Probing nucleon-nucleon correlations with (e,e'p) and (e,e'pp) reactions

Details Probing nucleon-nucleon correlations with (e,e'p) and (e,e'pp) reactions Probing nucleon-nucleon correlations with (e,e'p) and (e,e'pp) reactions

2004-02-13

arxiv.org/abs/nucl-th/0402047v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 6 figures, talk presented at EEp03 "International workshop on probing nucleons and nuclei via the (e,e'p) reaction",

Scientific paper

Some of the recent attempts to detect signals of nucleon-nucleon correlations with semi-exclusive A(e,e'p) and exclusive A(e,e'pN) processes are reviewed. Unfactorized and distorted-wave calculations for these processes are discussed. The calculations implement two-body currents stemming from pion-exchange and intermediate $\Delta$ excitation. The two-body currents are shown to be highly competitive with the mechanisms related to nucleon-nucleon correlations. This observation seriously hampers attempts to link semi-exclusive A(e,e'p) measurements, which probe high missing energies, to the correlated part of the nuclear spectral function. Signals of central short-range correlations (SRC) have been detected in (e,e'pp) measurements on ^{12}C and ^{16}O, thereby confirming the picture that in hadronic matter SRC solely affect nucleon pairs with a small center-of-mass momentum and residing in a relative S state.

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