New Features in Version 2 of the FastNLO Project

Britzger, Daniel

doi:10.3204/DESY-PROC-2012-02/165

Contribution to a conference proceedings/Internal Report

DESY-2013-01024

New Features in Version 2 of the FastNLO Project

Britzger, D. (Corresponding author)DESY*

2013
Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-67-6

Proceedings of the XXth International Workshop on Deep-Inelastic Scattering and Related Topics DIS 2012
20th International Workshop on Deep-Inelastic Scattering and Related Topics, DIS 2012, Bonn, Germany, 26 Mar 2013 - 30 Mar 2013 Hamburg : Deutsches Elektronen-Synchrotron : 1st Ed., 217-221 (2013) [10.3204/DESY-PROC-2012-02/165]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2012-02/165

Report No.: DESY-PROC-2012-02

Abstract: Standard methods for higher-order calculations of QCD cross sections in hadron-induced collisions are time-consuming. The fastNLO project uses multi-dimensional interpolationtechniques to convert the convolutions of perturbative coefficients with parton distribution functions and the strong coupling into simple products. By integrating the perturbativecoefficients for a given observable with interpolation kernels, fastNLO can store the results of the time-consuming folding integrals in tables, which subsequently are used for very fast rederivations of the same observable for arbitrary parton distribution functions, different scale choices, or $\alpha _{s}$ (M_{Z})$. Various tables with code for their evaluation are available for numerous jet measurements at the LHC, the TeVatron, and HERA. FastNLO is used in publications of experimental results by the ATLAS, CMS, CDF, DØ, and H1 collaborations, and in all recent global PDF analyses by MSTW, CTEQ, and NNPDF. This article focuses on developments implemented in the new version 2 of fastNLO, enhancing andbroadening its functionality.

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