Predictions for Polarized-Beam/Vector-Polarized-Target Observables in Elastic Compton Scattering on the Deuteron
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Motivated by developments at HIGS at TUNL that include increased photon flux and the ability to circularly polarize photons, we calculate several beam-polarization/target-spin dependent observables for elastic Compton scattering on the deuteron. This is done at energies of the order of the pion mass within the framework of Heavy Baryon Chiral Perturbation Theory. Our calculation is complete to O(Q^3) and at this order there are no free parameters. Consequently, the results reported here are predictions of the theory. We discuss paths that may lead to the extraction of neutron polarizabilities. We find that the photon/beam polarization asymmetry is not a good observable for the purpose of extracting α_n and β_n. However, one of the double polarization asymmetries, Σ_x, shows appreciable sensitivity to γ_{1n} and could be instrumental in pinning down the neutron spin polarizabilities.
26 pages, 13 figures, revised version to be published in PRC
26 pages, 13 figures, revised version to be published in PRC