From 100 kpc to 10 Gpc: Dark Matter self-interactions before and after DESI
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912484383784960 |
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| author | Bottaro, Salvatore Castorina, Emanuele Costa, Marco Redigolo, Diego Salvioni, Ennio |
| author_facet | Bottaro, Salvatore Castorina, Emanuele Costa, Marco Redigolo, Diego Salvioni, Ennio |
| contents | We consider Dark Matter self-interactions mediated by ultralight scalars. We show that effectively massless mediators lead to an enhancement of the matter power spectrum, while heavier mediators lead to a suppression, together with a feature around their Jeans scale. We derive the strongest present constraints by combining Planck and BOSS data. The recent DESI measurements of Baryon Acoustic Oscillations exhibit a mild $2σ$ preference for long-range self-interactions, as strong as $4$ per mille of the gravitational coupling. Full-shape analyses of forthcoming DESI and Euclid data will confirm or disprove such a hint. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_18252 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | From 100 kpc to 10 Gpc: Dark Matter self-interactions before and after DESI Bottaro, Salvatore Castorina, Emanuele Costa, Marco Redigolo, Diego Salvioni, Ennio Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology We consider Dark Matter self-interactions mediated by ultralight scalars. We show that effectively massless mediators lead to an enhancement of the matter power spectrum, while heavier mediators lead to a suppression, together with a feature around their Jeans scale. We derive the strongest present constraints by combining Planck and BOSS data. The recent DESI measurements of Baryon Acoustic Oscillations exhibit a mild $2σ$ preference for long-range self-interactions, as strong as $4$ per mille of the gravitational coupling. Full-shape analyses of forthcoming DESI and Euclid data will confirm or disprove such a hint. |
| title | From 100 kpc to 10 Gpc: Dark Matter self-interactions before and after DESI |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.18252 |