New CTEQ Global Analysis with High Precision Data from the LHC

Understand

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 $W$ and $Z$ vector boson production cross section data, we present two families of PDFs, named CT18 and CT18$Z$ PDFs, respectively, without and with the ATLAS 7 TeV $W$ and $Z$ measurements.
• We study the impact of the CT18 family of PDFs on the theoretical predictions of standard candle cross sections at the LHC.