出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present preliminary numerical studies in Lattice QCD related to the intrinsic transverse momentum
distribution of partons in the nucleon. We employ non-local operators, consisting of
spatially separated quark creation and annihilation operators connected by a straight Wilson line.
A clear signal is already obtained from a small number of configurations at a pion mass mp ≈ 600
MeV. As an example, we demonstrate that we can obtain the first x-moment of the transverse
momentum dependent parton distribution function f n=1
1 (~kT ) from our data. Our results, which
are not renormalized, show a Gaussian-like distribution. The root mean squared transverse momentum
is
q
h~k2T
i ≈ 560MeV for a Gaussian fit, close to phenomenological values.
