arXiv:2408.04020·v2·High Energy Physics — Phenomenology
New results in the CTEQ-TEA global analysis of parton distributions in the nucleon
A. Ablat🇨🇳 · A. Courtoy🇲🇽 · S. Dulat🇨🇳 · M. Guzzi🇺🇸 · T.J. Hobbs🇺🇸 · T.-J. Hou🇨🇳 · J. Huston🇺🇸 · K. Mohan🇺🇸 · H.-W. Lin🇺🇸 · P. Nadolsky🇺🇸 · I. Sitiwaldi🇨🇳 · K. Xie🇺🇸 · M. Yan🇨🇳 · C.-P. Yuan🇺🇸
Abstract
This report summarizes the latest developments in the CTEQ-TEA global analysis of parton distribution functions (PDFs) in the nucleon. The focus is on recent NNLO fits to high-precision LHC data at 8 and 13 TeV, including Drell-Yan, jet, and top-quark pair production, pursued on the way toward the release of the new generation of CTEQ-TEA general-purpose PDFs. The report also discusses advancements in statistical and numerical methods for PDF determination and uncertainty quantification, highlighting the importance of robust and replicable uncertainties for high-stakes observables. Additionally, it covers phenomenological studies related to PDF determination, such as the interplay of experimental constraints, exploration of correlations between high- nucleon sea and low-energy parity-violating measurements, fitted charm in the nucleon, the photon PDF in the neutron, and simultaneous SMEFT-PDF analyses.
Comments: 59 pages, 19 figures, published version