Dispersion Theory in Electromagnetic Interactions

被引：25

作者：

Pasquini, Barbara ^{[1
,2
]}

Vanderhaeghen, Marc ^{[3
,4
]}

机构：

[1] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[2] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[3] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[4] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

来源：

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, VOL 68 | 2018年 / 68卷

关键词：

dispersion relations; sum rules; Compton scattering; proton polarizabilities; two-photon exchange processes; VIRTUAL COMPTON-SCATTERING; CHIRAL PERTURBATION-THEORY; TOTAL CROSS-SECTION; LOW-ENERGY THEOREMS; LINEAR SIGMA-MODEL; OF-MASS ENERGY; HEARN SUM-RULE; GENERALIZED POLARIZABILITIES; MUONIC HYDROGEN; MAGNETIC POLARIZABILITIES;

D O I：

10.1146/annurev-nucl-101917-020843

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 various applications of dispersion relations (DRs) to the electromagnetic structure of hadrons. We discuss the way DRs allow one to extract information about hadron structure constants by connecting information from complementary scattering processes. We consider the real and virtual Compton scattering processes offthe proton, and summarize recent advances in the DR analysis of experimental data to extract the proton polarizabilities, in comparison with alternative studies based on chiral effective field theories. We discuss a multipole analysis or real Compton scattering data, along with a DR It of the energy-dependent dynamical polarizabilities. Furthermore, we review new sum rules for the double-virtual Compton scattering process off the proton, which allow for model-independent relations between polarizabilities in real and virtual Compton scattering, and moments of nucleon structure functions. Information on double-virtual Compton scattering is used to predict and constrain the polarizability corrections to muonic hydrogen spectroscopy.

引用

页码：75 / 103

页数：29

共 147 条

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