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Title: Aspects of the flavor triangle for cosmic neutrino propagation

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Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 1550-7998
American Physical Society
Country of Publication:
United States

Citation Formats

Fu, Lingjun, Ho, Chiu Man, and Weiler, Thomas J. Aspects of the flavor triangle for cosmic neutrino propagation. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.053001.
Fu, Lingjun, Ho, Chiu Man, & Weiler, Thomas J. Aspects of the flavor triangle for cosmic neutrino propagation. United States. doi:10.1103/PhysRevD.91.053001.
Fu, Lingjun, Ho, Chiu Man, and Weiler, Thomas J. 2015. "Aspects of the flavor triangle for cosmic neutrino propagation". United States. doi:10.1103/PhysRevD.91.053001.
title = {Aspects of the flavor triangle for cosmic neutrino propagation},
author = {Fu, Lingjun and Ho, Chiu Man and Weiler, Thomas J.},
abstractNote = {},
doi = {10.1103/PhysRevD.91.053001},
journal = {Physical Review D},
number = 5,
volume = 91,
place = {United States},
year = 2015,
month = 3

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.91.053001

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Cited by: 14works
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  • The flavor composition of ultra-high energy cosmic neutrinos (UHECN) carries precious information about the physical properties of their sources, the nature of neutrino oscillations and possible exotic physics involved during the propagation. Since UHECN with different incoming directions would propagate through different amounts of matter in Earth and since different flavors of charged leptons produced in the neutrino-nucleon charged-current (CC) interaction would have different energy-loss behaviors in the medium, measurement of the angular distribution of incoming events by a neutrino observatory can in principle be employed to help determine the UHECN flavor ratio. In this paper we report on ourmore » investigation of the feasibility of such an attempt. Simulations were performed, where the detector configuration was based on the proposed Askaryan Radio Array (ARA) Observatory at the South Pole, to investigate the expected event-direction distribution for each flavor. Assuming ν{sub μ}-ν{sub τ} symmetry and invoking the standard oscillation and the neutrino decay scenarios, the probability distribution functions (PDF) of the event directions are utilized to extract the flavor ratio of cosmogenic neutrinos on Earth. The simulation results are summarized in terms of the probability of flavor ratio extraction and resolution as functions of the number of observed events and the angular resolution of neutrino directions. We show that it is feasible to constrain the UHECN flavor ratio using the proposed ARA Observatory.« less
  • The propagation of UHECR nuclei for A = 1(protons) to A = 56(iron) from cosmological sources through extragalactic space is discussed in the first lecture. This is followed in the second and third lectures by a consideration of the generation and propagation of secondary particles produced via the UHECR loss interactions. In the second lecture we focus on the generation of the diffuse cosmogenic UHE-neutrino flux. In the third lecture we investigate the arriving flux of UHE-photon flux at Earth. In the final lecture the results of the previous lectures are put together in order to provide new insights intomore » UHECR sources. The first of these providing a means with which to investigate the local population of UHECR sources through the measurement of the UHECR spectrum and their photon fraction at Earth. The second of these providing contraints on the UHECR source radiation fields through the possible observation at Earth of UHECR nuclei.« less