Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
- NázevTitle
- Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescopeDiffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- V. A. Allakhverdyan, A. D. Avrorin, A. V. Avrorin, V. M. Aynutdinov, L. Fajt, F. Šimkovic, I. Štekl
- Klíčová slovaKeywords
- high energy neutrino, search
- ExperimentCollaboration
- Baikal-GVD
- DOIDOI
- 10.1103/PhysRevD.107.042005
- Časopis / citaceJournal / citation
- Physical Review D 107(4), 042005 (2023) · ISSN 2470-0010
- RokYear
- 2023
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Inženýrské aplikace fyziky mikrosvětaEngineering applications of microworld physics; Institucionální podpora na rozvoj výzkumné org.Institucionální podpora na rozvoj výzkumné org.
- CitovánoCited by
- 98 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- https://arxiv.org/pdf/2211.09447
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
We report on the first observation of the diffuse cosmic neutrino flux with the Baikal-GVD neutrino telescope. Using cascadelike 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 3.05u. 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 yastro = 2.58 thorn 0.27 -0.33 and the flux normalization Oastro = 3.04 thorn 1.52 -1.21 per one flavor at 100 TeV.
We report on the first observation of the diffuse cosmic neutrino flux with the Baikal-GVD neutrino telescope. Using cascadelike 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 3.05u. 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 yastro = 2.58 thorn 0.27 -0.33 and the flux normalization Oastro = 3.04 thorn 1.52 -1.21 per one flavor at 100 TeV.