New Statistical PDFs: Predictions and Tests up to LHC Energies

Abstract : The quantum statistical parton distributions approach proposed more than one decade ago is revisited by considering a larger set of recent and accurate Deep Inelastic Scattering experimental results. It enables us to improve the description of the data by means of a new determination of the parton distributions. This global next-to-leading order QCD analysis leads to a good description of several structure functions, involving unpolarized parton distributions and helicity distributions, in a broad range of $x$ and $Q^2$ and in terms of a rather small number of free parameters. There are several challenging issues, in particular the behavior of $\bar d(x) / \bar u(x)$ at large $x$, a possible large positive gluon helicity distribution, etc.. The predictions of this theoretical approach will be tested for single-jet production and charge asymmetry in $W^{\pm}$ production in $\bar p p$ and $p p$ collisions up to LHC energies, using recent data and also for forthcoming experimental results.
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Jacques Soffer, Claude Bourrely. New Statistical PDFs: Predictions and Tests up to LHC Energies. 9th International Workshop on Diffraction in High Energy Physics, Sep 2016, Santa Tecla di Acireale, Italy. pp.050003, ⟨10.1063/1.4977155⟩. ⟨hal-01555106⟩



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