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

Conference · Sat Aug 14 04:00:00 EDT 2021 · TBD

OSTI ID:1824307

Guzzi, Marco ^[1]; Hobbs, T. J. ^[2]; Hou, Tie-Jiun ^[3]; Jing, Xiaoxian ^[4]; Xie, Keping ^[5]; Courtoy, Aurore ^[6]; Dulat, Sayipjamal ^[7]; Gao, Jun ^[8]; Huston, Joey ^[9]; Nadolsky, Pavel M. ^[4]; Schmidt, Carl ^[9]; Sitiwaldi, Ibrahim ^[7]; Yan, Mengshi ^[10]; Yuan, C.-P. ^[9]

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1. Kennesaw State U.
2. Fermilab; IIT, Chicago
3. Shenyang, Northeast U. Tech.
4. Southern Methodist U.
5. Pittsburgh U.
6. Mexico U.
7. Xinjiang U.
8. Shanghai Jiao Tong U.
9. Michigan State U.
10. Peking U.

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.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1824307
• Report Number(s): FERMILAB-CONF-21-361-QIS-SCD-T; MSUHEP-21-023; PITT-PACC-2117; SMU-HEP-21-09; arXiv:2108.06596; oai:inspirehep.net:1905705
• Conference Information: Journal Name: TBD
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS