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We calculate the two-body triton photodisintegration cross section as a function of photon energy to next-to-next-to leading order (NNLO) in pionless effective field theory (EFT (\!\!/) ) and show good agreement with experiment. In addition we calculate the polarization asymmetry RC=-0. 441 (15) in cold neutron-deuteron capture to NNLO in EFT (\!\!/), in agreement with the experimental value of RC=-0. 42 0. 03 M. W. Konijnenberg et al. in Phys. Lett. B 205, 215 (1988). We also assess the dependence of RC on different fits of the two-nucleon magnetic currents. Finally, we consider the impact of Wigner-SU (4) symmetry and demonstrate that starting from the Wigner-SU (4) symmetric limit and including perturbative corrections to the breaking of Wigner-SU (4) symmetry does a good job of describing two-body triton photodisintegration.
Lin et al. (Mon,) studied this question.
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