Spectral Functions and the Momentum Distribution of Nuclear Matter
A self-consistent Green’s Function approach is used to study the influence of shortrange correlations beyond the mean field picture of nuclei. The ladder equation, including both particle-particle and hole-hole propagation, is solved in nuclear matter for a semi-realistic interaction derived from the Reid soft core potential. The nucleon spectral functions are calculated from the momentum and energy dependent self-energy. An important fraction of the single particle strength is moved at very high energy due to the strong short-range repulsion in the interaction. The momentum distribution is calculated from the hole spectral function and an average depletion of normally fully occupied states of about 13% is found at normal density.
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