NNLO constraints on proton PDFs from the SeaQuest and STAR experiments and other developments in the CTEQ-TEA global analysis

We review progress in the global QCD analysis by the CTEQ-TEA group since the publication of CT18 parton distribution functions (PDFs) in the proton. Specifically, we discuss comparisons of CT18 NNLO predictions with the LHC 13 TeV measurements as well as with the FNAL SeaQuest and BNL STAR data on...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2022-02
Main Authors: Guzzi, Marco, Hobbs, T J, Hou, Tie-Jiun, Xiaoxian Jing, Xie, Keping, Courtoy, Aurore, Dulat, Sayipjamal, Gao, Jun, Huston, Joey, Nadolsky, Pavel M, Schmidt, Carl, Ibrahim Sitiwaldi, Yan, Mengshi, C -P Yuan
Format: Article
Language:English
Subjects:
Deuterons
Distribution functions
Impact analysis
Large Hadron Collider
Leptons
Pair production
Partons
Protons
Quantum chromodynamics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We review progress in the global QCD analysis by the CTEQ-TEA group since the publication of CT18 parton distribution functions (PDFs) in the proton. Specifically, we discuss comparisons of CT18 NNLO predictions with the LHC 13 TeV measurements as well as with the FNAL SeaQuest and BNL STAR data on lepton pair production. The specialized CT18X PDFs approximating saturation effects are compared with the CT18sx PDFs obtained using NLL/NLO small-\(x\) resummation. Short summaries are presented for the special CT18 parton distributions with fitted charm and with lattice QCD inputs. A recent comparative analysis of the impact of deuteron nuclear effects on the parton distributions by the CTEQ-JLab and CTEQ-TEA groups is summarized.
ISSN:2331-8422