Solitons in generalized Galileon theories

@article{CarrilloGonzlez2016SolitonsIG,
  title={Solitons in generalized Galileon theories},
  author={Mariana Carrillo-Gonz{\'a}lez and Ali Masoumi and Adam R. Solomon and Mark Trodden},
  journal={Physical Review D},
  year={2016},
  volume={94},
  pages={125013}
}
We consider the existence and stability of solitons in generalized galileons, scalar field theories with higher-derivative interactions but second-order equations of motion. It has previously been proven that no stable, static solitons exist in a single galileon theory using an argument invoking the existence of zero modes for the perturbations. Here we analyze the applicability of this argument to generalized galileons and discuss how this may be avoided by having potential terms in the energy… 
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