Nucleon Polarizabilities: Theory
B. Pasquini (U. Pavia & INFN, Pavia, Italy), D. Drechsel, M., Vanderhaeghen (Mainz U., Inst. Kernphys.)
TL;DR
This paper reviews recent theoretical advances in understanding nucleon polarizabilities, including static and generalized polarizabilities, and discusses their implications for nucleon structure and spatial polarization densities.
Contribution
It provides a comprehensive comparison of theoretical approaches to nucleon polarizabilities and explores the spatial interpretation of generalized polarizabilities in nucleon structure.
Findings
Comparison of different theoretical models for static polarizabilities
Extension of polarizability analysis to virtual Compton scattering
Insight into spatial polarization densities within the nucleon
Abstract
We review recent developments in the theoretical investigation of the nucleon polarizabilities. We first report on the static polarizabilities as measured in real Compton scattering, comparing and interpreting the results from various theoretical approaches. In a second step, we extend the discussion to the generalized polarizabilities which can be accessed in virtual Compton scattering, showing how the information encoded in these quantities can provide a spatial interpretation of the induced polarization densities in the nucleon.
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