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A first unbiased global determination of polarized PDFs and their uncertainties

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  • NNPDF Collaboration

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Original languageEnglish
Pages (from-to)276–308
Number of pages33
JournalNuclear physics b
Early online date22 Aug 2014
Publication statusPublished - 1 Oct 2014


We present a first global determination of spin-dependent parton distribution functions (PDFs) and their uncertainties using the NNPDF methodology: NNPDFpol1.1. Longitudinally polarized deep-inelastic scattering data, already used for the previous NNPDFpol1.0 PDF set, are supplemented with the most recent polarized hadron collider data for inclusive jet and W boson production from the STAR and PHENIX experiments at RHIC, and with open-charm production data from the COMPASS experiment, thereby allowing for a separate determination of the polarized quark and antiquark PDFs, and an improved determination of the medium- and large-x polarized gluon PDF. We study the phenomenological implications of the NNPDFpol1.1 set, and we provide predictions for the longitudinal double-spin asymmetry for semi-inclusive pion production at RHIC.

    Research areas

  • hep-ph, hep-ex

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