NOTE: This repository has been moved to https://gitlab.com/mcgrid/applgrid2yoda.

applgrid2yoda

This script convolutes an APPLgrid with an LHAPDF and writes out the resulting histograms as YODA files.

usage

./applgrid2yoda [--rivet-id RIVET-ID] \
        [--pdf-set PDF-SET] [--pdf-members PDF-MEMBERS] \
        [--scale-factors REN-SCALE-FACTOR,FAC-SCALE-FACTOR [SCALE-FACTORS...]] GRID

• GRID is the path to the ROOT file written out by APPLgrid (required)
• the RIVET-ID is given by /analysis/histogram, if it is not given, the script will try to construct the Rivet ID from the last two components of the GRID path
• the PDF-SET is the name of the PDF set passed to LHAPDF (optional, default: "CT10")
• PDF-MEMBERS can be given as a single number or a range (optional, default: "0", i.e. the CV PDF member)
  • if a single number (e.g. "7") is given, then only the PDF member for this index will be used
  • if two numbers connected with three dots are given (e.g. "0...52"), they are interpreted as a range including the endpoints
• REN-SCALE-FACTOR the (unsquared) renormalisation scale factor
• FAC-SCALE-FACTOR the (unsquared) factorisation scale factor
• the scale factors are separated by a comma, additional scale pairs are separates by spaces
• identical scale factors in a pair can be given as a single value (e.g. "2.0" instead of "2.0,2.0")

example

./applgrid2yoda --pdf-set CT10 --pdf-members 0...52 \
        mcgrid/MCgrid_CDF_2009_S8383952/d02-x01-y01.root

This will convolute the APPLgrid d02-x01-y01.root with all CT10 members, writing out one YODA file per member. This could be used to generate a PDF error band for the observable. Note that the last two components of the path here give the Rivet ID, so it is not necessary to specify it explicitly.