Resonance Contribution to Radiative Neutron Capture on Lithium-7

Using halo effective field theory, we provide a model-independent calculation of the radiative neutron capture on lithium-7 over an energy range where the contribution from the 3+ resonance becomes important. One finds that a satisfactory description of the capture reaction, in the present single-particle approximation, suggests the use of a resonance width about three times larger than the experimental value. We also present power counting arguments that establish a hierarchy for electromagnetic oneand two-body currents. PACS numbers: 25.40.Lw, 25.20.-x