New CTEQ global analysis with high precision data from the LHC

Apr 9, 2019, 9:10 AM
20m
Rettorato - Aula Magna

Rettorato - Aula Magna

Via Verdi, 8 Turin
Parallel Session Talk WG1: Structure Functions and Parton Densities WG1:Structure Functions and Parton Densities

Speaker

C.-P. Yuan (Michigan State University)

Description

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 experimental collider data. Next-to-leading order (NLO) and leading order (LO) PDFs are also determined. 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 and the role of PDF uncertainties.

Primary authors

Tie-Jiun Hou (Northeastern University, China) Sayipjamal Dulat (Xinjiang University, China) Joey Huston (Michigan State University) Jun Gao (Shanghai Jiao Tong University) Marco Guzzi (Kennesaw State University) Tim Hobbs (Southern Methodist University) Pavel Nadolsky (Southern Methodist University) Jon Pumplin (Michigan State University) Carl Schmidt (Michigan State University) Ibrahim Sitiwaldi (Xinjiang University, China) Dan Stump (Michigan State University) Keping Xie (Southern Methodist University) C.-P. Yuan (Michigan State University)

Presentation materials