Precise determination of low-Q nucleon electromagnetic form factors and their impact on parity-violating e-p elastic scattering

被引：57

作者：

Arrington, John ^{[1
]}

Sick, Ingo

机构：

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

[2] Univ Basel, Dept Phys & Astron, Basel, Switzerland

来源：

PHYSICAL REVIEW C | 2007年 / 76卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.76.035201

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 extraction of the strangeness form factors from parity-violating elastic electron-proton scattering is sensitive to the electromagnetic form factors at low Q(2). We provide parametrizations for the form factors and uncertainties, including the effects of two-photon exchange corrections to the extracted electromagnetic form factors. We study effect of the correlations between different form factors, in particular as they impact the parity-violating asymmetry and the extraction of the strangeness form factors. We provide a prescription to extract the strangeness form factors from the asymmetry that provides an excellent approximation of the full two-photon correction. The corrected form factors are also appropriate as input for other low-Q analyses, although the effects of correlations and two-photon exchange corrections may be different.

引用

页数：9

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