Linearized transverse diffeomorphism invariant spin-2 theories via gauge invariants
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866910159736930304 |
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| author | Dalmazi, D. Ramos, Luiz G. M. |
| author_facet | Dalmazi, D. Ramos, Luiz G. M. |
| contents | We analyze the particle spectrum of a second-order (in derivatives) theory based on a rank-2 tensor field with both symmetric and antisymmetric components. By demanding the existence of a propagating massless spin-2 particle and invariance under linearized transverse diffeomorphisms, we derive a new class of stable models with two massless scalars and a single massless spin-2 particle. A natural non linear completion is proposed in terms of a dynamical metric field. The identification of the spectrum is carried out using a fully Lagrangian, gauge-invariant approach which makes use of Bardeen variables in a constructive manner. The approach significantly reduces the number of steps in the spectrum determination in some cases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_24047 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Linearized transverse diffeomorphism invariant spin-2 theories via gauge invariants Dalmazi, D. Ramos, Luiz G. M. High Energy Physics - Theory We analyze the particle spectrum of a second-order (in derivatives) theory based on a rank-2 tensor field with both symmetric and antisymmetric components. By demanding the existence of a propagating massless spin-2 particle and invariance under linearized transverse diffeomorphisms, we derive a new class of stable models with two massless scalars and a single massless spin-2 particle. A natural non linear completion is proposed in terms of a dynamical metric field. The identification of the spectrum is carried out using a fully Lagrangian, gauge-invariant approach which makes use of Bardeen variables in a constructive manner. The approach significantly reduces the number of steps in the spectrum determination in some cases. |
| title | Linearized transverse diffeomorphism invariant spin-2 theories via gauge invariants |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2506.24047 |