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HERWIG validation report

This report documents the HERWIG validation process for MC11 production, particularly focusing on the HERWIG version 6.520 and the new AUET2-LO** tune. Validation was conducted on the migration from MC10 to MC11 Job Options, assessing the performance of various samples including SUSY analysis. Key findings indicate no problematic issues across validation samples, with distributions appearing consistent and within expectations. Additional checks are planned to explore observable differences related to the HERWIG update and tuning changes.

mechelle-george
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HERWIG validation report

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  1. HERWIG validation report ATLAS MC Validation Meeting, 24 May 2011 Responsibles: Jon Butterworth (UCL), Claire Gwenlan (Oxford), Daniela Rebuzzi (Pavia, INFN) Today: validation for MC11 (16.6.5.Y, AUET2-LO** tune, HERWIG 6.520) (SM validation: D. Rebuzzi; SUSY validation: C. Gwenlan)

  2. Fortran HERWIG validation AIM • Validation of athena 16.6.5.Y (including MC10JobOptions to MC11JobOptions migration, change to new evgen transform Generate_trf.py, HERWIG version update and new AUET2-LO** tune) for MC11 production • Check impact of new “AUET2-LO**” tune for Herwig/Jimmy • details documented in ATL-PHYS-PUB-2011-008 NB HERWIG version updated to 6.520 for MC11 [majority of updates in 6.520 already in our patches for 6.510] • validation samples • 15.6.14.7, MC10JobOptions, AUET1 tune (Baseline MC10 sample) • 16.6.5.3, MC11JobOptions, AUET1 tune [checking athena and HW version updates only] • 3. 16.6.5.3, MC11JobOptions, AUET2-LO** tune Conclusion: no problematic issues observed 1

  3. HERWIG SUSY validation • Validation SampleBs (50k events) • mc10_valid.105403.SU3_jimmy_susy.recon.AOD.e787_a124 (MC10JOs, 15.6.14.7, AUET1 tune) • private samples (MC11JOs, 16.6.5.3, HW 6.520, AUET1 tune) • mc11_valid.105403.SU3_jimmy_susy.recon.AOD.e789_a124 (MC11JOs, 16.6.5.3, HW 6.520, AUET2) example: dilepton mass (OSSF) ratio of black/red SUSY validation: all distributions looks sensible and within expectations (one small issue I would like to understand a bit better – see later) 2

  4. HERWIG SUSY validation Some more examples (further plots in extras) – look OK MET number of events number of events Anti-Kt4 truth jets number of events number of events electrons 3

  5. HERWIG SUSY validation Possibly some observable difference in e.g. jet multiplicity • Trend appears more to do with athena/HERWIG update than due to PDF/tune change i.e. green and black, run in same athena version but with different tunes, look similar pT > 20GeV, |eta|<5 number of events Anti-Kt4 4

  6. Summary validation status: • 16.6.5.3 (MC11JobOptions) checked against baseline of 15.6.14.7 (MC10JobOptions) • Log files visually checked to ensure correct parameter settings ✔ • Distributions look sensible given new PDF/tune (and HERWIG version) • AUET2-LO** tune vs AUET1-LO* (using 16.6.5.3; MC11JobOptions) • Some differences observed in e.g. jet multiplicities – appears to be to do with (athena/)HERWIG update rather than tune • (differences are likely understandable; will perform some more checks to pin down in next couple of days) 5

  7. Extras 6

  8. HERWIG SUSY validation (cont.) SampleB plots using Evgen_trf.py (r15) or Generate_trf.py (r16) @ 7TeV (followed by csc_addTruthJetMet_trf.py) config tags: 1. e787 (MC10 JOs, 15.6.14.7, AUET1-LO* tune) 2. private samples (MC11 JOs, 16.6.5.3, AUET1-LO* tune) 3. e789 (MC11 JOs, 16.6.5.3, AUET2-LO** tune) 7

  9. HERWIG SUSY validation MET quantities number of events number of events ratios of black/red 8

  10. HERWIG SUSY validation electron quantities number of events number of events number of events number of events 9

  11. HERWIG SUSY validation electron quantities ratios of black/red 10

  12. HERWIG SUSY validation muon quantities number of events number of events number of events number of events 11

  13. HERWIG SUSY validation muon quantities ratios of black/red 12

  14. HERWIG SUSY validation photon quantities number of events number of events number of events number of events 13

  15. HERWIG SUSY validation photon quantities ratios of black/red 14

  16. HERWIG SUSY validation dilepton masses number of events number of events OSSF elecs+muons SSSF elecs+muons number of events number of events OSSF electrons OSSF muons 15

  17. HERWIG SUSY validation dilepton masses ratios of black/red 16

  18. HERWIG SUSY validation jets quantities: anti-kt4 number of events number of events pT > 20GeV, |eta|<5 number of events number of events 17

  19. HERWIG SUSY validation jets quantities: anti-kt4 ratios of black/red 18

  20. HERWIG SUSY validation jets quantities: cone4 number of events number of events pT > 20GeV, |eta|<5 number of events number of events 19

  21. HERWIG SUSY validation jets quantities: cone4 ratios of black/red 20

  22. HERWIG SUSY validation SUSY “4-jet, 0-lepton” analysis (anti-kt4 jets) number of events number of events number of events number of events 21

  23. HERWIG SUSY validation SUSY “4-jet, 0-lepton” analysis (anti-kt4 jets) ratios of black/red 22

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