Fresh Look at Neutrino Self-Interactions With the Lyman-$α$ Forest: Constraints from EFT and PRIYA Simulations
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866914048049676288 |
|---|---|
| author | He, Adam Ivanov, Mikhail M. Bird, Simeon An, Rui Gluscevic, Vera |
| author_facet | He, Adam Ivanov, Mikhail M. Bird, Simeon An, Rui Gluscevic, Vera |
| contents | We present the first search for evidence of neutrino self-interaction with two new, state-of-the-art likelihoods for eBOSS Lyman-$α$ data. These are an effective field theory (EFT) likelihood with priors from the Sherwood simulation suite, and a compressed likelihood derived from an emulator built using the PRIYA simulation suite. Previous analyses that combined Planck measurements with eBOSS Lyman-$α$ likelihoods based on earlier simulations found a preference for neutrino self-interactions. In contrast, using either of the new eBOSS Lyman-$α$ likelihoods, we find that a joint analysis with the cosmic microwave background (CMB) data from Planck prefers a negligible level of neutrino self-interaction, and derive new constraints on the neutrino self-coupling: $\mathrm{log}_{10}(G_\mathrm{eff} \ \mathrm{MeV}^2)=-5.57_{-0.58}^{+0.98}$ for Planck + EFT Lyman-$α$, and $\mathrm{log}_{10}(G_\mathrm{eff} \ \mathrm{MeV}^2)=-5.16_{-0.67}^{+1.12}$ for Planck + PRIYA Lyman-$α$, at 68% confidence. We also consider Planck in combination with DESI BAO data, and find that the latter does not provide significant constraining power for neutrino self-interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_15592 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fresh Look at Neutrino Self-Interactions With the Lyman-$α$ Forest: Constraints from EFT and PRIYA Simulations He, Adam Ivanov, Mikhail M. Bird, Simeon An, Rui Gluscevic, Vera Cosmology and Nongalactic Astrophysics We present the first search for evidence of neutrino self-interaction with two new, state-of-the-art likelihoods for eBOSS Lyman-$α$ data. These are an effective field theory (EFT) likelihood with priors from the Sherwood simulation suite, and a compressed likelihood derived from an emulator built using the PRIYA simulation suite. Previous analyses that combined Planck measurements with eBOSS Lyman-$α$ likelihoods based on earlier simulations found a preference for neutrino self-interactions. In contrast, using either of the new eBOSS Lyman-$α$ likelihoods, we find that a joint analysis with the cosmic microwave background (CMB) data from Planck prefers a negligible level of neutrino self-interaction, and derive new constraints on the neutrino self-coupling: $\mathrm{log}_{10}(G_\mathrm{eff} \ \mathrm{MeV}^2)=-5.57_{-0.58}^{+0.98}$ for Planck + EFT Lyman-$α$, and $\mathrm{log}_{10}(G_\mathrm{eff} \ \mathrm{MeV}^2)=-5.16_{-0.67}^{+1.12}$ for Planck + PRIYA Lyman-$α$, at 68% confidence. We also consider Planck in combination with DESI BAO data, and find that the latter does not provide significant constraining power for neutrino self-interactions. |
| title | Fresh Look at Neutrino Self-Interactions With the Lyman-$α$ Forest: Constraints from EFT and PRIYA Simulations |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2503.15592 |