Regular Article - Theoretical Physics
Leading-order actions of Goldstino fields
Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou, Zhejiang, 310027, P.R. China
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Revised: 28 September 2011
Published online: 8 November 2011
This paper starts with a self-contained discussion of the so-called Akulov–Volkov action , which is traditionally taken to be the leading-order action of the Goldstino field. Explicit expressions for and its chiral version are presented. We then turn to the issue on how these actions are related to the leading-order action proposed in the newly proposed constrained superfield formalism. We show that may yield or a totally different action , depending on how the auxiliary field in the former is integrated out. However, and always yield the same S-matrix elements, as one would have expected from general considerations in quantum field theory.
© Springer-Verlag / Società Italiana di Fisica, 2011