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ME-MC comparison

ME-MC comparison. Standard Inputs so far ALPGEN GRAPPA MadGraph Generated processes ALPGEN (xs by mlm) W ,Z,DY + nj, n=0..5 Wbb,Zbb,DYbb + nj, n=0..3 GRAPPA W,Z + nj, n=0..2 W+3j available, xs by S. Tsuno Wbb + 0j, xs by S. Tsuno MadGraph W,Z + nj, n=0..3 Wbb,Zbb + nj, n=0..1.

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ME-MC comparison

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  1. ME-MC comparison • Standard Inputs so far • ALPGEN • GRAPPA • MadGraph • Generated processes • ALPGEN (xs by mlm) • W,Z,DY + nj, n=0..5 • Wbb,Zbb,DYbb + nj, n=0..3 • GRAPPA • W,Z + nj, n=0..2 • W+3j available, xs by S. Tsuno • Wbb + 0j, xs by S. Tsuno • MadGraph • W,Z + nj, n=0..3 • Wbb,Zbb + nj, n=0..1

  2. Summary of Results • W+n jets • MG<AL by (0.5,3,5,6) % n=0..3 • GR & AL agree • Z+n jets • Everything ~OK • Wbb+n jets • MG>AL by (6, 2) % n=0..1 • GR & AL agree for n=0 • Zbb+n jets • MG>AL by (8, 6) % n=0..1

  3. Conclusions • Need to understand differences between ME-MCs • Study relative fractions by subprocesses • Compare kinematic distributions • Communication with authors • Work in progress • Generate remaining processes • CompHEP tunning • Shower -> Ntuples->kinematic distributions • Get NLO rates from MCFM

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