Local versus nonlocal $��$ interactions in $3��$ description of $^{12}$C

Authors :: Suzuki, Y.
Matsumura, H.
Orabi, M.
Fujiwara, Y.
Descouvemont, P.
Theeten, M.
Baye, D.
Publication Year :: 2007
Publisher :: arXiv, 2007.
Abstract: Local $��$ potentials fail to describe $^{12}$C as a $3��$ system. Nonlocal $��$ potentials that renormalize the energy-dependent kernel of the resonating group method allow interpreting simultaneously the ground state and $0^+_2$ resonance of $^{12}$C as $3��$ states. A comparison with fully microscopic calculations provides a measure of the importance of three-cluster exchanges in those states.<br />The tar.gz file has 1 tex file and 1 eps file