Analyzing the Effects of Neutron Polarizabilities in Elastic Compton Scattering off He-3

Dec, 2008
40 pages
Published in:
  • Nucl.Phys.A 819 (2009) 98-134
e-Print:

Citations per year

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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