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Probing Resonances of the Dirac Equation with Complex Momentum Representation
Niu Li1, Min Shi1, Jian-You Guo1
1School of Physics and Materials Science, Anhui University, Hefei 230601, People's Republic of China.
Abstract:
Resonance plays critical roles in the formation of many physical phenomena, and several methods have been developed for the exploration of resonance. In this work, we propose a new scheme for resonance by solving the Dirac equation in the complex momentum representation, in which the resonant states are exposed clearly in the complex momentum plane and the resonance parameters can be determined precisely without imposing unphysical parameters. Combined with the relativistic mean-field theory, this method is applied to probe the resonances in ^{120}Sn with the energies, widths, and wave functions being obtained. Compared to other methods, this method is not only very effective for narrow resonances, but also can be reliably applied to broad resonances.
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