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Improved Characterization of the Astrophysical Muon-neutrino Flux with 9.5 Years of IceCube Data

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dc.contributor.authorAbbasi, R.
dc.contributor.authorAckermann, M.
dc.contributor.authorAdams, J.
dc.contributor.authorAguilar, J. A.
dc.contributor.authorBesson, D. Z.
dc.date.accessioned2024-12-26T11:08:27Z
dc.date.available2024-12-26T11:08:27Z
dc.date.issued2022
dc.description.abstract© 2022. The Author(s). Published by the American Astronomical Society.We present a measurement of the high-energy astrophysical muon-neutrino flux with the IceCube Neutrino Observatory. The measurement uses a high-purity selection of 650k neutrino-induced muon tracks from the northern celestial hemisphere, corresponding to 9.5 yr of experimental data. With respect to previous publications, the measurement is improved by the increased size of the event sample and the extended model testing beyond simple power-law hypotheses. An updated treatment of systematic uncertainties and atmospheric background fluxes has been implemented based on recent models. The best-fit single power-law parameterization for the astrophysical energy spectrum results in a normalization of φ@100TeVνμ+ν¯μ=1.44-0.26+0.25×10-18GeV-1cm-2s-1sr-1 and a spectral index γSPL=2.37-0.09+0.09, constrained in the energy range from 15 TeV to 5 PeV. The model tests include a single power law with a spectral cutoff at high energies, a log-parabola model, several source-class-specific flux predictions from the literature, and a model-independent spectral unfolding. The data are consistent with a single power-law hypothesis, however, spectra with softening above one PeV are statistically more favorable at a two-sigma level.
dc.identifier.citationImproved Characterization of the Astrophysical Muon-neutrino Flux with 9.5 Years of IceCube Data / Abbasi, R. [et al.] // Astrophysical Journal. - 2022. - 928. - № 1. - 10.3847/1538-4357/ac4d29
dc.identifier.doi10.3847/1538-4357/ac4d29
dc.identifier.urihttps://www.doi.org/10.3847/1538-4357/ac4d29
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85128155836&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000780370800001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/28991
dc.relation.ispartofAstrophysical Journal
dc.titleImproved Characterization of the Astrophysical Muon-neutrino Flux with 9.5 Years of IceCube Data
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue1
oaire.citation.volume928
relation.isOrgUnitOfPublicationba0b4738-e6bd-4285-bda5-16ab2240dbd1
relation.isOrgUnitOfPublication.latestForDiscoveryba0b4738-e6bd-4285-bda5-16ab2240dbd1
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