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Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.094017
Abstract: The nucleon spin-averaged forward virtual Compton tensor determines important physical quantities such as electromagnetically-induced mass differences of nucleons, and two-photon exchange contributions in hydrogen spectroscopy. It depends on two kinematic variables: $$\nu$$, the virtual photon…
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Keywords:
tensor;
nucleon spin;
averaged forward;
spin ... See more keywords
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Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.038503
Abstract: In recent work, Hill and Paz apply the operator product expansion to forward doubly virtual Compton scattering. The resulting large-$Q^2$ form of the amplitude $W_1(0,Q^2)$ is compatible with the one we obtain by extrapolation of…
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Keywords:
virtual compton;
comment nucleon;
nucleon spin;
averaged forward ... See more keywords
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Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.142002
Abstract: We determine within lattice QCD the nucleon spin carried by valence and sea quarks and gluons. The calculation is performed using an ensemble of gauge configurations with two degenerate light quarks with mass fixed to…
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Keywords:
stat syst;
syst;
spin momentum;
nucleon spin ... See more keywords