Relativistic pionic effects in quasielastic electron scattering

被引：28

作者：

Amaro, JE ^{[1
]}

Barbaro, MB

Caballero, JA

Donnelly, TW

Molinari, A

机构：

[1] Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain

[2] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[3] Ist Nazl Fis Nucl, Sezione Torino, I-10125 Turin, Italy

[4] Univ Sevilla, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain

[5] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[6] MIT, Ctr Theoret Phys, Nucl Sci Lab, Cambridge, MA 02139 USA

[7] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

NUCLEAR PHYSICS A | 2002年 / 697卷 / 1-2期

关键词：

inclusive electron scattering; pionic correlations; meson-exchange currents; relativistic Fermi gas;

D O I：

10.1016/S0375-9474(01)01253-2

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 impact of relativistic pionic correlations and meson-exchange currents on the response functions for electromagnetic quasielastic electron scattering from nuclei is studied in detail. Results in first-order perturbation theory are obtained for one-particle emission electronuclear reactions within the context of the relativistic Fermi gas model. Improving upon previous analyses where nonrelativistic reductions of the currents were performed, here a fully relativistic analysis in which both forces and currents are treated consistently is presented. Lorentz covariance is shown to play a crucial role in enforcing the gauge invariance of the theory. Effects stemming uniquely from relativity in the pionic correlations are identified and, in particular, a comprehensive study of the self-energy contributions and of the currents associated with the pion is presented. First- and second-kind scaling for high momentum transfer is investigated. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：388 / 428

页数：41

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