ABM11 parton distributions and benchmarks

TL;DR

This paper determines nucleon parton distribution functions and the strong coupling constant at NNLO using global data, providing benchmark cross sections for collider physics.

Contribution

It offers a comprehensive NNLO analysis of PDFs and $\alpha_s$ based on extensive data, with comparisons and collider cross section predictions.

Findings

Consistent NNLO PDFs with world data

Precise $\alpha_s$ determination at NNLO

Benchmark cross sections for collider processes

Abstract

We present a determination of the nucleon parton distribution functions (PDFs) and of the strong coupling constant $\alpha_s$ at next-to-next-to-leading order (NNLO) in QCD based on the world data for deep-inelastic scattering and the fixed-target data for the Drell-Yan process. The analysis is performed in the fixed-flavor number scheme for $n_f=3,4,5$ and uses the $\bar{MS}$ scheme for $\alpha_s$ and the heavy quark masses. The fit results are compared with other PDFs and used to compute the benchmark cross sections at hadron colliders to the NNLO accuracy.