Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-08-02
Phys.Rev. C71 (2005) 044321
Physics
Nuclear Physics
Nuclear Theory
22 pages, 8 figures included, replaced with the version submitted to PRC
Scientific paper
10.1103/PhysRevC.71.044321
Polarized Compton scattering on the deuteron is studied in nuclear effective field theory. A set of tensor structures is introduced to define 12 independent Compton amplitudes. The scalar and vector amplitudes are calculated up to ${\cal O}((Q/\Lambda)^2)$ in low-energy power counting. Significant contribution to the vector amplitudes is found to come from the spin-orbit type of relativistic corrections. A double-helicity dependent cross section $\Delta_1 \sigma = (\sigma_{+1-1}-\sigma_{+1+1})/2$ is calculated to the same order, and the effect of the nucleon isoscalar spin-dependent polarizabilities is found to be smaller than the effect of isoscalar spin-independent ones. Contributions of spin-independent polarizabilities are investigated in various asymmetries, one of which has as large as 12 (26) percent effect at the center-of-mass photon energy 30 (50) MeV.
Chen Jiunn-Wei
Ji Xiangdong
Li Yingchuan
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