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| Format: | Preprint |
| Veröffentlicht: |
2026
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| Online-Zugang: | https://arxiv.org/abs/2601.16277 |
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| _version_ | 1866914274904899584 |
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| author | Gorbunov, Dmitry Nedelko, Nikita |
| author_facet | Gorbunov, Dmitry Nedelko, Nikita |
| contents | We present constraints on the sum of neutrino masses $\sum m_ν$ from a dataset incorporating the full SPT-3G 2018 TT/TE/EE+lensing spectra together with Planck PR4 lensing and low-$\ell$ parts of the Planck PR3 spectra. Using it as a baseline for the DESI DR2 BAO measurements, we arrive at a $95\%$ upper limit of $\sum m_ν< 0.11$ eV, relaxing the tension between $\rm Λ$CDM and lower bounds on $\sum m_ν$ based on neutrino oscillation experiments. When including DES Y1 weak lensing information and the Pantheon+ SNIa catalog, the limit is further loosened to $\sum m_ν<0.138$ eV with a slight preference for $\sum m_ν>0$. On contrast, replacing SPT-3G 2018 primary CMB and lensing spectra with ones from the SPT-3G 2019-2020 (D1) release tightens the overall constraint to $<0.082$ eV and pushes the $\sum m_ν$ posterior mode value to zero, indicating a preference for quasi-negative neutrino masses in line with the D1 analysis. This is a curious shift within SPT-3G measurements of the same field taken in 2018 and in 2019-2020 and processed with different analysis pipelines. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_16277 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Relaxing DESI DR2 BAO Constraints on $\sum m_ν$ with Planck and SPT-3G 2018 in the Context of SPT D1 Gorbunov, Dmitry Nedelko, Nikita Cosmology and Nongalactic Astrophysics We present constraints on the sum of neutrino masses $\sum m_ν$ from a dataset incorporating the full SPT-3G 2018 TT/TE/EE+lensing spectra together with Planck PR4 lensing and low-$\ell$ parts of the Planck PR3 spectra. Using it as a baseline for the DESI DR2 BAO measurements, we arrive at a $95\%$ upper limit of $\sum m_ν< 0.11$ eV, relaxing the tension between $\rm Λ$CDM and lower bounds on $\sum m_ν$ based on neutrino oscillation experiments. When including DES Y1 weak lensing information and the Pantheon+ SNIa catalog, the limit is further loosened to $\sum m_ν<0.138$ eV with a slight preference for $\sum m_ν>0$. On contrast, replacing SPT-3G 2018 primary CMB and lensing spectra with ones from the SPT-3G 2019-2020 (D1) release tightens the overall constraint to $<0.082$ eV and pushes the $\sum m_ν$ posterior mode value to zero, indicating a preference for quasi-negative neutrino masses in line with the D1 analysis. This is a curious shift within SPT-3G measurements of the same field taken in 2018 and in 2019-2020 and processed with different analysis pipelines. |
| title | Relaxing DESI DR2 BAO Constraints on $\sum m_ν$ with Planck and SPT-3G 2018 in the Context of SPT D1 |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2601.16277 |