IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data ICECUBE HIGH-ENERGY STARTING EVENT SAMPLE: ... ABBASI R. et al.

Teppei Katori

doi:https://doi.org/10.1103/PhysRevD.104.022002

IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data ICECUBE HIGH-ENERGY STARTING EVENT SAMPLE: ... ABBASI R. et al.

Teppei Katori

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166 Citations (Scopus)

Abstract

The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux of astrophysical origin. This discovery was made using events interacting within a fiducial region of the detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as the high-energy starting event sample (HESE). We revisit the analysis of the HESE sample with an additional 4.5 years of data, newer glacial ice models, and improved systematics treatment. This paper describes the sample in detail, reports on the latest astrophysical neutrino flux measurements, and presents a source search for astrophysical neutrinos. We give the compatibility of these observations with specific isotropic flux models proposed in the literature as well as generic power-law-like scenarios. Assuming νe:νμ:ντ=1:1:1, and an equal flux of neutrinos and antineutrinos, we find that the astrophysical neutrino spectrum is compatible with an unbroken power law, with a preferred spectral index of 2.87-0.19+0.20 for the 68% confidence interval.

Original language	English
Article number	022002
Journal	Physical Review D
Volume	104
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevD.104.022002
Publication status	Published - 15 Jul 2021

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https://doi.org/10.1103/PhysRevD.104.022002

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@article{2e341c1ec646481c92460cf97f7e2058,

title = "IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data ICECUBE HIGH-ENERGY STARTING EVENT SAMPLE: ... ABBASI R. et al.",

abstract = "The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux of astrophysical origin. This discovery was made using events interacting within a fiducial region of the detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as the high-energy starting event sample (HESE). We revisit the analysis of the HESE sample with an additional 4.5 years of data, newer glacial ice models, and improved systematics treatment. This paper describes the sample in detail, reports on the latest astrophysical neutrino flux measurements, and presents a source search for astrophysical neutrinos. We give the compatibility of these observations with specific isotropic flux models proposed in the literature as well as generic power-law-like scenarios. Assuming νe:νμ:ντ=1:1:1, and an equal flux of neutrinos and antineutrinos, we find that the astrophysical neutrino spectrum is compatible with an unbroken power law, with a preferred spectral index of 2.87-0.19+0.20 for the 68% confidence interval.",

author = "Teppei Katori",

note = "Funding Information: The IceCube Collaboration acknowledges the significant contributions to this manuscript from Carlos Arg{\"u}elles, Austin Schneider, Juliana Stachurska, and Tianlu Yuan. We acknowledge the support from the following agencies: U.S. National Science Foundation-Office of Polar Programs, U.S. National Science Foundation-Physics Division, Wisconsin Alumni Research Foundation, Center for High Throughput Computing (CHTC) at the University of Wisconsin–Madison, Open Science Grid (OSG), Extreme Science and Engineering Discovery Environment (XSEDE), Frontera computing project at the Texas Advanced Computing Center, U.S. Department of Energy–National Energy Research Scientific Computing Center, Particle Astrophysics Research Computing Center at the University of Maryland, Institute for Cyber-Enabled Research at Michigan State University, and Astroparticle Physics Computational Facility at Marquette University (United States); Funds for Scientific Research (FRS-FNRS and FWO), FWO Odysseus and Big Science programs, and Belgian Federal Science Policy Office (Belspo) (Belgium); Bundesministerium f{\"u}r Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Helmholtz Alliance for Astroparticle Physics (HAP), Initiative and Networking Fund of the Helmholtz Association, Deutsches Elektronen Synchrotron (DESY), and High Performance Computing cluster of the RWTH Aachen (Germany); Swedish Research Council, Swedish Polar Research Secretariat, Swedish National Infrastructure for Computing (SNIC), and Knut and Alice Wallenberg Foundation (Sweden); Australian Research Council (Australia); Natural Sciences and Engineering Research Council of Canada, Calcul Qu{\'e}bec, Compute Ontario, Canada Foundation for Innovation, WestGrid, and Compute Canada (Canada); Villum Fonden, Danish National Research Foundation (DNRF), Carlsberg Foundation (Denmark); Marsden Fund (New Zealand); Japan Society for Promotion of Science (JSPS) and Institute for Global Prominent Research (IGPR) of Chiba University (Japan); National Research Foundation of Korea (NRF) (Korea); Swiss National Science Foundation (SNSF) (Switzerland); Department of Physics, University of Oxford; United Kingdom–Science and Technology Facilities Council (STFC) and The Royal Society (United Kingdom). Publisher Copyright: {\textcopyright} 2021 American Physical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

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doi = "https://doi.org/10.1103/PhysRevD.104.022002",

language = "English",

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journal = "Physical Review D",

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T2 - Description and flux characterization with 7.5 years of data ICECUBE HIGH-ENERGY STARTING EVENT SAMPLE: ... ABBASI R. et al.

AU - Katori, Teppei

N1 - Funding Information: The IceCube Collaboration acknowledges the significant contributions to this manuscript from Carlos Argüelles, Austin Schneider, Juliana Stachurska, and Tianlu Yuan. We acknowledge the support from the following agencies: U.S. National Science Foundation-Office of Polar Programs, U.S. National Science Foundation-Physics Division, Wisconsin Alumni Research Foundation, Center for High Throughput Computing (CHTC) at the University of Wisconsin–Madison, Open Science Grid (OSG), Extreme Science and Engineering Discovery Environment (XSEDE), Frontera computing project at the Texas Advanced Computing Center, U.S. Department of Energy–National Energy Research Scientific Computing Center, Particle Astrophysics Research Computing Center at the University of Maryland, Institute for Cyber-Enabled Research at Michigan State University, and Astroparticle Physics Computational Facility at Marquette University (United States); Funds for Scientific Research (FRS-FNRS and FWO), FWO Odysseus and Big Science programs, and Belgian Federal Science Policy Office (Belspo) (Belgium); Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Helmholtz Alliance for Astroparticle Physics (HAP), Initiative and Networking Fund of the Helmholtz Association, Deutsches Elektronen Synchrotron (DESY), and High Performance Computing cluster of the RWTH Aachen (Germany); Swedish Research Council, Swedish Polar Research Secretariat, Swedish National Infrastructure for Computing (SNIC), and Knut and Alice Wallenberg Foundation (Sweden); Australian Research Council (Australia); Natural Sciences and Engineering Research Council of Canada, Calcul Québec, Compute Ontario, Canada Foundation for Innovation, WestGrid, and Compute Canada (Canada); Villum Fonden, Danish National Research Foundation (DNRF), Carlsberg Foundation (Denmark); Marsden Fund (New Zealand); Japan Society for Promotion of Science (JSPS) and Institute for Global Prominent Research (IGPR) of Chiba University (Japan); National Research Foundation of Korea (NRF) (Korea); Swiss National Science Foundation (SNSF) (Switzerland); Department of Physics, University of Oxford; United Kingdom–Science and Technology Facilities Council (STFC) and The Royal Society (United Kingdom). Publisher Copyright: © 2021 American Physical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/7/15

Y1 - 2021/7/15

N2 - The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux of astrophysical origin. This discovery was made using events interacting within a fiducial region of the detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as the high-energy starting event sample (HESE). We revisit the analysis of the HESE sample with an additional 4.5 years of data, newer glacial ice models, and improved systematics treatment. This paper describes the sample in detail, reports on the latest astrophysical neutrino flux measurements, and presents a source search for astrophysical neutrinos. We give the compatibility of these observations with specific isotropic flux models proposed in the literature as well as generic power-law-like scenarios. Assuming νe:νμ:ντ=1:1:1, and an equal flux of neutrinos and antineutrinos, we find that the astrophysical neutrino spectrum is compatible with an unbroken power law, with a preferred spectral index of 2.87-0.19+0.20 for the 68% confidence interval.

AB - The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux of astrophysical origin. This discovery was made using events interacting within a fiducial region of the detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as the high-energy starting event sample (HESE). We revisit the analysis of the HESE sample with an additional 4.5 years of data, newer glacial ice models, and improved systematics treatment. This paper describes the sample in detail, reports on the latest astrophysical neutrino flux measurements, and presents a source search for astrophysical neutrinos. We give the compatibility of these observations with specific isotropic flux models proposed in the literature as well as generic power-law-like scenarios. Assuming νe:νμ:ντ=1:1:1, and an equal flux of neutrinos and antineutrinos, we find that the astrophysical neutrino spectrum is compatible with an unbroken power law, with a preferred spectral index of 2.87-0.19+0.20 for the 68% confidence interval.

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DO - https://doi.org/10.1103/PhysRevD.104.022002

M3 - Article

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VL - 104

JO - Physical Review D

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IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data ICECUBE HIGH-ENERGY STARTING EVENT SAMPLE: ... ABBASI R. et al.

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