New shape for cross-bispectra in Chern-Simons gravity
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866910605168869376 |
|---|---|
| author | Christodoulidis, Perseas Gong, Jinn-Ouk Lin, Wei-Chen Mylova, Maria Sasaki, Misao |
| author_facet | Christodoulidis, Perseas Gong, Jinn-Ouk Lin, Wei-Chen Mylova, Maria Sasaki, Misao |
| contents | Chern-Simons gravity is known to suffer from graviton ghost production during inflation, which suppresses the parity-violating power spectrum at scales relevant to cosmic microwave background observations. In this work, we show that allowing the initial conditions of inflation to deviate from the standard Bunch-Davies state can enhance parity-violating non-Gaussianity in the scalar-tensor cross-bispectra. Our results reveal a significant additional contribution to the cross-bispectra in the flattened configuration, offering a new avenue to constrain parity-violating gravity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_09935 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | New shape for cross-bispectra in Chern-Simons gravity Christodoulidis, Perseas Gong, Jinn-Ouk Lin, Wei-Chen Mylova, Maria Sasaki, Misao High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Chern-Simons gravity is known to suffer from graviton ghost production during inflation, which suppresses the parity-violating power spectrum at scales relevant to cosmic microwave background observations. In this work, we show that allowing the initial conditions of inflation to deviate from the standard Bunch-Davies state can enhance parity-violating non-Gaussianity in the scalar-tensor cross-bispectra. Our results reveal a significant additional contribution to the cross-bispectra in the flattened configuration, offering a new avenue to constrain parity-violating gravity. |
| title | New shape for cross-bispectra in Chern-Simons gravity |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2409.09935 |