Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Braglia, Matteo Calcagni, Gianluca Franciolini, Gabriele Fumagalli, Jacopo Nardini, Germano Peloso, Marco Pieroni, Mauro Renaux-Petel, Sébastien Ricciardone, Angelo Tasinato, Gianmassimo Vaskonen, Ville |
| author_facet | Braglia, Matteo Calcagni, Gianluca Franciolini, Gabriele Fumagalli, Jacopo Nardini, Germano Peloso, Marco Pieroni, Mauro Renaux-Petel, Sébastien Ricciardone, Angelo Tasinato, Gianmassimo Vaskonen, Ville |
| contents | Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template databank to describe well-motivated signals from inflation, prototype their template-based searches, and forecast their reconstruction with LISA. Specifically, we classify seven templates based on their signal frequency shape, and we identify representative fundamental physics models leading to them. By running a template-based analysis, we forecast the accuracy with which LISA can reconstruct the template parameters of representative benchmark signals, with and without galactic and extragalactic foregrounds. We identify the parameter regions that can be probed by LISA within each template. Finally, we investigate how our signal reconstructions shed light on fundamental physics models of inflation: we discuss their impact for measurements of \emph{e.g.,} ~the couplings of inflationary axions to gauge fields; the graviton mass during inflation; the fluctuation seeds of primordial black holes; the consequences of excited states during inflation, and the presence of small-scale spectral features. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_04356 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation Braglia, Matteo Calcagni, Gianluca Franciolini, Gabriele Fumagalli, Jacopo Nardini, Germano Peloso, Marco Pieroni, Mauro Renaux-Petel, Sébastien Ricciardone, Angelo Tasinato, Gianmassimo Vaskonen, Ville Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template databank to describe well-motivated signals from inflation, prototype their template-based searches, and forecast their reconstruction with LISA. Specifically, we classify seven templates based on their signal frequency shape, and we identify representative fundamental physics models leading to them. By running a template-based analysis, we forecast the accuracy with which LISA can reconstruct the template parameters of representative benchmark signals, with and without galactic and extragalactic foregrounds. We identify the parameter regions that can be probed by LISA within each template. Finally, we investigate how our signal reconstructions shed light on fundamental physics models of inflation: we discuss their impact for measurements of \emph{e.g.,} ~the couplings of inflationary axions to gauge fields; the graviton mass during inflation; the fluctuation seeds of primordial black holes; the consequences of excited states during inflation, and the presence of small-scale spectral features. |
| title | Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2407.04356 |