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This presentation discusses the generation of W+jets with a cut on the W boson transverse momentum. It covers the use of Alpgen packages in Athena releases, dataset production with Z to tau tau decay modes, job failures encountered, and potential solutions. The analysis aims to understand failures in job production for specific decay modes and the compatibility of different software versions. Future steps include producing more official datasets and deciding on private production or requesting team assistance.
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Generation of W+jets with cut on W pt Alexander Solodkov IHEP, Protvino Sanya.Solodkov@cern.ch
Software versions • Following recommendation of Philippe Calfayan I tried to run modified version of Alpgen with cut on boson pt • Last Athena release – 17.7.0 contains latest versions of all Alpgen packages, it means that production can be easily done on the grid • External/AlpGen-00-00-06 uses Alpgen v2.1.4.p5 • Generators/AlpGen_i-00-00-43 • Generators/AlpGenControl-00-00-22 Sanya.Solodkov@cern.ch
Test with Z tau tau Np1 • For first test with cut on Z pt the following datasets were produced (5000 events each) • 147122.ZtautauNp1 - no pt cut • 147154.ZtautauNp1 - 0 < pt < 40 • 147186.ZtautauNp1 - 40 < pt < 70 • 147218.ZtautauNp1 - 70 < pt < 140 • 147250.ZtautauNp1 - 140 < pt < 280 • 147282.ZtautauNp1 - 280 < pt < 500 • 147314.ZtautauNp1 - 500 < pt Sanya.Solodkov@cern.ch
Test with Z tau tau Np1 • For pt > 500 GeV job failed with error: • TestHepMC ERROR EFFICIENCY IS TOO LOW! 97.9624% found, but at least: 98% required AthenaEventLoopMgr ERROR Error in Algorithm Finalize severity=ERROR severity=ERROR • Had to rerun job with extra parameter • postExec=topAlg.TestHepMC.EffFailThreshold=0.975 • Next few slides – attempt to reproduce plot shown in this presentation: • https://indico.cern.ch/getFile.py/access?contribId=2&resId=0&materialId=slides&confId=254873 Sanya.Solodkov@cern.ch
Test with Z tau tau Np1 (no sum) Sanya.Solodkov@cern.ch
Test with Z tau tau zoomed Sanya.Solodkov@cern.ch
Test with Z tau tau stacked hist Sanya.Solodkov@cern.ch
Test with Z tau tau stacked hist Sanya.Solodkov@cern.ch
Test with W+jets • W+njets without pt cut and with pt>150 cut were produced for 3 possible decay modes and number of jets 0 <= n <=5 – 36 datasets in total • 6 jobs failed • WenuNp5incl • WtaunuNp5incl • WenuNp0_pt150 • WenuNp5incl_pt150 • WmunuNp0_pt150 • WtaunuNp0_pt150 Sanya.Solodkov@cern.ch
Test with W+jets • In failed jobs errors are always similar • At line 108 of file ../src/initalpgen.F (unit = 71, file = 'inparmAlpGen.dat') • Fortran runtime error: End of file • At line 2064 of file ../alplib/alpgen.f (unit = 11, file = 'alpout.par') • Fortran runtime error: End of file • At line 3614 of file ../alplib/alpgen.f (unit = 11, file = 'alpout.par') • Fortran runtime error: End of file • Log files are available at http://cern.ch/solodkov/alpgen • Asked Philippe if he knows what’s wrong Sanya.Solodkov@cern.ch
W e nu + 1,2,3,4 jetss Sanya.Solodkov@cern.ch
W mu nu + 1,2,3,4 jetss Sanya.Solodkov@cern.ch
W tau nu + 1,2,3,4 jetss Sanya.Solodkov@cern.ch
Conclusions • Event generation with cut on boson pt seems to be working • WlnuNp1 – WlnuNp4 are fine • Still need to understand the reason of failures in some jobs for Np0 and Np5inclusive • I guess next step – to produce more “official” datasets • How to proceed ? • Private production or request to production team ? • Which release should be used ? • Output from 17.7.0 might be incompatible with 17.2.X.Y • How many events are needed ? Sanya.Solodkov@cern.ch