It was argued in  that the Volkov-Akulov (VA) model as well as similar models in supergravity and the related KKLT model in string theory, suffer from tachyonic instabilities due to goldstino condensation. The authors of  constructed a specific model with two unconstrained interacting chiral superfields with linearly realized supersymmetry which has an unstable vacuum. They claimed that this model becomes equivalent to the VA model in the UV limit. We show that the UV limit of their model is discontinuous, and the vacuum instability of the model proposed in  is not relevant to the VA model, to related models in supergravity, and to the KKLT construction.
- Supergravity Models
- Supersymmetry Breaking
ASJC Scopus subject areas
- Nuclear and High Energy Physics