Ghost-free resummation of gravitational interactions of a 2-form gauge field
arXiv:1910.12508 · doi:10.1103/PhysRevD.101.024049
Abstract
We find that the recently-proposed ghost-free interaction of a 2-form gauge field in four dimensions, which contains derivative couplings in a nonperturbative manner, can be regarded as a resummation of ghostly interaction terms. We investigate the higher derivative structure of this model in a minisuperspace description and demonstrate that the higher derivative terms can be removed by taking appropriate combinations of the Euler-Lagrange equations, while a truncation at a finite order spoils this structure. We also show that this nature is peculiar to four dimensions.
arXiv comment7 pages; matches published version
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