Neutrino flavor composition using High Energy Starting Events with IceCube

Icecube Collaboration

doi:10.22323/1.501.1198

Neutrino flavor composition using High Energy Starting Events with IceCube

Icecube Collaboration

Department of Physics

University of Delaware
RWTH Aachen University
Karlsruhe Institute of Technology
Adelaide University
Loyola University Chicago
German Electron Synchrotron
University of Canterbury
University of Wisconsin–Madison
Université libre de Bruxelles
University of Copenhagen
TU Dortmund University
University of Kansas
Marquette University
Harvard University
University of Utah
Michigan State University
South Dakota School of Mines & Technology
University of California at Irvine
Technical University of Munich
University of California at Berkeley
Ohio State University
Ruhr University Bochum
Uppsala University
University of Rochester
University of Maryland, College Park
University of Padua
University of Alabama
Johannes Gutenberg University Mainz
Georgia Institute of Technology
Queen's University Kingston

Research output: Contribution to journal › Conference article › peer-review

Abstract

Astrophysical neutrinos provide crucial insights into their sources and play a key role in multimessenger astronomy. The neutrino flavor composition at Earth allows us to probe the mechanisms of neutrino production and cosmic ray acceleration, as well as the properties of the environments in which they originate. Understanding the flavor composition also offers a unique opportunity to test new physics in the neutrino sector. The IceCube Neutrino Observatory consists of 1 km³ of ice instrumented with photomultipliers that detect neutrinos through Cherenkov radiation from their interaction products. Different neutrino interactions result in distinct event topologies, such as tracks, cascades, and double cascade events, which allow for the identification of the interacting neutrino type and measurement of the flavor composition of the astrophysical neutrino flux. In this contribution we present the results of the measurement of the flavor ratio of the High-Energy Starting Event Selection based on 12 years of data, a high-purity sample of neutrino interactions that occur inside the detector. In addition, we discuss various methods that could further improve the analysis in the future.

Original language	English
Article number	1198
Journal	Proceedings of Science
Volume	501
DOIs	https://doi.org/10.22323/1.501.1198
State	Published - 30 Dec 2025
Event	39th International Cosmic Ray Conference, ICRC 2025 - Geneva, Switzerland Duration: 15 Jul 2025 → 24 Jul 2025

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10.22323/1.501.1198

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@article{a9a85fa9c1a240a1a8fd7122d19c45e4,

title = "Neutrino flavor composition using High Energy Starting Events with IceCube",

abstract = "Astrophysical neutrinos provide crucial insights into their sources and play a key role in multimessenger astronomy. The neutrino flavor composition at Earth allows us to probe the mechanisms of neutrino production and cosmic ray acceleration, as well as the properties of the environments in which they originate. Understanding the flavor composition also offers a unique opportunity to test new physics in the neutrino sector. The IceCube Neutrino Observatory consists of 1 km3 of ice instrumented with photomultipliers that detect neutrinos through Cherenkov radiation from their interaction products. Different neutrino interactions result in distinct event topologies, such as tracks, cascades, and double cascade events, which allow for the identification of the interacting neutrino type and measurement of the flavor composition of the astrophysical neutrino flux. In this contribution we present the results of the measurement of the flavor ratio of the High-Energy Starting Event Selection based on 12 years of data, a high-purity sample of neutrino interactions that occur inside the detector. In addition, we discuss various methods that could further improve the analysis in the future.",

author = "\{Icecube Collaboration\} and Schroeder, \{Frank G.\} and Federico Bontempo and R. Abbasi and M. Ackermann and J. Adams and Agarwalla, \{S. K.\} and Aguilar, \{J. A.\} and M. Ahlers and Alameddine, \{J. M.\} and S. Ali and Amin, \{N. M.\} and K. Andeen and C. Arg{\"u}elles and Y. Ashida and S. Athanasiadou and Axani, \{S. N.\} and R. Babu and X. Bai and J. Baines-Holmes and A. Balagopal and Barwick, \{S. W.\} and S. Bash and V. Basu and R. Bay and Beatty, \{J. J.\} and Tjus, \{J. Becker\} and P. Behrens and J. Beise and C. Bellenghi and B. Benkel and S. BenZvi and D. Berley and E. Bernardini and Besson, \{D. Z.\} and E. Blaufuss and L. Bloom and S. Blot and I. Bodo and F. Bontempo and Motzkin, \{J. Y.Book\} and Meneguolo, \{C. Boscolo\} and S. B{\"o}ser and O. Botner and J. B{\"o}ttcher and J. Braun and B. Brinson and Z. Brisson-Tsavoussis and Burley, \{R. T.\} and D. Butterfield and Rho, \{C. D.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s); 39th International Cosmic Ray Conference, ICRC 2025 ; Conference date: 15-07-2025 Through 24-07-2025",

year = "2025",

month = dec,

day = "30",

doi = "10.22323/1.501.1198",

language = "English",

volume = "501",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

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TY - JOUR

T1 - Neutrino flavor composition using High Energy Starting Events with IceCube

AU - Icecube Collaboration

AU - Schroeder, Frank G.

AU - Bontempo, Federico

AU - Abbasi, R.

AU - Ackermann, M.

AU - Adams, J.

AU - Agarwalla, S. K.

AU - Aguilar, J. A.

AU - Ahlers, M.

AU - Alameddine, J. M.

AU - Ali, S.

AU - Amin, N. M.

AU - Andeen, K.

AU - Argüelles, C.

AU - Ashida, Y.

AU - Athanasiadou, S.

AU - Axani, S. N.

AU - Babu, R.

AU - Bai, X.

AU - Baines-Holmes, J.

AU - Balagopal, A.

AU - Barwick, S. W.

AU - Bash, S.

AU - Basu, V.

AU - Bay, R.

AU - Beatty, J. J.

AU - Tjus, J. Becker

AU - Behrens, P.

AU - Beise, J.

AU - Bellenghi, C.

AU - Benkel, B.

AU - BenZvi, S.

AU - Berley, D.

AU - Bernardini, E.

AU - Besson, D. Z.

AU - Blaufuss, E.

AU - Bloom, L.

AU - Blot, S.

AU - Bodo, I.

AU - Bontempo, F.

AU - Motzkin, J. Y.Book

AU - Meneguolo, C. Boscolo

AU - Böser, S.

AU - Botner, O.

AU - Böttcher, J.

AU - Braun, J.

AU - Brinson, B.

AU - Brisson-Tsavoussis, Z.

AU - Burley, R. T.

AU - Butterfield, D.

AU - Rho, C. D.

PY - 2025/12/30

Y1 - 2025/12/30

N2 - Astrophysical neutrinos provide crucial insights into their sources and play a key role in multimessenger astronomy. The neutrino flavor composition at Earth allows us to probe the mechanisms of neutrino production and cosmic ray acceleration, as well as the properties of the environments in which they originate. Understanding the flavor composition also offers a unique opportunity to test new physics in the neutrino sector. The IceCube Neutrino Observatory consists of 1 km3 of ice instrumented with photomultipliers that detect neutrinos through Cherenkov radiation from their interaction products. Different neutrino interactions result in distinct event topologies, such as tracks, cascades, and double cascade events, which allow for the identification of the interacting neutrino type and measurement of the flavor composition of the astrophysical neutrino flux. In this contribution we present the results of the measurement of the flavor ratio of the High-Energy Starting Event Selection based on 12 years of data, a high-purity sample of neutrino interactions that occur inside the detector. In addition, we discuss various methods that could further improve the analysis in the future.

AB - Astrophysical neutrinos provide crucial insights into their sources and play a key role in multimessenger astronomy. The neutrino flavor composition at Earth allows us to probe the mechanisms of neutrino production and cosmic ray acceleration, as well as the properties of the environments in which they originate. Understanding the flavor composition also offers a unique opportunity to test new physics in the neutrino sector. The IceCube Neutrino Observatory consists of 1 km3 of ice instrumented with photomultipliers that detect neutrinos through Cherenkov radiation from their interaction products. Different neutrino interactions result in distinct event topologies, such as tracks, cascades, and double cascade events, which allow for the identification of the interacting neutrino type and measurement of the flavor composition of the astrophysical neutrino flux. In this contribution we present the results of the measurement of the flavor ratio of the High-Energy Starting Event Selection based on 12 years of data, a high-purity sample of neutrino interactions that occur inside the detector. In addition, we discuss various methods that could further improve the analysis in the future.

UR - https://www.scopus.com/pages/publications/105029012552

U2 - 10.22323/1.501.1198

DO - 10.22323/1.501.1198

M3 - Conference article

AN - SCOPUS:105029012552

SN - 1824-8039

VL - 501

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 1198

T2 - 39th International Cosmic Ray Conference, ICRC 2025

Y2 - 15 July 2025 through 24 July 2025

ER -

Neutrino flavor composition using High Energy Starting Events with IceCube

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