Abstract
A microscopic theory based on orthogonal correlated basis functions is presented for the single particle spectral function of an infinite Fermi system. The method is used to calculate the nucleon spectral function P(k,E) for a realistic model of nuclear matter in which spin-isospin and tensor correlations are fully taken into account. P(k, E) is analyzed in terms of a single-particle strength, completely determined by two-body breakup processes, and a background, mainly provided by three-body breakup processes. The strength of single-particle states close to the Fermi surface can be measured by (e,e′p) reactions in kinematical conditions corresponding to low missing energy E, whereas the background requires a wide range of E values, extended up to several hundreds of MeV. The relations between P(k, E), the momentum distribution n(k)and the response function S(q, w) at high momentum transfers are discussed.
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© 1990 Plenum Press, New York
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Benhar, O., Fabrocini, A., Fantoni, S. (1990). Correlated Wave Functions Theory of the Spectral Function. In: Aguilera-Navarro, V.C. (eds) Condensed Matter Theories. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0605-4_3
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DOI: https://doi.org/10.1007/978-1-4613-0605-4_3
Publisher Name: Springer, Boston, MA
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