Two-component flux explanation for the high energy neutrino events at IceCube

Chen, Chien-Yi; Dev, P. S.  Bhupal; Soni, Amarjit

doi:10.1103/PhysRevD.92.073001

Title: Two-component flux explanation for the high energy neutrino events at IceCube

Journal Article · Thu Oct 01 00:00:00 EDT 2015 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.92.073001· OSTI ID:1412635

Chen, Chien-Yi ^[1]; Dev, P. S. Bhupal ^[2]; Soni, Amarjit ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Univ. of Manchester (United Kingdom). Consortium for Fundamental Physics

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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0012704; AC02-98CH10886

OSTI ID:: 1412635

Alternate ID(s):: OSTI ID: 1222515

Report Number(s):: BNL-113788-2017-JA; PRVDAQ; KA2401012; TRN: US1800307

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 92, Issue 7; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 60 works

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Constraining astrophysical neutrino flavor composition from leptonic unitarity Xu, Xun-Jie; He, Hong-Jian; Rodejohann, Werner Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 12 https://doi.org/10.1088/1475-7516/2014/12/039	journal	December 2014
Secondary neutrinos from tau neutrino interactions in Earth Dutta, Sharada Iyer; Reno, Mary Hall; Sarcevic, Ina Physical Review D, Vol. 66, Issue 7 https://doi.org/10.1103/PhysRevD.66.077302	journal	October 2002
Secondary Photons and Neutrinos from Cosmic Rays Produced by Distant Blazars Essey, Warren; Kalashev, Oleg E.; Kusenko, Alexander Physical Review Letters, Vol. 104, Issue 14 https://doi.org/10.1103/PhysRevLett.104.141102	journal	April 2010
Gamma rays and neutrinos from a cosmic ray source in the Galactic Center region Supanitsky, A. D. Physical Review D, Vol. 89, Issue 2 https://doi.org/10.1103/PhysRevD.89.023501	journal	January 2014
Enhanced signal of astrophysical tau neutrinos propagating through Earth Beacom, John F.; Crotty, Patrick; Kolb, Edward W. Physical Review D, Vol. 66, Issue 2 https://doi.org/10.1103/PhysRevD.66.021302	journal	July 2002
Propagation of superluminal PeV IceCube neutrinos: A high energy spectral cutoff or new constraints on Lorentz invariance violation Stecker, Floyd W.; Scully, Sean T. Physical Review D, Vol. 90, Issue 4 https://doi.org/10.1103/PhysRevD.90.043012	journal	August 2014
Estimates of the cosmic gamma-ray flux at PeV to EeV energies from the EAS-MSU experiment data Fomin, Yu. A.; Kalmykov, N. N.; Kulikov, G. V. JETP Letters, Vol. 100, Issue 11 https://doi.org/10.1134/S0021364014230040	journal	February 2015
High-energy neutrinos in the context of multimessenger astrophysics Becker, Julia K. Physics Reports, Vol. 458, Issue 4-5 https://doi.org/10.1016/j.physrep.2007.10.006	journal	March 2008
Describing the observed cosmic neutrinos by interactions of nuclei with matter Winter, Walter Physical Review D, Vol. 90, Issue 10 https://doi.org/10.1103/PhysRevD.90.103003	journal	November 2014
Testing the newborn pulsar origin of ultrahigh energy cosmic rays with EeV neutrinos Fang, Ke; Kotera, Kumiko; Murase, Kohta Physical Review D, Vol. 90, Issue 10 https://doi.org/10.1103/PhysRevD.90.103005	journal	November 2014
Neutrinoful universe Higaki, Tetsutaro; Kitano, Ryuichiro; Sato, Ryosuke Journal of High Energy Physics, Vol. 2014, Issue 7 https://doi.org/10.1007/JHEP07(2014)044	journal	July 2014
Superheavy particle origin of IceCube PeV neutrino events Barger, Vernon; Keung, Wai-Yee Physics Letters B, Vol. 727, Issue 1-3 https://doi.org/10.1016/j.physletb.2013.10.021	journal	November 2013

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On the IceCube spectral anomaly Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 12 https://doi.org/10.1088/1475-7516/2016/12/045	journal	December 2016
A combined astrophysical and dark matter interpretation of the IceCube HESE and throughgoing muon events Sui, Yicong; Dev, P. S. Bhupal Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 07 https://doi.org/10.1088/1475-7516/2018/07/020	journal	July 2018
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Multi-PeV Signals from a New Astrophysical Neutrino Flux beyond the Glashow Resonance Kistler, Matthew D.; Laha, Ranjan Physical Review Letters, Vol. 120, Issue 24 https://doi.org/10.1103/physrevlett.120.241105	journal	June 2018
The flavor composition of astrophysical neutrinos after 8 years of IceCube: an indication of neutron decay scenario? Palladino, Andrea The European Physical Journal C, Vol. 79, Issue 6 https://doi.org/10.1140/epjc/s10052-019-7018-7	journal	June 2019
Neutrino Telescopes and High-Energy Cosmic Neutrinos Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-00934	text	January 2020
A multi-component model for observed astrophysical neutrinos Palladino, Andrea; Winter, Walter Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2018-02988	text	January 2018
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Astrophysical neutrinos flavored with Beyond the Standard Model physics Rasmussen, Rasmus Westphal; Lechner, Lukas; Ackermann, Markus Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-09752	text	January 2017
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Galactic Neutrinos in the TeV to PeV Range Ahlers, Markus; Bai, Yang; Barger, Vernon arXiv https://doi.org/10.48550/arxiv.1505.03156	text	January 2015
Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos Murase, Kohta; Guetta, Dafne; Ahlers, Markus arXiv https://doi.org/10.48550/arxiv.1509.00805	text	January 2015
Heavy right-handed neutrino dark matter and PeV neutrinos at IceCube Dev, P. S. Bhupal; Kazanas, D.; Mohapatra, R. N. arXiv https://doi.org/10.48550/arxiv.1606.04517	text	January 2016
On the IceCube spectral anomaly Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco arXiv https://doi.org/10.48550/arxiv.1610.07015	text	January 2016
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A Multi-Component Model for the Observed Astrophysical Neutrinos Palladino, Andrea; Winter, Walter arXiv https://doi.org/10.48550/arxiv.1801.07277	text	January 2018
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