Two-component flux explanation for the high energy neutrino events at IceCube
Abstract
In understanding the spectral and flavor composition of the astrophysical neutrino flux responsible for the recently observed ultrahigh-energy events at IceCube we see how important both astrophysics and particle physics are. Here, we perform a statistical likelihood analysis to the three-year IceCube data and derive the allowed range of the spectral index and flux normalization for various well-motivated physical flavor compositions at the source. While most of the existing analyses so far assume the flavor composition of the neutrinos at an astrophysical source to be (1:2:0), it seems rather unnatural to assume only one type of source, once we recognize the possibility of at least two physical sources. Bearing this in mind, we entertain the possibility of a two-component source for the analysis of IceCube data. It appears that our two-component hypothesis explains some key features of the data better than a single-component scenario; i.e. it addresses the apparent energy gap between 400 TeV and about 1 PeV and easily accommodates the observed track-to-shower ratio. Given the extreme importance of the flavor composition for the correct interpretation of the underlying astrophysical processes as well as for the ramification for particle physics, this two-component flux should be tested as more datamore »
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
- Univ. of Manchester (United Kingdom). Consortium for Fundamental Physics
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1412635
- Alternate Identifier(s):
- OSTI ID: 1222515
- Report Number(s):
- BNL-113788-2017-JA
Journal ID: ISSN 1550-7998; PRVDAQ; KA2401012; TRN: US1800307
- Grant/Contract Number:
- SC0012704; AC02-98CH10886
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; flux; neutrino; IceCube; HE
Citation Formats
Chen, Chien-Yi, Dev, P. S. Bhupal, and Soni, Amarjit. Two-component flux explanation for the high energy neutrino events at IceCube. United States: N. p., 2015.
Web. doi:10.1103/PhysRevD.92.073001.
Chen, Chien-Yi, Dev, P. S. Bhupal, & Soni, Amarjit. Two-component flux explanation for the high energy neutrino events at IceCube. United States. https://doi.org/10.1103/PhysRevD.92.073001
Chen, Chien-Yi, Dev, P. S. Bhupal, and Soni, Amarjit. 2015.
"Two-component flux explanation for the high energy neutrino events at IceCube". United States. https://doi.org/10.1103/PhysRevD.92.073001. https://www.osti.gov/servlets/purl/1412635.
@article{osti_1412635,
title = {Two-component flux explanation for the high energy neutrino events at IceCube},
author = {Chen, Chien-Yi and Dev, P. S. Bhupal and Soni, Amarjit},
abstractNote = {In understanding the spectral and flavor composition of the astrophysical neutrino flux responsible for the recently observed ultrahigh-energy events at IceCube we see how important both astrophysics and particle physics are. Here, we perform a statistical likelihood analysis to the three-year IceCube data and derive the allowed range of the spectral index and flux normalization for various well-motivated physical flavor compositions at the source. While most of the existing analyses so far assume the flavor composition of the neutrinos at an astrophysical source to be (1:2:0), it seems rather unnatural to assume only one type of source, once we recognize the possibility of at least two physical sources. Bearing this in mind, we entertain the possibility of a two-component source for the analysis of IceCube data. It appears that our two-component hypothesis explains some key features of the data better than a single-component scenario; i.e. it addresses the apparent energy gap between 400 TeV and about 1 PeV and easily accommodates the observed track-to-shower ratio. Given the extreme importance of the flavor composition for the correct interpretation of the underlying astrophysical processes as well as for the ramification for particle physics, this two-component flux should be tested as more data is accumulated.},
doi = {10.1103/PhysRevD.92.073001},
url = {https://www.osti.gov/biblio/1412635},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 7,
volume = 92,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 2015},
month = {Thu Oct 01 00:00:00 EDT 2015}
}
Web of Science
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Neutrino Telescopes and High-Energy Cosmic Neutrinos
journal, February 2020
- Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco
- Universe, Vol. 6, Issue 2
A multi-component model for observed astrophysical neutrinos
text, January 2018
- Palladino, Andrea; Winter, Walter
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Astrophysical neutrinos flavored with beyond the Standard Model physics
text, January 2017
- Rasmussen, Rasmus W.; Lechner, Lukas; Ackermann, Markus
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Galactic Neutrinos in the TeV to PeV Range
text, January 2015
- Ahlers, Markus; Bai, Yang; Barger, Vernon
- arXiv
Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos
text, January 2015
- Murase, Kohta; Guetta, Dafne; Ahlers, Markus
- arXiv
Heavy right-handed neutrino dark matter and PeV neutrinos at IceCube
text, January 2016
- Dev, P. S. Bhupal; Kazanas, D.; Mohapatra, R. N.
- arXiv
On the IceCube spectral anomaly
text, January 2016
- Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco
- arXiv
Astrophysical neutrinos flavored with Beyond the Standard Model physics
text, January 2017
- Rasmussen, Rasmus W.; Lechner, Lukas; Ackermann, Markus
- arXiv
A Multi-Component Model for the Observed Astrophysical Neutrinos
text, January 2018
- Palladino, Andrea; Winter, Walter
- arXiv
Neutrinophilic Dark Matter in the epoch of IceCube and Fermi-LAT
text, January 2018
- Chianese, Marco; Miele, Gennaro; Morisi, Stefano
- arXiv
Neutrino telescopes and high-energy cosmic neutrinos
text, January 2020
- Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco
- arXiv