Kinematical relativistic effects in ((e)over-right-arrow, e′ (N)over-right-arrow) reactions

被引：12
|
作者：
Martínez, MC
Caballero, JA
Donnelly, TW
机构：
[1] Univ Sevilla, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain
[2] MIT, Ctr Theoret Phys, Nucl Sci Lab, Cambridge, MA 02139 USA
[3] MIT, Dept Phys, Cambridge, MA 02139 USA
来源：
NUCLEAR PHYSICS A | 2002年 / 707卷 / 1-2期
关键词：
nuclear reactions; coincidence electron scattering; polarized responses; transferred polarization asymmetries; semi-relativistic expansions; on- and off-shell prescriptions;
D O I：
10.1016/S0375-9474(02)00879-5
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：
Kinematical relativistic effects are analyzed within the plane-wave impulse approximation for outgoing nucleon polarized responses in coincidence electron scattering. Following recent approaches for semi-relativistic reductions of the electromagnetic current operator, here an exact treatment of the problem for the transferred energy and momentum is presented. Rather than employing existing semi-relativistic expressions for the single-nucleon matrix elements, in this work the response functions are expanded directly. Results are compared for different kinematical situations with the fully-relativistic PWIA calculation as well as with previous expansions. Off- and on-shell prescriptions are also studied in detail, and a systematic analysis of the various kinematical variables involved in the process is presented. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：121 / 160
页数：40
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