Update of the NNLO PDFs in the 3-, 4-, and 5-flavour scheme

TL;DR

This paper updates the NNLO parton distribution functions using combined HERA data and partial NNLO corrections, providing refined PDFs and cross-section estimates for collider experiments.

Contribution

It presents an updated set of NNLO PDFs incorporating new data and corrections, improving accuracy for collider predictions.

Findings

Updated NNLO PDFs with combined HERA data

Estimated strong coupling constant $eta^{ m NNLO}_{ m s}(M_{ m Z})=0.1147(12)$

Provided cross-section predictions for Tevatron and LHC

Abstract

We report on an update of the next-to-next-to-leading order (NNLO) ABKM09 parton distributions functions. They are obtained with the use of the combined HERA collider Run I inclusive deep-inelastic scattering (DIS) data and the partial NNLO corrections to the heavy quark electro-production taken into account. The value of the strong couplig constant $\alpha^{\rm NNLO}_{\rm s}(M_{\rm Z})=0.1147(12)$ is obtained. The standard candle cross sections for the Tevatron collider and the LHC estimated with the updated PDFs are provided.