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Investigating Neutron Polarizabilities through Compton Scattering on $^3$He

Deepshikha Choudhury·Andreas Nogga·Daniel R. Phillips
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Abstract

We examine manifestations of neutron electromagnetic polarizabilities in coherent Compton scattering from the Helium-3 nucleus. We calculate $γ^3$He elastic scattering observables using chiral perturbation theory to next-to-leading order (${\mathcal O}(e^2 Q)$). We find 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 added in 2018] An erratum for this paper has been posted as arXiv:1804.01206. Overall conclusions are unchanged, but quantitative results are affected appreciably.

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Deepshikha Choudhury, Andreas Nogga, Daniel R. Phillips. 2018-04-05. Investigating Neutron Polarizabilities through Compton Scattering on $^3$He. https://doi.org/10.1103/physrevlett.98.232303

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