Spin structure of the nucleon at low energies

Details Spin structure of the nucleon at low energies Spin structure of the nucleon at low energies

2002-12-03

arxiv.org/abs/hep-ph/0212033v1

Phys.Rev. D67 (2003) 076008

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pp, 14 figs

Scientific paper

10.1103/PhysRevD.67.076008

The spin structure of the nucleon is analyzed in the framework of a Lorentz-invariant formulation of baryon chiral perturbation theory. The structure functions of doubly virtual Compton scattering are calculated to one-loop accuracy (fourth order in the chiral expansion). We discuss the generalization of the Gerasimov-Drell-Hearn sum rule, the Burkhardt-Cottingham sum rule and moments of these. We give predictions for the forward and the longitudinal-transverse spin polarizabilities of the proton and the neutron at zero and finite photon virtuality. A detailed comparison to results obtained in heavy baryon chiral perturbation theory is also given.

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