Tensor bispectrum mediated by an excited scalar field during inflation
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914937136218112 |
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| author | Peng, Zhi-Zhang Fang, Cheng-Jun Guo, Zong-Kuan |
| author_facet | Peng, Zhi-Zhang Fang, Cheng-Jun Guo, Zong-Kuan |
| contents | We calculate the tensor bispectrum mediated by an excited scalar field during inflation and find that the bispectrum peaks in the squeezed configuration, which is different from that of gravitational waves induced by enhanced curvature perturbations re-entering the horizon in the radiation-dominated era. Measuring the bispectrum provides a promising way to distinguish the stochastic gravitational-wave background generated during inflation from that generated after inflation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_04617 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tensor bispectrum mediated by an excited scalar field during inflation Peng, Zhi-Zhang Fang, Cheng-Jun Guo, Zong-Kuan Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory We calculate the tensor bispectrum mediated by an excited scalar field during inflation and find that the bispectrum peaks in the squeezed configuration, which is different from that of gravitational waves induced by enhanced curvature perturbations re-entering the horizon in the radiation-dominated era. Measuring the bispectrum provides a promising way to distinguish the stochastic gravitational-wave background generated during inflation from that generated after inflation. |
| title | Tensor bispectrum mediated by an excited scalar field during inflation |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2403.04617 |