Technically Natural Suppression of Fifth Force
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910156982321152 |
|---|---|
| author | Homma, Kensuke Katsuragawa, Taishi Matsuzaki, Shinya |
| author_facet | Homma, Kensuke Katsuragawa, Taishi Matsuzaki, Shinya |
| contents | Light scalars generically mediate a fifth force incompatible with local tests of gravity unless their couplings are parametrically suppressed or screening mechanisms are introduced. We demonstrate that such suppression can arise from symmetry. We propose a $Z_2$-symmetric mirror extension of the Standard Model within a bi-conformal gravity construction, where spontaneous breaking of scale invariance produces a light scalaron as a pseudo-Nambu-Goldstone boson. This scalaron couples to the difference of trace anomalies between the Standard Model and mirror sectors. We find a parameter-independent correlation between the fifth-force strength $α$ and the scalaron mass $m_σ$, with the proportionality set by QCD observables and the electroweak scale. The Standard Model predicts $α\sim 10^{-4}$ at meter scales for $m_σ\sim 10^{-7}$ eV, which is directly in the target window of next-generation experiments. In contrast to environmental screening mechanisms, this suppression mechanism follows directly from symmetry rather than nonlinear scalar dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_20292 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Technically Natural Suppression of Fifth Force Homma, Kensuke Katsuragawa, Taishi Matsuzaki, Shinya High Energy Physics - Phenomenology General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Theory Light scalars generically mediate a fifth force incompatible with local tests of gravity unless their couplings are parametrically suppressed or screening mechanisms are introduced. We demonstrate that such suppression can arise from symmetry. We propose a $Z_2$-symmetric mirror extension of the Standard Model within a bi-conformal gravity construction, where spontaneous breaking of scale invariance produces a light scalaron as a pseudo-Nambu-Goldstone boson. This scalaron couples to the difference of trace anomalies between the Standard Model and mirror sectors. We find a parameter-independent correlation between the fifth-force strength $α$ and the scalaron mass $m_σ$, with the proportionality set by QCD observables and the electroweak scale. The Standard Model predicts $α\sim 10^{-4}$ at meter scales for $m_σ\sim 10^{-7}$ eV, which is directly in the target window of next-generation experiments. In contrast to environmental screening mechanisms, this suppression mechanism follows directly from symmetry rather than nonlinear scalar dynamics. |
| title | Technically Natural Suppression of Fifth Force |
| topic | High Energy Physics - Phenomenology General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Theory |
| url | https://arxiv.org/abs/2604.20292 |