Fate of the false vacuum in string-inspired nonlocal field theory

@article{Ghoshal2022FateOT,
  title={Fate of the false vacuum in string-inspired nonlocal field theory},
  author={Anish Ghoshal and Florian Nortier},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2022},
  volume={2022}
}
In this article, we study Coleman bounce in weakly nonlocal theories which are motivated from string field theory. The kinetic term is extended via an infinite series of high-order derivatives, which comes into play at an energy scale M, without introducing any new states or ghosts in the mass spectrum. We calculate the bubble nucleation in thin-wall approximation, treating the system in semi-classical manner. We find that the effect of nonlocal scale M in the theory is to suppress the vacuum… 

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