A Non-linear Massive Gravity Theory of Geometric Origin
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912199791869952 |
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| author | Damour, Thibault Jain, Tamanna |
| author_facet | Damour, Thibault Jain, Tamanna |
| contents | We study the number of propagating degrees of freedom, at non-linear order, in torsion gravity theories, a class of modified theories of gravity that include a propagating torsion in addition to the metric. We focus on a three-parameter subfamily of theories (``torsion bigravity") that contains, at linear order, only two physical excitations: a massless spin-2 one (with two degrees of freedom) and a massive spin-2 one (with five degrees of freedom). We study the dynamics of the massive spin-2 field in the limit where the torsion field decouples from the metric. The number of degrees of freedom of the torsion field is found to {\it change, at non-linear order, from five to nine}. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_13077 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Non-linear Massive Gravity Theory of Geometric Origin Damour, Thibault Jain, Tamanna General Relativity and Quantum Cosmology High Energy Physics - Theory We study the number of propagating degrees of freedom, at non-linear order, in torsion gravity theories, a class of modified theories of gravity that include a propagating torsion in addition to the metric. We focus on a three-parameter subfamily of theories (``torsion bigravity") that contains, at linear order, only two physical excitations: a massless spin-2 one (with two degrees of freedom) and a massive spin-2 one (with five degrees of freedom). We study the dynamics of the massive spin-2 field in the limit where the torsion field decouples from the metric. The number of degrees of freedom of the torsion field is found to {\it change, at non-linear order, from five to nine}. |
| title | A Non-linear Massive Gravity Theory of Geometric Origin |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2501.13077 |