Short range correlations and the isospin dependence of nuclear correlation functions

• DOI: 10.1016/j.physletb.2018.07.069
• Publication Date: 2018-08-30T16:22:05Z
• Authors: R. Cruz-Torres; A. Schmidt; G.A. Miller; L.B. Weinstein; N. Barnea; R. Weiss; E. Piasetzky; O. Hen
• Keywords: Contact formalism; Nuclear Theory; Physics; QC1-999; FOS: Physical sciences; Short range correlations; 01 natural sciences; Elementary Particles and Fields and String Theory; Nuclear Theory (nucl-th); Correlation function; 0103 physical sciences; Nuclear; Nuclear Experiment (nucl-ex); Nuclear Experiment

Pair densities and associated correlation functions provide a critical tool for introducing many-body correlations into a wide-range of effective theories. Ab initio calculations show that two-nucleon pair-densities exhibit strong spin and isospin dependence. However, such calculations are not available for all nuclei of current interest. We therefore provide a simple model, which involves combining the short and long separation distance behavior using a single blending function, to accurately describe the two-nucleon correlations inherent in existing ab initio calculations. We show that the salient features of the correlation function arise from the features of the two-body short-range nuclear interaction, and that the suppression of the pp and nn pair-densities caused by the Pauli principle is important. Our procedure for obtaining pair-density functions and correlation functions can be applied to heavy nuclei which lack ab initio calculations.<br/>5 pages, 4 figures<br/>