Parity-violating longitudinal response

被引:13
作者
Barbaro, MB
DePace, A
Donnelly, TW
Molinari, A
机构
[1] IST NAZL FIS NUCL,SEZ TORINO,I-10125 TURIN,ITALY
[2] MIT,NUCL SCI LAB,CTR THEORET PHYS,CAMBRIDGE,MA 02139
[3] MIT,DEPT PHYS,CAMBRIDGE,MA 02139
关键词
D O I
10.1016/0375-9474(96)00010-3
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
The longitudinal quasielastic parity-violating electron scattering response is explored within the context of a model that builds antisymmetrized RPA-HF correlations on a relativistic Fermi gas basis, The large sensitivity to nuclear dynamics of this observable, found in previous studies where only pionic correlations were included, is shown to survive in the present model where the effects from pi, rho, sigma and omega exchange in a version of the Bonn potential are incorporated. Through an intricate diagrammatic cancellation/filtration mechanism the longitudinal parity-violating response turns out to be close to the one obtained in first-order perturbation theory with the pion alone, Finally, in accord with our previous work, the parity-violating response is seen to display appreciable sensitivity to the electric strangeness content of the nucleon, especially at high momentum transfer.
引用
收藏
页码:503 / 514
页数:12
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