出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Moments of generalised parton distributions can be related to off-forward matrix elements of local
operators. We calculate a few of the leading twist matrix elements for the pion on the lattice. The
simulations are performed using two avours of dynamical fermions and a range of pion masses
from 550 to 1090 MeV. Our lattice spacings and spatial volumes lie in the range 0.07.0.12 fm
and (1.6.2.2 fm)3, respectively. Key features of our investigation are the use of O(a) improved
Wilson fermions and non-perturbative renormalisation.
We present rst results for the two lowest moments of the generalised parton distributions of the
pion and compare the pion electromagnetic form factor Fp to experimental data. Good agreement
is found between lattice data and experiment.
