Why is the three-nucleon force so odd? art. no. 044005

被引:20
作者
Canton, L
Schadow, W
机构
[1] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[2] TRIUMF, Vancouver, BC V6T 2A3, Canada
来源
PHYSICAL REVIEW C | 2000年 / 62卷 / 04期
关键词
D O I
10.1103/PhysRevC.62.044005
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
By considering a class of diagrams which has been overlooked also in the most recent literature on three-body forces, we extract a new contribution to the three-nucleon interaction which specifically acts on the tripler odd states of the two-nucleon subsystem. In the static approximation, this 3N-force contribution is fixed by the underlying 2N interaction, so in principle there are no free parameters to adjust. The 2N amplitude however enters in the 3NF diagram in a form which cannot be directly accessed or constrained by NN phase-shift analysis. We conclude that this new 3N-force contribution provides a mechanism which implies that the presence of the third nucleon modifies the p-wave (and possibly the f-wave) components of the 2N subsystem in the triplet-isotriplet channels.
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页数:9
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