Parton distribution benchmarking with LHC data

By R. Ball, Stefano Carrazza, Luigi Del Debbio, S. Forte, Jun Gao, Nathan Hartland, J. Huston, Pavel M. Nadolsky, Juan Rojo, D. Stump and 2 more. 2012

134 citations recorded by the source corpus.

A bstractWe 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 χ2 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+αs uncertainty in the gluon fusion Higgs production cross section.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/cf5174bd7bfb2abb8ab6f87581e96bd1bba3d3da

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Citations in the corpus

String formation beyond leading colour (2015, background): “For the calculation of inclusive hard-scattering cross sections, factorisation allows most of the complicated long-distance physics to be represented in the form of universal parton distribution functions (PDFs) [4], while the short-distance parts can be calculated perturbatively.”
The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II (2015, methodology): “We set the factorization and renormalization scales equal to pT of the jet in each experimental bin, which minimizes both the residual scale dependence at NLO [4, 225] and the NNLO/NLO correction [94] in the partial NNLO calculation in the gg sub-channel [95, 119].”
Higgs boson self-coupling measurements using ratios of cross sections (2013, unknown): “[35, 67].”