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Fortran HERWIG Status Report and Validation in Athena rel. 14

Fortran HERWIG Status Report and Validation in Athena rel. 14. By Jon Butterworth (UCL) Claire Gwenlan (Oxford) Alessandro Tricoli (RAL). ATLAS MC Generator Meeting, 11 th December 2008. Latest Tags Herwig_i-00-03-15 ← CVS tag HEAD Herwig_i-00-03-13 ← 14.4.0.1 release.

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Fortran HERWIG Status Report and Validation in Athena rel. 14

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  1. Fortran HERWIGStatus Report and Validation in Athena rel. 14 By Jon Butterworth (UCL) Claire Gwenlan(Oxford) Alessandro Tricoli(RAL) ATLAS MC Generator Meeting, 11th December 2008

  2. Latest Tags Herwig_i-00-03-15← CVS tag HEAD Herwig_i-00-03-13 ← 14.4.0.1 release HERWIG status report Many changes in Herwig_i interfacefrom last MC Validation Meeting: From Herwig_i-00-03-03 to Herwig_i-00-03-15 • some related to Charybdis and Alpgen • Fixes in Herwig_i-00-03-10 • addition of Horace to the interface as external generator: • In Herwig_i-00-3-13 • addition of RPV code to Herwig (in a seperate library): • in Herwig_i-00-3-10, fixes in Herwig_i-00-3-12 • fix of the Low Mass Z "ears" in eta • ME correction did not preserve the rapidity of the vector boson in the hard process. Large effect for small x (corrections are enhanced by 1/x) • Modified routine hwbdyp.f (ME corrections for DY processes) in Herwig_i-00-03-13 • bug-fix release of Fortran Herwig “Herwig 6.511” due to come out soon. • fix of the Higgs->WW decays: • reported by the Higgs group, fixed by Bryan Webber and Jon Butterworth, and checked by Tiesheng Dai in Herwig_i-00-03-15 • Bug in the fix corrected in Herwig_i-00-03-15 • several changes & fixes to the parameter setting in the interface: • More steerable parameters • Latest fixes in Herwig_i-00-03-15

  3. Low Mass Z Rapidity “ears” HERWIG status report old version of hwbdyp.f new version of hwbdyp.f Test done by Claire Gwenlan in Fortran Herwig stand-alone (before its implementation in ATHENA) The fix has to be checked withn ATNENA (to do list)

  4. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) • Sample B (14.4.0.1) AODsHerwig_i-00-03-13: • valid1.105100.JimmyWenu.recon.a78 MC8 series (10 TeV) • 500K events!! (Thanks to Osamu) • W and Electron plots look OK: • comparison OK with 10 TeV ref. plots from previous Sample B (14.2.0.2, conf tag a64) (see extra slides for more plots) HERWIG SM validation status report • Private production 14.4.0.1Herwig_i-00-03-15: (small samples) • W→en sample • Comparison OK with Herwig_i-00-03-13 (Sample B) for W and Electron plots • Z→ee sample • Z and Electron distributions look OK W rapidity W pT Ratio Ratio

  5. Sample B (14.4.0.1) AODsHerwig_i-00-03-13: • valid1.105403.SU3_jimmy_susy.recon.a78 MC8 series (10 TeV) • plots look OK compared to ref. plots from previous SampleB (14.2.20.1, config tag a70) HERWIG SUSY validation status report MET C4 truth jets electrons muons more plots in extras

  6. EXTRA SLIDES

  7. Sample-B Plots valid1.105100.JimmyWenu.recon.a78 rel 14.4.0.1, 10 TeV, config tag a78 500K events Using MC8.105100.JimmyWenu.py csc_evgenTruthJetMet08_trf.py Thanks to Osamu!! Compared to previous 10 TeV Sample-B: rel 14.2.0.2, 10 TeV, config tag a64 50 K events

  8. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) HERWIG SM validation W Boson W y W Mass Ratio Ratio W pT Ratio

  9. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) HERWIG SM validation W± Bosons W+ y W- y Ratio Ratio W- pT W+ pT Ratio Ratio

  10. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) HERWIG SM validation Final State Electrons (status==1) From W decay e± Ratio e- e+ Ratio Ratio

  11. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) HERWIG SM validation Final State Electrons (status==1) From W decay ele pT Ratio e- e+ Ratio Ratio

  12. 14.2.0.1 (REF, Sample-B 10 TeV) 14.4.0.1 (Sample-B 10 TeV) W+ - W- W+ + W- e+ - e- e+ + e- HERWIG SM validation Charge Asymmetry in W events W Ratio Electron Ratio

  13. Sample-B Plots valid1.105403.SU3_jimmy_susy.recon.a78 • rel 14.4.0.1, 10 TeV, config tag a78 • 50K events • Using • MC8.105403.SU3_jimmy_susy.py • csc_evgenTruthJetMet08_trf.py • Thanks to Osamu!! • Compared to previous 10 TeV samples (all 50K events): • rel 14.2.20.1 SampleB, 10 TeV, config tag a70 • rel 14.2.0.2 SampleB, 10 TeV, config tag a64 • rel 12.0.6, 10 TeV (privately produced)

  14. HERWIG SUSY validation MET quantities Note: samples from 14.4.0.1 and 14.2.20.1 use the new SUSY SU3 spectrum/decay file 14.2.0.2 and 12.0.6 use the old s/d file, but are shown here to illustrate differences arising from those different files [ for further details on the old versus new spectrum/decay files see fHerwig status report from 9th Sept 2008]

  15. HERWIG SUSY validation electron quantities slight spread in electron mass in 14.4.0.1?

  16. HERWIG SUSY validation muon quantities

  17. HERWIG SUSY validation Differences observed presumably due to the fact that pions from taus were not being decayed in previous rel14 samples (see fHerwig report from 9th Sept. 2008). This is now fixed… photon quantities

  18. HERWIG SUSY validation dilepton masses SSSF elecs+muons OSSF elecs+muons OSSF electrons OSSF muons

  19. HERWIG SUSY validation jet quantities

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