Parton Distribution Benchmarking with LHC Data
Abstract
We present a detailed comparison of the most recent sets of NNLO PDFs from the ABM, CT, HERAPDF, MSTW and NNPDF collaborations. We compare parton distributions at low and high scales and parton luminosities relevant for LHC phenomenology. We study the PDF dependence of LHC benchmark inclusive cross sections and differential distributions for electroweak boson and jet production in the cases in which the experimental covariance matrix is available. We quantify the agreement between data and theory by computing the chi2 for each data set with all the various PDFs. PDF comparisons are performed consistently for common values of the strong coupling. We also present a benchmark comparison of jet production at the LHC, comparing the results from various available codes and scale settings. Finally, we discuss the implications of the updated NNLO PDF sets for the combined PDF+alphaS uncertainty in the gluon fusion Higgs production cross section.
Cite
@article{arxiv.1211.5142,
title = {Parton Distribution Benchmarking with LHC Data},
author = {Richard D. Ball and Stefano Carrazza and Luigi Del Debbio and Stefano Forte and Jun Gao and Nathan Hartland and Joey Huston and Pavel Nadolsky and Juan Rojo and Daniel Stump and Robert S. Thorne and C. -P. Yuan},
journal= {arXiv preprint arXiv:1211.5142},
year = {2015}
}
Comments
52 pages, 22 figures, accepted for publication in JHEP