nnpdf / applgrids

APPLgrids for NNPDF

applgrids

APPLgrids for NNPDF

Project summary and aim

The aim of this repository is to store the "official" APPLgrids used by the NNPDF Collaboration. Several grids stored here have been computed with the external repository, however, a smaller number of grids have been generated from experimental collaborations or th. colleagues.

Each folder matches the name of the dataset registered in the apfelcomb project database and reflects the official name used in NNPDF fits through the buildmaster implementation.

Each folder contains a specific README file with the summary information about the grid origin and usage.

Testing code

A small testing code for generating predictions from APPLgrids + LHAPDF is provided in appltest.

Tag policy

This repository is usually tagged before the production of a new NNPDF release so tables have a history.

Commit policy

The update of tables in this repository can be performed directly from developers. New tables must agree with the naming conventions used by other projects.

applgrids's Issues

CDFZRAP with last two grids combined

Commit 1eb397d was supposed to go in a different branch, but I forgot to switch to that branch. However, I didn't overwrite anything so it shouldn't be too bad.

The commit contains the updated root file and the C++ program which combines the last two bins. Performing a convolution with NNPDF31_nlo_as_0118_luxqed before the combination gives

...
bin #26: 3.054914e+00 [pb/GeV] or 3.054914e-01 [pb]
bin #27: 1.433284e+00 [pb/GeV] or 1.433284e-01 [pb]
bin #28: 5.821576e-01 [pb/GeV] or 5.821576e-02 [pb]

and after the combination

...
bin #26: 3.054914e+00 [pb/GeV] or 3.054914e-01 [pb]
bin #27: 1.007721e+00 [pb/GeV] or 1.007721e-01 [pb]
bin #28: -nan [pb/GeV] or -nan [pb]

which are the correct values; bin 26 is unchanged, bin 27 has the average of two combined bins, and bin 28 must be cut away before generating the FK table.

I haven't checked the FK table generation, let me know if there are any problems - there might be because APPLgrid doesn't really combine the grids internally, only when convoluting.