Δ contribution in e+ + e- → p + (p)over-bar at small s

被引：4

作者：

Zhou, Hai Qing ^{[1
]}

Chen, Dian Yong ^{[2
]}

Dong, Yu Bing ^{[2
,3
]}

机构：

[1] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China

来源：

PHYSICS LETTERS B | 2009年 / 675卷 / 3-4期

关键词：

Two-photon exchange; Delta; Form factor;

D O I：

10.1016/j.physletb.2009.04.029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two-photon annihilate contributions in the process e(+) + e(-) p + (p) over bar including N and Delta intermediate are discussed in a simple hadronic model. The corrections to the Unpolarized cross section and polarized observables P-x, P-z are presented. The results show the two-photon annihilate correction to Unpolarized cross section is small and its angle dependence becomes weak at small s after considering the IN and Delta(1232) contributions Simultaneously, while the correction to Pz is enhanced. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：305 / 307

页数：3

共 15 条

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