arXiv:1908.11238·v1·High Energy Physics — Phenomenology
New CTEQ Global Analysis with High Precision Data from the LHC
Tie-Jiun Hou🇨🇳 · Keping Xie🇨🇳 · Jun Gao🇨🇳 · Sayipjamal Dulat🇨🇳 · Marco Guzzi🇨🇳 · T. J. Hobbs🇺🇸 · Joey Huston🇺🇸 · Pavel Nadolsky🇺🇸 · Jon Pumplin🇺🇸 · Carl Schmidt🇺🇸 · Ibrahim Sitiwaldi🇨🇳 · Dan Stump🇺🇸 · C.-P. Yuan🇺🇸
Abstract
We present the new CTEQ-TEA global analysis of quantum chromodynamics (QCD). In this analysis, parton distribution functions (PDFs) of the nucleon are determined within the Hessian method at the next-to-next-to leading order (NNLO) in perturbative QCD, based on the most recent measurements from the Large Hadron Collider (LHC) and a variety of world collider data. Because of difficulties in fitting both the ATLAS 7 and 8 TeV and vector boson production cross section data, we present two families of PDFs, named CT18 and CT18 PDFs, respectively, without and with the ATLAS 7 TeV and measurements. We study the impact of the CT18 family of PDFs on the theoretical predictions of standard candle cross sections at the LHC.
Comments: 5 pages, 6 figures