Apr 8 – 12, 2024
Maison MINATEC, Grenoble, FRANCE
Europe/Paris timezone

New Neutron Structure Function Extraction from Global Inclusive Proton and Deuteron Data

Apr 9, 2024, 12:20 PM
Maison MINATEC, Grenoble, FRANCE

Maison MINATEC, Grenoble, FRANCE

3 Parv. Louis Néel, 38054 Grenoble
Regular parallel talk WG1: Structure Functions and Parton Densities WG1


Cynthia Keppel (Thomas Jefferson National Accelerator Facility) Shujie Li


The available world deep-inelastic scattering data on the proton and deuteron structure functions F2p and F2d, and the ratio F2p/F2d, were leveraged to extract the free neutron structure function, F2n, and associated uncertainties using the latest nuclear effects calculations with the deuteron data. Special attention was devoted to the normalization of the proton and deuteron experimental datasets and to the treatment of correlated systematic errors, as well as the quantification of procedural and theoretical uncertainties. The extracted F2n dataset is utilized to evaluate the Q2 dependence of the Gottfried Sum Rule and the nonsinglet F2p-F2n moments. To facilitate replication of this study, as well as for general applications, a comprehensive database including all recent JLab measurements, the extracted F2n, a modified CTEQ-JLab global PDF fit named CJ15nlo mod, and grids with calculated proton, neutron and deuteron structure functions at next-to-leading order, have been made publicly available. A summary overview of this work will be presented.

Primary author


Cynthia Keppel (Thomas Jefferson National Accelerator Facility)

Presentation materials