Developing a Theoretical Model for the Resummation of Infrared Effects in the Pre- and Post-Reconstruction Galaxy Bispectra (https://youtu.be/bHdlIi3jQ4A)
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866909152318586880 |
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| author | Sugiyama, Naonori |
| author_facet | Sugiyama, Naonori |
| contents | While substantial progress has been made in studying the pre-reconstruction galaxy bispectrum, investigations of the post-reconstruction bispectrum are still in nascent stages. In this paper, we present a bispectrum model that incorporates one-loop corrections in the Standard Perturbation Theory (SPT), while simultaneously addressing infrared (IR) effects in the post-reconstruction density fluctuations in a non-perturbative approach. This model accurately captures the nonlinear behavior of the Baryon Acoustic Oscillation (BAO) signal within the post-reconstruction bispectrum framework. Furthermore, the incorporation of the one-loop correction extends its applicability to smaller scales. Given that the approach to addressing IR effects remains invariant before and after the reconstruction process, the resulting IR-resummed bispectrum model exhibits uniformity across both scenarios. Throughout this analysis, we achieve a comprehensive and unified description of the bispectrum that seamlessly spans the pre- and post-reconstruction phases. An explanatory video is available at https://youtu.be/bHdlIi3jQ4A. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_18262 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Developing a Theoretical Model for the Resummation of Infrared Effects in the Pre- and Post-Reconstruction Galaxy Bispectra (https://youtu.be/bHdlIi3jQ4A) Sugiyama, Naonori Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology While substantial progress has been made in studying the pre-reconstruction galaxy bispectrum, investigations of the post-reconstruction bispectrum are still in nascent stages. In this paper, we present a bispectrum model that incorporates one-loop corrections in the Standard Perturbation Theory (SPT), while simultaneously addressing infrared (IR) effects in the post-reconstruction density fluctuations in a non-perturbative approach. This model accurately captures the nonlinear behavior of the Baryon Acoustic Oscillation (BAO) signal within the post-reconstruction bispectrum framework. Furthermore, the incorporation of the one-loop correction extends its applicability to smaller scales. Given that the approach to addressing IR effects remains invariant before and after the reconstruction process, the resulting IR-resummed bispectrum model exhibits uniformity across both scenarios. Throughout this analysis, we achieve a comprehensive and unified description of the bispectrum that seamlessly spans the pre- and post-reconstruction phases. An explanatory video is available at https://youtu.be/bHdlIi3jQ4A. |
| title | Developing a Theoretical Model for the Resummation of Infrared Effects in the Pre- and Post-Reconstruction Galaxy Bispectra (https://youtu.be/bHdlIi3jQ4A) |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2403.18262 |