On the cancellation of 4-derivative terms in the Volkov-Akulov action

Details On the cancellation of 4-derivative terms in the Volkov-Akulov action On the cancellation of 4-derivative terms in the Volkov-Akulov action

2010-03-22

arxiv.org/abs/1003.4143v2

Physics

High Energy Physics

High Energy Physics - Theory

18 pages; the version accepted for publication in Phys. Rev. D; new section regarding the proof of the equivalence between the

Scientific paper

Recently Kuzenko and McCarty observed the cancellation of 4-derivative terms in the $D=4 {\cal N}=1$ Volkov-Akulov supersymmetric action for the fermionic Nambu-Goldstone field. Here is presented a simple algebraic proof of the cancellation based on using the Majorana bispinors and Fiertz identities. The cancellation shows a difference between the Volkov-Akulov action and the effective superfield action recently studied by Komargodski and Seiberg and containing one 4-derivative term. We find out that the cancellation effect takes place in coupling of the Nambu-Goldstone fermion with the Dirac field. Equivalence between the KS and the VA Lagrangians is proved up to the first order in the interaction constant of the NG fermions.

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