Gold-plated moments of nucleon structure functions in baryon chiral perturbation theory

Abstract

We obtain leading- and next-to-leading order predictions of chiral perturbation theory for several prominent moments of nucleon structure functions. These free-parameter free results turn out to be in overall agreement with the available empirical information on nearly all of the considered moments, in the region of low-momentum transfer ($Q^2<0.3$ GeV${}^2$). Especially surprising is the situation for the spin polarizability ${\delta }_{LT}$, which thus far was not reproducible in chiral perturbation theory for proton and neutron simultaneously. This problem, known as the "${\delta }_{LT}$ puzzle," is not seen in the present calculation.

10 pages, 6 figs; references and figures updated, published version (title changed in journal)

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Cited by in corpus (15)

• Determination of the Proton Spin Structure Functions for 0.05 < Q^2 < 5 GeV^2 using CLAS
• Gold-plated moments of nucleon structure functions in baryon chiral perturbation theory
• Measurement of the Bjorken Sum at very low $Q^2$
• Nucleon form factors in dispersively improved Chiral Effective Field Theory I: Scalar form factor
• Measurement of the proton spin structure at long distances
• Generalized polarizabilities of the nucleon in baryon chiral perturbation theory
• Measurement of the generalized spin polarizabilities of the neutron in the low $Q^2$ region
• Systematic study of octet-baryon electromagnetic form factors in covariant chiral perturbation theory
• Forward doubly-virtual Compton scattering off the nucleon in chiral perturbation theory: the subtraction function and moments of unpolarized structure functions
• Nucleon polarizabilities in covariant baryon chiral perturbation theory with explicit $\Delta$ degrees of freedom
• The g2p Experiment: A Measurement of the Proton's Spin Structure Functions
• Investigations on the flavor-dependent axial charges of the octet baryons
• Measurement of the nucleon spin structure functions for 0.01<$Q^2$<1 GeV${}^2$ using CLAS
• The quark orbital angular momentum of ground state octet baryons
• Experimental studies at low $Q^2$ of the spin structure of the nucleon at Jefferson Lab