On the asymptotic behaviour of parton distribution functions at small and large x

Apr 13, 2016, 6:10 PM
15m
Auditorium (DESY Hamburg)

Auditorium

DESY Hamburg

Structure Functions and Parton Densities WG1 Structure Functions and Parton Densities

Speaker

Dr Emanuele Roberto Nocera (Rudolf Peierls Centre for Theoretical Physics University of Oxford)

Description

The behaviour of parton distribution functions (PDFs) at sufficiently small and large values of momentum fractions is expected to be governed by a power law, as a result of Regge theory and spectator counting rules respectively. I investigate in which regions of momentum fraction and energy such an asymptotic behaviour emerges, based on recent determinations of PDFs from a global analysis of experimental data. I discuss how these compare with theoretical expectations provided by perturbative and non-perturbative quantum chromodynamics (QCD) and models of nucleon structure, I examine how much the latter can be discriminated by the data, and I comment on how these are related to our first-principle understanding of QCD.

Primary author

Dr Emanuele Roberto Nocera (Rudolf Peierls Centre for Theoretical Physics University of Oxford)

Presentation materials