PKU-CUSTIPEN 2015 Dirac Brueckner Hartree Fock and beyond Herbert Mther Institute of Theoretical Physics 2 | 2015 Universitt Tbingen Realistic NN Interaction: Fit 2N Data Local and Nonlocal NN Interactions 3 2015 Universitt Tbingen Potential uncorrel wave correl wave r Energy of nuclear matter in HF approx. Correlations: more attractive larger 4 | 2015 Universitt Tbingen Does Vlowk solve our problem? requires a density dependent CT or 3N force, to obtain saturation this phenomenological CT dominates No ! Def:particle propagation hole propagation Fourier Transformation: Spectral function S h (k, ): probability for the removal of particle with momentum k and energy n(k) = Single-particle Greens function: infinite matter Solve Dyson equation Calculate Greens function Evaluate self-energy (k, ) self-consistency required: one and two-body Greens functions Bonn 2005, 7 Examples for Spectral functions S(k,w) QPGF: quasiparticle approx. in evaluating SCGF: self-consistent Spectral function and momentum distribution: with T. Frick Explore momentum distribution in (e,e)p ? Nukleons with large momenta only at large missing energies