Time-Integrated Southern-Sky Neutrino Source Searches with 10 Years of IceCube Starting-Track Events at Energies Down to 1 TeV

R. Abbasi; M. Ackermann; J. Adams; S. K. Agarwalla; J. A. Aguilar; M. Ahlers; J M Alameddine; N. M. Amin; M Hostert; IceCube Collaboration

doi:10.48550/arxiv.2501.16440

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Time-Integrated Southern-Sky Neutrino Source Searches with 10 Years of IceCube Starting-Track Events at Energies Down to 1 TeV

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Time-Integrated Southern-Sky Neutrino Source Searches with 10 Years of IceCube Starting-Track Events at Energies Down to 1 TeV

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla, J. A. Aguilar, M. Ahlers, J M Alameddine, N. M. Amin, M Hostert and IceCube Collaboration

ArXiv.org

Cornell University

01/27/2025

DOI: 10.48550/arxiv.2501.16440

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Published (Version of record)This preprint has not been evaluated by subject experts through peer review. Preprints may undergo extensive changes and/or become peer-reviewed journal articles. Open Access

Abstract

In the IceCube Neutrino Observatory, a signal of astrophysical neutrinos is obscured by backgrounds from atmospheric neutrinos and muons produced in cosmic-ray interactions. IceCube event selections used to isolate the astrophysical neutrino signal often focus on t/he morphology of the light patterns recorded by the detector. The analyses presented here use the new IceCube Enhanced Starting Track Event Selection (ESTES), which identifies events likely generated by muon neutrino interactions within the detector geometry, focusing on neutrino energies of 1-500 TeV with a median angular resolution of 1.4°. Selecting for starting track events filters out not only the atmospheric-muon background, but also the atmospheric-neutrino background in the southern sky. This improves IceCube's muon neutrino sensitivity to southern-sky neutrino sources, especially for Galactic sources that are not expected to produce a substantial flux of neutrinos above 100 TeV. In this work, the ESTES sample was applied for the first time to searches for astrophysical sources of neutrinos, including a search for diffuse neutrino emission from the Galactic plane. No significant excesses were identified from any of the analyses; however, constraining limits are set on the hadronic emission from TeV gamma-ray Galactic plane objects and models of the diffuse Galactic plane neutrino flux.

Physics - High Energy Astrophysical Phenomena

Details

Title: Subtitle: Time-Integrated Southern-Sky Neutrino Source Searches with 10 Years of IceCube Starting-Track Events at Energies Down to 1 TeV
Creators: R. Abbasi - Loyola University Chicago
M. Ackermann - Deutsches Elektronen-Synchrotron DESY
J. Adams - University of Canterbury
S. K. Agarwalla - University of Wisconsin–Madison
J. A. Aguilar - Université Libre de Bruxelles
M. Ahlers - University of Copenhagen
J M Alameddine - TU Dortmund University
N. M. Amin - University of Delaware
M Hostert (Contributor)
IceCube Collaboration
Resource Type: Preprint
Publication Details: ArXiv.org
DOI: 10.48550/arxiv.2501.16440
ISSN: 2331-8422
Publisher: Cornell University; Ithaca, New York
Language: English
Date posted: 01/27/2025
Academic Unit: Physics and Astronomy
Record Identifier: 9984946613402771

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