skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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 » is accumulated.« less

Authors:
 [1];  [2];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
  2. Univ. of Manchester (United Kingdom). Consortium for Fundamental Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
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:
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. doi:10.1103/PhysRevD.92.073001.
Chen, Chien-Yi, Dev, P. S. Bhupal, and Soni, Amarjit. Thu . "Two-component flux explanation for the high energy neutrino events at IceCube". United States. doi: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},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 7,
volume = 92,
place = {United States},
year = {2015},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

End of the cosmic neutrino energy spectrum
journal, December 2014


Cosmic neutrino pevatrons: A brand new pathway to astronomy, astrophysics, and particle physics
journal, May 2014


High-energy cosmic neutrinos from spine-sheath BL Lac jets
journal, June 2015

  • Tavecchio, F.; Ghisellini, G.
  • Monthly Notices of the Royal Astronomical Society, Vol. 451, Issue 2
  • DOI: 10.1093/mnras/stv1023

The Diffuse Gamma-Ray flux Associated with Sub-Pev/Pev Neutrinos from Starburst Galaxies
journal, September 2014


PeV Neutrinos from Intergalactic Interactions of Cosmic Rays Emitted by Active Galactic Nuclei
journal, July 2013


Probing the birth of fast rotating magnetars through high-energy neutrinos
journal, May 2009


Cosmic neutrino background absorption line in the neutrino spectrum at IceCube
journal, September 2014


STRUCTURED JETS IN BL LAC OBJECTS: EFFICIENT PeV NEUTRINO FACTORIES?
journal, September 2014

  • Tavecchio, Fabrizio; Ghisellini, Gabriele; Guetta, Dafne
  • The Astrophysical Journal, Vol. 793, Issue 1
  • DOI: 10.1088/2041-8205/793/1/L18

IceCube PeV cascade events initiated by electron-antineutrinos at Glashow resonance
journal, February 2013


Cosmological implications of high-energy neutrino emission from the decay of long-lived particle
journal, October 2014

  • Ema, Yohei; Jinno, Ryusuke; Moroi, Takeo
  • Journal of High Energy Physics, Vol. 2014, Issue 10
  • DOI: 10.1007/JHEP10(2014)150

Galactic Center origin of a subset of IceCube neutrino events
journal, October 2013


TeV–PeV Neutrinos from Low-Power Gamma-Ray Burst Jets inside Stars
journal, September 2013


QCD and strongly coupled gauge theories: challenges and perspectives
journal, October 2014


SUB-PeV NEUTRINOS FROM TeV UNIDENTIFIED SOURCES IN THE GALAXY
journal, August 2013


Origin of the High Energy Cosmic Neutrino Background
journal, November 2014


Neutrinos at IceCube from heavy decaying dark matter
journal, July 2013


Aspects of the flavor triangle for cosmic neutrino propagation
journal, March 2015


Cosmic neutrino flavor ratios with broken <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mi>μ</mml:mi></mml:mrow></mml:msub></mml:math>–<mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mi>τ</mml:mi></mml:mrow></mml:msub></mml:math> symmetry
journal, December 2012


Implications of a PeV neutrino spectral cut-off in gamma-ray burst models
journal, September 2014

  • Petropoulou, M.; Giannios, D.; Dimitrakoudis, S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 1
  • DOI: 10.1093/mnras/stu1757

A new physics interpretation of the IceCube data
journal, May 2015


Estimating nonlinear QCD effects in ultrahigh energy neutrino events at IceCube
journal, September 2014


High-energy neutrino signatures of newborn pulsars in the local universe
journal, June 2015


Neutrino and cosmic-ray emission from multiple internal shocks in gamma-ray bursts
journal, April 2015

  • Bustamante, Mauricio; Baerwald, Philipp; Murase, Kohta
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms7783

Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
journal, September 2014


Cosmic-ray neutrinos from the decay of long-lived particle and the recent IceCube result
journal, June 2014


Ultrahigh-energy neutrino interactions
journal, August 1996


Implications of Fermi -LAT observations on the origin of IceCube neutrinos
journal, November 2014


The Glashow resonance at IceCube: signatures, event rates and pp vs. p γ interactions
journal, October 2011

  • Bhattacharya, Atri; Gandhi, Raj; Rodejohann, Werner
  • Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 10
  • DOI: 10.1088/1475-7516/2011/10/017

Demystifying the PeV cascades in IceCube: Less (energy) is more (events)
journal, August 2013


Invisible decays of ultra-high energy neutrinos
journal, January 2013


Testing the hadronuclear origin of PeV neutrinos observed with IceCube
journal, December 2013


Tri-bimaximal mixing and the neutrino oscillation data
journal, March 2002


Some possible sources of IceCube TeV–PeV neutrino events
journal, June 2015


Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
journal, July 2014

  • Padovani, P.; Resconi, E.
  • Monthly Notices of the Royal Astronomical Society, Vol. 443, Issue 1
  • DOI: 10.1093/mnras/stu1166

Charm decay in slow-jet supernovae as the origin of the IceCube ultra-high energy neutrino events
journal, June 2015

  • Bhattacharya, Atri; Enberg, Rikard; Reno, Mary Hall
  • Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 06
  • DOI: 10.1088/1475-7516/2015/06/034

Neutrino interactions at ultrahigh energies
journal, September 1998


First Observation of PeV-Energy Neutrinos with IceCube
journal, July 2013


Parton distributions with LHC data
journal, February 2013


Asymptotic freedom in parton language
journal, August 1977


ROLE OF LINE-OF-SIGHT COSMIC-RAY INTERACTIONS IN FORMING THE SPECTRA OF DISTANT BLAZARS IN TeV GAMMA RAYS AND HIGH-ENERGY NEUTRINOS
journal, March 2011


High energy neutrinos from astrophysical sources: An upper bound
journal, December 1998


Preliminary reference Earth model
journal, June 1981


PeV neutrinos from interactions of cosmic rays with the interstellar medium in the Galaxy
journal, May 2014


Galactic halo origin of the neutrinos detected by IceCube
journal, May 2014


Galactic PeV neutrinos from dark matter annihilation
journal, June 2014


Astrophysical Neutrinos: Flavor Ratios Depend on Energy
journal, October 2005


Detecting ντ oscillations at PeV energies
journal, May 1995


Neutrino lighthouse at Sagittarius A*
journal, September 2014


Pinpointing extragalactic neutrino sources in light of recent IceCube observations
journal, August 2014


Photohadronic neutrinos from transients in astrophysical sources
journal, November 1998


Review of Particle Physics
journal, August 2014


Energy reconstruction methods in the IceCube neutrino telescope
journal, March 2014


What IceCube data tell us about neutrino emission from star-forming galaxies (so far)
journal, June 2014

  • Anchordoqui, Luis A.; Paul, Thomas C.; da Silva, Luiz H. M.
  • Physical Review D, Vol. 89, Issue 12
  • DOI: 10.1103/PhysRevD.89.127304

Flavor revolution at IceCube horizons?
journal, July 2014

  • Fargion, Daniele; Paggi, Paolo
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 753
  • DOI: 10.1016/j.nima.2014.03.006

Pinning down the cosmic ray source mechanism with new IceCube data
journal, April 2014


Diffuse PeV neutrinos from EeV cosmic ray sources: Semirelativistic hypernova remnants in star-forming galaxies
journal, April 2014


High-energy gamma-ray and neutrino backgrounds from clusters of galaxies and radio constraints
journal, May 2015


IceCube PeV-EeV neutrinos and secret interactions of neutrinos
journal, June 2014

  • Ioka, K.; Murase, K.
  • Progress of Theoretical and Experimental Physics, Vol. 2014, Issue 6
  • DOI: 10.1093/ptep/ptu090

Cosmic PeV neutrinos and the sources of ultrahigh energy protons
journal, December 2014


THE SPECTRUM OF ISOTROPIC DIFFUSE GAMMA-RAY EMISSION BETWEEN 100 MeV AND 820 GeV
journal, January 2015


Cosmic neutrino cascades from secret neutrino interactions
journal, September 2014


Searches for small-scale anisotropies from neutrino point sources with three years of IceCube data
journal, June 2015


Stringent constraint on neutrino Lorentz invariance violation from the two IceCube PeV neutrinos
journal, June 2013


Estimating the contribution of Galactic sources to the diffuse neutrino flux
journal, December 2014


Diffuse neutrino intensity from the inner jets of active galactic nuclei: Impacts of external photon fields and the blazar sequence
journal, July 2014


Inert dark matter in type-II seesaw
journal, September 2014

  • Chen, Chuan-Hung; Nomura, Takaaki
  • Journal of High Energy Physics, Vol. 2014, Issue 9
  • DOI: 10.1007/JHEP09(2014)120

Star-forming galaxies as the origin of diffuse high-energy backgrounds: gamma-ray and neutrino connections, and implications for starburst history
journal, September 2014

  • Tamborra, Irene; Ando, Shin'ichiro; Murase, Kohta
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 09
  • DOI: 10.1088/1475-7516/2014/09/043

Superheavy dark matter and IceCube neutrino signals: Bounds on decaying dark matter
journal, July 2015


Explanation for the Low Flux of High-Energy Astrophysical Muon Neutrinos
journal, April 2013


Neutron β -decay as the origin of IceCube’s PeV (anti)neutrinos
journal, January 2015


IceCube events and decaying dark matter: hints and constraints
journal, December 2014

  • Esmaili, Arman; Kang, Sin Kyu; Serpico, Pasquale Dario
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 12
  • DOI: 10.1088/1475-7516/2014/12/054

Neutrino decays over cosmological distances and the implications for neutrino telescopes
journal, October 2012

  • Baerwald, Philipp; Bustamante, Mauricio; Winter, Walter
  • Journal of Cosmology and Astroparticle Physics, Vol. 2012, Issue 10
  • DOI: 10.1088/1475-7516/2012/10/020

Galactic point sources of TeV antineutrinos
journal, July 2004


Spectral analysis of the high-energy IceCube neutrinos
journal, May 2015


Flavor Composition of the High-Energy Neutrino Events in IceCube
journal, August 2014


Cosmic neutrino spectrum and the muon anomalous magnetic moment in the gauged L μ L τ model
journal, February 2015


Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube
journal, April 2015


Neutrino events at IceCube and the Fermi bubbles
journal, July 2014

  • Lunardini, Cecilia; Razzaque, Soebur; Theodoseau, Kristopher T.
  • Physical Review D, Vol. 90, Issue 2
  • DOI: 10.1103/PhysRevD.90.023016

Possible interpretations of IceCube high-energy neutrino events
journal, February 2015

  • Fong, Chee Sheng; Minakata, Hisakazu; Panes, Boris
  • Journal of High Energy Physics, Vol. 2015, Issue 2
  • DOI: 10.1007/JHEP02(2015)189

Tau neutrinos underground: Signals of ν μ ν τ oscillations with extragalactic neutrinos
journal, November 2000


Pseudo-Dirac neutrinos via a mirror world and depletion of ultrahigh energy neutrinos
journal, February 2014


Searches for Extended and Point-Like Neutrino Sources with four Years of Icecube data
journal, November 2014


Resonant Scattering of Antineutrinos
journal, April 1960


Shower power: isolating the prompt atmospheric neutrino flux using electron neutrinos
journal, November 2004


Atmospheric and astrophysical neutrinos above 1 TeV interacting in IceCube
journal, January 2015


The direct detection of boosted dark matter at high energies and PeV events at IceCube
journal, March 2015


Probing the Galactic origin of the IceCube excess with gamma rays
journal, July 2014


TANAMI blazars in the IceCube PeV-neutrino fields
journal, June 2014


Photopion production in black-hole jets and flat-spectrum radio quasars as PeV neutrino sources
journal, September 2014


End to the Cosmic-Ray Spectrum?
journal, April 1966


Are IceCube neutrinos unveiling PeV-scale decaying dark matter?
journal, November 2013


IceCube astrophysical neutrinos without a spectral cutoff and 1015–1017 eV cosmic gamma radiation
journal, February 2015


Searches for clustering in the time integrated skymap of the ANTARES neutrino telescope
journal, May 2014

  • Adrián-Martínez, S.; Albert, A.; André, M.
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 05
  • DOI: 10.1088/1475-7516/2014/05/001

Standard model explanation of the ultrahigh energy neutrino events at IceCube
journal, February 2014


Neutrinos from Cosmic Accelerators including Magnetic Field and Flavor Effects
journal, January 2012


Neutrino and Cosmic-Ray Emission and Cumulative Background from Radiatively Inefficient Accretion Flows in Low-Luminosity Active Galactic Nuclei
journal, June 2015


Constraining astrophysical neutrino flavor composition from leptonic unitarity
journal, December 2014

  • Xu, Xun-Jie; He, Hong-Jian; Rodejohann, Werner
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 12
  • DOI: 10.1088/1475-7516/2014/12/039

Secondary neutrinos from tau neutrino interactions in Earth
journal, October 2002


Secondary Photons and Neutrinos from Cosmic Rays Produced by Distant Blazars
journal, April 2010


Gamma rays and neutrinos from a cosmic ray source in the Galactic Center region
journal, January 2014


Enhanced signal of astrophysical tau neutrinos propagating through Earth
journal, July 2002


Estimates of the cosmic gamma-ray flux at PeV to EeV energies from the EAS-MSU experiment data
journal, February 2015


High-energy neutrinos in the context of multimessenger astrophysics
journal, March 2008


Describing the observed cosmic neutrinos by interactions of nuclei with matter
journal, November 2014


Testing the newborn pulsar origin of ultrahigh energy cosmic rays with EeV neutrinos
journal, November 2014


Neutrinoful universe
journal, July 2014

  • Higaki, Tetsutaro; Kitano, Ryuichiro; Sato, Ryosuke
  • Journal of High Energy Physics, Vol. 2014, Issue 7
  • DOI: 10.1007/JHEP07(2014)044

Superheavy particle origin of IceCube PeV neutrino events
journal, November 2013