Calculation of two-photon exchange effects for Δ production in electron-proton collisions

被引：13

作者：

Kondratyuk, S. ^{[1
]}

Blunden, P. G. ^{[1
]}

机构：

[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

来源：

NUCLEAR PHYSICS A | 2006年 / 778卷 / 1-2期

关键词：

two-photon exchange effects; inelastic electron-proton scattering;

D O I：

10.1016/j.nuclphysa.2006.07.038

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 present an evaluation of a two-photon exchange correction to the cross section for unpolarized Delta isobar production in electron-proton collisions, using a relativistic, crossing symmetric and gauge invariant approach. The calculated box and crossed-box diagrams include nucleon and Delta intermediate states. We find a relation between the angular nonlinearity of the two-photon exchange contribution and the value of the gamma Delta Delta coupling constant. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：44 / 52

页数：9

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