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Dispersion-Theoretical Analysis of the Nucleon Electromagnetic Formfactors

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arxiv hep-ph/9506375 v1 pith:XYMQLX5Z submitted 1995-06-20 hep-ph nucl-th

P. Mergell , Ulf-G. Mei{ss}ner , D. Drechsel This is my paper · ORCID
classification hep-phnucl-th
keywords nucleonelectromagneticfactorsformlargemomentumperturbativetransfer
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abstract

Dispersion relations allow for a coherent description of the nucleon electromagnetic form factors measured over a large range of momentum transfer, $Q^2 \simeq 0 \ldots 35$ GeV$^2$. Including constraints from unitarity and perturbative QCD, we present a novel parametrisation of the absorptive parts of the various isoscalar and isovector nucleon form factors. Using the current world data, we obtain results for the electromagnetic form factors, nucleon radii and meson couplings. We stress the importance of measurements at large momentum transfer to test the predictions of perturbative QCD.

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  1. Baryon Form Factors

    hep-ph 2024-12 accept novelty 2.0 of 10

    A review of baryon form factors summarizing the authors' dispersion-theoretical fits, which yield r_p^E = 0.840 fm, r_p^M = 0.849 fm, and r_n^M = 0.864 fm.

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