PDF Choice Ignored For Shower in MG5amcNLO + PY8.2
Hi Folks,
I am playing with my PY8.2 parton shower settings for pp > tt~ [QCD] in MG5amcNLO + PY8.2 and am noticing that the default PDF used for the parton shower does not change when I select a new PDF for event generation with amcNLO. Specifically, I am talking about the "PDF:pSet = 13" switch in the file "MCatNLO/
My understanding of MCatNLO_
lhapdf = pdlabel
260000 = lhaid
and generating events, Pythia8.cmd still contains
PDF:pSet = 13 ! PDF set used in showers and multiparton interactions (13 = NNPDF2.3 QCD+QED)
I am unsure if this is a bug or feature, but I feel it can easily result in inconsistent treatment of the parton shower if a warning is not made somewhere in the shower_card.dat.
cheers,
richard
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- Olivier Mattelaer
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