Nucleon Polarisabilities from Deuteron Compton Scattering, and Its Lessons for Chiral Power Counting

Details Nucleon Polarisabilities from Deuteron Compton Scattering, and Its Lessons for Chiral Power Counting Nucleon Polarisabilities from Deuteron Compton Scattering, and Its Lessons for Chiral Power Counting

2006-11-20

arxiv.org/abs/nucl-th/0611074v1

Physics

Nuclear Physics

Nuclear Theory

3 pages LaTeX2e, including 1 figures in 2 .eps files embedded with includegraphicx. Contribution to the 5th International Work

Scientific paper

A brief review of Compton scattering off the deuteron in Chiral Effective Field Theory, including gauge invariance and the correct Thomson limit. We model-independently determine the iso-scalar, spin-independent dipole polarisabilities of the nucleon at zero energy from all Compton data below 100 MeV as \alpha_{E1}^s=11.3+-0.7_{stat}\+-0.6_{Baldin}+-1_{theory}, \beta_{M1}^s=3.2-+0.7_{stat}+-0.6_{Baldin}+-1_{theory}, each in 10^{-4} fm^3. Proton and neutron polarisabilities are therefore identical within (predominantly statistical) errors.

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