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Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
- Source :
- Phys.Rev.D 107 (2023) 4, 042005
- Publication Year :
- 2022
-
Abstract
- We report on the first observation of the diffuse cosmic neutrino flux with the Baikal-GVD neutrino telescope. Using cascade-like events collected by Baikal-GVD in 2018--2021, a significant excess of events over the expected atmospheric background is observed. This excess is consistent with the high-energy diffuse cosmic neutrino flux observed by IceCube. The null cosmic flux assumption is rejected with a significance of 3.05$\sigma$. Assuming a single power law model of the astrophysical neutrino flux with identical contribution from each neutrino flavor, the following best-fit parameter values are found: the spectral index $\gamma_{astro}$ = $2.58^{+0.27}_{-0.33}$ and the flux normalization $\phi_{astro}$ = 3.04$^{+1.52}_{-1.21}$ per one flavor at 100 TeV.<br />Comment: 9 pages; 5 figures; 2 tables
- Subjects :
- Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.D 107 (2023) 4, 042005
- Publication Type :
- Report
- Accession number :
- edsarx.2211.09447
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.107.042005