Partonic calculation of the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer

被引：215

作者：

Chen, YC ^{[1
]}

Afanasev, A

Brodsky, SJ

Carlson, CE

Vanderhaeghen, M

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[2] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[3] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[4] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.122301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We estimate the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer through the scattering off a parton in the proton. We relate the two-photon exchange amplitude to the generalized parton distributions which appear in hard exclusive processes. We find that when taking the polarization transfer determinations of the form factors as input, adding in the 2-photon correction does reproduce the Rosenbluth cross sections.

引用

页码：122301 / 1

页数：4

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