
Gang Chen, YiJian Du, Shuyi Li, Hanqing Liu
Note on offshell relations in nonlinear sigma model
Abstract
In this note, we investigate relations between treelevel offshell currents in nonlinear sigma model. Under Cayley parametrization, all oddpoint currents vanish. We propose and prove a generalized U(1) identity for evenpoint currents. The offshell U(1) identity given in [1] is a special case of the generalized identity studied in this note. The onshell limit of this identity is equivalent with the onshell KK relation. Thus this relation provides the full offshell correspondence of treelevel KK relation in nonlinear sigma model.
LU TP 1442
