APFELgrid: a high performance tool for parton density determinations
Abstract
We present a new software package designed to reduce the computational burden of hadron collider measurements in Parton Distribution Function (PDF) fits. The APFELgrid package converts interpolated weight tables provided by APPLgrid files into a more efficient format for PDF fitting by the combination with PDF and evolution factors provided by APFEL. This combination significantly reduces the number of operations required to perform the calculation of hadronic observables in PDF fits and simplifies the structure of the calculation into a readily optimised scalar product. We demonstrate that our technique can lead to a substantial speed improvement when compared to existing methods without any reduction in numerical accuracy.
Keywords
Cite
@article{arxiv.1605.02070,
title = {APFELgrid: a high performance tool for parton density determinations},
author = {Valerio Bertone and Stefano Carrazza and Nathan P. Hartland},
journal= {arXiv preprint arXiv:1605.02070},
year = {2017}
}
Comments
13 pages, 2 figures. Submitted to CPC. Code available from https://github.com/nhartland/APFELgrid