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arxiv: hep-ph/0203167 · v2 · submitted 2002-03-18 · ✦ hep-ph · nucl-ex· nucl-th

Novel analysis of chiral loop effects in the generalized Gerasimov-Drell-Hearn sum rule

classification ✦ hep-ph nucl-exnucl-th
keywords chiralbaryongeneralizedgerasimov-drell-hearnloopruleamplitudesanalysis
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We study the chiral loop corrections to the generalized Gerasimov-Drell-Hearn sum rule of the nucleon for finite photon virtuality in the framework of a Lorentz-invariant formulation of baryon chiral perturbation theory. We perform a complete one-loop calculation and obtain significant differences to previously found results based on the heavy baryon approach for the proton and neutron spin-dependent forward Compton amplitudes.

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