Speaker
Timothy Hobbs
(Southern Methodist University and EIC Center@JLab)
Description
The final CT18 global analysis released at the end of 2019 is based on the most complete combination of LHC and non-LHC experimental measurements to date. We discuss implications of this expansive data set for the understanding of the unpolarized PDFs and introduce several alternative fits to explore a number of critical features: the PDF pulls of the high-precision ATLAS 7 TeV W/Z data (CT18A); the effects of altering the QCD scale choices for the low-x HERA DIS data (CT18X); and the sum of these changes, including variations of the charm mass (CT18Z). We also examine theoretical predictions based upon CT18 at NNLO and NLO for several standard candle LHC cross sections, parton-parton luminosities, and PDF Mellin moments.
Primary authors
Timothy Hobbs
(Southern Methodist University and EIC Center@JLab)
Dr
Tie-Jiun Hou
(Shenyang, Northeast U. Tech.)
Dr
Jun Gao
(Shanghai, Jiao Tong U. & Peking U., CHEP)
Dr
Keping Xie
(U. Pittsburgh (main) & Southern Methodist U.)
Prof.
Sayipjamal Dulat
(Xinjiang U.)
Prof.
Marco Guzzi
(Kennesaw State U.)
Prof.
Joey Huston
(Michigan State U.)
Prof.
Pavel Nadolsky
(Southern Methodist U.)
Prof.
Jon Pumplin
(Michigan State U.)
Prof.
Carl Schmidt
(Michigan State U.)
Ibrahim Sitiwaldi
(Xinjiang U.)
Prof.
Daniel Stump
(Michigan State U.)
Prof.
C.-P. Yuan
(Michigan State U.)
