Meson exchange in lepton-nucleon scattering and the proton radius puzzle

被引：11

作者：

Borisyuk, Dmitry ^{[1
]}

机构：

[1] Bogolyubov Inst Theoret Phys, 14-B Metrol Skaya St, UA-03680 Kiev, Ukraine

来源：

PHYSICAL REVIEW C | 2017年 / 96卷 / 05期

关键词：

2-PHOTON-EXCHANGE; CONSTANTS;

D O I：

10.1103/PhysRevC.96.055201

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：

I study two-photon contribution to the elastic lepton-proton scattering, associated with sigma meson exchange, with special attention paid to the low-Q(2) region. It is shown that the corresponding amplitude grows sharply but remains finite at Q(2) -> 0. The analytical formula for the amplitude at Q(2) = 0 is obtained. I also estimate the shift of the muonic hydrogen energy levels, induced by s meson exchange. For the 2S level the shift is approximately 30 times smaller than needed to resolve the proton radius puzzle, but still exceeds the precision of the muonic hydrogen measurements.

引用

页数：6

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