Hauptseite > Publikationsdatenbank > Moments of nucleon unpolarized, polarized, and transversity parton distribution functions from lattice QCD at the physical point > print

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024 7 _ |a 10.1103/PhysRevD.109.074508
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100 1 _ |a Rodekamp, Marcel
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245 _ _ |a Moments of nucleon unpolarized, polarized, and transversity parton distribution functions from lattice QCD at the physical point
260 _ _ |a Ridge, NY
|c 2024
|b American Physical Society
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520 _ _ |a The second Mellin moments ⟨x⟩ of the nucleon’s unpolarized, polarized, and transversity parton distribution functions are computed. Two lattice QCD ensembles at the physical pion mass are used: these were generated using a tree-level Symanzik-improved gauge action and 2+1 flavor tree-level improved Wilson Clover fermions coupling via 2-level HEX-smearing. The moments are extracted from forward matrix elements of local leading twist operators. We determine renomalization factors in RI-(S)MOM and match to $\overline{MS}$ at scale 2 GeV. Our findings show that operators that exhibit vanishing kinematics at zero momentum can have significantly reduced excited-state contamination. The resulting polarized moment is used to quantify the longitudinal contribution to the quark spin-orbit correlation. All our results agree within two sigma with previous lattice results.
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700 1 _ |a Engelhardt, Michael
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700 1 _ |a Green, Jeremy R.
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700 1 _ |a Krieg, Stefan
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700 1 _ |a Liuti, Simonetta
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700 1 _ |a Meinel, Stefan
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700 1 _ |a Negele, John W.
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700 1 _ |a Pochinsky, Andrew
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700 1 _ |a Syritsyn, Sergey
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773 _ _ |a 10.1103/PhysRevD.109.074508
|g Vol. 109, no. 7, p. 074508
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