[Hadstruct] [EXTERNAL] Further work with NNPDF

[Joseph Karpie]

Hey everyone,

As some of you may know, a few of us are wrapping up a paper with Luigi Del
Debbio and Tommaso Giana (NNPDF people) where they reanalyse our Gaussian
smeared results using their tools. Tommaso sent around a number of
suggestions for things to begin studying next, such as studying fit forms
and using only high or low Ioffe time data.

They have experience using sophisticated methods to perform the inverse and
ways of accounting for systematic errors which can be very useful to us. I
think we should discuss Friday what future work we would like to be doing
with them.

For example, I'd like to do a comparison of our Gaussian smeared results
with the distillation results that have been made on the same ensemble when
they are finalized. My thought is that the data are more or less
consistent, but Colin's fits appear to have significantly better agreement
with pheno results in the x > 0.5 region than my own fits or Tommaso's
NNPDF fits to the Gaussian smeared data. I want to understand what
difference between the results created this dramatic improvement. I believe
working with NNPDF would make this task significantly easier due to their
experience and tools.

Best,
Joe
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