fastNLO tables for NNLO top-quark pair differential distributions

TL;DR

This paper introduces the first publicly available fastNLO tables with NNLO QCD accuracy for top-quark pair differential distributions, enabling rapid calculations for various PDFs and alpha_s values, crucial for precision physics at the LHC.

Contribution

It provides the first set of NNLO accurate fastNLO tables for top-quark pair distributions, enhancing computational efficiency in PDF fits and collider analyses.

Findings

High numerical accuracy comparable to existing NNLO calculations

Enables fast computation of distributions with any PDF set

Supports various collider energies for ongoing and future measurements

Abstract

We release fastNLO tables with NNLO QCD top-quark pair differential distributions corresponding to 8 TeV ATLAS [Eur. Phys. J. C 76 538 (2016)] and CMS [Eur. Phys. J. C 75 542 (2015)] measurements. This is the first time fastNLO tables with NNLO QCD accuracy have been made publicly available. The tables are indispensable in pdf fits and allow, for the first time, very fast calculation of differential distributions with any pdf set and for different values of $\alpha_s$. The numerical accuracy of the resulting differential distributions is high and comparable to the accuracy of all publicly available NNLO top-quark differential calculations. We intend to keep producing tables corresponding to existing and future LHC measurements at various collider energies.