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Electromagnetic form factors of the nucleon in effective field theory

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arxiv 1209.3872 v1 pith:ZVMWNQYI submitted 2012-09-18 nucl-th hep-phnucl-ex

T. Bauer , J. C. Bernauer , S. Scherer This is my paper · ORCID
classification nucl-thhep-phnucl-ex
keywords factorsformtheoryeffectivechiralelectromagneticfieldnucleon
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We calculate the electromagnetic form factors of the nucleon to third chiral order in manifestly Lorentz-invariant effective field theory. The rho and omega mesons as well as the Delta(1232) resonance are included as explicit dynamical degrees of freedom. To obtain a self-consistent theory with respect to constraints we consider the proper relations among the couplings of the effective Lagrangian. For the purpose of generating a systematic power counting, the extended on-mass-shell renormalization scheme is applied in combination with the small-scale expansion. The results for the electric and magnetic Sachs form factors are analyzed in terms of experimental data and compared to previous findings in the framework of chiral perturbation theory. The pion-mass dependence of the form factors is briefly discussed.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Top-quark Partial Compositeness beyond the effective field theory paradigm

    hep-ph 2019-08 conditional novelty 6.0 of 10

    In a simplified partial-compositeness model, energy-dependent gluon form factors suppress heavy top partner production by up to an order of magnitude and add a few-percent distortion to quark-initiated top pair production.

  2. Implications of exclusive photon leptoproduction measurements for the proton charge-radius puzzle

    hep-ph 2026-07 conditional novelty 5.0 of 10

    After excluding or cutting low-|t| CLAS 2018 data, BH-dominated EP measurements yield a proton charge radius smaller than the PDG average and consistent with PRad and muonic hydrogen.

  3. Pion photoproduction off nucleons in covariant chiral perturbation theory

    hep-ph 2019-08 conditional novelty 5.0 of 10

    Including the Delta(1232) resonance in a third-order covariant chiral perturbation theory fit reproduces near-threshold pion photoproduction data across all charge channels far better than leaving it out.

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