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Delta-Hole Interaction in Nuclei and the Gamow-Teller Strength in 90Nb

Akito Arima, Wolfgang Bentz, Toshio Suzuki, Toshio Suzuki

nucl-tharXiv:nucl-th/0008029

Abstract

The recently obtained experimental result for the quenching of the GT sum rule in the reaction 90Zr(p,n)90Nb is used to extract the value of the Landau-Migdal parameter gNΔ', taking into account also the effect of the finite range meson exchange interactions. The extracted value is compared to the one obtained in the π+ρexchange model by explicitly taking into account the effects of antisymmetrization and short range correlations. Although the π+ρexchange model tends to give a somewhat stronger quenching than observed experimentally, the results are consistent within the experimental error bars if the quark model value for the parameter fΔ/fπis used.

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