15th International Workshop on the Physics of Excited Nucleons

Toward the determination of the gluon helicity distribution in the nucleon from lattice quantum chromodynamics

Not scheduled

20m

Speaker

David Richards (Jefferson Lab)

Description

I describe recent progress by the HadStruc Collaboratio to describe the contribution of gluons to the spin structure of the nucleon. I begin by introducing the Pseudo-PDF/short-distance-factorization framework that underlies our programme, before proceeding to describe the calculation of the isovector and gluon unpolarized distributions. I then present our calculation of the x-dependent gluon helicity distribution, and the comparison with experimental determinations. I conclude with recent work on the gluon momentum fraction that provides a normalization of the gluon Parton Distribution Functions, and of the contribution of the sea quarks.