Z->ee and ttbar correctly to within errors. http://indico.cern.ch/conferenceDisplay.py?confId=39297, tamsett_egamma_061108(2).pdf: tamsett_egamma_061108(2).pdf

• 07-09/01/09 UK Atlas week, Oxford 7->9 January, Overview of triggering for SUSY and exotics. http://www.physics.ox.ac.uk/atlas2009/index.asp, tamsett_susytrig_090109(3).pdf: tamsett_susytrig_090109(3).pdf
• 19/01/09 TAPM egamma Beatenberg Trigger workshop preperation. http://indico.cern.ch/conferenceDisplay.py?confId=45115. Comments included the desire to use trigger e20 (e20_loose in newer versions) to extrapolate ttbar efficiencies as this is what would be done in first data. tapm_egamma_190109.ppt: tapm_egamma_190109.ppt

Presentations 2009

• egamma 06/11/08. Explains use of 2D/3D parameterisations taken from Z->ee MC and applied to ttbar events. Shown that a 3D parameterisation in Et, Eta and etcone40 parameterises trigger efficiencies in Z->ee and ttbar correctly to within errors. http://indico.cern.ch/conferenceDisplay.py?confId=39297, tamsett_egamma_061108(2).pdf: tamsett_egamma_061108(2).pdf
• 2009 Template Template_09.sxi: Template_09.sxi
• UK Atlas week, Oxford 7->9 January, Overview of triggering for SUSY and exotics. http://www.physics.ox.ac.uk/atlas2009/index.asp, tamsett_susytrig_090109(3).pdf: tamsett_susytrig_090109(3).pdf

• RHUL_SUSY_081008.pdf: RHUL_SUSY_081008.pdf

• SUSY_WG_250608.ppt: SUSY_WG_250608.ppt

• RHUL_SUSY_230608.ppt: RHUL_SUSY_230608.ppt

Example SUSY Analysis

• Different event topology
• Differences coming from different Et, eta... distributions, might be solved with a more careful average?
• Differences affecting isolation criteria (or other trigger selection cuts)
• Are jets faking offline electrons in the SU3 sample being the trigger less efficient for them?

sub-tasks

28/05/08

Hi,

Draft plans (for medium term) + plots;

Overall aim; Discover reason for differences between SU3 and Z->ee electron trigger efficiencies. Datasets needed (overall): ttbar, SUX(3), Z->ee, Z->ee +jets (this isn't available in rel.13 (resimulate ourselves?) sub-tasks

1. Investigate SUSY truth distributions
2. Investigate truth matching to reco electrons and effect on efficiencies
3. Investigate correlations between variables and events that pass(fail) the trigger
4. look in low pass features (due to offline reco issue where we see two electrons very close in eta/phi with different cluster Ets) (this is the electrons which appear in the L2 normalised to L1 and EF normalised to L2 where we appear to have electrons passing the trigger with Pts below threshold.

Details i) talk to 'truth expert' (till?) about how to match to truth. (much quicker than teaching myself) --also needed for ii) plot - true e - eta, phi, Et etc... deltaR from jet, Pt of closest Jet etc. ii) understand truth matching. efficiences before and after matching (redefine control sample), also true variables of those matched reco electrons that fail trigger - true mothers of e that fail/pass trigger iii) E, Et, phi etc of closest jet in pass(fail) electrons, pass(fail) eta vs e of closest jet, E vs delta R of closest jet - correlations between eta and Et, E and eta, selection cuts vs Et, eta and selection cuts (cuts vs cuts will take longer) - look into efficiencies as a function of dR from nearest jet (with Pt above some threshold), and some measure of hadronic activity such as Meff iv) associate to trigger in deltaR and delta Et (long term), error counters and deltaR, Et, eta phi distributions etc.

date

My Plots

• Eff_comparison.ps: e25i_tight trigger efficiency comparison for Zee, ttbar and SU3

• SU3_NormRecoVarComp.ps: Pass/Fail e25i_tight -some offline variable distributions for SU3

• Zee_NormRecoVarComp.ps: Pass/Fail e25i_tight -some offline variable distributions for Zee

• SU3_Zee_Comp_NormRecoVarComp.ps: Pass/Fail e25i_tight -some offline variable distributions comparisons between SU3 and Zee

• Zee_SU3_ttbar_NormTrigVarComp.ps: Normalised Trigger Variable comparison for Zee, SU3 and ttbar

• SUSY_WG_210508_v4.pdf: SUSY_WG_210508_v4.pdf

• SUSY_WG_210508_v3.pdf: SUSY_WG_210508_v3.pdf

• SUSY_WG_210508_v2.pdf: SUSY_WG_210508_v2.pdf

• SUSY_WG_210508_v1.pdf: SUSY_WG_210508_v1.pdf

Following discussion with Teresa my plans are as follows;

What i'd like to be able to show at the SUSY meeting on 21st May

• Susy electron trigger efficiencies with the following plots:
  • • A few of the most interesting triggers for a highish luminosity scenario (say e25i and e25)
    • efficiency as a function of
    • Eta
    • Phi
    • PT
    • Other relavent variables such as distance of electron from jet, number of nearby objects etc

This is the end result, but in order to validate this the following plots will be needed;

• Method validation vs some independent trigger efficiency determining method.

• Plots of all trigger variables seen in ROIs that pass triggers and comparisons to expected distributions.
  • • to do this for cases when more than one track of ev object are seen in the ROI have been planned for but not yet implemented. Coding of this method should take an afternoon.
    • adding the histograms should take a day or so. These can then be studied.
• Characterization of SUSY samples to determine which variables may affect the trigger
  • • so plots of the trigger cut variables will be produced along with electron Pt, Jet number, delta R between jets and electron etc
    • and comparison of this to the Z->ee sample. This should help if any discrepancy is seen between the trigger efficiencies in each sample

Note; What definition of SUSY sample should be used, my first idea would be to implement the CSC note cuts for the 3, 2 and 1 lepton analysis and look at the characterizations and trigger efficiencies seen after each analysis.

My Trigger Decision Tool status;

• Validated vs Orthogonal trigger decision method.
• All single electron triggers are included.
• All objects and trigger variables are stored with the following exceptions;
  • • Multiple L2 tracks and multiple objects per EF container.
    • short term solution store highest Pt object (1 hour)
    • medium term, store all and analysis for differences. (1 afternoon)
    • long term, inquire with L2 and EF trigger experts (some of this is already in progress), to determine final solution. (no idea how long this will take)

• More counters and validation histograms must be added (eta; one afternoon)

nTuple analysis Status;

• pyroot analysis tools are setup to;
  • • validate my trig decision tool
    • apply susy cuts
    • perform tag and probe analysis
    • compare tag and probe to susy eff for Pt eta and phi

My proposed timeline; Add short or medium term solution to multiple objects, and possible add automated validation vs independent method tool then submit jobs to the grid to give results for Z->ee, SU3 and ttbar. This should be done this afternoon and the samples should be available tomorrow. Then perform a quick analysis with my nTuple tools to get an idea of how tag and probe on z->ee compares to SUSY. Then begin characterization of SUSY sample.

To Do list

1. Write up twiki

Producing nTuples from AODs that contain Electron trigger information using the TrigDecisionTool

Matthew Tamsett

My Analysis

April 2008

Producing nTuples from AODs that contain Electron trigger information using the TrigDecisionTool

Python based Athena and ROOT Analysis

Z->ee, Tag and Probe Analysis

SUSY Analysis

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