A first unbiased global NLO determination of parton distributions and their uncertainties
By R. Ball, Luigi Del Debbio, S. Forte, Alberto Guffanti, José I. Latorre, Juan Rojo, M. Ubiali. 2010
462 citations recorded by the source corpus.
We present a determination of the parton distributions of the nucleon from a global set of hard scattering data using the NNPDF methodology: NNPDF2.0. Experimental data include deep-inelastic scattering with the combined HERA-I dataset, fixed target Drell-Yan production, collider weak boson production and inclusive jet production. Next-to-leading order QCD is used throughout without resorting to K-factors. We present and utilize an improved fast algorithm for the solution of evolution equations and the computation of general hadronic processes. We introduce improved techniques for the training of the neural networks which are used as parton parametrization, and we use a novel approach for the proper treatment of normalization uncertainties. We assess quantitatively the impact of individual datasets on PDFs. We find very good consistency of all datasets with each other and with NLO QCD, with no evidence of tension between datasets. Some PDF combinations relevant for LHC observables turn out to be determined rather more accurately than in any other parton fit. (C) 2010 Elsevier B.V. All rights reserved.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ba424c73f5837c03d66c0c790b091a26873d5480
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In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- Juan Rojo
- M. Schönherr
- Stefan Dittmaier
- Ansgar Denner
- Fabio Maltoni
Citations in the corpus
- Parton distribution benchmarking with LHC data (2012, methodology): “0 [79], the Tevatron jet data is included in NNPDF with the FastNLO package.”
- A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector (2012, result): “0 analysis [284] was repeated for different choices of the kinematic cuts, one for each choice of Acut, and the results were compared with experimental data.”
- Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, background): “0 fit as a scatter plot in the (x,Q2) kinematic plane, at the point corresponding to each observable using leading order kinematics [215], both for all observables, and for the 10% of observables exhibiting the largest relative differences.”
- The Structure of the Proton in the LHC Precision Era (2017, methodology): “0 fit was reported in [132], at NLO and to a range of DIS and fixed target data.”