Analyzing the Effects of Neutron Polarizabilities in Elastic Compton Scattering off He-3
Dec, 2008
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Abstract: (Elsevier)
Motivated by the fact that a polarized 3 He nucleus is expected to behave approximately as a polarized neutron, we examine manifestations of neutron electromagnetic polarizabilities in elastic Compton scattering from the Helium-3 nucleus. We calculate both unpolarized and double-polarization observables using chiral perturbation theory to next-to-leading order ( O ( e 2 Q ) ) at energies, ω ≲ m π , where m π is the pion mass. Our results show that the unpolarized differential cross-section can be used to measure neutron electric and magnetic polarizabilities, while two double-polarization observables are sensitive to different linear combinations of the four neutron spin polarizabilities.Note:
- 40 pages, 16 figures
- 13.60.Fz
- 25.20.-x
- 21.45.+v
- Compton scattering
- Polarizabilities
- Chiral perturbation theory
- Few-nucleon system
References(67)
Figures(34)