Long- and short-range correlations in the ab-initio no-core shell model

Details Long- and short-range correlations in the ab-initio no-core shell model Long- and short-range correlations in the ab-initio no-core shell model

2006-01-25

arxiv.org/abs/nucl-th/0601076v1

Phys.Rev. C73 (2006) 037307

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures

Scientific paper

10.1103/PhysRevC.73.037307

In the framework of the ab-initio no-core shell model (NCSM), we describe the longitudinal-longitudinal distribution function, part of the inclusive (e,e') longitudinal response. In the two-body cluster approximation, we compute the effective operators consistent with the unitary transformation used to obtain the effective Hamiltonian. When short-range correlations are probed, the results display independence from the model space size and length scale. Long-range correlations are more difficult to model in the NCSM and they can be described only by increasing the model space or increasing the cluster size. In order to illustrate the model space independence for short-range observables, we present results for a large set of model spaces for 4He, and in 0-4hw model spaces for 12C.

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