Axial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory

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dc.creatorSchindler, M. R.
dc.creatorFuchs, T.
dc.creatorGegelia, J.
dc.creatorScherer, S.
dc.date2006-11-22
dc.date.accessioned2026-07-07T11:23:55Z
dc.date.available2026-07-07T11:23:55Z
dc.descriptionWe calculate the nucleon form factors G_A and G_P of the isovector axial-vector current and the pion-nucleon form factor G_piN in manifestly Lorentz-invariant baryon chiral perturbation theory up to and including order O(p^4). In addition to the standard treatment including the nucleon and pions, we also consider the axial-vector meson a_1 as an explicit degree of freedom. This is achieved by using the reformulated infrared renormalization scheme. We find that the inclusion of the axial-vector meson effectively results in one additional low-energy coupling constant that we determine by a fit to the data for G_A. The inclusion of the axial-vector meson results in an improved description of the experimental data for G_A, while the contribution to G_P is small.
dc.description21 pages, 9 figures, REVTeX4
dc.identifierhttps://arxiv.org/abs/nucl-th/0611083
dc.identifierhttp://arxiv.org/abs/nucl-th/0611083
dc.identifierPhys.Rev.C75:025202,2007
dc.identifierdoi:10.1103/PhysRevC.75.025202
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195053
dc.subjectNuclear Theory
dc.titleAxial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory
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