Dispersion theoretical analysis of the nucleon form factors

被引：0

作者：

Hammer, Hans-Werner ^{[1
,2
]}

Meissner, Ulf-G. ^{[3
,4
,5
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[3] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[4] Forschungszentrum Julich, Inst Kernphys IKP 3, Inst Adv Simulat IAS 4, D-52145 Julich, Germany

[5] Julich Ctr Hadron Phys, D-52145 Julich, Germany

来源：

SUBNUCLEAR STRUCTURE OF MATTER: ACHIEVEMENTS AND CHALLENGES | 2017年 / 134卷

关键词：

ENERGY-DEPENDENCE; PROTON; EXTRACTION; SCATTERING; RADIUS;

D O I：

10.1051/epjconf/201713404001

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We review the achievements of the project C.2, that deals with a dispersion theoretical analysis of the nucleon form factors. We have analyzed the world data for the space-like and time-like form factors to extract nucleon radii and vector meson coupling constants. Our proton charge radius r(E)(p) similar or equal to 0.85 fm has gained prominence in the so-called proton radius puzzle, see Ref. [1]. We also have analyzed the strong energy-dependence of the e(+)e- -> (p) over barp amplitude at the nucleon-antinucleon threshold, two-photon exchange effects and isospin violation in the isovector nucleon form factors.

引用

页数：5

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