Correlated momentum distribution in asymmetric nuclear matter

The understanding of the variation of microscopic nuclear properties with isospin asymmetry is an important issude for both nuclear experiments and theory. The recent results on nucleon knock-out reactions seem to indicate that there is a strong dependence of spectroscopic factor on isospin [1]. This could indicate that the occupation numbers of low-lying nuclear states are changing with asymmetry [2]. We perform realistic many-body calculations of asymmetric nuclear matter within the Self-Consistent Green's Functions method to study the impact of isospin asymmetry on the correlated momentum distributions of asymmetric nuclear matter [2,3]. Using different internucleon potentials, we assess the model dependence of these calculations and conclude that the change of $n(k)$ with isospin is well constrained from realistic calculations. \newline [1] A. Gade et al., Phys. Rev. C 77, 044306 (2008). \newline [2] T. Frick et al., Phys. Rev. C 71, 014313 (2005). \newline [3] W. Dickhoff and C. Barbieri, Prog. Part. Nucl. Phys 52, 377 (2004).