Virtual Compton scattering off the nucleon at low energies

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dc.creatorScherer, S.
dc.creatorKorchin, A. Yu.
dc.creatorKoch, J. H.
dc.date1996-05-21
dc.date.accessioned2026-07-07T11:15:46Z
dc.date.available2026-07-07T11:15:46Z
dc.descriptionWe investigate the low-energy behavior of the four-point Green's function $Γ^{μν}$ describing virtual Compton scattering off the nucleon. Using Lorentz invariance, gauge invariance, and crossing symmetry, we derive the leading terms of an expansion of the operator in the four-momenta $q$ and $q'$ of the initial and final photon, respectively. The model-independent result is expressed in terms of the electromagnetic form factors of the free nucleon, i.e., on-shell information which one obtains from electron-nucleon scattering experiments. Model-dependent terms appear in the operator at $O(q_αq'_β)$, whereas the orders $O(q_αq_β)$ and $O(q'_αq'_β)$ are contained in the low-energy theorem for $Γ^{μν}$, i.e., no new parameters appear. We discuss the leading terms of the matrix element and comment on the use of on-shell equivalent electromagnetic vertices in the calculation of ``Born terms'' for virtual Compton scattering.
dc.description26 pages, RevTex, to appear in Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/nucl-th/9605030
dc.identifierhttp://arxiv.org/abs/nucl-th/9605030
dc.identifierPhys.Rev.C54:904-919,1996
dc.identifierdoi:10.1103/PhysRevC.54.904
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192494
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleVirtual Compton scattering off the nucleon at low energies
dc.typetext

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