Moments of generalized parton distribution functions and the nucleon spin contents

Abstract

It is shown that, based only on two empirically known facts besides two reasonable theoretical postulates, we are inevitably led to a conclusion that the quark orbital angular momentum carries nearly half of the total nucleon spin. We also perform a model analysis to find that the quark spin fraction $\Delta \Sigma$ is extremely sensitive to the pion mass, which may resolve the discrepancy between the observation and the prediction of the recent lattice QCD simulation carried out in the heavy pion region.

LaTeX, 8 pages, 1 figure

References in corpus (4)

• Moments of Nucleon Generalized Parton Distributions in Lattice QCD
• Insight into nucleon structure from lattice calculations of moments of parton and generalized parton distributions
• Dynamically Spontaneous Symmetry Breaking and Masses of Lightest Nonet Scalar Mesons as Composite Higgs Bosons
• Chiral extrapolation and physical insights

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• Electric properties of the baryon anti-decuplet in the SU(3) chiral quark-soliton model