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On the correlation between the binding energies of the triton and the alpha-particle

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arxiv nucl-th/0409040 v2 pith:H7DCXPHM submitted 2004-09-20 nucl-th hep-phnucl-ex

L. Platter , H.-W. Hammer , U.-G. Mei{ss}ner This is my paper
classification nucl-thhep-phnucl-ex
keywords alpha-particlebindingcorrelationenergiesinteractionsordertritoneffective
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We consider the correlation between the binding energies of the triton and the alpha-particle which is empirically observed in calculations employing different phenomenological nucleon-nucleon interactions. Using an effective quantum mechanics approach for short-range interactions with large scattering length |a| >> l, where l is the natural low-energy length scale, we construct the effective interaction potential at leading order in l/|a|. In order to renormalize the four-nucleon system, it is sufficient to include a SU(4)-symmetric one-parameter three-nucleon interaction in addition to the S-wave nucleon-nucleon interactions. The absence of a four-nucleon force at this order explains the empirically observed correlation between the binding energies of the triton and the alpha-particle. We calculate this correlation and obtain a prediction for the alpha-particle binding energy. Corrections to our results are suppressed by l/|a|.

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