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arXiv · 1907.12177

Updating and Optimizing Error PDFs in the Hessian Approach. Part II

Tie-Jiun Hou·Zhite Yu·Sayipjamal Dulat·Carl Schmidt·C. -P. Yuan
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Abstract

In an earlier publication, we introduced the software package, {\tt \texttt{ePump}} (error PDF Updating Method Package), that can be used to update or optimize a set of parton distribution functions (PDFs), including the best-fit PDF set and Hessian eigenvector pairs of PDF sets (i.e., error PDFs), and to update any other set of observables, in the Hessian approach. Here, we validate the {\tt \texttt{ePump}} program with a detailed comparison against a full global analysis, and we demonstrate the potential of {\tt \texttt{ePump}} by presenting selected phenomenological applications relevant to the Large Hadron Collider. For example, we use the package to estimate the impact of the recent LHC data of the measurements of $W$, $Z$ boson and top quark pair differential distributions on the CT14HERA2 PDFs.

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Tie-Jiun Hou, Zhite Yu, Sayipjamal Dulat, Carl Schmidt, C. -P. Yuan. 2019-07-29. Updating and Optimizing Error PDFs in the Hessian Approach. Part II. https://doi.org/10.1103/physrevd.100.114024

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