Assessing the Impact of Fitting Methodology at aN${}^3$LO with FPPDF: an Open Source Tool for Extracting Parton Distribution Functions in the Hessian Approach

J. M. Cruz-Martinez, T. Giani, L. A. Harland-Lang

We present a new public code, FPPDF, to perform global fits of parton distribution functions (PDFs). The fitting methodology follows that implemented by the MSHT collaboration, nam…