HAL : in2p3-00585182, version 1
 arXiv : 1104.1600
 Physical Review D 83 (2011) 114513
 Moments of nucleon generalized parton distributions from lattice QCD
 (2011)
 We present results on the lower moments of the nucleon generalized parton distri butions 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 $\bar{\rm MS}$ scheme at a scale $\mu=2$ GeV. They are chirally extrapolated to the physical point in order to compare with experiment. The consequences of these results on the spin carried by the quarks in the nucleon are investigated.
 Thème(s) : Physique/Physique des Hautes Energies - RéseauPhysique/Physique des Hautes Energies - PhénoménologiePhysique/Physique Nucléaire Théorique
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1104.1600
 in2p3-00585182, version 1 http://hal.in2p3.fr/in2p3-00585182 oai:hal.in2p3.fr:in2p3-00585182 Contributeur : Emmanuelle Vernay <> Soumis le : Mardi 12 Avril 2011, 08:36:33 Dernière modification le : Mercredi 22 Juin 2011, 08:36:14