Nucleon form factors in a covariant diquark-quark model

被引：52

作者：

Hellstern, G ^{[1
]}

Alkofer, R ^{[1
]}

Oettel, M ^{[1
]}

Reinhardt, H ^{[1
]}

机构：

[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

来源：

NUCLEAR PHYSICS A | 1997年 / 627卷 / 04期

关键词：

baryon structure; diquarks; Bethe-Salpeter equation; form factors;

D O I：

10.1016/S0375-9474(97)00514-9

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：

In a model where constituent quarks and diquarks interact through quark exchange the Bethe-Salpeter equation in ladder approximation for the nucleon is solved. Quark and diquark confinement is effectively parametrized by choosing appropriately modified propagators. The coupling to external currents is implemented via non-trivial vertex functions for quarks and diquarks to ensure gauge invariance at the constituent level. Nucleon matrix elements are evaluated in a generalized impulse approximation, and electromagnetic, pionic and axial form factors are calculated. (C) 1997 Elsevier Science B.V.

引用

页码：679 / 709

页数：31

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