Massive neutrinos and interacting dark matter look alike through the lens of lensing
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_ | 1866910208426508288 |
|---|---|
| author | Anchordoqui, Luis A. Marfatia, Danny Soriano, Jorge F. |
| author_facet | Anchordoqui, Luis A. Marfatia, Danny Soriano, Jorge F. |
| contents | We demonstrate that the suppression in the lensing power spectrum of the cosmic microwave background (CMB) caused by massive neutrinos can be mimicked by dark matter-baryon interactions at the precision of next-generation CMB experiments. Thus, a determination of neutrino masses from the CMB lensing power spectrum may be compromised. We illustrate the degeneracy for a dark matter-proton cross section $\propto v^{-4}$, which arises in the $t$-channel exchange of an ultralight mediator in the nonrelativistic limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01048 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Massive neutrinos and interacting dark matter look alike through the lens of lensing Anchordoqui, Luis A. Marfatia, Danny Soriano, Jorge F. Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment High Energy Physics - Phenomenology We demonstrate that the suppression in the lensing power spectrum of the cosmic microwave background (CMB) caused by massive neutrinos can be mimicked by dark matter-baryon interactions at the precision of next-generation CMB experiments. Thus, a determination of neutrino masses from the CMB lensing power spectrum may be compromised. We illustrate the degeneracy for a dark matter-proton cross section $\propto v^{-4}$, which arises in the $t$-channel exchange of an ultralight mediator in the nonrelativistic limit. |
| title | Massive neutrinos and interacting dark matter look alike through the lens of lensing |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.01048 |