Abstract
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. We also present power counting arguments that establish a hierarchy for electromagnetic one- and two-body currents. One finds that a satisfactory description of the capture reaction, in the present single-particle approximation, requires a resonance width about three times larger than the experimentally quoted value.
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Fernando, L., Higa, R. & Rupak, G. Leading E1 and M1 contributions to radiative neutron capture on lithium-7. Eur. Phys. J. A 48, 24 (2012). https://doi.org/10.1140/epja/i2012-12024-7
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DOI: https://doi.org/10.1140/epja/i2012-12024-7