Note on off-shell relations in nonlinear sigma model

被引：17

作者：

Chen, Gang ^{[1
]}

Du, Yi-Jian ^{[2
]}

Li, Shuyi ^{[1
]}

Liu, Hanqing ^{[1
]}

机构：

[1] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[2] Lund Univ, Dept Astron & Theoret Phys, S-22362 Lund, Sweden

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 03期

基金：

中国博士后科学基金; 瑞典研究理事会;

关键词：

Scattering Amplitudes; Sigma Models;

D O I：

10.1007/JHEP03(2015)156

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：

In this note, we investigate relations between tree-level off-shell currents in nonlinear sigma model. Under Cayley parametrization, all odd-point currents vanish. We propose and prove a generalized U(1) identity for even-point currents. The off-shell U(1) identity given in [1] is a special case of the generalized identity studied in this note. The on-shell limit of this identity is equivalent with the on-shell KK relation. Thus this relation provides the full off-shell correspondence of tree-level KK relation in nonlinear sigma model.

引用

页数：27

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