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- W4385227515 abstract "Tachyon condensation in quantum field theory (QFT) plays a central role in models of fundamental interactions and cosmology. Inspired by tower truncation in string field theory, ultraviolet completions were proposed with infinite-derivative form factors that preclude the appearance of pathological ghosts in the particle spectrum, contrary to other local higher-derivative QFT's. However, if the infinite-derivative QFT exhibits other vacua, each of them has its own spectrum, which is generally not ghost-free: an infinite tower of ghost-like resonances pops up above the nonlocal scale at tree-level, whose consistency is unclear. In this article, a new weakly nonlocal deformation of a generic local QFT is introduced via a Lorentz and gauge invariant star-product of fields, which is commutative but nonassociative in general. This framework realizes tachyon condensation without ghosts at the perturbative level, with applications for spontaneous symmetry breaking." @default.
- W4385227515 created "2023-07-25" @default.
- W4385227515 creator A5009033946 @default.
- W4385227515 date "2023-07-21" @default.
- W4385227515 modified "2023-09-24" @default.
- W4385227515 title "Exorcizing Ghosts from the Vacuum Spectra in String-Inspired Nonlocal Tachyon Condensation" @default.
- W4385227515 doi "https://doi.org/10.48550/arxiv.2307.11741" @default.
- W4385227515 hasPublicationYear "2023" @default.
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