Gravitational Waves from Kinetic Preheating
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866910343558594560 |
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| author | Adshead, Peter Giblin Jr, John T. Tishue, Avery |
| author_facet | Adshead, Peter Giblin Jr, John T. Tishue, Avery |
| contents | We study gravitational wave production during kinetic preheating after inflation with a focus on scenarios that arise in $α$-attractor models where a scalar dilaton-like inflaton is kinetically coupled to a second scalar field. We present high-resolution lattice simulations of three $α$-attractor models for a range of parameters to probe regions where preheating is efficient. We find that preheating in these models can be extremely violent, resulting in gravitational wave energy densities that can be constrained by cosmic microwave background measurements of the effective number of relativistic species, $N_{\rm eff}$ |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_16152 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational Waves from Kinetic Preheating Adshead, Peter Giblin Jr, John T. Tishue, Avery Cosmology and Nongalactic Astrophysics We study gravitational wave production during kinetic preheating after inflation with a focus on scenarios that arise in $α$-attractor models where a scalar dilaton-like inflaton is kinetically coupled to a second scalar field. We present high-resolution lattice simulations of three $α$-attractor models for a range of parameters to probe regions where preheating is efficient. We find that preheating in these models can be extremely violent, resulting in gravitational wave energy densities that can be constrained by cosmic microwave background measurements of the effective number of relativistic species, $N_{\rm eff}$ |
| title | Gravitational Waves from Kinetic Preheating |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.16152 |