New developments in the statistical approach of parton distributions: tests and predictions up to LHC energies

par Jacques Soffer (Temple University, Philadelphia, USA)

jeudi 23 juin 2016, 14:00 → 15:00 Europe/Paris

Amphithéâtre (CPPM)

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 Q² and in terms of a rather small number of free parameters. There are several challenging issues,in particular the behavior of dbar/ubar 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^+/- production in ppbar and pp collisions up to LHC energies, using recent data and also for forthcoming experimental results.