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Nucleon transverse quark spin densities
Alexandrou, Constantia Bacchio, Simone Dimopoulos, Petros Finkenrath, Jacob Frezzotti, Roberto Hadjiyiannakou, Kyriakos Jansen, Karl Kostrzewa, Bartosz Koutsou, Giannis
Alexandrou, Constantia
Bacchio, Simone
Dimopoulos, Petros
Finkenrath, Jacob
Frezzotti, Roberto
Hadjiyiannakou, Kyriakos
Jansen, Karl
Kostrzewa, Bartosz
Koutsou, Giannis
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Conference proceeding
Date
2023-04-06
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Physics
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https://doi.org/10.22323/1.430.0092
Abstract
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.
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Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022), Vol. 430
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