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- W4313447421 abstract "We show that vanishing of the sigma-model beta-functions for the metric $g_{munu}$, antisymmetric tensor $B_{munu}$ and dilaton $Phi$ of any string-theory model in $D$ dimensions at tree level can be obtained from a universal effective action, provided that the field combination $sqrt{-g}e^{-2Phi}$ is non-dynamical. The central-charge deficit term is omitted from the action and appears as an integration constant at the level of the field equations. The analysis is done at leading order in $alpha'$, i.e. at the two-derivative level in the effective description. It can be extended to incorporate higher order string-loop corrections, Ramond-Ramond forms and moduli fields. In all cases, the non-dynamical field combination turns out to be $sqrt{-g}, U$, where $U$ is the effective potential. When certain fluxes are fixed and the moduli fields are stabilized, no cosmological term will arise in the action. Instead, the cosmological constant will appear as an integration constant as in unimodular modifications of general relativity." @default.
- W4313447421 created "2023-01-06" @default.
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- W4313447421 date "2022-12-30" @default.
- W4313447421 modified "2023-09-23" @default.
- W4313447421 title "A unimodular-like string effective description" @default.
- W4313447421 doi "https://doi.org/10.48550/arxiv.2212.14659" @default.
- W4313447421 hasPublicationYear "2022" @default.
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