- Collection:
- Clark Atlanta University Faculty Publications
- Title:
- Improved Characterization of the Astrophysical Muon-Neutrino Flux with 9.5 Years of IceCube Data
- Creator:
- Abbasi, Rezvan, Department of Physics, Loyola University Chicago
Japaridze, George, CTSPS, Clark-Atlanta University - Date of Original:
- 2022-03
- Subject:
- African Americans--Education (Higher)--Georgia
Clark Atlanta University - Location:
- United States, Georgia, Fulton County, Atlanta, 33.749, -84.38798
- Medium:
- articles
- Type:
- Text
- Format:
- application/pdf
- Description:
- 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 � f = � n n + - m m + - - -- - @100TeV 1.44 10 GeV cm s sr 0.26 0.25 18 1 2 1 1 and a spectral index g = - + 2.37 SPL 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 twosigma level
- External Identifiers:
- Metadata URL:
- http://hdl.handle.net/20.500.12322/cau.ir:2022_abbasi_rezvan_george_japaridze_3
- Rights Holder:
- Clark Atlanta University
- Original Collection:
- The Astrophysical Journal
- Holding Institution:
- Atlanta University Center Robert W. Woodruff Library
- Rights:
-
