Nucleon form factors in dispersively improved chiral effective field theory. II. Electromagnetic form factors
نویسندگان
چکیده
منابع مشابه
Nucleon electromagnetic form factors on the lattice and in chiral effective field theory
QCDSF Collaboration aInstitut für Theoretische Physik, Universität Leipzig, D-04109 Leipzig, Germany bInstitut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany cPhysik-Department, Theoretische Physik, Technische Universität München, D-85747 Garching, Germany dSchool of Physics, University of Edinburgh, Edinburgh EH9 3JZ, UK eJohn von Neumann-Institut für Computing NI...
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A Poincaré covariant Faddeev equation, which describes baryons as composites of confined-quarks and -nonpointlike-diquarks, is solved to obtain masses and Faddeev amplitudes for the nucleon and ∆. The amplitudes are a component of a nucleon-photon vertex that automatically fulfills the Ward-Takahashi identity for on-shell nucleons. These elements are sufficient for the calculation of a quark co...
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The electromagnetic form factors of the nucleon are calculated in an extended chiral constituent-quark model where the effective interaction is described by the exchange of pseudoscalar, vector, and scalar mesons. Two-body current-density operators, constructed consistently with the extended model Hamiltonian in order to preserve gauge invariance and current conservation, are found to give a si...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2018
ISSN: 2469-9985,2469-9993
DOI: 10.1103/physrevc.97.055203