We present a calculation of the Mellin moments of the nucleon transverse quark spin densities extracted from the unpolarized and transversity generalized form factors. We use three NF=2+1+1 ensembles of twisted mass fermions with quark masses tuned to their physical values and lattice spacings a∼0.08~fm, a∼0.07~fm and a∼0.06~fm and extrapolate the form factors to the continuum limit. Besides isovector densities we also include results for the tensor charge for each quark flavor using the ensemble with a∼0.08~fm for which we include the disconnected contributions.
@article{arxiv.2210.05743,
title = {Nucleon transverse quark spin densities},
author = {Constantia Alexandrou and Simone Bacchio and Martha Constantinou and Petros Dimopoulos and Jacob Finkenrath and Roberto Frezzotti and Kyriakos Hadjiyiannakou and Karl Jansen and Bartosz Kostrzewa and Giannis Koutsou and Gregoris Spanoudes and Carsten Urbach},
journal= {arXiv preprint arXiv:2210.05743},
year = {2022}
}
Comments
9 pages, 6 figures, talk presented at the 39th International Symposium on Lattice Field Theory, LATTICE2022 8th-13th August, 2022, University of Bonn, Germany