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 $pp$ collisions up to LHC energies, using recent data and also for forthcoming experimental results.

4 pages, 3 figures, Invited talk at Diffraction 2016, Acireale, Sicily (Italy), Sept. 2 - 8 (2016), to be published in the AIP Conference Proceedings. arXiv admin note: substantial text overlap with arXiv:1510.06189

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