fortran herwig status report and validation in athena rel. 14
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Fortran HERWIG Status Report
and Validation in Athena rel. 14
By
Jon Butterworth (UCL)
Claire Gwenlan (Oxford)
Alessandro Tricoli (RAL)
ATLAS MC Generator Meeting, 11th December 2008
HERWIG status reportHERWIG status report
Many changes in Herwig_i interfaceMany changes in Herwig_i interface from last MC Validation Meeting:From Herwig_i-00-03-03 to Herwig_i-00-03-15
– some related to Charybdis and Alpgensome related to Charybdis and Alpgen
• Fixes in Herwig_i-00-03-10 Fixes in Herwig_i-00-03-10
– addition of Horace to the interface as external generator:addition of Horace to the interface as external generator:
• In Herwig_i-00-3-13In Herwig_i-00-3-13
– addition of RPV code to Herwig (in a seperate library):addition of RPV code to Herwig (in a seperate library):
• in Herwig_i-00-3-10, fixes in Herwig_i-00-3-12in Herwig_i-00-3-10, fixes in Herwig_i-00-3-12
– fix of the Low Mass Z "ears" in etafix 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)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-00-03-13Modified 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. bug-fix release of Fortran Herwig “Herwig 6.511” due to come out soon.
– fix of the Higgs->WW decays: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-00-03-15reported 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-00-03-15Bug in the fix corrected in Herwig_i-00-03-15
– several changes & fixes to the parameter setting in the interface:several changes & fixes to the parameter setting in the interface:
• More steerable parametersMore steerable parameters
• Latest fixes in Herwig_i-00-03-15 Latest fixes in Herwig_i-00-03-15
Latest TagsHerwig_i-00-03-15 ← CVS tag HEADHerwig_i-00-03-13 ← 14.4.0.1 release
HERWIG status reportHERWIG status reportLow Mass Z Rapidity “ears”
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)
HERWIG HERWIG SMSM validation status report validation status reportSample B (14.4.0.1) AODsSample B (14.4.0.1) AODs Herwig_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)see extra slides for more plots)
Private production 14.4.0.1Private production 14.4.0.1 Herwig_i-00-03-15Herwig_i-00-03-15: : (small samples)(small samples)
W→e 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
14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
Ra
tio
Ra
tio
HERWIG HERWIG SUSYSUSY validation status report validation status reportSample B (14.4.0.1) AODsSample B (14.4.0.1) AODs Herwig_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)
more plots in extras
C4 truth jets
MET
electrons muons
EXTRA SLIDES
Sample-B Plots
rel 14.4.0.1, 10 TeV, config tag a78500K events
UsingMC8.105100.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
valid1.105100.JimmyWenu.recon.a78
HERWIG SM validation
W Boson14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
W pT
W MassW y
Ra
tio
Ra
tio
Ra
tio
HERWIG SM validation W± Bosons
W- yW+ y
14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
W+ pT W- pT
Ra
tio
Ra
tioR
atio
Ra
tio
HERWIG SM validation Final State Electrons (status==1)
From W decay
e- e+
e±
14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
Ra
tio
Ra
tio
Ra
tio
HERWIG SM validation Final State Electrons (status==1)
From W decay
e- e+
ele pT
14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
Ra
tio
Ra
tio
Ra
tio
HERWIG SM validation Charge Asymmetry in W events
W
Electron
W+ - W-
W+ + W-
e+ - e-
e+ + e-
14.4.0.1 (Sample-B 10 TeV)
14.2.0.1 (REF, Sample-B 10 TeV)
Ra
tioR
atio
Sample-B Plots
rel 14.4.0.1, 10 TeV, config tag a7850K events
UsingMC8.105403.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)
valid1.105403.SU3_jimmy_susy.recon.a78
MET quantities
HERWIG SUSY validation
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]
electron quantities
HERWIG SUSY validation
slight spread in electron mass in 14.4.0.1?
muon quantities
HERWIG SUSY validation
photon quantities
HERWIG SUSY validationDifferences 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…
dilepton masses
HERWIG SUSY validation
OSSF elecs+muons SSSF elecs+muons
OSSF electrons OSSF muons
jet quantities
HERWIG SUSY validation
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