Elsevier

Nuclear Physics A

Volume 577, Issues 3–4, 26 September 1994, Pages 753-772
Nuclear Physics A

Vibrations versus collisions and the iterative structure of two-body dynamics

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Abstract

We adopt a truncated version of two-body dynamics by neglecting three-body correlations, as is supported by microscopic numerical calculations. Introducing orthogonal channel correlations for the pp- and the ph-channel and integrating the latter in terms of vibrational RPA-states we derive a retarded two-body equation. Its solution is nonperturbative with respect to loops, ladders and mixed contributions. In the stationary limit we obtain an equation for a generalised effective interaction which iterates both the G-matrix and the polarisation matrix. An in-medium scattering approach transparently demonstrates the collisional damping of the vibrations.

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    Supported by DFG and GSI Darmstadt.

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