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- W3124014714 abstract "This lecture comprises some recent developments concerning the description of baryons as topological solitons in effective chiral meson theories. In the first part one-loop corrections to the classical tree approximation are discussed. This involves renormalization of low-energy coupling constants and evaluation of the finite next-to-leading-order terms in the 1Nc expansion. In contrast to the corresponding procedure in the meson sector the magnitude of the chiral gradients involved in the soliton profile requires that counter terms and finite loop contributions be calculated to all chiral orders. Recent results for various nucleon observables are presented. They show that the 1Nc expansion essentially works as expected. In the second part electro-magnetic nucleon form factors (FFs) with relativistic corrections are evaluated in a chiral soliton model including vector mesons. The magnetic FF GMp is shown to agree well with new SLAC data for spacelike Q2 up to 30 (GeV/c)2 if superconvergence is enforced. The electric FF GEp is dominated by a zero in the few (GeV/c)2 region due to a low-lying zero in the non-relativistic electric FF in tree approximation. The third part describes how to extract the strong πNN form factor from chiral soliton models, taking due care of the local metric created by the presence of the soliton. When used in a one-boson-exchange model for the nucleon-nucleon (NN) interaction, deuteron properties and phase parameters of NN scattering are reproduced as well as in conventional NN models that apply a hard monopole form factor at the πNN vertex." @default.
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- W3124014714 date "1996-01-01" @default.
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- W3124014714 title "Baryons as solitons in effective chiral field theories" @default.
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- W3124014714 doi "https://doi.org/10.1016/0146-6410(96)00021-x" @default.
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