Add luminosity channels

[Zaharid]

This adds lumi channels corresponding to the main production channels for W and Z bosons.

[Zaharid]

Example https://vp.nnpdf.science/aAiBE9KfTYuDLv0jb8iGQw==/

[scarlehoff]

Wouldn't it be better to have a parser so that one can use any combination? We have all the information necessary to understand things like:

lumi_channel: (u ubar, d dbar)

available

nnpdf/validphys2/src/validphys/pdfbases.py

Line 533 in 7eb0c4e

PDF4LHC20 = LinearBasis.from_mapping({

[Zaharid]

I’d be happy to review such a pr. But it’s not this one. On 21 Jun 2023, at 16:04, Juan M. Cruz-Martinez ***@***.***> wrote: Wouldn't it be better to have a parser so that one can use any combination? We have all the information necessary to understand things like: lumi_channel: (u ubar, d dbar) available https://github.com/NNPDF/nnpdf/blob/7eb0c4eb67604a7d0b80f9a8ac075aab994904cc/validphys2/src/validphys/pdfbases.py#L533 —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[Zaharid]

Baring the very flaky tests, I'd like to merge this as is.

[scarlehoff]

I've added the comments with the change Xlum -> Xlum1 to signal it is only first generation quarks because I have the feeling this is the kind of thing that will come back to bite it in the future "wait, why does the Z luminosity remain unchanged even if the charm has changed a lot"

But not a worthy hill to die on and I'm happy also with being able to say "I told you so" when it eventually happens so feel free to merge.