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WIP: Powheg+Pythia8 reweightings

Davide Gerbaudo requested to merge pp8-rew into fcnc-discr-hack

Reweigthings for the Powheg+Pythia8 samples.

This MR is to follow the same procedure used by the TTHbbLeptonic analysis described in Table 1 (p.22) of HIGG-2017-03-022.pdf.

Useful links:

  • TTbarModelling2016 providing an overview of the original studies
  • Twiki pages by @mcasolin describing the HF classification variables used as input to the reweigthings HFclassificationForRun2, and some description of the reweigthings TtbbNLORw
  • package maintained by @nasbah to apply the most recent reweigthings TTHbbTtbarCorrections
  • example showing how these reweigthings are called within the TTHbbLeptonic code: TTbarReweightingTool.cxx
  • list of samples used by TTHbbLeptonic: spreadsheet (refer to Table 1 for correspondence of systs)
    • 410501 : nominal
    • 41025{012} : Sherpa5F, plus b-filtered samples 41028{123}
    • 410525 : PS & hadronization, plus b-filtered samples 410528
    • 41051{12} : ISR/FSR, plus b-filtered samples 41051{78}
    • 41032{345} : tt+1b Sherpa4F
  • example from @lvalery showing how a similar treatment was implemented for P+P6 in MainAnalysis.cxx within MultibjetsAnalysis: follow the variable dm_HFsyst

Tag for information @juste @orlando @lvalery @farooque

Edited by Nicola Orlando

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