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- W4384007505 abstract "We explore the decoupling of massive ghost mode in the $4D$ (four-dimensional) theory of the conformal factor of the metric. The model was introduced by Antoniadis and Mottola in [1] and can be regarded as a close analog of the fourth-derivative quantum gravity. The analysis of the derived one-loop nonlocal form factors includes their asymptotic behavior in the UV and IR limits. In the UV (high energy) domain, our results reproduce the Minimal Subtraction scheme-based beta functions of [1]. In the IR (i.e., at low energies), the diagrams with massive ghost internal lines collapse into tadpole-type graphs without nonlocal contributions and become irrelevant. On the other hand, those structures that contribute to the running of parameters of the action and survive in the IR, are well-correlated with the divergent part (or the leading in UV contributions to the form factors), coming from the effective low-energy theory of the conformal factor. This effective theory describes only the light propagating mode. Finally, we discuss whether these results may shed light on the possible running of the cosmological constant at low energies." @default.
- W4384007505 created "2023-07-13" @default.
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- W4384007505 date "2023-07-12" @default.
- W4384007505 modified "2023-09-25" @default.
- W4384007505 title "Effective approach to the Antoniadis-Mottola model: quantum decoupling of the higher derivative terms" @default.
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- W4384007505 doi "https://doi.org/10.1007/jhep07(2023)097" @default.
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