Review of two-photon exchange in electron scattering

被引：145

作者：

Arrington, J. ^{[2
]}

Blunden, P. G. ^{[3
]}

Melnitchouk, W. ^{[1
]}

机构：

[1] Jefferson Lab, Newport News, VA 23606 USA

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[3] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada

来源：

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS | 2011年 / 66卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Two-photon exchange; Radiative corrections; Form factors; PROTON ELASTIC-SCATTERING; ELECTROMAGNETIC FORM-FACTORS; RADIATIVE-CORRECTIONS; POLARIZABILITY CORRECTION; 4-MOMENTUM TRANSFERS; COMPTON-SCATTERING; CROSS-SECTION; POSITRONS; RATIO; DISPERSION;

D O I：

10.1016/j.ppnp.2011.07.003

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：

We review the role of two-photon exchange (TPE) in electron-hadron scattering, focusing in particular on hadronic frameworks suitable for describing the low and moderate Q(2) region relevant to most experimental studies. We discuss the effects of TPE on the extraction of nucleon form factors and their role in the resolution of the proton electric to magnetic form factor ratio puzzle. The implications of TPE on various other observables, including neutron form factors, electroproduction of resonances and pions, and nuclear form factors, are summarized. Measurements seeking to directly identify TPE effects, such as through the angular dependence of polarization observables, nonlinear epsilon contributions to the cross sections, and via e(+)p to e(-)p cross section ratios, are also outlined. In the weak sector, we describe the role of TPE and gamma Z interference in parity-violating electron scattering, and assess their impact on the extraction of the strange form factors of the nucleon and the weak charge of the proton. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：782 / 833

页数：52

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