Orateur
Dr
Martha Constantinou
(University of Cyprus)
Description
We present results on the nucleon electromagnetic/axial form factors,
as well as the lower moments of the nucleon generalized parton
distributions, within lattice QCD using two dynamical flavors
of degenerate twisted mass fermions. Our simulations are performed on lattices with three different values of the lattice spacings, namely
a=0.089 fm, a=0.070 fm and a=0.056 fm, allowing the
investigation of cut-off effects. The volume dependence is examined
using simulations on two lattices of spatial length L=2.1 fm and
L=2.8 fm. The simulations span pion masses in the range of 260-470
MeV. Our results are renormalized non-perturbatively and the values
are given in the MS-scheme at a scale mu=2 GeV.
The nucleon axial charge, magnetic moment, Dirac and Pauli radii are
obtained in the continuum limit and chirally extrapolated to the
physical pion mass allowing for a comparison with experiment.
The consequences of our results on the spin carried by the quarks in
the nucleon are also investigated.
Auteur principal
Dr
Martha Constantinou
(University of Cyprus)
Co-auteurs
Prof.
Constantia Alexandrou
(University of Cyprus)
Prof.
Jaume Carbonell
(Laboratoire de Physique Subatomique et Cosmologie, UJF/CNRS/IN2P3)
Prof.
Karl Jansen
(NIC, DESY)
Dr
Mariane Brinet
(Laboratoire de Physique Subatomique et Cosmologie, UJF/CNRS/IN2P3)
Dr
Mauro Papinutto
(Laboratoire de Physique Subatomique et Cosmologie, UJF/CNRS/IN2P3)
Dr
Pierre Antoine Harraud
(Laboratoire de Physique Subatomique et Cosmologie, UJF/CNRS/IN2P3)
Prof.
Pierre Guichon
(CEA-Saclay, IRFU/Service de Physique Nucl ́eaire)
Dr
Tomasz Korzec
(Institut fur Physik Humboldt Universitat zu Berlin)
