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Gen 5 MC validation… ( top mass template )  Rec. Mtop - Pythia 5.3.2 vs 4.11.1 (-0.9) - Herwig 5.3.1 vs 4.11.1 (-0.7) - Herwig 5.3.2 vs 4.11.1 (+3.3)

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Presentation on theme: "Gen 5 MC validation… ( top mass template )  Rec. Mtop - Pythia 5.3.2 vs 4.11.1 (-0.9) - Herwig 5.3.1 vs 4.11.1 (-0.7) - Herwig 5.3.2 vs 4.11.1 (+3.3)"— Presentation transcript:

1 Gen 5 MC validation… ( top mass template )  Rec. Mtop - Pythia 5.3.2 vs 4.11.1 (-0.9) - Herwig 5.3.1 vs 4.11.1 (-0.7) - Herwig 5.3.2 vs 4.11.1 (+3.3) - but Mtop=178 for 5.3.2 Pythia and Herwig  What is wrong in Pythia 5.3.2? - Herwig (Mtop: 175->178) 2% up, Pt(W,b) - Pythia (Mtop: 175->178) 2% up for Pt(b), 2% down for Pt(W) Mtop=170.6 Mtop=169.9 Mtop=170.6 Mtop=173.9 Mtop=170.9 Mtop=170.0

2 Gen 5: Top mass tempalte anal. (Herwig) 5.3.14.11.1 Partons found0.93 matched Jets 0.560.55 Right comb.0.580.60 Chisq cut0.79/0.850.77/0.82 b-tag for candiate evt 0.490.60 b-tag eff. is reduced by 15%, Does this mean that scale factor is now closed to 1?

3 Herwig 6.504 + Photos ( for10k ttbar events) uds W(mainly lepton channel) t->bg

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