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MC validations on top signal MC (part II)

MC validations on top signal MC (part II). U.K. Yang Sep-25-04 Simulation meeting. Comparison of mean (MPV) values in Top mass templates at HEPG particle levels (smeared jets). Pythia (lower Mtop): wrong Pt(Z) tuning => New Pythia ttopel with correct tune

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MC validations on top signal MC (part II)

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  1. MC validations on top signal MC (part II) U.K. Yang Sep-25-04 Simulation meeting Comparison of mean (MPV) values in Top mass templates at HEPG particle levels (smeared jets) • Pythia (lower Mtop): wrong Pt(Z) tuning => New Pythia ttopel with correct tune • Herwig (higher Mtop): Herwig V 6.504 vs V 6.4 =>New Herwig V6.504 (ttopgl) with Mtop=175, no QED photon

  2. Comparison of Herwig v6.504 vs V6.4V6.504 (= 5.3.3) vs V6.4 (=4.9.1) :Mtop=175, no QED Pt_lep • Final state objects (b,W, lepton) : they agree each other

  3. Comparison of Herwig v6.504 vs V6.4V6.504 (= 5.3.3) vs V6.4 (=4.9.1) :Mtop=175, no QED • But jets (out of final state parton): b jet, Wjets are very different. How does this happen?

  4. Total energy conservation? Pythia V532(Toronto): ttopui V533(CAF): ttopgl V532(Toronto): ttopti • Herwig 5.3.2 and 5.3.3 top signal/various top mass/dijet samples using Toronto and CAF have same problem • But Herwig 5.3.1 top sample (using Toronto): ttopht is fine • What happened from 5.3.1 to 5.3.2? • Linux compiler change… • Herwig 6.500 -> Herwig 6.504 with Photos package

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