Renormalization Group Equation for Low Momentum Effective Nuclear Interactions

Details Renormalization Group Equation for Low Momentum Effective Nuclear Interactions Renormalization Group Equation for Low Momentum Effective Nuclear Interactions

2001-11-13

arxiv.org/abs/nucl-th/0111042v1

Physics

Nuclear Physics

Nuclear Theory

14 pages, 2 figures

Scientific paper

We consider two nonperturbative methods originally used to derive shell model effective interactions in nuclei. These methods have been applied to the two nucleon sector to obtain an energy independent effective interaction V_{low k}, which preserves the low momentum half-on-shell T matrix and the deuteron pole, with a sharp cutoff imposed on all intermediate state momenta. We show that V_{low k} scales with the cutoff precisely as one expects from renormalization group arguments. This result is a step towards reformulating traditional model space many-body calculations in the language of effective field theories and the renormalization group. The numerical scaling properties of V_{low k} are observed to be in excellent agreement with our exact renormalization group equation.

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