منابع مشابه
Revealing Nuclear Pions Using Electron Scattering
A model for the pionic components of nuclear wave functions is obtained from light front dynamical calculations of binding energies and densities. The pionic effects are small enough to be consistent with measured nuclear dimuon production data and with the nucleon sea. But the pion effects are large enough to predict substantial nuclear enhancement of the cross section for longitudinally polar...
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We construct the explicit one–loop functional of chiral perturbation theory for two light flavours, including virtual photons. We stick to contributions where 1 or 2 mesons and at most one photon are running in the loops. With the explicit functional at hand, the evaluation of the relevant Green functions boils down to performing traces over the flavour matrices. For illustration, we work out t...
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The universal curve σ/A of nuclear photoabsorption is investigated within a Fermi gas model of nuclear matter. An energy range from pion threshold up to 400 MeV is considered. The interactions between nu-cleon, pion, ∆-isobar and photon are considered in the non-relativistic approximation with corrections of the order 1/M taken into account with respect to proton mass. Analytical expressions ar...
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متن کاملVirtual Compton Scattering—Generalized Polarizabilities of Nucleons and Pions
Virtual Compton scattering off nucleons and pions at low energies is discussed. Predictions for the generalized polarizabilities of the nucleon are presented within the framework of heavy-baryon chiral perturbation theory and the linear sigma model. First results for the generalized polarizabilities of the charged pion in chiral perturbation theory at O(p) are shown.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1964
ISSN: 0031-9007
DOI: 10.1103/physrevlett.13.57