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PreprintarXiv licencearXiv

Seesaw and Axion in No-Scale Gravity

  • Anamaria Hell
  • Lincoln da S. Pereira
  • Tsutomu T. Yanagida
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Abstract

The No-Scale gravity is a compelling framework to describe particle physics, gravity and cosmology, in which all mass scales are an illusion given by the value of a scalar field ϕ. This theory, however, falls under the umbrella of more general scalar-tensor theories, which propagate different modes depending on the scalar field, and faces the extensive debate regarding the equivalence between its Jordan and Einstein frame descriptions. In this work we advocate that by excluding the singular point in the transformation between the two frames (e.g., ϕ=0) we can have the classical equivalence between them. To show the merit of removing this singular point, we argue the Jordan frame makes the symmetries of the model manifest, which creates a suitable playground for the particle-physics model building which we illustrate by showing the emergence of discrete symmetries which leads to a high-quality axion and also naturally incorporate the seesaw mechanism.

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Cite

BibTeXRIS
BibTeX
@misc{hell2026seesaw,
  title = {{Seesaw and Axion in No-Scale Gravity}},
  author = {Anamaria Hell and Lincoln da S. Pereira and Tsutomu T. Yanagida},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2608.29801},
  eprint = {2608.29801},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.29801},
}
RIS
TY  - UNPB
TI  - Seesaw and Axion in No-Scale Gravity
AU  - Anamaria Hell
AU  - Lincoln da S. Pereira
AU  - Tsutomu T. Yanagida
PY  - 2026
DA  - 2026/09/06
PB  - arXiv
DO  - 10.48550/arxiv.2608.29801
UR  - https://arxiv.org/abs/2608.29801
AB  - The No-Scale gravity is a compelling framework to describe particle physics, gravity and cosmology, in which all mass scales are an illusion given by the value of a scalar field ϕ. This theory, however, falls under the umbrella of more general scalar-tensor theories, which propagate different modes depending on the scalar field, and faces the extensive debate regarding the equivalence between its Jordan and Einstein frame descriptions. In this work we advocate that by excluding the singular point in the transformation between the two frames (e.g., ϕ=0) we can have the classical equivalence between them. To show the merit of removing this singular point, we argue the Jordan frame makes the symmetries of the model manifest, which creates a suitable playground for the particle-physics model building which we illustrate by showing the emergence of discrete symmetries which leads to a high-quality axion and also naturally incorporate the seesaw mechanism.
ER  -