APFELgrid: a high performance tool for parton density determinations
Valerio Bertone, Stefano Carrazza, Nathan P. Hartland
TL;DR
APFELgrid is a high-performance software tool that accelerates hadron collider measurements in PDF fits by converting and optimizing computational tables, achieving faster calculations without losing accuracy.
Contribution
The paper introduces APFELgrid, a novel software package that enhances computational efficiency in PDF fits by combining APPLgrid tables with APFEL evolution factors.
Findings
Significant speed improvements over existing methods.
No loss of numerical accuracy in calculations.
Simplified calculation structure for faster processing.
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.
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