Speaker
Dr
Roger Horsley
(University of Edinburgh)
Description
The proton consists of two valence up quarks, one
down quark together with a `sea' of quark anti-quark pairs
and gluons. How each constituent contributes to the
total spin of the proton has remained a mystery for many
years. In particular the quark contribution is much
smaller than expected. We discuss here our lattice QCD
determination of the quark contribution, using a novel
technique, based on a field theoretic application
of the Feynman-Hellmann theorem.
Authors
Dr
Paul Rakow
(University of Liverpool)
Dr
Roger Horsley
(University of Edinburgh)
