Electromagnetic form factors of Σ+ and Σ− in the vector-meson dominance model
نویسندگان
چکیده
منابع مشابه
Vector meson dominance pion electromagnetic form factor with the σ−model loop corrections
A model is developed for electromagnetic form factor of the pion. One-loop corrections are included in the linear σ−model. The ρ−meson contribution is added in an extended VMD model. The form factor, calculated without fitting parameters, is in a good agreement with experiment for space-like and time-like photon momenta. Loop corrections to the two-pion hadronic contribution a (had,π) μ to the ...
متن کاملVector meson electromagnetic form factors
Germany bSchool of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK cInstitut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany dSchool of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, UK eJohn von Neumann-Institut für Computing NIC / DESY, 15738 Zeuthen, Germany f Theoretical Physics Division, Department of Mathematical S...
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We report the results of a very high statistics Monte Carlo study of the continuum limit of the two dimensional O(3) non-linear σ model. We find a significant discrepancy between the continuum extrapolation of our data and the form factor prediction of Balog and Niedermaier, inspired by the Zamolodchikovs’ S-matrix ansatz. On the other hand our results for the O(3) and the dodecahedron model ar...
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After describing the SU(2) linear sigma model (LσM), we dynamically generate it using the B.W. Lee null tadpole sum (characterizing the true vacuum) together with the dimensional regularization lemma. Next we generate the chiral-limiting (CL) nonstrange and strange constituent quark masses m̂ = 325.7 MeV; ms = 486 MeV away from the CL. Finally, we study vector meson dominance (VMD) and the pion,...
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ژورنال
عنوان ژورنال: Communications in Theoretical Physics
سال: 2021
ISSN: 0253-6102,1572-9494
DOI: 10.1088/1572-9494/abea0f