Extraction of spin-dependent parton densities and their uncertainties

By D. Florian, R. Sassot, M. Stratmann, W. Vogelsang. 2009

310 citations recorded by the source corpus.

We discuss techniques and results for the extraction of the nucleon's spin-dependent parton distributions and their uncertainties from data for polarized deep-inelastic lepton-nucleon and proton-proton scattering by means of a global QCD analysis. Computational methods are described that significantly increase the speed of the required calculations to a level that allows one to perform the full analysis consistently at next-to-leading order accuracy. We examine how the various data sets help to constrain different aspects of the quark, antiquark, and gluon helicity distributions. Uncertainty estimates are performed using both the Lagrange multiplier and the Hessian approaches. We use the extracted parton distribution functions and their estimated uncertainties to predict spin asymmetries for high-transverse momentum pion and jet production in polarized proton-proton collisions at 500 GeV center-of-mass system energy at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory, as well as for W boson production.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/cc3a0340879216c9078ce838218ea3a2eb1fe537

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In Nuclear and High Energy Physics

Citations in the corpus

A complete non-perturbative renormalization prescription for quasi-PDFs (2017, methodology): “For purely orientational purposes, we also plot phenomenological PDFs (DSSV08 [51] and JAM15 [52]).”
A Guide to Light-Cone PDFs from Lattice QCD: An Overview of Approaches, Techniques, and Results (2018, methodology): “The results from the phenomenological analysis of ABMP16 [222] (NNLO), NNPDF [215] (NNLO), CJ15 [212] (NLO), DSSV08 [110], NNPDF1.”
Parton distributions and lattice-QCD calculations: Toward 3D structure (2020, methodology): “The MSTW08 (Martin et al., 2009) and DSSV08 (de Florian et al., 2009) parton sets were used as input for the unpolarized (at LO) and the helicity (at NLO) PDFs entering Eq.”
The Structure of the Proton in the LHC Precision Era (2017, background): “These include, among others, the determination of its spin structure by means of the polarized PDFs [66, 67], the nuclear modifications of the free–proton PDFs [68, 69], relevant for the understanding of cold nuclear matter effects at the RHIC and LHC heavy–ion program, and the three–dimensional ima”
Flavor structure of the nucleon sea from lattice QCD (2014, background): “[9] Daniel de Florian, Rodolfo Sassot, Marco Stratmann, and Werner Vogelsang.”